Fatal编程技术网
  • rest/
  • Rest Spring MVC 3.1中的基本身份验证

Rest Spring MVC 3.1中的基本身份验证

rest spring-mvc spring-security

Rest Spring MVC 3.1中的基本身份验证,rest,spring-mvc,spring-security,basic-authentication,restful-authentication,Rest,Spring Mvc,Spring Security,Basic Authentication,Restful Authentication,我正在尝试使用SpringMVC3.1和RESTAPI开发一个示例应用程序 有一个登录表单，用于在用户进入应用程序之前对其进行身份验证。我想使用RESTAPI进行基本身份验证，使用用户在登录表单中提供的凭据（用户名和密码） 我的问题是，我不知道如何使用RESTAPI进行基本身份验证 我已经搜索了很多，但没有得到任何正确的教程，从那里我可以解决我的错误 有谁能给我指点路或告诉我什么好文章吗 现在我正在学习以下教程 但是得到空指针异常 RestClient.java import org.sprin

我正在尝试使用SpringMVC3.1和RESTAPI开发一个示例应用程序

有一个登录表单，用于在用户进入应用程序之前对其进行身份验证。我想使用RESTAPI进行基本身份验证，使用用户在登录表单中提供的凭据（用户名和密码）

我的问题是，我不知道如何使用RESTAPI进行基本身份验证

我已经搜索了很多，但没有得到任何正确的教程，从那里我可以解决我的错误

有谁能给我指点路或告诉我什么好文章吗

现在我正在学习以下教程 但是得到空指针异常

RestClient.java

import org.springframework.web.client.RestTemplate;


public class RestClient {

    RestTemplate restTemplate = new RestTemplate();
    static final String URL = "http://www.assembla.com/spaces/my_spaces";
    static final String username = "aaaaa";
    static final String password = "aaaaa";

    public RestClient() {

        BasicSecureSimpleClientHttpRequestFactory requestFactory = new BasicSecureSimpleClientHttpRequestFactory();
        requestFactory.setCredentialsProvider(new SimpleCredentialsProvider(
                new Credentials(username, password)));
        restTemplate.setRequestFactory(requestFactory);
    }

    public void exec() {
        System.out.println("restTemplate :::::::::::::::::: " + restTemplate);
        String response = restTemplate.getForObject(URL, String.class);
        System.out.println("Response:::::::::::::: " + response);
    }

}

import java.net.HttpURLConnection;
  import sun.misc.BASE64Encoder;


    public class BasicSecureSimpleClientHttpRequestFactory extends
            SecureSimpleClientHttpRequestFactory {

        public BasicSecureSimpleClientHttpRequestFactory() {
        }

        protected void prepareSecureConnection(HttpURLConnection connection) {
            if (credentialsProvider == null) {
                return;
            }
            Credentials credentials = credentialsProvider.getCredentials(null);
            String token = credentials.getUsername() + ":"
                    + credentials.getPassword();
            BASE64Encoder enc = new sun.misc.BASE64Encoder();
            String encodedAuthorization = enc.encode(token.getBytes());
            connection.setRequestProperty("Authorization", "Basic "
                    + encodedAuthorization);
        }
    }

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URI;

import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.SimpleClientHttpRequestFactory;

abstract public class SecureSimpleClientHttpRequestFactory extends
        SimpleClientHttpRequestFactory {

    protected CredentialsProvider credentialsProvider;

    public SecureSimpleClientHttpRequestFactory() {
    }

    public CredentialsProvider getCredentialsProvider() {
        return credentialsProvider;
    }

    public void setCredentialsProvider(CredentialsProvider credentialsProvider) {
        this.credentialsProvider = credentialsProvider;
    }

    @Override
    public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod)
            throws IOException {
        HttpURLConnection connection = openConnection(uri.toURL(), null);
        prepareConnection(connection, httpMethod.name());
        prepareSecureConnection(connection);
        return new SecureSimpleClientHttpRequest(connection);
    }

    abstract protected void prepareSecureConnection(HttpURLConnection connection);

}

import java.io.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.ClientHttpResponse;
public class SecureSimpleClientHttpRequest implements ClientHttpRequest {
    public SecureSimpleClientHttpRequest(HttpURLConnection connection) {
        // TODO Auto-generated constructor stub
    }
    @Override
    public HttpMethod getMethod() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public URI getURI() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public HttpHeaders getHeaders() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public OutputStream getBody() throws IOException {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public ClientHttpResponse execute() throws IOException {
        // TODO Auto-generated method stub
        return null;
    }
}

public class SimpleCredentialsProvider implements CredentialsProvider {

    private Credentials credentials;

    public SimpleCredentialsProvider(Credentials credentials) {
        super();
        this.credentials = credentials;
    }

    @Override
    public Credentials getCredentials(String str) {

        return credentials;
    }

}

public interface CredentialsProvider {

    public Credentials getCredentials(String str);
}

public class Credentials {

    private String username;
    private String password;

    public Credentials(String username, String password) {
        super();
        this.username = username;
        this.password = password;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

}
basicsecuresimpleclienthttpprequestfactory.java

import org.springframework.web.client.RestTemplate;


public class RestClient {

    RestTemplate restTemplate = new RestTemplate();
    static final String URL = "http://www.assembla.com/spaces/my_spaces";
    static final String username = "aaaaa";
    static final String password = "aaaaa";

    public RestClient() {

        BasicSecureSimpleClientHttpRequestFactory requestFactory = new BasicSecureSimpleClientHttpRequestFactory();
        requestFactory.setCredentialsProvider(new SimpleCredentialsProvider(
                new Credentials(username, password)));
        restTemplate.setRequestFactory(requestFactory);
    }

    public void exec() {
        System.out.println("restTemplate :::::::::::::::::: " + restTemplate);
        String response = restTemplate.getForObject(URL, String.class);
        System.out.println("Response:::::::::::::: " + response);
    }

}

import java.net.HttpURLConnection;
  import sun.misc.BASE64Encoder;


    public class BasicSecureSimpleClientHttpRequestFactory extends
            SecureSimpleClientHttpRequestFactory {

        public BasicSecureSimpleClientHttpRequestFactory() {
        }

        protected void prepareSecureConnection(HttpURLConnection connection) {
            if (credentialsProvider == null) {
                return;
            }
            Credentials credentials = credentialsProvider.getCredentials(null);
            String token = credentials.getUsername() + ":"
                    + credentials.getPassword();
            BASE64Encoder enc = new sun.misc.BASE64Encoder();
            String encodedAuthorization = enc.encode(token.getBytes());
            connection.setRequestProperty("Authorization", "Basic "
                    + encodedAuthorization);
        }
    }

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URI;

import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.SimpleClientHttpRequestFactory;

abstract public class SecureSimpleClientHttpRequestFactory extends
        SimpleClientHttpRequestFactory {

    protected CredentialsProvider credentialsProvider;

    public SecureSimpleClientHttpRequestFactory() {
    }

    public CredentialsProvider getCredentialsProvider() {
        return credentialsProvider;
    }

    public void setCredentialsProvider(CredentialsProvider credentialsProvider) {
        this.credentialsProvider = credentialsProvider;
    }

    @Override
    public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod)
            throws IOException {
        HttpURLConnection connection = openConnection(uri.toURL(), null);
        prepareConnection(connection, httpMethod.name());
        prepareSecureConnection(connection);
        return new SecureSimpleClientHttpRequest(connection);
    }

    abstract protected void prepareSecureConnection(HttpURLConnection connection);

}

import java.io.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.ClientHttpResponse;
public class SecureSimpleClientHttpRequest implements ClientHttpRequest {
    public SecureSimpleClientHttpRequest(HttpURLConnection connection) {
        // TODO Auto-generated constructor stub
    }
    @Override
    public HttpMethod getMethod() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public URI getURI() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public HttpHeaders getHeaders() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public OutputStream getBody() throws IOException {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public ClientHttpResponse execute() throws IOException {
        // TODO Auto-generated method stub
        return null;
    }
}

public class SimpleCredentialsProvider implements CredentialsProvider {

    private Credentials credentials;

    public SimpleCredentialsProvider(Credentials credentials) {
        super();
        this.credentials = credentials;
    }

    @Override
    public Credentials getCredentials(String str) {

        return credentials;
    }

}

public interface CredentialsProvider {

    public Credentials getCredentials(String str);
}

public class Credentials {

    private String username;
    private String password;

    public Credentials(String username, String password) {
        super();
        this.username = username;
        this.password = password;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

}
SecureSimpleClientHttpRequestFactory.java

import org.springframework.web.client.RestTemplate;


public class RestClient {

    RestTemplate restTemplate = new RestTemplate();
    static final String URL = "http://www.assembla.com/spaces/my_spaces";
    static final String username = "aaaaa";
    static final String password = "aaaaa";

    public RestClient() {

        BasicSecureSimpleClientHttpRequestFactory requestFactory = new BasicSecureSimpleClientHttpRequestFactory();
        requestFactory.setCredentialsProvider(new SimpleCredentialsProvider(
                new Credentials(username, password)));
        restTemplate.setRequestFactory(requestFactory);
    }

    public void exec() {
        System.out.println("restTemplate :::::::::::::::::: " + restTemplate);
        String response = restTemplate.getForObject(URL, String.class);
        System.out.println("Response:::::::::::::: " + response);
    }

}

import java.net.HttpURLConnection;
  import sun.misc.BASE64Encoder;


    public class BasicSecureSimpleClientHttpRequestFactory extends
            SecureSimpleClientHttpRequestFactory {

        public BasicSecureSimpleClientHttpRequestFactory() {
        }

        protected void prepareSecureConnection(HttpURLConnection connection) {
            if (credentialsProvider == null) {
                return;
            }
            Credentials credentials = credentialsProvider.getCredentials(null);
            String token = credentials.getUsername() + ":"
                    + credentials.getPassword();
            BASE64Encoder enc = new sun.misc.BASE64Encoder();
            String encodedAuthorization = enc.encode(token.getBytes());
            connection.setRequestProperty("Authorization", "Basic "
                    + encodedAuthorization);
        }
    }

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URI;

import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.SimpleClientHttpRequestFactory;

abstract public class SecureSimpleClientHttpRequestFactory extends
        SimpleClientHttpRequestFactory {

    protected CredentialsProvider credentialsProvider;

    public SecureSimpleClientHttpRequestFactory() {
    }

    public CredentialsProvider getCredentialsProvider() {
        return credentialsProvider;
    }

    public void setCredentialsProvider(CredentialsProvider credentialsProvider) {
        this.credentialsProvider = credentialsProvider;
    }

    @Override
    public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod)
            throws IOException {
        HttpURLConnection connection = openConnection(uri.toURL(), null);
        prepareConnection(connection, httpMethod.name());
        prepareSecureConnection(connection);
        return new SecureSimpleClientHttpRequest(connection);
    }

    abstract protected void prepareSecureConnection(HttpURLConnection connection);

}

import java.io.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.ClientHttpResponse;
public class SecureSimpleClientHttpRequest implements ClientHttpRequest {
    public SecureSimpleClientHttpRequest(HttpURLConnection connection) {
        // TODO Auto-generated constructor stub
    }
    @Override
    public HttpMethod getMethod() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public URI getURI() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public HttpHeaders getHeaders() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public OutputStream getBody() throws IOException {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public ClientHttpResponse execute() throws IOException {
        // TODO Auto-generated method stub
        return null;
    }
}

public class SimpleCredentialsProvider implements CredentialsProvider {

    private Credentials credentials;

    public SimpleCredentialsProvider(Credentials credentials) {
        super();
        this.credentials = credentials;
    }

    @Override
    public Credentials getCredentials(String str) {

        return credentials;
    }

}

public interface CredentialsProvider {

    public Credentials getCredentials(String str);
}

public class Credentials {

    private String username;
    private String password;

    public Credentials(String username, String password) {
        super();
        this.username = username;
        this.password = password;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

}
SecureSimpleClientHttpRequest.java

import org.springframework.web.client.RestTemplate;


public class RestClient {

    RestTemplate restTemplate = new RestTemplate();
    static final String URL = "http://www.assembla.com/spaces/my_spaces";
    static final String username = "aaaaa";
    static final String password = "aaaaa";

    public RestClient() {

        BasicSecureSimpleClientHttpRequestFactory requestFactory = new BasicSecureSimpleClientHttpRequestFactory();
        requestFactory.setCredentialsProvider(new SimpleCredentialsProvider(
                new Credentials(username, password)));
        restTemplate.setRequestFactory(requestFactory);
    }

    public void exec() {
        System.out.println("restTemplate :::::::::::::::::: " + restTemplate);
        String response = restTemplate.getForObject(URL, String.class);
        System.out.println("Response:::::::::::::: " + response);
    }

}

import java.net.HttpURLConnection;
  import sun.misc.BASE64Encoder;


    public class BasicSecureSimpleClientHttpRequestFactory extends
            SecureSimpleClientHttpRequestFactory {

        public BasicSecureSimpleClientHttpRequestFactory() {
        }

        protected void prepareSecureConnection(HttpURLConnection connection) {
            if (credentialsProvider == null) {
                return;
            }
            Credentials credentials = credentialsProvider.getCredentials(null);
            String token = credentials.getUsername() + ":"
                    + credentials.getPassword();
            BASE64Encoder enc = new sun.misc.BASE64Encoder();
            String encodedAuthorization = enc.encode(token.getBytes());
            connection.setRequestProperty("Authorization", "Basic "
                    + encodedAuthorization);
        }
    }

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URI;

import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.SimpleClientHttpRequestFactory;

abstract public class SecureSimpleClientHttpRequestFactory extends
        SimpleClientHttpRequestFactory {

    protected CredentialsProvider credentialsProvider;

    public SecureSimpleClientHttpRequestFactory() {
    }

    public CredentialsProvider getCredentialsProvider() {
        return credentialsProvider;
    }

    public void setCredentialsProvider(CredentialsProvider credentialsProvider) {
        this.credentialsProvider = credentialsProvider;
    }

    @Override
    public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod)
            throws IOException {
        HttpURLConnection connection = openConnection(uri.toURL(), null);
        prepareConnection(connection, httpMethod.name());
        prepareSecureConnection(connection);
        return new SecureSimpleClientHttpRequest(connection);
    }

    abstract protected void prepareSecureConnection(HttpURLConnection connection);

}

import java.io.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.ClientHttpResponse;
public class SecureSimpleClientHttpRequest implements ClientHttpRequest {
    public SecureSimpleClientHttpRequest(HttpURLConnection connection) {
        // TODO Auto-generated constructor stub
    }
    @Override
    public HttpMethod getMethod() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public URI getURI() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public HttpHeaders getHeaders() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public OutputStream getBody() throws IOException {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public ClientHttpResponse execute() throws IOException {
        // TODO Auto-generated method stub
        return null;
    }
}

public class SimpleCredentialsProvider implements CredentialsProvider {

    private Credentials credentials;

    public SimpleCredentialsProvider(Credentials credentials) {
        super();
        this.credentials = credentials;
    }

    @Override
    public Credentials getCredentials(String str) {

        return credentials;
    }

}

public interface CredentialsProvider {

    public Credentials getCredentials(String str);
}

public class Credentials {

    private String username;
    private String password;

    public Credentials(String username, String password) {
        super();
        this.username = username;
        this.password = password;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

}
SimpleCredentialsProvider.java

import org.springframework.web.client.RestTemplate;


public class RestClient {

    RestTemplate restTemplate = new RestTemplate();
    static final String URL = "http://www.assembla.com/spaces/my_spaces";
    static final String username = "aaaaa";
    static final String password = "aaaaa";

    public RestClient() {

        BasicSecureSimpleClientHttpRequestFactory requestFactory = new BasicSecureSimpleClientHttpRequestFactory();
        requestFactory.setCredentialsProvider(new SimpleCredentialsProvider(
                new Credentials(username, password)));
        restTemplate.setRequestFactory(requestFactory);
    }

    public void exec() {
        System.out.println("restTemplate :::::::::::::::::: " + restTemplate);
        String response = restTemplate.getForObject(URL, String.class);
        System.out.println("Response:::::::::::::: " + response);
    }

}

import java.net.HttpURLConnection;
  import sun.misc.BASE64Encoder;


    public class BasicSecureSimpleClientHttpRequestFactory extends
            SecureSimpleClientHttpRequestFactory {

        public BasicSecureSimpleClientHttpRequestFactory() {
        }

        protected void prepareSecureConnection(HttpURLConnection connection) {
            if (credentialsProvider == null) {
                return;
            }
            Credentials credentials = credentialsProvider.getCredentials(null);
            String token = credentials.getUsername() + ":"
                    + credentials.getPassword();
            BASE64Encoder enc = new sun.misc.BASE64Encoder();
            String encodedAuthorization = enc.encode(token.getBytes());
            connection.setRequestProperty("Authorization", "Basic "
                    + encodedAuthorization);
        }
    }

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URI;

import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.SimpleClientHttpRequestFactory;

abstract public class SecureSimpleClientHttpRequestFactory extends
        SimpleClientHttpRequestFactory {

    protected CredentialsProvider credentialsProvider;

    public SecureSimpleClientHttpRequestFactory() {
    }

    public CredentialsProvider getCredentialsProvider() {
        return credentialsProvider;
    }

    public void setCredentialsProvider(CredentialsProvider credentialsProvider) {
        this.credentialsProvider = credentialsProvider;
    }

    @Override
    public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod)
            throws IOException {
        HttpURLConnection connection = openConnection(uri.toURL(), null);
        prepareConnection(connection, httpMethod.name());
        prepareSecureConnection(connection);
        return new SecureSimpleClientHttpRequest(connection);
    }

    abstract protected void prepareSecureConnection(HttpURLConnection connection);

}

import java.io.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.ClientHttpResponse;
public class SecureSimpleClientHttpRequest implements ClientHttpRequest {
    public SecureSimpleClientHttpRequest(HttpURLConnection connection) {
        // TODO Auto-generated constructor stub
    }
    @Override
    public HttpMethod getMethod() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public URI getURI() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public HttpHeaders getHeaders() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public OutputStream getBody() throws IOException {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public ClientHttpResponse execute() throws IOException {
        // TODO Auto-generated method stub
        return null;
    }
}

public class SimpleCredentialsProvider implements CredentialsProvider {

    private Credentials credentials;

    public SimpleCredentialsProvider(Credentials credentials) {
        super();
        this.credentials = credentials;
    }

    @Override
    public Credentials getCredentials(String str) {

        return credentials;
    }

}

public interface CredentialsProvider {

    public Credentials getCredentials(String str);
}

public class Credentials {

    private String username;
    private String password;

    public Credentials(String username, String password) {
        super();
        this.username = username;
        this.password = password;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

}
CredentialsProvider.java

import org.springframework.web.client.RestTemplate;


public class RestClient {

    RestTemplate restTemplate = new RestTemplate();
    static final String URL = "http://www.assembla.com/spaces/my_spaces";
    static final String username = "aaaaa";
    static final String password = "aaaaa";

    public RestClient() {

        BasicSecureSimpleClientHttpRequestFactory requestFactory = new BasicSecureSimpleClientHttpRequestFactory();
        requestFactory.setCredentialsProvider(new SimpleCredentialsProvider(
                new Credentials(username, password)));
        restTemplate.setRequestFactory(requestFactory);
    }

    public void exec() {
        System.out.println("restTemplate :::::::::::::::::: " + restTemplate);
        String response = restTemplate.getForObject(URL, String.class);
        System.out.println("Response:::::::::::::: " + response);
    }

}

import java.net.HttpURLConnection;
  import sun.misc.BASE64Encoder;


    public class BasicSecureSimpleClientHttpRequestFactory extends
            SecureSimpleClientHttpRequestFactory {

        public BasicSecureSimpleClientHttpRequestFactory() {
        }

        protected void prepareSecureConnection(HttpURLConnection connection) {
            if (credentialsProvider == null) {
                return;
            }
            Credentials credentials = credentialsProvider.getCredentials(null);
            String token = credentials.getUsername() + ":"
                    + credentials.getPassword();
            BASE64Encoder enc = new sun.misc.BASE64Encoder();
            String encodedAuthorization = enc.encode(token.getBytes());
            connection.setRequestProperty("Authorization", "Basic "
                    + encodedAuthorization);
        }
    }

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URI;

import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.SimpleClientHttpRequestFactory;

abstract public class SecureSimpleClientHttpRequestFactory extends
        SimpleClientHttpRequestFactory {

    protected CredentialsProvider credentialsProvider;

    public SecureSimpleClientHttpRequestFactory() {
    }

    public CredentialsProvider getCredentialsProvider() {
        return credentialsProvider;
    }

    public void setCredentialsProvider(CredentialsProvider credentialsProvider) {
        this.credentialsProvider = credentialsProvider;
    }

    @Override
    public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod)
            throws IOException {
        HttpURLConnection connection = openConnection(uri.toURL(), null);
        prepareConnection(connection, httpMethod.name());
        prepareSecureConnection(connection);
        return new SecureSimpleClientHttpRequest(connection);
    }

    abstract protected void prepareSecureConnection(HttpURLConnection connection);

}

import java.io.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.ClientHttpResponse;
public class SecureSimpleClientHttpRequest implements ClientHttpRequest {
    public SecureSimpleClientHttpRequest(HttpURLConnection connection) {
        // TODO Auto-generated constructor stub
    }
    @Override
    public HttpMethod getMethod() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public URI getURI() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public HttpHeaders getHeaders() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public OutputStream getBody() throws IOException {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public ClientHttpResponse execute() throws IOException {
        // TODO Auto-generated method stub
        return null;
    }
}

public class SimpleCredentialsProvider implements CredentialsProvider {

    private Credentials credentials;

    public SimpleCredentialsProvider(Credentials credentials) {
        super();
        this.credentials = credentials;
    }

    @Override
    public Credentials getCredentials(String str) {

        return credentials;
    }

}

public interface CredentialsProvider {

    public Credentials getCredentials(String str);
}

public class Credentials {

    private String username;
    private String password;

    public Credentials(String username, String password) {
        super();
        this.username = username;
        this.password = password;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

}
Credentials.java

import org.springframework.web.client.RestTemplate;


public class RestClient {

    RestTemplate restTemplate = new RestTemplate();
    static final String URL = "http://www.assembla.com/spaces/my_spaces";
    static final String username = "aaaaa";
    static final String password = "aaaaa";

    public RestClient() {

        BasicSecureSimpleClientHttpRequestFactory requestFactory = new BasicSecureSimpleClientHttpRequestFactory();
        requestFactory.setCredentialsProvider(new SimpleCredentialsProvider(
                new Credentials(username, password)));
        restTemplate.setRequestFactory(requestFactory);
    }

    public void exec() {
        System.out.println("restTemplate :::::::::::::::::: " + restTemplate);
        String response = restTemplate.getForObject(URL, String.class);
        System.out.println("Response:::::::::::::: " + response);
    }

}

import java.net.HttpURLConnection;
  import sun.misc.BASE64Encoder;


    public class BasicSecureSimpleClientHttpRequestFactory extends
            SecureSimpleClientHttpRequestFactory {

        public BasicSecureSimpleClientHttpRequestFactory() {
        }

        protected void prepareSecureConnection(HttpURLConnection connection) {
            if (credentialsProvider == null) {
                return;
            }
            Credentials credentials = credentialsProvider.getCredentials(null);
            String token = credentials.getUsername() + ":"
                    + credentials.getPassword();
            BASE64Encoder enc = new sun.misc.BASE64Encoder();
            String encodedAuthorization = enc.encode(token.getBytes());
            connection.setRequestProperty("Authorization", "Basic "
                    + encodedAuthorization);
        }
    }

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URI;

import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.SimpleClientHttpRequestFactory;

abstract public class SecureSimpleClientHttpRequestFactory extends
        SimpleClientHttpRequestFactory {

    protected CredentialsProvider credentialsProvider;

    public SecureSimpleClientHttpRequestFactory() {
    }

    public CredentialsProvider getCredentialsProvider() {
        return credentialsProvider;
    }

    public void setCredentialsProvider(CredentialsProvider credentialsProvider) {
        this.credentialsProvider = credentialsProvider;
    }

    @Override
    public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod)
            throws IOException {
        HttpURLConnection connection = openConnection(uri.toURL(), null);
        prepareConnection(connection, httpMethod.name());
        prepareSecureConnection(connection);
        return new SecureSimpleClientHttpRequest(connection);
    }

    abstract protected void prepareSecureConnection(HttpURLConnection connection);

}

import java.io.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.ClientHttpResponse;
public class SecureSimpleClientHttpRequest implements ClientHttpRequest {
    public SecureSimpleClientHttpRequest(HttpURLConnection connection) {
        // TODO Auto-generated constructor stub
    }
    @Override
    public HttpMethod getMethod() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public URI getURI() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public HttpHeaders getHeaders() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public OutputStream getBody() throws IOException {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public ClientHttpResponse execute() throws IOException {
        // TODO Auto-generated method stub
        return null;
    }
}

public class SimpleCredentialsProvider implements CredentialsProvider {

    private Credentials credentials;

    public SimpleCredentialsProvider(Credentials credentials) {
        super();
        this.credentials = credentials;
    }

    @Override
    public Credentials getCredentials(String str) {

        return credentials;
    }

}

public interface CredentialsProvider {

    public Credentials getCredentials(String str);
}

public class Credentials {

    private String username;
    private String password;

    public Credentials(String username, String password) {
        super();
        this.username = username;
        this.password = password;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

}
我遇到以下错误：

2012年10月16日12:56:04 PM org.apache.catalina.core.StandardWrapperValve 为Servlet spring引发异常调用SEVERE:Servlet.service（） 位于的java.lang.NullPointerException org.springframework.web.client.RestTemplate$AcceptHeaderRequestCallback.doWithRequest（RestTemplate.java:530） 在 org.springframework.web.client.restemplate.doExecute（restemplate.java:444） 在 org.springframework.web.client.restemplate.execute（restemplate.java:409） 在 org.springframework.web.client.restemplate.getForObject（restemplate.java:207）

一种方法是，如果您已经在使用spring MVC，将其与spring Security结合使用：

由于它以各种方式支持基本身份验证：

另外，请阅读本文，了解如何将其与REST结合使用：

我试图通过以下URL“”提供帮助，但没有成功。