Java 即使在安装&；验证证书
我在Netbeans 8上有以下Java程序（Servlet），在这里我制作一个HTTP GET并发送一些安全凭证。我遇到了许多人讨论的最常见的错误。当我使用HTTP时，它运行良好，但现在URL指向的服务器已经使用HTTPS。以下是Netbeans的Apache Tomcat或TomEE日志上的错误： ================================================================================= 我的错误：Java 即使在安装&；验证证书,java,ssl,netbeans,Java,Ssl,Netbeans,我在Netbeans 8上有以下Java程序（Servlet），在这里我制作一个HTTP GET并发送一些安全凭证。我遇到了许多人讨论的最常见的错误。当我使用HTTP时，它运行良好，但现在URL指向的服务器已经使用HTTPS。以下是Netbeans的Apache Tomcat或TomEE日志上的错误： ================================================================================= 我的错误： 01-Oct-201
01-Oct-2014 14:00:08.497 SEVERE [http-apr-8080-exec-8] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [My_API_Call] in context with path [/testapi] threw exception
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1917)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:301)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:295)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1369)
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:156)
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:925)
at sun.security.ssl.Handshaker.process_record(Handshaker.java:860)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1043)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1343)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1371)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1355)
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:563)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1511)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1439)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
at My_API_Call.sendHttpRequest(My_API_Call.java:129)
at My_API_Call.Group_GET(My_API_Call.java:82)
at My_API_Call.doGet(My_API_Call.java:60)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:618)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:655)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:277)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2381)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2370)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:387)
at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
at sun.security.validator.Validator.validate(Validator.java:260)
at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)
at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1351)
... 39 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:145)
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)
... 45 more
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.sql.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.TimeZone;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.crypto.Mac;
import org.apache.commons.codec.binary.Hex;
import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import org.json.JSONObject;
@WebServlet("/My_API_Call")
public class My_API_Call extends HttpServlet {
public My_API_Call() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
// Allocate a output writer to write the response message into the network socket
PrintWriter out = response.getWriter();
// Write the response message, in an HTML page
try {
out.println("<!DOCTYPE html>"); // HTML 5
out.println("<html><head>");
out.println("<meta http-equiv='Content-Type' content='text/html; charset=UTF-8'>");
out.println("<h3>JSON Response</h3>");
out.println(new Gson().toJson(API_GET()));
out.println("<head><title>My API Call</title></head>");
out.println("<body>");
// Tabulate the request information
out.println("</body></html>");
}
finally {
out.close(); // Always close the output writer
}
}
public static Object API_GET() throws IOException {
String accessKey = "myaccesskey";
String secretKey = "mysecretkey";
String uRLCppList = "https://myapichecking.mydomain.com/webservice/testinggroup/133";
String method = "GET";
java.util.Date currentTime = new java.util.Date();
SimpleDateFormat sdf = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z");
sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
String dateTimeString = sdf.format(currentTime);
String signature = generateSignature(method, secretKey, dateTimeString);
String authorization = accessKey + ":" + signature;
Map<String, String> params = new HashMap<String, String>();
String[] result = sendHttpRequest(uRLCppList, "POST", params, dateTimeString, authorization);
return result;
}
public static String[] sendHttpRequest(String requestUrl, String method, Map<String, String> params, String dateTimeString, String authorization) throws IOException {
List<String> response = new ArrayList<String>();
StringBuffer requestParams = new StringBuffer();
if (params != null && params.size() > 0) {
Iterator<String> paramIterator = params.keySet().iterator();
while (paramIterator.hasNext()) {
String key = paramIterator.next();
String value = params.get(key);
requestParams.append(URLEncoder.encode(key, "UTF-8"));
requestParams.append("=").append(URLEncoder.encode(value, "UTF-8"));
requestParams.append("&");
}
}
URL url = new URL(requestUrl);
URLConnection urlConn = url.openConnection();
urlConn.setRequestProperty("accept", "application/json");
urlConn.setRequestProperty("datetime", dateTimeString);
urlConn.setRequestProperty("authorization", authorization);
urlConn.setUseCaches(false);
// the request will return a response
urlConn.setDoInput(true);
if ("POST".equals(method)) {
// set request method to POST
urlConn.setDoOutput(true);
} else {
// set request method to GET
urlConn.setDoOutput(false);
}
if ("POST".equals(method) && params != null && params.size() > 0) {
OutputStreamWriter writer = new OutputStreamWriter(urlConn.getOutputStream());
writer.write(requestParams.toString());
writer.flush();
}
// reads response, store line by line in an array of Strings
BufferedReader reader = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
String line = "";
while ((line = reader.readLine()) != null) {
response.add(line);
}
reader.close();
return (String[]) response.toArray(new String[0]);
}
public static String generateSignature(String method, String secretKey, String dateTimeString) {
String cs = String.format("%s\n\n\n%s\n\n\n", method, dateTimeString);
String signature = createSignature(cs, secretKey);
return signature;
}
public static String createSignature(String stringIn, String scretKey) {
String fixedData = stringIn.replace('\n', (char)10);
// Calculate the hash of the information
String digest = hmacSha1(scretKey, fixedData);
return digest;
}
public static String hmacSha1(String key, String value) {
try {
// Get an hmac_sha1 key from the raw key bytes
byte[] keyBytes = key.getBytes("iso-8859-1");
SecretKeySpec signingKey = new SecretKeySpec(keyBytes, "HmacSHA1");
// Get an hmac_sha1 Mac instance and initialize with the signing key
Mac mac = Mac.getInstance("HmacSHA1");
mac.init(signingKey);
// Compute the hmac on input data bytes
byte[] rawHmac = mac.doFinal(value.getBytes("iso-8859-1"));
// Covert array of Hex bytes to a String
return Base64.encode(rawHmac);
//return new String(hexBytes, "UTF-8");
}
catch (Exception e) {
throw new RuntimeException(e);
}
}
}
01-Oct-2014 14:00:08.497 SEVERE [http-apr-8080-exec-8] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [My_API_Call] in context with path [/testapi] threw exception
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1917)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:301)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:295)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1369)
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:156)
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:925)
at sun.security.ssl.Handshaker.process_record(Handshaker.java:860)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1043)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1343)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1371)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1355)
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:563)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1511)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1439)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
at My_API_Call.sendHttpRequest(My_API_Call.java:129)
at My_API_Call.Group_GET(My_API_Call.java:82)
at My_API_Call.doGet(My_API_Call.java:60)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:618)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:655)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:277)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2381)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2370)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:387)
at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
at sun.security.validator.Validator.validate(Validator.java:260)
at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)
at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1351)
... 39 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:145)
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)
... 45 more
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.sql.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.TimeZone;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.crypto.Mac;
import org.apache.commons.codec.binary.Hex;
import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import org.json.JSONObject;
@WebServlet("/My_API_Call")
public class My_API_Call extends HttpServlet {
public My_API_Call() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
// Allocate a output writer to write the response message into the network socket
PrintWriter out = response.getWriter();
// Write the response message, in an HTML page
try {
out.println("<!DOCTYPE html>"); // HTML 5
out.println("<html><head>");
out.println("<meta http-equiv='Content-Type' content='text/html; charset=UTF-8'>");
out.println("<h3>JSON Response</h3>");
out.println(new Gson().toJson(API_GET()));
out.println("<head><title>My API Call</title></head>");
out.println("<body>");
// Tabulate the request information
out.println("</body></html>");
}
finally {
out.close(); // Always close the output writer
}
}
public static Object API_GET() throws IOException {
String accessKey = "myaccesskey";
String secretKey = "mysecretkey";
String uRLCppList = "https://myapichecking.mydomain.com/webservice/testinggroup/133";
String method = "GET";
java.util.Date currentTime = new java.util.Date();
SimpleDateFormat sdf = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z");
sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
String dateTimeString = sdf.format(currentTime);
String signature = generateSignature(method, secretKey, dateTimeString);
String authorization = accessKey + ":" + signature;
Map<String, String> params = new HashMap<String, String>();
String[] result = sendHttpRequest(uRLCppList, "POST", params, dateTimeString, authorization);
return result;
}
public static String[] sendHttpRequest(String requestUrl, String method, Map<String, String> params, String dateTimeString, String authorization) throws IOException {
List<String> response = new ArrayList<String>();
StringBuffer requestParams = new StringBuffer();
if (params != null && params.size() > 0) {
Iterator<String> paramIterator = params.keySet().iterator();
while (paramIterator.hasNext()) {
String key = paramIterator.next();
String value = params.get(key);
requestParams.append(URLEncoder.encode(key, "UTF-8"));
requestParams.append("=").append(URLEncoder.encode(value, "UTF-8"));
requestParams.append("&");
}
}
URL url = new URL(requestUrl);
URLConnection urlConn = url.openConnection();
urlConn.setRequestProperty("accept", "application/json");
urlConn.setRequestProperty("datetime", dateTimeString);
urlConn.setRequestProperty("authorization", authorization);
urlConn.setUseCaches(false);
// the request will return a response
urlConn.setDoInput(true);
if ("POST".equals(method)) {
// set request method to POST
urlConn.setDoOutput(true);
} else {
// set request method to GET
urlConn.setDoOutput(false);
}
if ("POST".equals(method) && params != null && params.size() > 0) {
OutputStreamWriter writer = new OutputStreamWriter(urlConn.getOutputStream());
writer.write(requestParams.toString());
writer.flush();
}
// reads response, store line by line in an array of Strings
BufferedReader reader = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
String line = "";
while ((line = reader.readLine()) != null) {
response.add(line);
}
reader.close();
return (String[]) response.toArray(new String[0]);
}
public static String generateSignature(String method, String secretKey, String dateTimeString) {
String cs = String.format("%s\n\n\n%s\n\n\n", method, dateTimeString);
String signature = createSignature(cs, secretKey);
return signature;
}
public static String createSignature(String stringIn, String scretKey) {
String fixedData = stringIn.replace('\n', (char)10);
// Calculate the hash of the information
String digest = hmacSha1(scretKey, fixedData);
return digest;
}
public static String hmacSha1(String key, String value) {
try {
// Get an hmac_sha1 key from the raw key bytes
byte[] keyBytes = key.getBytes("iso-8859-1");
SecretKeySpec signingKey = new SecretKeySpec(keyBytes, "HmacSHA1");
// Get an hmac_sha1 Mac instance and initialize with the signing key
Mac mac = Mac.getInstance("HmacSHA1");
mac.init(signingKey);
// Compute the hmac on input data bytes
byte[] rawHmac = mac.doFinal(value.getBytes("iso-8859-1"));
// Covert array of Hex bytes to a String
return Base64.encode(rawHmac);
//return new String(hexBytes, "UTF-8");
}
catch (Exception e) {
throw new RuntimeException(e);
}
}
}
导入java.io.BufferedReader；
导入java.io.IOException；
导入java.io.InputStreamReader；
导入java.io.OutputStreamWriter；
导入java.io.PrintWriter；
导入java.net.URL；
导入java.net.URLConnection；
导入java.net.urlcoder；
导入java.sql.Date；
导入java.text.DateFormat；
导入java.text.simpleDataFormat；
导入java.util.ArrayList；
导入java.util.Calendar；
导入java.util.HashMap；
导入java.util.Iterator；
导入java.util.List；
导入java.util.Map；
导入java.util.TimeZone；
导入javax.crypto.Mac；
导入javax.crypto.spec.SecretKeySpec；
导入javax.servlet.ServletException；
导入javax.servlet.annotation.WebServlet；
导入javax.servlet.http.HttpServlet；
导入javax.servlet.http.HttpServletRequest；
导入javax.servlet.http.HttpServletResponse；
导入javax.crypto.Mac；
导入org.apache.commons.codec.binary.Hex；
导入com.sun.org.apache.xerces.internal.impl.dv.util.Base64；
导入com.google.gson.gson；
导入com.google.gson.GsonBuilder；
导入org.json.JSONObject；
@WebServlet（“/My\u API\u Call”）
公共类My_API_调用扩展了HttpServlet{
公共My_API_调用（）{
超级（）；
}
受保护的void doGet（HttpServletRequest请求，HttpServletResponse响应）抛出ServletException，IOException{
setContentType（“text/html；charset=UTF-8”）；
//分配一个输出编写器将响应消息写入网络套接字
PrintWriter out=response.getWriter（）；
//在HTML页面中编写响应消息
试一试{
out.println（“”；//HTML5
out.println（“”）；
out.println（“”）；
out.println（“JSON响应”）；
println（新的Gson（）.toJson（API_GET（））；
println（“我的API调用”）；
out.println（“”）；
//将请求信息制成表格
out.println（“”）；
}
最后{
out.close（）；//始终关闭输出写入程序
}
}
公共静态对象API_GET（）引发IOException{
字符串accessKey=“myaccesskey”；
字符串secretKey=“mysecretkey”；
字符串uRLCppList=”https://myapichecking.mydomain.com/webservice/testinggroup/133";
String method=“GET”；
java.util.Date currentTime=new java.util.Date（）；
SimpleDataFormat sdf=新的SimpleDataFormat（“EEE，dd-MMM-yyyy-HH:mm:ss z”）；
设置时区（TimeZone.getTimeZone（“GMT”）；
字符串dateTimeString=sdf.format（currentTime）；
字符串签名=generateSignature（方法、secretKey、dateTimeString）；
字符串授权=accessKey+“：”+签名；
Map params=新的HashMap（）；
字符串[]结果=sendHttpRequest（uRLCppList，“POST”、参数、dateTimeString、授权）；
返回结果；
}
公共静态字符串[]sendHttpRequest（字符串请求URL、字符串方法、映射参数、字符串dateTimeString、字符串授权）引发IOException{
列表响应=新建ArrayList（）；
StringBuffer requestParams=新的StringBuffer（）；
if（params！=null&¶ms.size（）>0）{
迭代器paramIterator=params.keySet（）.Iterator（）；
while（parameterator.hasNext（））{
String key=paramIterator.next（）；
字符串值=params.get（键）；
append（URLEncoder.encode（键，“UTF-8”）；
requestParams.append（“=”）.append（urlcoder.encode（值，“UTF-8”）；
requestParams.append（“&”）；
}
}
URL=新URL（请求URL）；
URLConnection urlConn=url.openConnection（）；
setRequestProperty（“接受”、“应用程序/json”）；
setRequestProperty（“datetime”，dateTimeString）；
urlConn.setRequestProperty（“授权”，授权）；
urlConn.setUseCaches（false）；
//请求将返回一个响应
urlConn.setDoInput（true）；
如果（“POST”。等于（方法））{
//将请求方法设置为POST
urlConn.setDoOutput（真）；
}否则{
//设置要获取的请求方法
urlConn.setDoOutput（假）；
}
if（“POST.equals（method）&¶ms！=null&¶ms.size（）>0）{
OutputStreamWriter writer=新的OutputStreamWriter（urlConn.getOutputStream（））；
writer.write（requestParams.toString（））；
writer.flush（）；
}
//读取响应，在字符串数组中逐行存储
BufferedReader=新的BufferedReader（新的InputStreamReader（urlConn.getInputStream（））；
字符串行=”；
而（（line=reader.readLine（））！=null）{
响应。添加（行）；
}
reader.close（）；
return（String[]）response.toArray（新字符串[0]）；
}
公共静态字符串generateSignature（字符串方法、字符串secretKey、字符串dateTimeString）{
String cs=String.format（“%s\n\n\n%s\n\n\n”，方法，日期时间字符串）；
字符串签名=createSignature（cs，secretKey）；
返回签名；
}
公共静态字符串createSignature（字符串stringIn、字符串scretKey）{
字符串fixedData=stringIn.replace（'\n'，（char）10）；
//计算信息的散列
斯特林