Java 为什么控制器代码不能在spring引导应用程序中执行_Java_Spring_Spring Boot_Jsp

Java 为什么控制器代码不能在spring引导应用程序中执行

java spring spring-boot jsp

Java 为什么控制器代码不能在spring引导应用程序中执行,java,spring,spring-boot,jsp,Java,Spring,Spring Boot,Jsp,我试图在sts3中创建一个简单的Spring启动应用程序，用户可以在其中注册并创建自己的帐户。我正在用hibernate使用PostgreSQL数据库和JPA。下面是代码实体类： package tv.app.user; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; @Entity public class UserAccount

我试图在

sts3

中创建一个简单的

Spring启动应用程序

，用户可以在其中注册并创建自己的帐户。我正在用hibernate使用

PostgreSQL

数据库和

JPA

。下面是代码

实体类：

package tv.app.user;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class UserAccount {
    @Id
    @GeneratedValue
    private Long uid;

    private String username;
    private String email;
    private String password;

    public long getUid() {
        return uid;
    }

    public void setUid(long uid) {
        this.uid = uid;
    }

    public String getUsername() {
        return username;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

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

package tv.app.user;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class UserAccountController {

    @Autowired
    UserAccountService userAccountService;

    @RequestMapping(value="/register", method=RequestMethod.POST)
    public void registerAccount(@RequestBody UserAccount user) {
        System.out.println("------2------");
        System.out.println(user.getfName());
        userAccountService.register(user);
    }
}

package tv.app.user;

import org.springframework.data.repository.CrudRepository;

public interface UserAccountRepository extends CrudRepository<UserAccount, Long> {

}

package tv.app.user;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserAccountService {

    @Autowired
    private UserAccountRepository userRepository;

    public void register(UserAccount user) {
        userRepository.save(user);
    }
}

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
    <form action="/register" method="post">
        <input type="text" name="username" placeholder="Username" required /><br>
        <input type="text" name="email" placeholder="Email ID" required /><br>
        <input type="password" name="password" placeholder="Password" required /><br>
        <input type="submit" value="Signup" />
    </form>
</body>
</html>

控制器：

package tv.app.user;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class UserAccount {
    @Id
    @GeneratedValue
    private Long uid;

    private String username;
    private String email;
    private String password;

    public long getUid() {
        return uid;
    }

    public void setUid(long uid) {
        this.uid = uid;
    }

    public String getUsername() {
        return username;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

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

package tv.app.user;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class UserAccountController {

    @Autowired
    UserAccountService userAccountService;

    @RequestMapping(value="/register", method=RequestMethod.POST)
    public void registerAccount(@RequestBody UserAccount user) {
        System.out.println("------2------");
        System.out.println(user.getfName());
        userAccountService.register(user);
    }
}

package tv.app.user;

import org.springframework.data.repository.CrudRepository;

public interface UserAccountRepository extends CrudRepository<UserAccount, Long> {

}

package tv.app.user;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserAccountService {

    @Autowired
    private UserAccountRepository userRepository;

    public void register(UserAccount user) {
        userRepository.save(user);
    }
}

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
    <form action="/register" method="post">
        <input type="text" name="username" placeholder="Username" required /><br>
        <input type="text" name="email" placeholder="Email ID" required /><br>
        <input type="password" name="password" placeholder="Password" required /><br>
        <input type="submit" value="Signup" />
    </form>
</body>
</html>

存储库：

package tv.app.user;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class UserAccount {
    @Id
    @GeneratedValue
    private Long uid;

    private String username;
    private String email;
    private String password;

    public long getUid() {
        return uid;
    }

    public void setUid(long uid) {
        this.uid = uid;
    }

    public String getUsername() {
        return username;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

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

package tv.app.user;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class UserAccountController {

    @Autowired
    UserAccountService userAccountService;

    @RequestMapping(value="/register", method=RequestMethod.POST)
    public void registerAccount(@RequestBody UserAccount user) {
        System.out.println("------2------");
        System.out.println(user.getfName());
        userAccountService.register(user);
    }
}

package tv.app.user;

import org.springframework.data.repository.CrudRepository;

public interface UserAccountRepository extends CrudRepository<UserAccount, Long> {

}

package tv.app.user;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserAccountService {

    @Autowired
    private UserAccountRepository userRepository;

    public void register(UserAccount user) {
        userRepository.save(user);
    }
}

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
    <form action="/register" method="post">
        <input type="text" name="username" placeholder="Username" required /><br>
        <input type="text" name="email" placeholder="Email ID" required /><br>
        <input type="password" name="password" placeholder="Password" required /><br>
        <input type="submit" value="Signup" />
    </form>
</body>
</html>

Jsp表单：

package tv.app.user;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class UserAccount {
    @Id
    @GeneratedValue
    private Long uid;

    private String username;
    private String email;
    private String password;

    public long getUid() {
        return uid;
    }

    public void setUid(long uid) {
        this.uid = uid;
    }

    public String getUsername() {
        return username;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

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

package tv.app.user;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class UserAccountController {

    @Autowired
    UserAccountService userAccountService;

    @RequestMapping(value="/register", method=RequestMethod.POST)
    public void registerAccount(@RequestBody UserAccount user) {
        System.out.println("------2------");
        System.out.println(user.getfName());
        userAccountService.register(user);
    }
}

package tv.app.user;

import org.springframework.data.repository.CrudRepository;

public interface UserAccountRepository extends CrudRepository<UserAccount, Long> {

}

package tv.app.user;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserAccountService {

    @Autowired
    private UserAccountRepository userRepository;

    public void register(UserAccount user) {
        userRepository.save(user);
    }
}

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
    <form action="/register" method="post">
        <input type="text" name="username" placeholder="Username" required /><br>
        <input type="text" name="email" placeholder="Email ID" required /><br>
        <input type="password" name="password" placeholder="Password" required /><br>
        <input type="submit" value="Signup" />
    </form>
</body>
</html>

似乎在单击submit之后，控件从未进入控制器，因为即使表单中的操作与请求映射相同，也从未将--2--输出到控制台

显示的错误是：

出现意外错误（类型=不支持的媒体类型，状态=415）。 “内容类型”应用程序/x-www-form-urlencoded；字符集=UTF-8'不受支持

确保您正在调用控制器中声明的确切端点（localhost:port/register）。如果调用不正确，可能会输出HTTP 404错误…请检查该错误

如果您没有收到任何HTTP错误，我会将注释更改为这种格式（并相应地将调用更改为/register/user）（如Spring指南所示）：

显示的错误类似于：出现意外错误（类型=不支持的媒体类型，状态=415）。“内容类型”应用程序/x-www-form-urlencoded；charset=UTF-8'不受支持您从何处呼叫控制器？确保正在进行POST调用，并尝试将标题值声明为：application/json是否尝试为请求映射注释设置

consumes

属性以指示您接受的媒体类型？不，我不知道。你能解释一下吗@Mikery正在将

consumes=MediaType.APPLICATION\u FORM\u URLENCODED\u VALUE

添加到您的

@RequestMapping

批注中。尝试了此操作，但无效@MikeStill 415的回应？