JavaWeb-RESTful(三)_使用SpringMVC开发RESTful_下

　　JavaWeb-RESTful(一)_RESTful初认识　　传送门

　　JavaWeb-RESTful(二)_使用SpringMVC开发RESTful_上　　传送门

　　JavaWeb-RESTful(三)_使用SpringMVC开发RESTful_下　　传送门

　　项目已上传至github　　传送门

　　Learn

　　　　一、单元测试：添加用户

　　　　二、单元测试：修改用户

　　　　三、单元测试：删除用户

　　　　四、SpringBoot默认处理异常路径

一、单元测试：添加用户

　　在MainController.java中添加addUser()添加用户的单元测试方法

        @Test

        public void addUser() throws Exception

        {

            mockMvc.perform(MockMvcRequestBuilders.post("/user")

                    .contentType(MediaType.APPLICATION_JSON_UTF8)

                    .content("{\"username\":\"Gary\"}"))

                    .andExpect(MockMvcResultMatchers.status().isOk())

                    .andExpect(MockMvcResultMatchers.jsonPath("$.id").value("1"));

        }

　　给User实体对象设置三个熟悉，id、username、password

    private String username;

    private String password;

    private String id;

　　通过id和username获得的试图都是简单试图，通过password获得的试图是复杂试图

    @JsonView(UserSimpleView.class)

    public String getId() {

        return id;

    }

    @JsonView(UserSimpleView.class)

    public String getUsername() {

        return username;

    }

    @JsonView(UserDetailView.class)

    public String getPassword() {

        return password;

    }

　　在UserController.java中通过addUser()方法获得MainController.java中的addUser()的POST请求

    @RequestMapping(value="/user",method= RequestMethod.POST)

    public User addUser(@RequestBody User user)

    {

        //传输json格式的时候，一定要记得加上@RequestBody注解

        //输出 null

        System.out.println(user.getPassword());

        //输出 Gary

        System.out.println(user.getUsername());

        user.setId("1");

        return user;

    }

package com.Gary.GaryRESTful;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication

public class GaryResTfulApplication {

    public static void main(String[] args) {

        SpringApplication.run(GaryResTfulApplication.class, args);

    }

}

GaryResTfulApplication.java

package com.Gary.GaryRESTful.controller;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

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

import org.springframework.boot.test.context.SpringBootTest;

import org.springframework.http.MediaType;

import org.springframework.test.context.junit4.SpringRunner;

import org.springframework.test.web.servlet.MockMvc;

import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;

import org.springframework.test.web.servlet.result.MockMvcResultMatchers;

import org.springframework.test.web.servlet.setup.MockMvcBuilders;

import org.springframework.web.context.WebApplicationContext;

//这是SpringBoot测试类

@RunWith(SpringRunner.class)

@SpringBootTest

public class MainController {

        @Autowired

        private WebApplicationContext webApplicationContext;

        //SpringMV单元测试独立测试类

        private MockMvc mockMvc;

        @Before

        public void before()

        {

            //创建独立测试类

            mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();

        }

        //@Test

        //查询user

        public void test() throws Exception

        {

            //发起一个Get请求

            String str = mockMvc.perform(MockMvcRequestBuilders.get("/user")

                    .param("username", "Gary")

                        //json的形式发送一个请求

                        .contentType(MediaType.APPLICATION_JSON_UTF8))

                        //期望服务器返回什么(期望返回的状态码为200)

                        .andExpect(MockMvcResultMatchers.status().isOk())

                        //期望服务器返回json中的数组长度为3

                        .andExpect(MockMvcResultMatchers.jsonPath("$.length()").value(3))

                        .andReturn().getResponse().getContentAsString();

            System.out.println("查询简单试图"+str);

        }

        //@Test

        public void getInfo() throws Exception

        {

            //发起一个get请求，查看用户详情

            String str = mockMvc.perform(MockMvcRequestBuilders.get("/user/1")

                    .contentType(MediaType.APPLICATION_JSON_UTF8))

                    .andExpect(MockMvcResultMatchers.status().isOk())

                    .andExpect(MockMvcResultMatchers.jsonPath("$.username").value("Gary"))

                    .andReturn().getResponse().getContentAsString();

            System.out.println("查询复杂试图"+str);

        }

        @Test

        public void addUser() throws Exception

        {

            mockMvc.perform(MockMvcRequestBuilders.post("/user")

                    .contentType(MediaType.APPLICATION_JSON_UTF8)

                    .content("{\"username\":\"Gary\"}"))

                    .andExpect(MockMvcResultMatchers.status().isOk())

                    .andExpect(MockMvcResultMatchers.jsonPath("$.id").value("1"));

        }

}

MainController.java

package com.Gary.GaryRESTful.controller;

import java.util.ArrayList;

import java.util.List;

import org.junit.Test;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.RequestBody;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.bind.annotation.RestController;

import com.Gary.GaryRESTful.dto.User;

import com.fasterxml.jackson.annotation.JsonView;

//表示这个Controller提供R二十天API

@RestController

public class UserController {

    @RequestMapping(value="/user",method = RequestMethod.GET)

    /*

     * default value     默认

     * name             请求的名字

     * required            是否是必须的,true

     * value            别名

     *

     * */

    @JsonView(User.UserSimpleView.class)

    public List<User> query(@RequestParam(name="username",required=false) String username)

    {

        System.out.println(username);

        //满足期望服务器返回json中的数组长度为3

        List<User> list = new ArrayList<>();

        list.add(new User());

        list.add(new User());

        list.add(new User());

        return list;

    }

    @RequestMapping(value="/user/{id}",method= RequestMethod.GET)

    //将@PathVariable路径中的片段映射到java代码中

    @JsonView(User.UserDetailView.class)

    public User getInfo(@PathVariable String id)

    {

        User user = new User();

        user.setUsername("Gary");

        return user;

    }

    @RequestMapping(value="/user",method= RequestMethod.POST)

    public User addUser(@RequestBody User user)

    {

        //传输json格式的时候，一定要记得加上@RequestBody注解

        //输出 null

        System.out.println(user.getPassword());

        //输出 Gary

        System.out.println(user.getUsername());

        user.setId("1");

        return user;

    }

}

UserController.java

package com.Gary.GaryRESTful.dto;

import com.fasterxml.jackson.annotation.JsonView;

public class User {

    //简单试图 只有一个username

    public interface UserSimpleView{};

    //复杂试图 有username 和   password

    public interface UserDetailView extends UserSimpleView{};

    private String username;

    private String password;

    private String id;

    @JsonView(UserSimpleView.class)

    public String getId() {

        return id;

    }

    public void setId(String id) {

        this.id = id;

    }

    @JsonView(UserSimpleView.class)

    public String getUsername() {

        return username;

    }

    public void setUsername(String username) {

        this.username = username;

    }

    @JsonView(UserDetailView.class)

    public String getPassword() {

        return password;

    }

    public void setPassword(String password) {

        this.password = password;

    }

}

User.java

二、单元测试：修改用户

　　在MainController.java中添加updataUser()修改用户的单元测试方法

        //修改用户

        @Test

        public void updataUser() throws Exception

        {

            mockMvc.perform(MockMvcRequestBuilders.put("/user/1")

                    .contentType(MediaType.APPLICATION_JSON_UTF8)

                    .content("{\"username\":\"Garyary\",\"id\":\"1\"}"))

            .andExpect(MockMvcResultMatchers.status().isOk())

            .andExpect(MockMvcResultMatchers.jsonPath("$.id").value("1"));

        }

　　在UserController.java中接收来自updataUser的请求

    //修改用户资料

    @RequestMapping(value="/user/{id}",method = RequestMethod.PUT)

    public User updataUser(@RequestBody User user)

    {

        System.out.println(user.getId());

        System.out.println(user.getUsername());

        System.out.println(user.getPassword());

        return user;

    }

package com.Gary.GaryRESTful;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication

public class GaryResTfulApplication {

    public static void main(String[] args) {

        SpringApplication.run(GaryResTfulApplication.class, args);

    }

}

GaryResTfulApplication.java

package com.Gary.GaryRESTful.controller;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

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

import org.springframework.boot.test.context.SpringBootTest;

import org.springframework.http.MediaType;

import org.springframework.test.context.junit4.SpringRunner;

import org.springframework.test.web.servlet.MockMvc;

import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;

import org.springframework.test.web.servlet.result.MockMvcResultMatchers;

import org.springframework.test.web.servlet.setup.MockMvcBuilders;

import org.springframework.web.context.WebApplicationContext;

//这是SpringBoot测试类

@RunWith(SpringRunner.class)

@SpringBootTest

public class MainController {

        @Autowired

        private WebApplicationContext webApplicationContext;

        //SpringMV单元测试独立测试类

        private MockMvc mockMvc;

        @Before

        public void before()

        {

            //创建独立测试类

            mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();

        }

        //@Test

        //查询user

        public void test() throws Exception

        {

            //发起一个Get请求

            String str = mockMvc.perform(MockMvcRequestBuilders.get("/user")

                    .param("username", "Gary")

                        //json的形式发送一个请求

                        .contentType(MediaType.APPLICATION_JSON_UTF8))

                        //期望服务器返回什么(期望返回的状态码为200)

                        .andExpect(MockMvcResultMatchers.status().isOk())

                        //期望服务器返回json中的数组长度为3

                        .andExpect(MockMvcResultMatchers.jsonPath("$.length()").value(3))

                        .andReturn().getResponse().getContentAsString();

            System.out.println("查询简单试图"+str);

        }

        //@Test

        public void getInfo() throws Exception

        {

            //发起一个get请求，查看用户详情

            String str = mockMvc.perform(MockMvcRequestBuilders.get("/user/1")

                    .contentType(MediaType.APPLICATION_JSON_UTF8))

                    .andExpect(MockMvcResultMatchers.status().isOk())

                    .andExpect(MockMvcResultMatchers.jsonPath("$.username").value("Gary"))

                    .andReturn().getResponse().getContentAsString();

            System.out.println("查询复杂试图"+str);

        }

        //添加用户

        //@Test

        public void addUser() throws Exception

        {

            mockMvc.perform(MockMvcRequestBuilders.post("/user")

                    .contentType(MediaType.APPLICATION_JSON_UTF8)

                    .content("{\"username\":\"Gary\"}"))

                    .andExpect(MockMvcResultMatchers.status().isOk())

                    .andExpect(MockMvcResultMatchers.jsonPath("$.id").value("1"));

        }

        //修改用户

        @Test

        public void updataUser() throws Exception

        {

            mockMvc.perform(MockMvcRequestBuilders.put("/user/1")

                    .contentType(MediaType.APPLICATION_JSON_UTF8)

                    .content("{\"username\":\"Garyary\",\"id\":\"1\"}"))

            .andExpect(MockMvcResultMatchers.status().isOk())

            .andExpect(MockMvcResultMatchers.jsonPath("$.id").value("1"));

        }

}

MainController.java

package com.Gary.GaryRESTful.controller;

import java.util.ArrayList;

import java.util.List;

import org.junit.Test;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.PutMapping;

import org.springframework.web.bind.annotation.RequestBody;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.bind.annotation.RestController;

import com.Gary.GaryRESTful.dto.User;

import com.fasterxml.jackson.annotation.JsonView;

//表示这个Controller提供R二十天API

@RestController

public class UserController {

    @RequestMapping(value="/user",method = RequestMethod.GET)

    /*

     * default value     默认

     * name             请求的名字

     * required            是否是必须的,true

     * value            别名

     *

     * */

    @JsonView(User.UserSimpleView.class)

    public List<User> query(@RequestParam(name="username",required=false) String username)

    {

        System.out.println(username);

        //满足期望服务器返回json中的数组长度为3

        List<User> list = new ArrayList<>();

        list.add(new User());

        list.add(new User());

        list.add(new User());

        return list;

    }

    @RequestMapping(value="/user/{id}",method= RequestMethod.GET)

    //将@PathVariable路径中的片段映射到java代码中

    @JsonView(User.UserDetailView.class)

    public User getInfo(@PathVariable String id)

    {

        User user = new User();

        user.setUsername("Gary");

        return user;

    }

    @RequestMapping(value="/user",method= RequestMethod.POST)

    public User addUser(@RequestBody User user)

    {

        //传输json格式的时候，一定要记得加上@RequestBody注解

        //输出 null

        System.out.println(user.getPassword());

        //输出 Gary

        System.out.println(user.getUsername());

        user.setId("1");

        return user;

    }

    //修改用户资料

    @RequestMapping(value="/user/{id}",method = RequestMethod.PUT)

    public User updataUser(@RequestBody User user)

    {

        System.out.println(user.getId());

        System.out.println(user.getUsername());

        System.out.println(user.getPassword());

        return user;

    }

}

UserController.java

package com.Gary.GaryRESTful.dto;

import com.fasterxml.jackson.annotation.JsonView;

public class User {

    //简单试图 只有一个username

    public interface UserSimpleView{};

    //复杂试图 有username 和   password

    public interface UserDetailView extends UserSimpleView{};

    private String username;

    private String password;

    private String id;

    @JsonView(UserSimpleView.class)

    public String getId() {

        return id;

    }

    public void setId(String id) {

        this.id = id;

    }

    @JsonView(UserSimpleView.class)

    public String getUsername() {

        return username;

    }

    public void setUsername(String username) {

        this.username = username;

    }

    @JsonView(UserDetailView.class)

    public String getPassword() {

        return password;

    }

    public void setPassword(String password) {

        this.password = password;

    }

}

User.java

三、单元测试：删除用户

　　在MainController.java中添加deleteUser()修改用户的单元测试方法

        //删除用户

        @Test

        public void deleteUser() throws Exception

        {

            mockMvc.perform(MockMvcRequestBuilders.delete("/user/1")

                    .contentType(MediaType.APPLICATION_JSON_UTF8))

                    .andExpect(MockMvcResultMatchers.status().isOk());

        }

　　在UserController.java中接收来自deleteUser的请求

    @RequestMapping(value="/user/{id}",method = RequestMethod.DELETE)

    public User deleteUser(@PathVariable String id)

    {

        System.out.println(id);

        return null;

    }

package com.Gary.GaryRESTful;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication

public class GaryResTfulApplication {

    public static void main(String[] args) {

        SpringApplication.run(GaryResTfulApplication.class, args);

    }

}

GaryResTfulApplication.java

package com.Gary.GaryRESTful.controller;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

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

import org.springframework.boot.test.context.SpringBootTest;

import org.springframework.http.MediaType;

import org.springframework.test.context.junit4.SpringRunner;

import org.springframework.test.web.servlet.MockMvc;

import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;

import org.springframework.test.web.servlet.result.MockMvcResultMatchers;

import org.springframework.test.web.servlet.setup.MockMvcBuilders;

import org.springframework.web.context.WebApplicationContext;

//这是SpringBoot测试类

@RunWith(SpringRunner.class)

@SpringBootTest

public class MainController {

        @Autowired

        private WebApplicationContext webApplicationContext;

        //SpringMV单元测试独立测试类

        private MockMvc mockMvc;

        @Before

        public void before()

        {

            //创建独立测试类

            mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();

        }

        //@Test

        //查询user

        public void test() throws Exception

        {

            //发起一个Get请求

            String str = mockMvc.perform(MockMvcRequestBuilders.get("/user")

                    .param("username", "Gary")

                        //json的形式发送一个请求

                        .contentType(MediaType.APPLICATION_JSON_UTF8))

                        //期望服务器返回什么(期望返回的状态码为200)

                        .andExpect(MockMvcResultMatchers.status().isOk())

                        //期望服务器返回json中的数组长度为3

                        .andExpect(MockMvcResultMatchers.jsonPath("$.length()").value(3))

                        .andReturn().getResponse().getContentAsString();

            System.out.println("查询简单试图"+str);

        }

        //@Test

        public void getInfo() throws Exception

        {

            //发起一个get请求，查看用户详情

            String str = mockMvc.perform(MockMvcRequestBuilders.get("/user/1")

                    .contentType(MediaType.APPLICATION_JSON_UTF8))

                    .andExpect(MockMvcResultMatchers.status().isOk())

                    .andExpect(MockMvcResultMatchers.jsonPath("$.username").value("Gary"))

                    .andReturn().getResponse().getContentAsString();

            System.out.println("查询复杂试图"+str);

        }

        //添加用户

        //@Test

        public void addUser() throws Exception

        {

            mockMvc.perform(MockMvcRequestBuilders.post("/user")

                    .contentType(MediaType.APPLICATION_JSON_UTF8)

                    .content("{\"username\":\"Gary\"}"))

                    .andExpect(MockMvcResultMatchers.status().isOk())

                    .andExpect(MockMvcResultMatchers.jsonPath("$.id").value("1"));

        }

        //修改用户

        //@Test

        public void updataUser() throws Exception

        {

            mockMvc.perform(MockMvcRequestBuilders.put("/user/1")

                    .contentType(MediaType.APPLICATION_JSON_UTF8)

                    .content("{\"username\":\"Garyary\",\"id\":\"1\"}"))

            .andExpect(MockMvcResultMatchers.status().isOk())

            .andExpect(MockMvcResultMatchers.jsonPath("$.id").value("1"));

        }

        //删除用户

        @Test

        public void deleteUser() throws Exception

        {

            mockMvc.perform(MockMvcRequestBuilders.delete("/user/1")

                    .contentType(MediaType.APPLICATION_JSON_UTF8))

                    .andExpect(MockMvcResultMatchers.status().isOk());

        }

}

MainController.java

package com.Gary.GaryRESTful.controller;

import java.util.ArrayList;

import java.util.List;

import org.junit.Test;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.PutMapping;

import org.springframework.web.bind.annotation.RequestBody;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.bind.annotation.RestController;

import com.Gary.GaryRESTful.dto.User;

import com.fasterxml.jackson.annotation.JsonView;

//表示这个Controller提供R二十天API

@RestController

public class UserController {

    @RequestMapping(value="/user",method = RequestMethod.GET)

    /*

     * default value     默认

     * name             请求的名字

     * required            是否是必须的,true

     * value            别名

     *

     * */

    @JsonView(User.UserSimpleView.class)

    public List<User> query(@RequestParam(name="username",required=false) String username)

    {

        System.out.println(username);

        //满足期望服务器返回json中的数组长度为3

        List<User> list = new ArrayList<>();

        list.add(new User());

        list.add(new User());

        list.add(new User());

        return list;

    }

    @RequestMapping(value="/user/{id}",method= RequestMethod.GET)

    //将@PathVariable路径中的片段映射到java代码中

    @JsonView(User.UserDetailView.class)

    public User getInfo(@PathVariable String id)

    {

        User user = new User();

        user.setUsername("Gary");

        return user;

    }

    @RequestMapping(value="/user",method= RequestMethod.POST)

    public User addUser(@RequestBody User user)

    {

        //传输json格式的时候，一定要记得加上@RequestBody注解

        //输出 null

        System.out.println(user.getPassword());

        //输出 Gary

        System.out.println(user.getUsername());

        user.setId("1");

        return user;

    }

    //修改用户资料

    @RequestMapping(value="/user/{id}",method = RequestMethod.PUT)

    public User updataUser(@RequestBody User user)

    {

        System.out.println(user.getId());

        System.out.println(user.getUsername());

        System.out.println(user.getPassword());

        return user;

    }

    //删除

    @RequestMapping(value="/user/{id}",method = RequestMethod.DELETE)

    public User deleteUser(@PathVariable String id)

    {

        //输出删除的用户    可以查看JUnit中的状态吗

        System.out.println(id);

        return null;

    }

}

UserController.java

package com.Gary.GaryRESTful.dto;

import com.fasterxml.jackson.annotation.JsonView;

public class User {

    //简单试图 只有一个username

    public interface UserSimpleView{};

    //复杂试图 有username 和   password

    public interface UserDetailView extends UserSimpleView{};

    private String username;

    private String password;

    private String id;

    @JsonView(UserSimpleView.class)

    public String getId() {

        return id;

    }

    public void setId(String id) {

        this.id = id;

    }

    @JsonView(UserSimpleView.class)

    public String getUsername() {

        return username;

    }

    public void setUsername(String username) {

        this.username = username;

    }

    @JsonView(UserDetailView.class)

    public String getPassword() {

        return password;

    }

    public void setPassword(String password) {

        this.password = password;

    }

}

User.java

　　在UserController.java中通过@RequestMapping("/user")映射来处理所有user请求，使代码变得简介一些

package com.Gary.GaryRESTful.controller;

import java.util.ArrayList;

import java.util.List;

import org.junit.Test;

import org.springframework.web.bind.annotation.DeleteMapping;

import org.springframework.web.bind.annotation.GetMapping;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.PostMapping;

import org.springframework.web.bind.annotation.PutMapping;

import org.springframework.web.bind.annotation.RequestBody;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.bind.annotation.RestController;

import com.Gary.GaryRESTful.dto.User;

import com.fasterxml.jackson.annotation.JsonView;

//表示这个Controller提供R二十天API

@RestController

@RequestMapping("/user")

public class UserController {

    //@RequestMapping(value="/user",method = RequestMethod.GET)

    /*

     * default value     默认

     * name             请求的名字

     * required            是否是必须的,true

     * value            别名

     *

     * */

    @GetMapping

    @JsonView(User.UserSimpleView.class)

    public List<User> query(@RequestParam(name="username",required=false) String username)

    {

        System.out.println(username);

        //满足期望服务器返回json中的数组长度为3

        List<User> list = new ArrayList<>();

        list.add(new User());

        list.add(new User());

        list.add(new User());

        return list;

    }

    //@RequestMapping(value="/user/{id}",method= RequestMethod.GET)

    //将@PathVariable路径中的片段映射到java代码中

    @GetMapping("/{id}")

    @JsonView(User.UserDetailView.class)

    public User getInfo(@PathVariable String id)

    {

        User user = new User();

        user.setUsername("Gary");

        return user;

    }

    //添加用户

    //@RequestMapping(value="/user",method= RequestMethod.POST)

    @PostMapping

    public User addUser(@RequestBody User user)

    {

        //传输json格式的时候，一定要记得加上@RequestBody注解

        //输出 null

        System.out.println(user.getPassword());

        //输出 Gary

        System.out.println(user.getUsername());

        user.setId("1");

        return user;

    }

    //修改用户资料

    //@RequestMapping(value="/user/{id}",method = RequestMethod.PUT)

    @PutMapping("/{id}")

    public User updataUser(@RequestBody User user)

    {

        System.out.println(user.getId());

        System.out.println(user.getUsername());

        System.out.println(user.getPassword());

        return user;

    }

    //删除

    //@RequestMapping(value="/user/{id}",method = RequestMethod.DELETE)

    @DeleteMapping("/{id}")

    public User deleteUser(@PathVariable String id)

    {

        //输出删除的用户    可以查看JUnit中的状态吗

        System.out.println(id);

        return null;

    }

}

UserController.java

四、SpringBoot默认处理异常路径

　　在项目static->error目录下创建一个404.html，运行项目

<!DOCTYPE html>

<html>

<head>

<meta charset="UTF-8">

<title>404页面</title>

</head>

<body>

<h1>404错误，你的页面找不到了！！！</h1>

</body>

</html>

404.html