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

    　　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、实现一个成功的SpringMVC单元测试类

    　　　　二、RequestParam注解：

    　　　　三、JsonView注解

    　　创建SpringBoot项目　　传送门

    　　

    　　【 添加Spring Web Starter,Spring Data JPA,Spring Security,Thymeleaf,Spring Data Elasticsearch,Cloud OAuth2,Spring Session,MySQL Driver,H2 Database依赖】 

    一、实现一个成功的SpringMVC单元测试类

    　　在MainController.java中向服务器以Json格式发起一个请求，并反回两个期望

    　　期望一：期望服务器返回状态码为200

    　　期望二：期望服务器返回json中的数组长度为3

            @Test
        //查询user
        public void test() throws Exception
        {
            //发起一个Get请求
            mockMvc.perform(MockMvcRequestBuilders.get("/user")
                    //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));
            
        }

    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
            mockMvc.perform(MockMvcRequestBuilders.get("/user")
                    //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));
            
        }
        
}
    MainController.java
    package com.Gary.GaryRESTful.controller;

import java.util.ArrayList;
import java.util.List;

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

import com.Gary.GaryRESTful.dto.User;

//表示这个Controller提供R二十天API
@RestController
public class UserController {

    
    @RequestMapping(value="/user",method = RequestMethod.GET)
    public List<User> query()
    {
        //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;
    }
    
}
    UserController.java
    package com.Gary.GaryRESTful.dto;

public class User {


    private String username;
    private String 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;
    }
    
}
    User.java

    二、RequestParam注解：

    　　@RequestParam 获取请求参数的值

    　　在MainController.java中通过param方法给Get请求添加参数

            @Test
        //查询user
        public void test() throws Exception
        {
            //发起一个Get请求
            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));
            
        }

    　　在UserController.java中通过@RequestParam注入username参数，并通过System.out.println(username)输出username中的值

        @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
     * 
     * */
    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;
    }

    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
            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));
            
        }
        
}
    MainController.java
    package com.Gary.GaryRESTful.controller;

import java.util.ArrayList;
import java.util.List;

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;

//表示这个Controller提供R二十天API
@RestController
public class UserController {

    
    @RequestMapping(value="/user",method = RequestMethod.GET)
    public List<User> query(@RequestParam 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;
    }
    
    
    //@RequestParam
    
}
    UserController.java

    　　如果需要访问用户详细信息，在MainController.java中添加getInfo()方法，发起一个get请求去查看用户详情

            @Test
        public void getInfo() throws Exception
        {
            //发起一个get请求，查看用户详情
            mockMvc.perform(MockMvcRequestBuilders.get("/user/1")
                    .contentType(MediaType.APPLICATION_JSON_UTF8))
                    .andExpect(MockMvcResultMatchers.status().isOk())
                    .andExpect(MockMvcResultMatchers.jsonPath("$.username").value("Gary"));
        }

    　　在UserController.java中添加一个getInfo()方法，去接收该请求

        @RequestMapping(value="/user/{id}",method= RequestMethod.GET)
    //将@PathVariable路径中的片段映射到java代码中    
    public User getInfo(@PathVariable String id)
    {
        User user = new User();
        user.setUsername("Gary");
        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
            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));
            
        }
        
        @Test
        public void getInfo() throws Exception
        {
            //发起一个get请求，查看用户详情
            mockMvc.perform(MockMvcRequestBuilders.get("/user/1")
                    .contentType(MediaType.APPLICATION_JSON_UTF8))
                    .andExpect(MockMvcResultMatchers.status().isOk())
                    .andExpect(MockMvcResultMatchers.jsonPath("$.username").value("Gary"));
        }
}
    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.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;

//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
     * 
     * */
    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    
    public User getInfo(@PathVariable String id)
    {
        User user = new User();
        user.setUsername("Gary");
        return user;
    }
    
    
    
}
    UserController.java
    package com.Gary.GaryRESTful.dto;

public class User {


    private String username;
    private String 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;
    }
    
}
    User.java

    三、JsonView注解

    　　@JsonView是Jackson的一个注解，可以用来过滤序列化对象的字段属性，是你可以选择序列化对象哪些属性，哪些过滤掉。

    　　@JsonView使用步骤：

    　　　　1、使用接口来声明多个视图

    　　　　2、在值对象的get方法上指定视图

    　　　　3、在Controller方法上指定视图

    　　通过.andReturn().getResponse().getContentAsString()将mockMvc.perform(MockMvcRequestBuilders.get("/user/1")发送的get请求以字符串的格式打印出来

            @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(str);
                    
        }

    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
            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));
            
        }
        
        @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(str);
                    
        }
}
    MainController.java

    　　发现此时输出来的json字符串格式是{"username":"Gary","password":null}，但我们此时不希望用户看到password时，就可以用到@JsonView这个注解了

    　　使用接口声明多个视图

    　　　　1）username，password

    　　　　2）username

    　　在值对象的get方法中指定视图

    //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;
    
    @JsonView(UserSimpleView.class)
    public String getUsername() {
        return username;
    }
    
    @JsonView(UserDetailView.class)
    public String getPassword() {
        return password;
    }

    　　在controller方法中指定视图

    @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;
    }

    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);
                    
        }
}
    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.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;
    }
    
    
    
}
    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;
    
    @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
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  • 原文地址：https://www.cnblogs.com/1138720556Gary/p/11441219.html
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