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import cn.test.demo.base_demo.entity.po.User; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import java.util.ArrayList; import java.util.List; * @author 王杨帅 * @create 2018-05-05 22:02 * @desc 用户模块控制层 @RestController @RequestMapping(value = "/user" ) public class UserController { @GetMapping public List<User> queryList() { List <User> userList = new ArrayList<> (); userList.add( new User()); userList.add( new User()); userList.add( new User()); return userList; UserController.java

1.4 创建一个测试类

该测试类主要测试用户控制类中的相关方法

1.4.1 引入测试类注解以及日志注解

@RunWith(SpringRunner.class)
@SpringBootTest
@Slf4j

1.4.2 依赖注入WebApplicationContext

    @Autowired
    private WebApplicationContext wac;

1.4.3 实例化MockMvc

    private MockMvc mockMvc;
    @Before
    public void setup() {
        mockMvc = MockMvcBuilders.webAppContextSetup(wac).build();

    1.4.4 利用MockMvc对象模拟HTTP请求

    @Test
    public void queryList() throws Exception {
        String result = mockMvc.perform(
                    MockMvcRequestBuilders.get("/user")
                    .contentType(MediaType.APPLICATION_JSON_UTF8)
                .andExpect(MockMvcResultMatchers.status().isOk())
                .andReturn().getResponse().getContentAsString();
        log.info("===/" + className + "/queryList===" + result);

    1.4.5 测试类代码汇总

package cn.test.demo.base_demo.controller;
import lombok.extern.slf4j.Slf4j;
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.MockMvcBuilder;
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;
import static org.junit.Assert.*;
@RunWith(SpringRunner.class)
@SpringBootTest
@Slf4j
public class UserControllerTest {
    private final String className = getClass().getName();
    @Autowired
    private WebApplicationContext wac;
    private MockMvc mockMvc;
    @Before
    public void setup() {
        mockMvc = MockMvcBuilders.webAppContextSetup(wac).build();
    @Test
    public void queryList() throws Exception {
        String result = mockMvc.perform(
                    MockMvcRequestBuilders.get("/user")
                    .contentType(MediaType.APPLICATION_JSON_UTF8)
                .andExpect(MockMvcResultMatchers.status().isOk())
                .andReturn().getResponse().getContentAsString();
        log.info("===/" + className + "/queryList===" + result);
View Code

2 JsonPath

  JsonPath是GitHub上的一个开源项目,主要用来对Json格式的数据进行一些处理

  技巧:jsonPath是MockMvcResultMatchers中的一个静态方法

  具体使用:点击前往

  2.1 简单实例

    @Test
    public void test01() throws Exception {
        mockMvc.perform(
                        MockMvcRequestBuilders.get("/user")
                            .contentType(MediaType.APPLICATION_JSON_UTF8)
                .andExpect(MockMvcResultMatchers.status().isOk())
                .andExpect(MockMvcResultMatchers.jsonPath("$.length()").value(3));

3 请求参数

  3.1 PathVarible

    主要获取请求路径中的数据

    技巧01:PathVarible获取到的数据是请求路径的一部分

    技巧02:@PathVariable注解中的name和value两个成员的作用是一样的,是用来解决路径名和请求处理方法形参名不一致的问题

    技巧03:@PathVariable支持正则表达式,如果路径参数不满足正则表达式就会匹配失败;参考博文

// Source code recreated from a .class file by IntelliJ IDEA // (powered by Fernflower decompiler) package org.springframework.web.bind.annotation; import java.lang.annotation.Documented; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; import org.springframework.core.annotation.AliasFor; @Target({ElementType.PARAMETER}) @Retention(RetentionPolicy.RUNTIME) @Documented public @interface PathVariable { @AliasFor("name") String value() default ""; @AliasFor("value") String name() default ""; boolean required() default true; PathVariable.java

    3.1.1 控制类

package cn.test.demo.base_demo.controller;
import cn.test.demo.base_demo.entity.po.User;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.List;
 * @author 王杨帅
 * @create 2018-05-05 22:02
 * @desc 用户模块控制层
@RestController
@RequestMapping(value = "/user")
@Slf4j
public class UserController {
    private final String className = getClass().getName();
    @GetMapping
    public List<User> queryList() {
        List<User> userList = new ArrayList<>();
        userList.add(new User());
        userList.add(new User());
        userList.add(new User());
        return userList;
    @GetMapping(value = "/{id}")
    public User queryInfoByUserId(
            @PathVariable(name = "id") String userId
        System.out.println("===路径参数:" + userId);
//        log.info("===/" + className + "/queryInfoByUserId===路径参数为:{}", userId);
        User user = new User();
        return user;
UserController.java

    3.1.2 测试类

package cn.test.demo.base_demo.controller;
        import lombok.extern.slf4j.Slf4j;
        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.MockMvcBuilder;
        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;
        import static org.junit.Assert.*;
@RunWith(SpringRunner.class)
@SpringBootTest
@Slf4j
public class UserControllerTest {
    private final String className = getClass().getName();
    @Autowired
    private WebApplicationContext wac;
    private MockMvc mockMvc;
    @Before
    public void setup() {
        mockMvc = MockMvcBuilders.webAppContextSetup(wac).build();
    @Test
    public void queryList() throws Exception {
        String result = mockMvc.perform(
                MockMvcRequestBuilders.get("/user")
                        .contentType(MediaType.APPLICATION_JSON_UTF8)
                .andExpect(MockMvcResultMatchers.status().isOk())
                .andReturn().getResponse().getContentAsString();
        log.info("===/" + className + "/queryList===" + result);
     * 测试JosnPath
     * @throws Exception
    @Test
    public void test01() throws Exception {
        mockMvc.perform(
                        MockMvcRequestBuilders.get("/user")
                            .contentType(MediaType.APPLICATION_JSON_UTF8)
                .andExpect(MockMvcResultMatchers.status().isOk())
                .andExpect(MockMvcResultMatchers.jsonPath("$.length()").value(3));
     * 测试:路径参数
     * @throws Exception
    @Test
    public void test02() throws Exception {
        String result =  mockMvc.perform(
                        MockMvcRequestBuilders.get("/user/123")
                            .contentType(MediaType.APPLICATION_JSON_UTF8)
                .andExpect(MockMvcResultMatchers.status().isOk())
                .andReturn().getResponse().getContentAsString();
        System.out.println("====/" + result );
UserControllerTest.java

  3.2 RequestParam

    主要获取请求路径后面的 K-V 键值对

    技巧01:@RequestParam注解中的name和value属性的作用都是一样的,都是为了解决前端变量名和后台请求处理方法形参不一致的问题

    技巧02:@RequestParam 可以指定默认值(即:指定了默认之后,即使前端不传入参数也不会报400错误,而是采用设定的默认值)

// Source code recreated from a .class file by IntelliJ IDEA // (powered by Fernflower decompiler) package org.springframework.web.bind.annotation; import java.lang.annotation.Documented; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; import org.springframework.core.annotation.AliasFor; @Target({ElementType.PARAMETER}) @Retention(RetentionPolicy.RUNTIME) @Documented public @interface RequestParam { @AliasFor("name") String value() default ""; @AliasFor("value") String name() default ""; boolean required() default true; String defaultValue() default "\n\t\t\n\t\t\n\ue000\ue001\ue002\n\t\t\t\t\n"; RequestParam.java

    3.2.1 控制类

package cn.test.demo.base_demo.controller;
import cn.test.demo.base_demo.entity.po.User;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;
import java.util.ArrayList;
import java.util.List;
 * @author 王杨帅
 * @create 2018-05-05 22:02
 * @desc 用户模块控制层
@RestController
@RequestMapping(value = "/user")
@Slf4j
public class UserController {
    private final String className = getClass().getName();
    @GetMapping
    public List<User> queryList() {
        List<User> userList = new ArrayList<>();
        userList.add(new User());
        userList.add(new User());
        userList.add(new User());
        return userList;
     * 路径参数
     * @param userId
     * @return
    @GetMapping(value = "/{id}")
    public User queryInfoByUserId(
            @PathVariable(name = "id") String userId
        System.out.println("===路径参数:" + userId);
//        log.info("===/" + className + "/queryInfoByUserId===路径参数为:{}", userId);
        User user = new User();
        return user;
    @GetMapping(value = "/findByName")
    public void findByName(
            @RequestParam(value = "name") String username
        System.out.println("===请求参数为:/" + username);
UserController.java

    3.2.2 测试类

package cn.test.demo.base_demo.controller;
        import lombok.extern.slf4j.Slf4j;
        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.MockMvcBuilder;
        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;
        import static org.junit.Assert.*;
@RunWith(SpringRunner.class)
@SpringBootTest
@Slf4j
public class UserControllerTest {
    private final String className = getClass().getName();
    @Autowired
    private WebApplicationContext wac;
    private MockMvc mockMvc;
    @Before
    public void setup() {
        mockMvc = MockMvcBuilders.webAppContextSetup(wac).build();
    @Test
    public void queryList() throws Exception {
        String result = mockMvc.perform(
                MockMvcRequestBuilders.get("/user")
                        .contentType(MediaType.APPLICATION_JSON_UTF8)
                .andExpect(MockMvcResultMatchers.status().isOk())
                .andReturn().getResponse().getContentAsString();
        log.info("===/" + className + "/queryList===" + result);
     * 测试JosnPath
     * @throws Exception
    @Test
    public void test01() throws Exception {
        mockMvc.perform(
                        MockMvcRequestBuilders.get("/user")
                            .contentType(MediaType.APPLICATION_JSON_UTF8)
                .andExpect(MockMvcResultMatchers.status().isOk())
                .andExpect(MockMvcResultMatchers.jsonPath("$.length()").value(3));
     * 测试:路径参数
     * @throws Exception
    @Test
    public void test02() throws Exception {
        String result =  mockMvc.perform(
                        MockMvcRequestBuilders.get("/user/123")
                            .contentType(MediaType.APPLICATION_JSON_UTF8)
                .andExpect(MockMvcResultMatchers.status().isOk())
                .andReturn().getResponse().getContentAsString();
        System.out.println("====/" + result );
    @Test
    public void test03() throws Exception {
        mockMvc.perform(
                    MockMvcRequestBuilders.get("/user/findByName")
                            .param("username", "王杨帅")
                            .contentType(MediaType.APPLICATION_JSON_UTF8)
                .andExpect(MockMvcResultMatchers.status().isOk());
UserControllerTest.java

  3.3 RequestBody

    可以将前端参数封装成一个对象传到后台

    技巧01:请求体中的数据会自动转化成字符串进行传输

    3.3.1 新建一个数据传输类

      该类主要用于整合前端传过来的数据

package cn.test.demo.base_demo.entity.dto;
public class UserQueryCondition {
    private String username;
    private Integer age;
    private Integer ageTo;
    private String xxx;
    public String getUsername() {
        return username;
    public void setUsername(String username) {
        this.username = username;
    public Integer getAge() {
        return age;
    public void setAge(Integer age) {
        this.age = age;
    public Integer getAgeTo() {
        return ageTo;
    public void setAgeTo(Integer ageTo) {
        this.ageTo = ageTo;
    public String getXxx() {
        return xxx;
    public void setXxx(String xxx) {
        this.xxx = xxx;
    @Override
    public String toString() {
        return "UserQueryCondition [username=" + username + ", age=" + age + ", ageTo=" + ageTo + ", xxx=" + xxx + "]";
UserQueryCondition.java

    3.3.2 控制类

package cn.test.demo.base_demo.controller;
import cn.test.demo.base_demo.entity.dto.UserQueryCondition;
import cn.test.demo.base_demo.entity.po.User;
import com.fasterxml.jackson.annotation.JsonView;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;
import java.util.ArrayList;
import java.util.List;
 * @author 王杨帅
 * @create 2018-05-05 22:02
 * @desc 用户模块控制层
@RestController
@RequestMapping(value = "/user")
@Slf4j
public class UserController {
    private final String className = getClass().getName();
    @GetMapping
    @JsonView(value = User.UserSimple.class)
    public List<User> queryList() {
        List<User> userList = new ArrayList<>();
        userList.add(new User());
        userList.add(new User());
        userList.add(new User());
        return userList;
     * 路径参数
     * @param userId
     * @return
    @GetMapping(value = "/{id}")
    public User queryInfoByUserId(
            @PathVariable(name = "id") String userId
        System.out.println("===路径参数:" + userId);
//        log.info("===/" + className + "/queryInfoByUserId===路径参数为:{}", userId);
        User user = new User();
        return user;
     * 请求参数
     * @param username
    @GetMapping(value = "/findByName")
    public void findByName(
            @RequestParam(value = "name") String username
        System.out.println("===请求参数为:/" + username);
     * 请求体
     * @param userQueryCondition
    @PostMapping()
    public void create(
            @RequestBody UserQueryCondition userQueryCondition
        System.out.println("===前端获取到的数据为:" + userQueryCondition);
UserController.java

    3.3.3 测试类

package cn.test.demo.base_demo.controller;
        import lombok.extern.slf4j.Slf4j;
        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.MockMvcBuilder;
        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;
        import static org.junit.Assert.*;
@RunWith(SpringRunner.class)
@SpringBootTest
@Slf4j
public class UserControllerTest {
    private final String className = getClass().getName();
    @Autowired
    private WebApplicationContext wac;
    private MockMvc mockMvc;
    @Before
    public void setup() {
        mockMvc = MockMvcBuilders.webAppContextSetup(wac).build();
    @Test
    public void queryList() throws Exception {
        String result = mockMvc.perform(
                MockMvcRequestBuilders.get("/user")
                        .contentType(MediaType.APPLICATION_JSON_UTF8)
                .andExpect(MockMvcResultMatchers.status().isOk())
                .andReturn().getResponse().getContentAsString();
//        log.info("===/" + className + "/queryList===" + result);
        System.out.println("===/结果为:" + result);
     * 测试JosnPath
     * @throws Exception
    @Test
    public void test01() throws Exception {
        mockMvc.perform(
                        MockMvcRequestBuilders.get("/user")
                            .contentType(MediaType.APPLICATION_JSON_UTF8)
                .andExpect(MockMvcResultMatchers.status().isOk())
                .andExpect(MockMvcResultMatchers.jsonPath("$.length()").value(3));
     * 测试:路径参数
     * @throws Exception
    @Test
    public void test02() throws Exception {
        String result =  mockMvc.perform(
                        MockMvcRequestBuilders.get("/user/123")
                            .contentType(MediaType.APPLICATION_JSON_UTF8)
                .andExpect(MockMvcResultMatchers.status().isOk())
                .andReturn().getResponse().getContentAsString();
        System.out.println("====/" + result );
     * 测试:请求参数
     * @throws Exception
    @Test
    public void test03() throws Exception {
        mockMvc.perform(
                    MockMvcRequestBuilders.get("/user/findByName")
                            .param("name", "王杨帅")
                            .contentType(MediaType.APPLICATION_JSON_UTF8)
                .andExpect(MockMvcResultMatchers.status().isOk());
    @Test
    public void test04() throws Exception {
        String content = "{\"username\":\"王杨帅\",\"age\":\"24\"}";
        mockMvc.perform(
                    MockMvcRequestBuilders.post("/user")
                            .content(content)
                            .contentType(MediaType.APPLICATION_JSON_UTF8)
                .andExpect(MockMvcResultMatchers.status().isOk());
UserControllerTest.java

    3.3.4 参数验证

      参考博文:点击前往

 4 JsonView

  需求:有的请求需要返回一个实体对象的全部字段,而有的请求只需要返回一个实体对象的部分字段;但是两个请求的数据都来自同一个实体类,怎么样才可以避免实体类重复定义

  JsonView可以通过一个实体类实现多种视图显示

  4.1 声明多个视图

    在一个实体类中利用接口实现声明多个视图

    技巧01:视图之间可以继承,如果视图A继承了视图B,那么在利用视图A进行显示时视图B对应的字段也会被显示出来

  4.2 设置实例属性

    在实例变量的Get方法上设置视图

package cn.test.demo.base_demo.entity.po;
import com.fasterxml.jackson.annotation.JsonView;
import java.util.Date;
 * @author 王杨帅
 * @create 2018-05-05 22:03
 * @desc 用户实体类
public class User {
    public interface UserSimple {};
    public interface UserDetail extends UserSimple {};
    private Integer userId;
    private String userName;
    private String password;
    private Date birthday;
    @JsonView(value = UserSimple.class)
    public Integer getUserId() {
        return userId;
    public void setUserId(Integer userId) {
        this.userId = userId;
    @JsonView(value = UserSimple.class)
    public String getUserName() {
        return userName;
    public void setUserName(String userName) {
        this.userName = userName;
    @JsonView(value = UserDetail.class)
    public String getPassword() {
        return password;
    public void setPassword(String password) {
        this.password = password;
    @JsonView(value = UserDetail.class)
    public Date getBirthday() {
        return birthday;
    public void setBirthday(Date birthday) {
        this.birthday = birthday;
User.java

  4.3 设置响应视图

    在控制类中方法中设置响应视图

package cn.test.demo.base_demo.controller;
import cn.test.demo.base_demo.entity.po.User;
import com.fasterxml.jackson.annotation.JsonView;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;
import java.util.ArrayList;
import java.util.List;
 * @author 王杨帅
 * @create 2018-05-05 22:02
 * @desc 用户模块控制层
@RestController
@RequestMapping(value = "/user")
@Slf4j
public class UserController {
    private final String className = getClass().getName();
    @GetMapping
    @JsonView(value = User.UserSimple.class)
    public List<User> queryList() {
        List<User> userList = new ArrayList<>();
        userList.add(new User());
        userList.add(new User());
        userList.add(new User());
        return userList;
     * 路径参数
     * @param userId
     * @return
    @GetMapping(value = "/{id}")
    public User queryInfoByUserId(
            @PathVariable(name = "id") String userId
        System.out.println("===路径参数:" + userId);
//        log.info("===/" + className + "/queryInfoByUserId===路径参数为:{}", userId);
        User user = new User();
        return user;
    @GetMapping(value = "/findByName")
    public void findByName(
            @RequestParam(value = "name") String username
        System.out.println("===请求参数为:/" + username);
UserController.java

5 分页查询参数

  5.1 控制方法形参类型

    在controller层的控制方法中利用 Pageable 对象去接收前端传过来的路径参数

    技巧01:在springBoot项目中需要引入 spring-boot-starter-data-jpa 相关jar包才可以使用 Pageable 去接收分页查询参数

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

    技巧02:Pageable 所在的包名为:import org.springframework.data.domain.Pageable;

    技巧03:如果前端没有传入先关的参数,Pageable 是有默认值的,即使不用 @PageableDefault 指定默认值也是可以的(如果不指定:默认页码为第一页,默认每页记录数为20)

    技巧04:Pagealbe 可以利用 @PageableDefault 设置默认值(即:前端不传入任何参数,直接使用开发者指定的数值),例如:

@PageableDefault(size = 14, page = 14, sort = "username", direction = Direction.DESC) Pageable pageable

  5.2 前端传参

    在前端直接在请求路径中利用 k-v 键值对传入即可,形如

    技巧01:分页查询的参数变量必须是page、size、sort,分别代表页码、每页记录数、排序字段及其升降序;前端传入这三个参数,后台会自动封装到 Pageable 对象中

http://127.0.0.1:9999/test/page?page=12&size=23&sort=name,asc

     疑惑01:后台明明时利用 Pageable 去接收前端的参数,为什么打印出来的日志信息却是一个 Page 对象;(理解:SpringMVC框架对Pageable进行了一次封装)

  5.3 SpringJPA 中有直接进行分页查询的接口

    参考文档:点击前往

6  JsonProperty

6.1 需求

  当后台响应实体类的变量名和前台的需要的不一致时该如何解决;前端需要按照前端的变量规则来传,后端按照后端的变量规则来传,如何保证前后端的数据对应;例如:

  》前端要求的对象格式

  》后端要求的对象格式

6.2 解决办法

  在定义后端的实体对象时利用 @JsonProperty 指定前端的变量名,例如:

package cn.xiangxu.product.VO;
import com.fasterxml.jackson.annotation.JsonProperty;
import lombok.Data;
import javax.persistence.Column;
import java.util.List;
 * @author 王杨帅
 * @create 2018-07-23 14:22
 * @desc 商品类型视图
@Data
public class CategoryVO {
     * 类目名字
    @JsonProperty(value = "name")
    private String categoryName;
     * 类目编号
    @JsonProperty(value = "type")
    private Integer categoryType;
    /** 商品视图列表 */
    @JsonProperty(value = "foods")
    private List<ProductVO> productVOList;
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  6.3 测试

    6.3.1 准备

      》创建一个SpringBoot项目,并引入lombok、spring-boot-starter-web依赖

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--日志、get\set\toString satrt-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <!--<version>1.18.0</version>-->
            <!--<scope>provided</scope>-->
        </dependency>
        <!--日志、get\set\toString end-->
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      》编写视图类和视图类工具

        》》响应视图类

          技巧01:@Data注解的目的是自动生成get\set\toString等方法

          坑01:利用IDEA开发时就算引入了lombok依赖,也在相关类中添加了@Data注解,但是启动应用时会报错;因为lombok会在应用打包时自动给我们生成相关方法,直接利用IDEA启动应用时那些方法还没有生成,所以会报错;解决办法是在IDEA中安装一个lombok插件

package cn.xiangxu.product.VO;
import lombok.Data;
 * @author 王杨帅
 * @create 2018-07-23 13:58
 * @desc 数据封装视图
@Data
public class ResultVO<T> {
    private Integer code;
    private String msg;
    private T data;
ResultVO

        》》响应视图类工具

package cn.xiangxu.product.utils;
import cn.xiangxu.product.VO.ResultVO;
 * @author 王杨帅
 * @create 2018-07-23 14:06
 * @desc 响应视图工具类
public class ResultVoUtil {
    public static ResultVO success(Object data) {
        ResultVO resultVO = new ResultVO();
        resultVO.setCode(0);
        resultVO.setMsg("请求成功");
        resultVO.setData(data);
        return resultVO;
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        》》数据视图类

package cn.xiangxu.product.VO;
import com.fasterxml.jackson.annotation.JsonProperty;
import lombok.Data;
import javax.persistence.Column;
import java.util.List;
 * @author 王杨帅
 * @create 2018-07-23 14:22
 * @desc 商品类型视图
@Data
public class CategoryVO {
     * 类目名字
    @JsonProperty(value = "name")
    private String categoryName;
     * 类目编号
    @JsonProperty(value = "type")
    private Integer categoryType;
    /** 商品视图列表 */
    @JsonProperty(value = "foods")
    private List<ProductVO> productVOList;
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    6.3.2 测试Get请求

    6.3.3 测试POST请求

    6.3.4 代码汇总

package cn.xiangxu.product.controller;
import cn.xiangxu.product.VO.CategoryVO;
import cn.xiangxu.product.VO.ResultVO;
import cn.xiangxu.product.utils.ResultVoUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;
 * @author 王杨帅
 * @create 2018-07-23 15:51
 * @desc 测试控制层
@RestController
@RequestMapping(value = "/test")
@Slf4j
public class TestController {
    @GetMapping(value = "/connect")
    public ResultVO connect() {
        String result = "前后台连接成功";
        log.info(result);
        return ResultVoUtil.success(result);
    @GetMapping(value = "/test01")
    public ResultVO test01() {
        CategoryVO categoryVO = new CategoryVO();
        categoryVO.setCategoryName("熟食");
        categoryVO.setCategoryType(2);
        categoryVO.setProductVOList(null);
        return ResultVoUtil.success(categoryVO);
    @PostMapping(value = "/test02")
    public ResultVO test02(
            @RequestBody CategoryVO categoryVO
        log.info("前端传过来的参数信息为:" + categoryVO);
        return ResultVoUtil.success(categoryVO);
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