@JsonView注解指定返回的model类中显示的字段

1、User类

package com.imooc.model;

import com.fasterxml.jackson.annotation.JsonView;

/**
 * @author oy
 * @date 2019年6月22日 下午10:42:03
 * @version 1.0.0
 */
public class User {
    public interface UserSimpleView {};
    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;
    }
}

2、IndexController

package com.imooc.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import com.fasterxml.jackson.annotation.JsonView;
import com.imooc.model.User;
import com.imooc.model.User.UserSimpleView;
import com.imooc.service.UserService;

/**
 * @author oy
 * @date 2019年6月22日 下午10:17:37
 * @version 1.0.0
 */
@RestController
public class IndexController {
    @Autowired
    private UserService userService;

    @JsonView(UserSimpleView.class)
    @GetMapping("/user")
    public List<User> getUsers() {
        return userService.getUsers();
    }
}

3、测试用例

package com.imooc.controller;

import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

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.setup.MockMvcBuilders;
import org.springframework.web.context.WebApplicationContext;

/**
 * @author oy
 * @date 2019年6月22日 下午11:14:56
 * @version 1.0.0
 */
@RunWith(SpringRunner.class)
@SpringBootTest
public class IndexControllerTest {

    @Autowired
    private WebApplicationContext wac;

    private MockMvc mocMvc;

    @Before
    public void setUp() throws Exception {
        mocMvc = MockMvcBuilders.webAppContextSetup(wac).build();
    }

    @Test
    public void testGetUsers() throws Exception {
        String mvcResult = mocMvc.perform(get("/user")
                .contentType(MediaType.APPLICATION_FORM_URLENCODED))
                .andDo(print()) // 打印信息
                .andExpect(status().isOk()) // 期望返回的状态码为200
                .andReturn().getResponse().getContentAsString();

        System.out.println("mvcResult: " + mvcResult);
        //mvcResult: [{"username":"张三","password":"123"},{"username":"李四","password":"123"}]
        //@JsonView(UserSimpleView.class) ==> mvcResult: [{"username":"张三"},{"username":"李四"}]
    }
}

　　

　　当IndexController#getUsers()方法加上注解@JsonView(UserSimpleView.class)后，测试打印结果：mvcResult: [{"username":"张三"},{"username":"李四"}],

　　当IndexController#getUsers()方法加上注解@JsonView(UserDetailView.class)后，测试打印结果：mvcResult: [{"username":"张三","password":"123"},{"username":"李四","password":"123"}]