本篇文章將介紹如何jackjson的JsonView註解定義多個檢視，在springmvc的返回值中返回特定的檢視

在pojo上定義多個檢視

import com.fasterxml.jackson.annotation.JsonView;
import org.hibernate.validator.constraints.*;

import javax.validation.constraints.*;
import java.util.Date;

/**
 * 使用jsonView和介面來宣告多個檢視
 * 這個pojo上定義了兩個檢視一個是SimpleView，一個是DetailView，
 * SimpleView檢視中只有一個name,DetailView繼承自SimpleView,所以他擁有
 * Simpleiew的所有屬性
 */
 

public class User {


  public  interface SimpleView{};
  public interface DetailView extends SimpleView{};

  @JsonView(SimpleView.class)
  private String name;

  @JsonView(DetailView.class)
  private String password;

  private Date birthday;

  public User() {
  }

  public User(String name) {
    this
 
.name = name;
  }

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public String getPassword() {
    return password;
  }

  public void setPassword(String password) {
    this.password = password;
  }
  public Date getBirthday() {
    return
 
 birthday;
  }

  public void setBirthday(Date birthday) {
    this.birthday = birthday;
  }
}

在SpringMvc的方法之上指明使用哪個檢視，如果不指明使用的檢視的話返回值將顯示所有的欄位

import com.fasterxml.jackson.annotation.JsonView;
import com.micro.fast.security.demo.pojo.User;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.*;

import javax.validation.Valid;
import java.util.ArrayList;
import java.util.List;

@RestController
@RequestMapping("/user")
public class RestfulController {

  @GetMapping
  @JsonView(User.SimpleView.class)//指明使用那個檢視
  public List<User> query(@RequestParam("username") String username){
    List<User> users = new ArrayList<>();
    users.add(new User("name"));
    users.add(new User("name"));
    users.add(new User("name"));
    return users;
  }
}