SpringBoot之返回json数据的实现方法

/**

  * created by cr7 on 2017-8-18 返回json数据实体类

  */

public class user {

   private int id;

   private string username;

   private string password;

   public string getpassword() {

     return password;

   }

   public void setpassword(string password) {

     this .password = password;

   }

   public string getusername() {

     return username;

   }

   public void setusername(string username) {

     this .username = username;

   }

   public int getid() {

     return id;

   }

   public void setid( int id) {

     this .id = id;

   }

}

import com.example.bean.user;

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

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

/**

  * created by cr7 on 2017-8-18 json返回数据的controller

  */

@restcontroller

@requestmapping ( "user" ) 

public class returnjsoncontroller {

   @requestmapping ( "getuser" )

   public user getuser(){

     user user = new user();

     user.setid( 1 );

     user.setusername( "zhanghaoliang" );

     user.setpassword( "1231" );

     return user;

   }

}

package com.example.demo;

import com.example.bean.user;

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

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

import java.util.arraylist;

import java.util.list;

/**

  * created by cr7 on 2017-8-18 json返回数据的controller

  */

@restcontroller

@requestmapping ( "user" )

public class returnjsoncontroller {

   @requestmapping ( "getuserlist" )

   public list<user> getuserlist(){

     user user1 = new user();

     user1.setid( 1 );

     user1.setusername( "zhanghaoliang" );

     user1.setpassword( "123" );

     user user2 = new user();

     user2.setid( 2 );

     user2.setusername( "chensi" );

     user2.setpassword( "456" );

     user user3 = new user();

     user3.setid( 3 );

     user3.setusername( "doudou" );

     user3.setpassword( "789" );

     list<user> list = new arraylist<>();

     list.add(user1);

     list.add(user2);

     list.add(user3);

     return list;

   }

}

package com.example.demo;

import com.example.bean.user;

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

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

import java.util.arraylist;

import java.util.hashmap;

import java.util.list;

import java.util.map;

/**

  * created by cr7 on 2017-8-18 json返回数据的controller

  */

@restcontroller

@requestmapping ( "user" )

public class returnjsoncontroller {

   @requestmapping ( "getusermap" )

   public map<string,user> getusermap(){

     user user1 = new user();

     user1.setid( 1 );

     user1.setusername( "zhanghaoliang" );

     user1.setpassword( "123" );

     user user2 = new user();

     user2.setid( 2 );

     user2.setusername( "chensi" );

     user2.setpassword( "456" );

     user user3 = new user();

     user3.setid( 3 );

     user3.setusername( "doudou" );

     user3.setpassword( "789" );

     map<string,user> map = new hashmap<>();

     map.put( "user1" ,user1);

     map.put( "user2" ,user2);

     map.put( "user3" ,user3);

     return map;

   }

}