JsonTools.java
package com.lihua.json.tools;
import net.sf.json.JSONObject;
public class JsonTools {
public JsonTools() {
}
/**
* @param key
* 表示json字符串的头信息
* @param value
* 是对解析的集合的类型
* @return
*/
//将数据转换为Json
public static String createJsonString(String key, Object value) {
JSONObject jsonObject = new JSONObject();
jsonObject.put(key, value);
return jsonObject.toString();
}
}
Person.java:
package com.lihua.json.domain;
public class Person {
private int id;
private String name;
private String address;
public Person() {
}
public Person(int id, String name, String address) {
super();
this.id = id;
this.name = name;
this.address = address;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
//重写toString()方法
@Override
public String toString() {
return "Person [id=" + id + ", name=" + name + ", address=" + address
+ "]";
}
}
JsonService.java :
package com.lihua.json.service;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.lihua.json.domain.Person;
public class JsonService {
public JsonService() {
}
//声明一个Person类型的方法,并为其添加单个对象
public Person getPerson() {
Person person = new Person(1001,"jack","beijing");
return person;
}
//声明一个List<Person>类型的方法,并为其添加多个对象
public List<Person> getlistPerson() {
List<Person> list = new ArrayList<Person>();
Person person1 = new Person(100,"jack","广东");
Person person2 = new Person(101,"rose","广西");
list.add(person1);
list.add(person2);
return list;
}
//声明一个List<String>类型的方法,并为其添加单个对象
public List<String> getlistString() {
List<String> list = new ArrayList<String>();
list.add("北京");
list.add("上海");
list.add("广东");
list.add("广西");
return list;
}
//声明一个List<Map<String,Object>>类型的方法,并为其添加多个对象
public List<Map<String,Object>> getListMap() {
List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();
Map<String,Object> map1 = new HashMap<String,Object>();
map1.put("id", 100);
map1.put("name", "jack");
map1.put("address", "北京");
Map<String,Object> map2 = new HashMap<String,Object>();
map2.put("id", 100);
map2.put("name", "rose");
map2.put("address", "上海");
list.add(map1);
list.add(map2);
return list;
}
}
Test.java :
package com.lihua.json.test;
import java.util.List;
import java.util.Map;
import com.lihua.json.domain.Person;
import com.lihua.json.service.JsonService;
import com.lihua.json.tools.JsonTools;
public class Test {
public Test() {
}
public static void main(String[] args) {
String msg = "";
//new一个JsonService对象
JsonService service = new JsonService();
//声明一个Person对象,并取得person对象中的数据
Person person = service.getPerson();
//将person对象中的数据转换为json数据,并保存到msg中
msg = JsonTools.createJsonString("person", person);
System.out.println("---->"+msg);
List<Person> list = service.getlistPerson();
msg = JsonTools.createJsonString("person", list);
System.out.println("---->"+msg);
List<Map<String, Object>> listmap = service.getListMap();
msg = JsonTools.createJsonString("person", listmap);
System.out.println("---->"+msg);
}
}
运行结果: