fastjson小小用法

 

除了下列之外，补一条参考网址：https://segmentfault.com/a/1190000011212806

使用介绍：
Fastjson的最主要的使用入口是com.alibaba.fastjson.JSON

import com.alibaba.fastjson.JSON;

public static final Object parse(String text); // 把JSON文本parse为JSONObject或者JSONArray
public static final JSONObject parseObject(String text)； // 把JSON文本parse成JSONObject
public static final <T> T parseObject(String text, Class<T> clazz); // 把JSON文本parse为JavaBean
public static final JSONArray parseArray(String text); // 把JSON文本parse成JSONArray
public static final <T> List<T> parseArray(String text, Class<T> clazz); //把JSON文本parse成JavaBean集合
public static final String toJSONString(Object object); // 将JavaBean序列化为JSON文本
public static final String toJSONString(Object object, boolean prettyFormat); // 将JavaBean序列化为带格式的JSON文本
public static final Object toJSON(Object javaObject); 将JavaBean转换为JSONObject或者JSONArray。

import java.util.ArrayList;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.TypeReference;


public class MyJson {

public static void main(String[] args) {

List<Student> list=new ArrayList<>();
Student student=new Student("bob",24);
Student student12=new Student("lily", 23);
list.add(student);
list.add(student12);
System.out.println("*******javaBean to jsonString*******");
String str1=JSON.toJSONString(student);
System.out.println(str1);
System.out.println(JSON.toJSONString(list));
System.out.println();

System.out.println("******jsonString to javaBean*******");
//Student stu1=JSON.parseObject(str1,new TypeReference<Student>(){});
Student stu1=JSON.parseObject(str1,Student.class);
System.out.println(stu1);
System.out.println();

System.out.println("******javaBean to jsonObject******");
JSONObject jsonObject1=(JSONObject)JSON.toJSON(student);
System.out.println(jsonObject1.getString("name"));
System.out.println();

System.out.println("******jsonObject to javaBean******");
Student student2=JSON.toJavaObject(jsonObject1, Student.class);
System.out.println(student2);
System.out.println();

System.out.println("*******javaBean to jsonArray******");
List<Student> stulist=new ArrayList<>();
for(int i=0;i<5;i++){
stulist.add(new Student("student"+i, i));

}
JSONArray jsonArrays=(JSONArray)JSON.toJSON(stulist);
for(int i=0;i<jsonArrays.size();i++){
System.out.println(jsonArrays.getJSONObject(i));
}
System.out.println();

System.out.println("*****jsonArry to javalist******");
List<Student> myList=new ArrayList<>();
for(int i=0;i<jsonArrays.size();i++){

Student student3=JSON.toJavaObject(jsonArrays.getJSONObject(i), Student.class);
myList.add(student3);
}
for(Student stu:myList){
System.out.println(stu);
}

System.out.println();

System.out.println("*****jsonObject to jsonString*****");
String str4=JSON.toJSONString(jsonObject1);
System.out.println(str4);
System.out.println();

System.out.println("*******jsonString to jsonObject*****");
JSONObject jso1=JSON.parseObject(str1);
System.out.println(jso1.getString("name"));
System.out.println();

System.out.println("*****jsonString to jsonArray*****");
JSONArray jArray=JSON.parseArray(JSON.toJSONString(stulist));
for(int i=0;i<jArray.size();i++){
System.out.println(jArray.getJSONObject(i));
}
System.out.println();
}

}
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作者：名字真难娶
来源：CSDN
原文：https://blog.csdn.net/srj1095530512/article/details/82529759