JSON.toJSONString（Object object,SerializerFeature...features）详解

D

package myProject;

import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.serializer.SerializerFeature;

public class FastJsonTest {
    
    private int a;
    private BigDecimal b;
    private String c;
    private List<Student> list;
    

    public String getC() {
        return c;
    }


    public void setC(String c) {
        this.c = c;
    }


    public int getA() {
        return a;
    }


    public void setA(int a) {
        this.a = a;
    }


    public BigDecimal getB() {
        return b;
    }


    public void setB(BigDecimal b) {
        this.b = b;
    }


    public List<Student> getList() {
        return list;
    }


    public void setList(List<Student> list) {
        this.list = list;
    }


    public static void main(String[] args) {
        FastJsonTest f=new FastJsonTest();
        String json1=JSON.toJSONString(f);
        String json2=JSON.toJSONString(f,SerializerFeature.WriteMapNullValue,SerializerFeature.WriteNullListAsEmpty,SerializerFeature.WriteNullStringAsEmpty,SerializerFeature.WriteNullNumberAsZero);
        System.out.println("json1"+json1);
        System.out.println("json2"+json2);
        
    }
}

输出结果为：

json1{"a":0}
json2{"a":0,"b":0,"c":"","list":[]}

可见，BigDecimal类型，String类型，List类型在不添加对应参数，都不会显示出来。