ALiBABa fastjson去除JSON对象不需要的属性字段

引入包：

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import com.alibaba.fastjson.JSON;  

import com.alibaba.fastjson.JSONObject;  

TEST测试用例：

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@RunWith(SpringJUnit4ClassRunner.class)  

@ContextConfiguration(locations = "classpath:applicationContext.xml")  

public class JsonTest {  

  

        @Test  

    public void testJson()  

    {  

    /*  JSONObject json=new JSONObject(); 

        json.put("dd", "ss"); 

        json.put("mm", "ss"); 

        System.out.println("====1"+json.toJSONString());  

        json.remove("mm"); 

        System.out.println("====1"+json.toJSONString()); */  

          

        DataObject obj=new DataObject();  

        System.out.println(obj.toString());  

        JSONObject jsonObject=JSON.parseObject(obj.toString());  

        System.out.println("====all attributes:"+jsonObject.toJSONString());   

        jsonObject.remove("num1");  

        System.out.println("====remove num1"+jsonObject.toJSONString());   

        jsonObject.remove("num3");  

        System.out.println("====remove num3"+jsonObject.toJSONString());   

    }  

      

    public class DataObject implements Serializable  

    {  

        public int num1=0;  

        public int num2=0;  

        public double num3=0.0;  

        public double num4=0.0;  

        public int getNum1() {  

            return num1;  

        }  

        public void setNum1(int num1) {  

            this.num1 = num1;  

        }  

        public int getNum2() {  

            return num2;  

        }  

        public void setNum2(int num2) {  

            this.num2 = num2;  

        }  

        public double getNum3() {  

            return num3;  

        }  

        public void setNum3(double num3) {  

            this.num3 = num3;  

        }  

        public double getNum4() {  

            return num4;  

        }  

        public void setNum4(double num4) {  

            this.num4 = num4;  

        }  

        @Override  

        public String toString() {  

            String s="{";  

            s+="\"num1"+"\":"+"\""+num1+"\",";  

            s+="\"num2"+"\":"+"\""+num2+"\",";  

            s+="\"num3"+"\":"+"\""+num3+"\",";  

            s+="\"num4"+"\":"+"\""+num4+"\"";  

            s+="}";  

            return s;  

        }  

          

          

    }  

}  

就是一个JSONObject 的remove方法就搞定了。以下是测试结果：

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{"num1":"0","num2":"0","num3":"0.0","num4":"0.0"}  

====all attributes:{"num1":"0","num2":"0","num3":"0.0","num4":"0.0"}  

====remove num1{"num2":"0","num3":"0.0","num4":"0.0"}  

====remove num3{"num2":"0","num4":"0.0"}