fastjson简单的应用

最新推荐文章于 2021-08-26 23:18:13 发布

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#字符串 #json

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本文通过实例演示了如何使用FastJSON实现JavaBean、JSON及字符串之间的相互转换，并提供了详细的代码样例。

1前言： fastjson作为阿里巴巴的开源框架，速度真快，真好用，但是在json，字符串，javaBean之间进行互相转换的时候经常很迷，不知道你们怎么样，反正我这样，这次简单梳理一下

2开干

先模拟一下数据

  Model model = new Model();
        model.setName("李园松");
        model.setPassword("0987");
        ArrayList<Integer> list = new ArrayList<>();
        list.add(1);
        list.add(2);
        model.setList(list);
        model.setNoName(new NoName("秦威",666));
        System.out.println("model = " + model);
        //model = Model(name=李园松, password=0987, list=[1, 2], noName=NoName(img=秦威, num=666))

2.1 javaBean转字符串，json

javabean转字符串

 String str = JSONObject.toJSONString(model);
        System.out.println("str = " + str);
        //str = {"list":[1,2],"name":"李园松","noName":{"img":"秦威","num":666},"password":"0987"}

javabean转json

JSONObject o1 = (JSONObject)JSONObject.toJSON(model);
        System.out.println("o1 = " + o1);
        //o1 = {"password":"0987","name":"李园松","noName":{"img":"秦威","num":666},"list":[1,2]}

2.2 字符串转javaBean，json

字符串转Javabean

 Model o = JSONObject.parseObject(str, Model.class);
        System.out.println("o = " + o);
        //o = Model(name=李园松, password=0987, list=[1, 2], noName=NoName(img=秦威, num=666))

字符串转json

  JSONObject jsonObject = JSONObject.parseObject(str);
        System.out.println("jsonObject = " + jsonObject);
        //jsonObject = {"password":"0987","name":"李园松","noName":{"img":"秦威","num":666},"list":[1,2]}

2.3 json转javaBean，字符串

json转javaBean

 Model model1 = JSONObject.toJavaObject(jsonObject, Model.class);
        System.out.println("model1 = " + model1);
        //model1 = Model(name=李园松, password=0987, list=[1, 2], noName=NoName(img=秦威, num=666))

json转字符串

String s = JSONObject.toJSONString(jsonObject);
        System.out.println("s = " + s);
        //s = {"password":"0987","name":"李园松","noName":{"img":"秦威","num":666},"list":[1,2]}

        //或者

        String s1 = JSONObject.toJavaObject(jsonObject, String.class);
        System.out.println("s1 = " + s1);
        //s1 = {"password":"0987","name":"李园松","noName":{"img":"秦威","num":666},"list":[1,2]}