toString()与 gson.toJson(xxx)的区别

一、json转String 

String string = posJ.toString();
//两者区别
String json = gson.toJson(posJ);

将json数据转为String，posJ为一段json数据，

 

1、使用

Object posJ = dangerRecordEntity.getInfo().getPos();
String string = posJ.toString();

转出的效果为：

{x=5, y=2, width=1, height=2, baseWidth=1, baseHeight=2}

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2、使用

Object posJ = dangerRecordEntity.getInfo().getPos();
Gson gson = new Gson();​​​​​​​
String json = gson.toJson(posJ);

转出效果为：

{"x":5,"y":2,"width":1,"height":2,"baseWidth":1,"baseHeight":2}

二、string转json

Gson gson = new Gson();
PosData posData = new PosData();
posData = gson.fromJson(li.getPos(), PosData.class);
System.out.println(posData );