package test;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
public class VarTest {
public static void main(String[] args) {
LiuJieTestObj obj = new LiuJieTestObj();
obj.setId(111L);
Date date1 = new Date(2019, 7, 23);
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
df.format(date1);
obj.setTestDate(date1);
// 错误示范1 报错：Exception in thread "main" com.alibaba.fastjson.JSONException: expect '[', but {, pos 1, line1,column 2
String str = JSON.toJSONString(obj);// 放进去的不是List
List<LiuJieTestObj> objList = JSON.parseArray(str, LiuJieTestObj.class);// 取一个List
// 错误示范2 报错：Exception in thread "main" com.alibaba.fastjson.JSONException: expect '[', but {, pos 1, line1,column 2
String str2 = JSONArray.toJSONString(obj);// 放进去的是非List的对象
List<LiuJieTestObj> objList2 = JSON.parseArray(str2, LiuJieTestObj.class);// 取一个List
// 正确示范3
List<LiuJieTestObj> list = new ArrayList<>();
list.add(obj);
String str3 = JSON.toJSONString(list);// 放进去的是List
List<LiuJieTestObj> objList3 = JSON.parseArray(str3, LiuJieTestObj.class);// 取一个List
}
}