1. The function of this method is to convert the data in json format into array format.
2. Suppose there is a Person class with json type data str=str = [{"name":"Zhang San","age":"1"},{"name":"Li Si","age" :"4"}], then
List listt = json.parseArray(str, Person.class); listt can receive str,
First construct two classes:
TestData class:
package com.xzw.test;
public class TestData {
Private String id;
private int arrtibute;
private int sort;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public int getArrtibute() {
return arrtibute;
}
public void setArrtibute(int arrtibute) {
this.arrtibute = arrtibute;
}
public int getSort() {
return sort;
}
public void setSort(int sort) {
this.sort = sort;
}
}
RecVo class:
package com.xzw.test;
import java.util.List;
public class RecVo {
private List<TestData> RecVo;
public List<TestData> getRecVo() {
return RecVo;
}
public void setRecVo(List<TestData> recVo) {
RecVo = recVo;
}
}
Call function code:
RecVo recVo = new RecVo();
List<TestData> list = new ArrayList<>();
TestData testData1 = new TestData();
testData1.setArrtibute(28);
testData1.setSort(5);
testData1.setId("L0000002");
TestData testData2 = new TestData();
testData2.setArrtibute(28);
testData2.setSort(9);
testData2.setId("L0000012");
list.add(testData1);
list.add(testData2);
recVo.setRecVo(list);
String str = JSON.toJSONString(recVo);
System.out.println(str);
//根据RecVo.class将str解析成对象
RecVo toObj = JSON.parseObject(str, RecVo.class);
System.out.println(toObj.getRecVo().size());
String arrJson = JSON.toJSONString(list);
System.out.println(arrJson);
//根据TestData.class将arrJson解析成数组
List<TestData> arrList = JSON.parseArray(arrJson, TestData.class);
System.out.println(arrList.get(0).getArrtibute());
result:
{“recVo”:[{“arrtibute”:28,”id”:”L0000002”,”sort”:5},{“arrtibute”:28,”id”:”L0000012”,”sort”:9}]}
2
[{“arrtibute”:28,”id”:”L0000002”,”sort”:5},{“arrtibute”:28,”id”:”L0000012”,”sort”:9}]
28
This example is a good example of the role of toJSONString, parseObject, and parseArray.