场景:
JSON字符串转List集合与List集合转JSON字符串
使用的jar包是fastjson-1.2.41.jar
1.JSON字符串转List集合操作
public static <T> List<T> parseArray(String text, Class<T> clazz) {try {return JSON.parseArray(text, clazz);} catch (Exception e) {}return Collections.emptyList();}
2.List集合转JSON字符串操作
public static String toJSONString2(Object obj) {JSONArray jsonObj = (JSONArray) JSONArray.toJSON(obj);return jsonObj.toJSONString();}
3.测试demo的main函数
public static void main(String []args){System.out.println("测试开始");//对象一DemoModel model = new DemoModel();model.setId(12345678);model.setType("01");model.setZ(1111.2222);model.setZ1(3333.4444);model.setZ2(5555.6666);model.setZ3(7777.8888);//对象二DemoModel model1 = new DemoModel();model1.setId(87654321);model1.setType("02");model1.setZ(2222.1111);model1.setZ1(4444.3333);model1.setZ2(6666.5555);model1.setZ3(8888.7777);//新建ListList list = new ArrayList();list.add(model);list.add(model1);//List集合转JSON字符串String result = toJSONString2(list);System.out.println(result);//JSON字符串转List集合 List list2 = parseArray(result,DemoModel.class);for(int i=0;i<list2.size();i++){DemoModel modelTemp = (DemoModel) list2.get(i);System.out.println("取值 z1=" + modelTemp.getZ1());}System.out.println("测试结束");}
4.实体对象DemoModel.java
public class DemoModel implements Serializable{private static final long serialVersionUID = 6428876123605652053L;private long id;private String type;private double z;private double z1;private double z2;private double z3;public long getId() {return id;}public void setId(long id) {this.id = id;}public String getType() {return type;}public void setType(String type) {this.type = type;}public double getZ() {return z;}public void setZ(double z) {this.z = z;}public double getZ1() {return z1;}public void setZ1(double z1) {this.z1 = z1;}public double getZ2() {return z2;}public void setZ2(double z2) {this.z2 = z2;}public double getZ3() {return z3;}public void setZ3(double z3) {this.z3 = z3;}}
以上,TKS
