import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
public class Demo {
public static void main(String[] args) {
Map<String, Student> map =
new HashMap<String, Student>
();
Student stu1 =
new Student("1", "莎拉波娃"
);
Student stu2 =
new Student("2", "布沙尔"
);
Student stu3 =
new Student("3", "哈勒普"
);
map.put("00011"
, stu1);
map.put("00012"
, stu2);
map.put("00013"
, stu3);
objectToStr(map);
String str = "{'00011':{'id':'1','name':'silei'},'00012':{'id':'2','name':'布沙尔'},'00013':{'id':'3','name':'哈勒普'}}"
;
strToObject(str);
}
public static void strToObject(String str) {
Map<String, Student> map = (Map<String, Student>) JSON.parseObject(str,
new TypeReference<Map<String, Student>>
() {
});
Set<Entry<String, Student>> m =
map.entrySet();
Iterator<Entry<String, Student>> it =
m.iterator();
while (it.hasNext()) {
Entry<String, Student> en =
it.next();
String id =
en.getKey();
Student stu =
en.getValue();
System.out.println(stu.getId() + "===" +
stu.getName());
}
System.out.println(map.size());
}
// 把对象转换成JSON字符串
public static void objectToStr(Map map) {
String str =
JSON.toJSONString(map);
System.out.println(str);
}
}
转载于:https://www.cnblogs.com/mjbrian/p/6829097.html
相关资源：JAVA上百实例源码以及开源项目
