ObjectMapper对json结构字符串和Java对象的转换

package com.gtstar.cbos.web.ccs.controller.billManage;

import java.io.IOException;
import com.fasterxml.jackson.databind.ObjectMapper;

public class ObjectMapperTest {
public static void main(String[] args) {
String jsonString = "{\"name\":\"zhangsan\",\"age\":\"20\",\"gender\":\"男\"}";
ObjectMapper mapper = new ObjectMapper();
// 将json结构的字符串转换成一个java对象
try {
Student student = mapper.readValue(jsonString, Student.class);
System.out.println("转换后的Java对象：" + student);
System.out.println("姓名：" + student.getName() + "\t年龄：" + student.getAge() + "\t性别：" + student.getGender());
// 将一个studnet对象转换成json结构的字符串
String strJson = mapper.writeValueAsString(student);
System.out.println("将对象转换后的json结构的字符串：" + strJson);
System.out.println("----------对数组对象结构类型的json数据转换成Java对象数组的操作--------------------");
// 将一个对象数组类型的json结构字符串转换成java对象
String jsonArry = "[{\"name\":\"zhangsan\",\"age\":\"20\",\"gender\":\"男\"},{\"name\":\"zhaoliu\",\"age\":\"22\",\"gender\":\"女\"}]";
Student[] stu = mapper.readValue(jsonArry, Student[].class);
for (Student s : stu) {
System.out.println("姓名：" + s.getName() + "\t年龄：" + s.getAge() + "\t性别：" + s.getGender());
}
System.out.println("----------将数组对象转换成json数据结构类型的字符串----------------------");
String ss = mapper.writeValueAsString(stu);
System.out.println(ss);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}