JAVA操作ObjectMapper類

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package com.zving;import org.codehaus.jackson.map.ObjectMapper;/** * 學習ObjectMapper類 *  * @author Clover */public class JacksonTester {    public static void main(String[] args) {        ObjectMapper mapper = new ObjectMapper();        String jsonString = "";        stringToStudent(mapper, jsonString);        studentToString(mapper, jsonString);        stringToStudentList(mapper, jsonString);    }    /**     * 字串轉實體類     *      * @param mapper     * @param jsonString     */    public static void stringToStudent(ObjectMapper mapper, String jsonString) {        jsonString = "{\"id\":1001,\"name\":\"Tom\",\"info\":\"一個小男孩\"}";        try {            Student student = mapper.readValue(jsonString, Student.class);            System.out.println(student);        } catch (Exception e) {            e.printStackTrace();        }    }    /**     * 實體類轉字串     *      * @param mapper     * @param jsonString     */    public static void studentToString(ObjectMapper mapper, String jsonString) {        Student student = new Student();        student.setId(1002);        student.setName("李四");        student.setInfo("一個小女孩");        try {            jsonString = mapper.writeValueAsString(student);            System.out.println(jsonString);        } catch (Exception e) {            e.printStackTrace();        }    }    /**     * 字串轉 List<實體類>     *      * @param mapper     * @param jsonString     */    public static void stringToStudentList(ObjectMapper mapper, String jsonString) {        jsonString = "[{\"id\":1001,\"name\":\"Tom\",\"info\":\"一個小男孩\"},{\"id\":1002,\"name\":\"Jane\",\"info\":\"一個小女孩\"}]";        try {            Student[] stu = mapper.readValue(jsonString, Student[].class);            for (Student student : stu) {                System.out.println(student);            }            String ss = mapper.writeValueAsString(stu);            System.out.println(ss);        } catch (Exception e) {            e.printStackTrace();        }    }}

 

JAVA操作ObjectMapper類