Fastjson解析嵌套Map例子

因爲在實際工做中使用fastjson解析嵌套map的場景很是多，因此在此備忘一下：

引入阿里的fastjson的pom：

<dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.15</version>
</dependency>

一個比較複雜的json例子：

{
    "actId": "1800025", 
    "originCode": 1, 
    "role": "TEACHER", 
    "time": 1471077017804, 
    "userId": "1111", 
    "userName": "測試教師", 
    "userIcon": "xyz", 
    "userIp": "1.1.1.1", 
    "countyId": "370105", 
    "countyName": "天橋區", 
    "schoolId": "1234", 
    "schoolName": "測試小學", 
    "data": {
        "subjectId": "020", 
        "subjectName": "數學", 
        "uploadFileList": [
            {
                "teachFileType": "1", 
                "custom": "xtz"
            }, 
            {
                "teachFileType": "1"
            }
        ]
    }
}

使用fastjson的解析代碼：

import com.alibaba.fastjson.JSON;

import java.util.List;
import java.util.Map;

/**
 * Created by Administrator on 2016/8/12.
 */
public class ParserJson {

    /***
     *
      * @param map 須要打印的Map結構
     */
    public static void showMap(Map<String,Object> map){
        for(Map.Entry<String,Object> kv:map.entrySet()){
            System.out.println(kv.getKey()+"  "+kv.getValue());
        }
    }

    public static void main(String[] args) throws Exception {

        String json="{\"actId\":\"2300003\",\"originCode\":1,\"role\":\"TEACHER\"" +
                ",\"time\":1470126407000,\"userId\":\"1111\",\"userName\":\"測試教師\",\"userIcon\":\"xyz\",\"userIp\":\"1.1.1.1\",\"countyId\":\"370105\",\"countyName\":\"天橋區\",\"schoolId\":\"1234\",\"schoolName\":\"測試小學\",\"data\":{\"subjectId\":\"020\",\"subjectName\":\"數學\"," +
                "\"uploadFileList\":[{\"teachFileType\":\"1\"},{\"teachFileType\":\"1\",\"custom\":\"xt\"},{\"teachFileType\":\"1\"}]}}";


        Map<String,Object> map=(Map)JSON.parse(json);
        System.out.println("打印第一層map");
        showMap(map);
        Map<String,Object> dataMap=(Map<String, Object>) map.get("data");
        System.out.println("打印第二層map");
        showMap(dataMap);
        System.out.println("打印第三層list+map");
       List<Map<String,Object>> fileList= (List<Map<String, Object>>) dataMap.get("uploadFileList");
        for(Map<String,Object> soj:fileList){
            System.out.println(soj);
            Map<String,Object> detailData=soj;
            showMap(detailData);
            System.out.println("----------------------------------------");
        }

    }


}

解析結果：

ParserJson
打印第一層map
role  TEACHER
data  {"uploadFileList":[{"teachFileType":"1"},{"custom":"xt","teachFileType":"1"},{"teachFileType":"1"}],"subjectId":"020","subjectName":"數學"}
actId  2300003
userName  測試教師
userId  1111
countyId  370105
schoolId  1234
userIp  1.1.1.1
originCode  1
time  1470126407000
userIcon  xyz
schoolName  測試小學
countyName  天橋區
打印第二層map
uploadFileList  [{"teachFileType":"1"},{"custom":"xt","teachFileType":"1"},{"teachFileType":"1"}]
subjectId  020
subjectName  數學
打印第三層list+map
{"teachFileType":"1"}
teachFileType  1
----------------------------------------
{"custom":"xt","teachFileType":"1"}
custom  xt
teachFileType  1
----------------------------------------
{"teachFileType":"1"}
teachFileType  1
----------------------------------------

Process finished with exit code 0