Fastjson解析嵌套Map例子

由于在实际工作中使用fastjson解析嵌套map的场景非常多，所以在此备忘一下： 引入阿里的fastjson的pom：

Java代码

1. <dependency>
2. <groupId>com.alibaba</groupId>
3. <artifactId>fastjson</artifactId>
4. <version>1.2.15</version>
5. </dependency>

一个比较复杂的json例子：

Java代码

1. {
2. "actId": "1800025",
3. "originCode": 1,
4. "role": "TEACHER",
5. "time": 1471077017804,
6. "userId": "1111",
7. "userName": "测试教师",
8. "userIcon": "xyz",
9. "userIp": "1.1.1.1",
10. "countyId": "370105",
11. "countyName": "天桥区",
12. "schoolId": "1234",
13. "schoolName": "测试小学",
14. "data": {
15. "subjectId": "020",
16. "subjectName": "数学",
17. "uploadFileList": [
18. {
19. "teachFileType": "1",
20. "custom": "xtz"
21. },
22. {
23. "teachFileType": "1"
24. }
25. ]
26. }
27. }

使用fastjson的解析代码：

Java代码

1. import com.alibaba.fastjson.JSON;
3. import java.util.List;
4. import java.util.Map;
6. /**
7. * Created by Administrator on 2016/8/12.
8. */
9. public class ParserJson {
11. /***
12. *
13. * @param map 需要打印的Map结构
14. */
15. public static void showMap(Map<String,Object> map){
16. for(Map.Entry<String,Object> kv:map.entrySet()){
17. System.out.println(kv.getKey()+" "+kv.getValue());
18. }
19. }
21. public static void main(String[] args) throws Exception {
23. String json="{\"actId\":\"2300003\",\"originCode\":1,\"role\":\"TEACHER\"" +
24. ",\"time\":1470126407000,\"userId\":\"1111\",\"userName\":\"测试教师\",\"userIcon\":\"xyz\",\"userIp\":\"1.1.1.1\",\"countyId\":\"370105\",\"countyName\":\"天桥区\",\"schoolId\":\"1234\",\"schoolName\":\"测试小学\",\"data\":{\"subjectId\":\"020\",\"subjectName\":\"数学\"," +
25. "\"uploadFileList\":[{\"teachFileType\":\"1\"},{\"teachFileType\":\"1\",\"custom\":\"xt\"},{\"teachFileType\":\"1\"}]}}";
28. Map<String,Object> map=(Map)JSON.parse(json);
29. System.out.println("打印第一层map");
30. showMap(map);
31. Map<String,Object> dataMap=(Map<String, Object>) map.get("data");
32. System.out.println("打印第二层map");
33. showMap(dataMap);
34. System.out.println("打印第三层list+map");
35. List<Map<String,Object>> fileList= (List<Map<String, Object>>) dataMap.get("uploadFileList");
36. for(Map<String,Object> soj:fileList){
37. System.out.println(soj);
38. Map<String,Object> detailData=soj;
39. showMap(detailData);
40. System.out.println("----------------------------------------");
41. }
43. }
46. }

解析结果：

Java代码

1. ParserJson
2. 打印第一层map
3. role TEACHER
4. data {"uploadFileList":[{"teachFileType":"1"},{"custom":"xt","teachFileType":"1"},{"teachFileType":"1"}],"subjectId":"020","subjectName":"数学"}
5. actId 2300003
6. userName 测试教师
7. userId 1111
8. countyId 370105
9. schoolId 1234
10. userIp 1.1.1.1
11. originCode 1
12. time 1470126407000
13. userIcon xyz
14. schoolName 测试小学
15. countyName 天桥区
16. 打印第二层map
17. uploadFileList [{"teachFileType":"1"},{"custom":"xt","teachFileType":"1"},{"teachFileType":"1"}]
18. subjectId 020
19. subjectName 数学
20. 打印第三层list+map
21. {"teachFileType":"1"}
22. teachFileType 1
23. ----------------------------------------
24. {"custom":"xt","teachFileType":"1"}
25. custom xt
26. teachFileType 1
27. ----------------------------------------
28. {"teachFileType":"1"}
29. teachFileType 1
30. ----------------------------------------
32. Process finished with exit code 0