JSON.toJSONString 首字母不小写

1、在字段上加注解@JSONField

1. package com.cjh.wechatmp.po;
2.  
3. import com.alibaba.fastjson.annotation.JSONField;
4. import lombok.Data;
5. import lombok.NoArgsConstructor;
6.  
7. @NoArgsConstructor
8. @Data
9. public class InMessageText {
10.  
11. @JSONField(name = "ToUserName")
12. private String ToUserName;
13. @JSONField(name = "FromUserName")
14. private String FromUserName;
15. private String CreateTime;
16. private String MsgType;
17. private String Content;
18. private String MsgId;
19. }

优点：少量的话简单方便

缺点：入侵性强，懒得每个加

2、自定义配置

优点： 逼格高

缺点：并不是忽略不转，而是转了小写，再转回来大写

1. package com.wechat.util;
2.  
3. import java.util.Map;
4. import net.sf.json.JSONException;
5. import net.sf.json.JSONObject;
6. import net.sf.json.JsonConfig;
7. import net.sf.json.util.JavaIdentifierTransformer;
8. import net.sf.json.util.PropertySetStrategy;
9.  
10. public class JsonUtil {
11.  
12. public static Object toBean(JSONObject jsonObject, Class rootClass,
13. String[] ignoreLowercase, Map<String, Class> childClass) {
14. JsonConfig config = new JsonConfig();
15.  
16. //转换对象
17. config.setRootClass(rootClass);
18.  
19. //首字母小写
20. config.setJavaIdentifierTransformer(new JavaIdentifierTransformer() {
21. @Override
22. public String transformToJavaIdentifier(String str) {
23. if (ignoreLowercase.length > 0) {
24. for (String item : ignoreLowercase) {
25. if (str.indexOf(item) == 0) {
26. return str;
27. }
28. }
29. }
30. char[] chars = str.toCharArray();
31. chars[0] = Character.toLowerCase(chars[0]);
32. return new String(chars);
33. }
34. });
35.  
36. //对象里没有的属性忽略
37. config.setPropertySetStrategy(new PropertySetStrategy() {
38. @Override
39. public void setProperty(Object o, String s, Object o1) throws JSONException {
40. try {
41. PropertySetStrategy.DEFAULT.setProperty(o, s, o1);
42. } catch (JSONException e) {
43. }
44. }
45. });
46.  
47. //自定义的list声明
48. if (childClass != null) {
49. config.setClassMap(childClass);
50. }
51.  
52. return JSONObject.toBean(jsonObject, config);
53. }
54.  
55. }

3、用Gson代替(推荐)

优点：简单方便

缺点：要添加依赖，不过不会和之前的冲突哦

1. <!-- gson -->
2. <dependency>
3. <groupId>com.google.code.gson</groupId>
4. <artifactId>gson</artifactId>
5. <version>2.8.5</version>
6. </dependency>
效果：

1. InMessageText(ToUserName=toUser, FromUserName=fromUser, CreateTime=1348831860, MsgType=text, Content=this is a test, MsgId=1234567890123456)
2. <xml><Content><![CDATA[this is a test]]></Content><CreateTime><![CDATA[1348831860]]></CreateTime><ToUserName><![CDATA[toUser]]></ToUserName><FromUserName><![CDATA[fromUser]]></FromUserName><MsgType><![CDATA[text]]></MsgType><MsgId><![CDATA[1234567890123456]]></MsgId></xml>
3. Gson--->{"ToUserName":"toUser","FromUserName":"fromUser","CreateTime":"1348831860","MsgType":"text","Content":"this is a test","MsgId":"1234567890123456"}
4. JSONObject--->{"content":"this is a test","createTime":"1348831860","fromUserName":"fromUser","msgId":"1234567890123456","msgType":"text","toUserName":"toUser"}