map转换成JSON的3种方法
http://www.json.cn/JSON格式校验
1 json-lib
<dependency> <groupId>net.sf.json-lib</groupId> <artifactId>json-lib</artifactId> <version>2.4</version> <classifier>jdk15</classifier> </dependency>
import java.util.HashMap; import java.util.Map; import net.sf.json.JSONObject; public class aaa { public static void main(String[] args) { Map map = new HashMap(); map.put("msg", "yes");//map里面装有yes JSONObject jsonObject = JSONObject.fromObject(map); System.out.println("输出的结果是:" + jsonObject); //3、将json对象转化为json字符串 String result = jsonObject.toString(); System.out.println(result); } }
json-lib是一个比较老的解决方案,近几年都没有升级过,它的适用环境是JDK1.5,使用JDK1.6就有可能会报错。所以配置上加入classifier-jdk15来解决这个问题。JAR下载链接
2alibaba
JSONUtils.toJSONString(requestMap); com.alibaba.fastjson.JSON
maven坐标
<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson --> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.41</version> </dependency>
3 google
new Gson().toJson(param); com.google.gson.2.2.2.jar JAR包下载
maven坐标
<!-- https://mvnrepository.com/artifact/com.google.code.gson/gson --> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.3.1</version> </dependency>
--------------------===-------------------------附--MAP的ASCII排序-----------------------===------------------------
StringBuilder sb = new StringBuilder(); List<String> keys = new ArrayList<String>(map.keySet()); Collections.sort(keys);//排序。 for(String k : keys){ String v = params.get(k); if(StringUtils.isNotEmpty(v)){ sb.append(v); } } //return MD5.toMD5(sb+key, "UTF-8");这个就不用看了~~~
posted on 2018-05-24 17:11 nickTimer 阅读(2527) 评论(0) 编辑 收藏 举报