如何转换string到一个带list属性的对象 fastjson fastjson怎么将一个字符串转换成list<map<st...
java\u4e2d\u4e00\u4e2a\u5305\u542bbean\u5c5e\u6027\u7684list\u96c6\u5408 \u5982\u4f55\u8f6c\u6362\u6210JSON\u3000\u3000java\u4e2d\u7684list\u662f\u6570\u7ec4\u7684\u53d8\u5f62\uff0c\u6362\u53e5\u8bdd\u8bf4\uff0clist\u5c31\u662f\u53ef\u53d8\u6362\u957f\u5ea6\u7684\u6570\u7ec4\u3002\u56e0\u6b64java\u4e2d\u7684list\u8f6c\u6362\u6210JSON\u540e\u5c31\u6210\u4e86JSON\u4e2d\u7684\u6570\u7ec4\uff1b
\u3000\u3000JSON(JavaScript Object Notation) \u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u7684\u6570\u636e\u4ea4\u6362\u683c\u5f0f\u3002\u5b83\u57fa\u4e8eECMAScript\u7684\u4e00\u4e2a\u5b50\u96c6\u3002 JSON\u91c7\u7528\u5b8c\u5168\u72ec\u7acb\u4e8e\u8bed\u8a00\u7684\u6587\u672c\u683c\u5f0f\uff0c\u4f46\u662f\u4e5f\u4f7f\u7528\u4e86\u7c7b\u4f3c\u4e8eC\u8bed\u8a00\u5bb6\u65cf\u7684\u4e60\u60ef\uff08\u5305\u62ecC\u3001C++\u3001C#\u3001Java\u3001JavaScript\u3001Perl\u3001Python\u7b49\uff09\u3002\u8fd9\u4e9b\u7279\u6027\u4f7fJSON\u6210\u4e3a\u7406\u60f3\u7684\u6570\u636e\u4ea4\u6362\u8bed\u8a00\u3002 \u6613\u4e8e\u4eba\u9605\u8bfb\u548c\u7f16\u5199\uff0c\u540c\u65f6\u4e5f\u6613\u4e8e\u673a\u5668\u89e3\u6790\u548c\u751f\u6210(\u4e00\u822c\u7528\u4e8e\u63d0\u5347\u7f51\u7edc\u4f20\u8f93\u901f\u7387)\u3002
\u3000\u3000java\u4e2d\u5c06\u4e00\u4e2ajava\u5bf9\u8c61\u8f6c\u6362\u6210\u4e00\u4e2ajson\uff0c\u5982\u679c\u8981\u53bb\u5b9e\u73b0\u7684\u8bdd\uff0c\u6bd4\u8f83\u9ebb\u70e6\uff0c\u5f53\u4e0b\u6709\u5f88\u591ajava\u5bf9\u8c61\u4e0ejson\u5b57\u7b26\u4e32\u4e4b\u95f4\u8f6c\u6362\u7684\u5de5\u5177\uff0c\u4f8b\u5982google\u7684\u5f00\u6e90\u5de5\u5177Gson\uff08jar\u5305\uff09\uff0c\u901a\u8fc7\u5b83\u5c31\u53ef\u4ee5\u76f4\u63a5\u5c06java\u5bf9\u8c61\u4f5c\u4e3a\u5165\u53c2\u4f20\u8fdb\u53bb\uff0c\u8fd4\u56de\u4e00\u4e2ajson\u5b57\u7b26\u4e32\u3002
\u4f7f\u7528fastjson \u5c31\u4e0d\u8981\u518d\u60f3 list\u3001map \u4e86\uff0c\u7528api \u5904\u7406\u66f4\u52a0\u65b9\u4fbf\u554a\u3002
JSON.parseArray(jsonstr) \u8fd4\u56de\u7684 JsonArray \u5c31\u662f\u4f60\u60f3\u8981\u7684 list
需要导入fastjson所需要的jar包，具体为json-lib-2.3-jdk15.jar 、commons-beanutils-1.7.0.jar 、commons-httpclient-3.1.jar 、commons-lang-2.3.jar 、commons-logging-1.0.4.jar 、commons-collections-3.1.jar 、ezmorph-1.0.3.jar 、fastjson-1.1.6.jar。
具体代码如下：
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.junit.Test;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
public class JedisTest {
@SuppressWarnings("unchecked")
@Test
public <T> void strToJson() {
/*
* 模拟fastjson数据
*/
HashMap<String, String> user1 = new HashMap<>();
user1.put("id", "1");
user1.put("name", "a");
user1.put("sex", "男");
HashMap<String, String> user2 = new HashMap<>();
user2.put("id", "2");
user2.put("name", "3");
user2.put("sex", "女");
List<T> list = new ArrayList<>();
list.add((T) user1);
list.add((T) user2);
Map<String, T> map = new HashMap<>();
map.put("list", (T) list);
JSONObject jsons = (JSONObject) JSON.toJSON(map);
System.out.println("输出结果为：");
System.out.println(jsons);
/*
* 封装需要字符串
*/
Map<String, T> ress = JSON.toJavaObject(jsons, Map.class);
List<T> result = (List<T>) ress.get("list");
// 需要加入的String
String str = "Hello World!";
// 加入方式建议给一个键值
HashMap<String, String> say = new HashMap<>();
say.put("key", str);
result.add((T) say);
// 重新装载
ress = new HashMap<>();
ress.put("list", (T) result);
JSONObject json = (JSONObject) JSON.toJSON(ress);
System.out.println("处理过后的json数据：");
System.out.println(json);
}
}
下面是测试结果：
输出结果为：
{"list":[{"id":"1","name":"a","sex":"男"},{"id":"2","name":"3","sex":"女"}]}
处理过后的json数据：
{"list":[{"id":"1","name":"a","sex":"男"},{"id":"2","name":"3","sex":"女"},{"key":"Hello World!"}]}
只要你的json格式是正确的，直接把这个json字符串用fastjson转换就可以了啊。
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