java 解析json字符串
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最近工作中,需要解析json格式的字符串,恰好有个例子,感觉不错,拿来分享。
运行这个类需要加载jar包:ezmorph-1.0.6.jar、json-lib-2.4-jdk15.jar、jsoup-1.6.1.jar、commons-beanutils-1.8.0.jar、commons-collections.jar、commons-lang-2.4.jar、commons-logging-1.1.1.jar。
commons-beanutils-1.8.0.jar不加这个包
java.lang.NoClassDefFoundError: org/apache/commons/beanutils/DynaBean
commons-collections.jar 不加这个包
java.lang.NoClassDefFoundError: org/apache/commons/collections/map/ListOrderedMap
commons-lang-2.4.jar不加这个包
java.lang.NoClassDefFoundError: org/apache/commons/lang/exception/NestableRuntimeException
commons-logging-1.1.1.jar不加这个包
java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
ezmorph-1.0.6.jar不加这个包
java.lang.NoClassDefFoundError: net/sf/ezmorph/Morpher
json-lib-2.4-jdk15.jar不加这个包
java.lang.NoClassDefFoundError: net/sf/json/JSONObject
相应jar包可到网上下载,也可以用下面提供的!
package src.util;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
public class TestJson
{
// json字符串转
private static String diskListContent =
"[{\"n1\":\"asd\",\"n2\":22,\"n3\":\"45.40GB\"," + "\"n4\":\"qwerty\",\"n5\":\"asd\",}," + "{\"n1\":\"local\","
+ "\"n2\":1,\"n3\":\"279.40GB\",\"n4\":\"ST3300656SS\",\"n5\":\"\\/devm\\/d0\"}]";
/***
* json字符串转java List
* @param rsContent
* @return
* @throws Exception
*/
private static List<Map<String, String>> jsonStringToList(String rsContent) throws Exception
{
JSONArray arry = JSONArray.fromObject(rsContent);
System.out.println("json字符串内容如下");
System.out.println(arry);
List<Map<String, String>> rsList = new ArrayList<Map<String, String>>();
for (int i = 0; i < arry.size(); i++)
{
JSONObject jsonObject = arry.getJSONObject(i);
Map<String, String> map = new HashMap<String, String>();
for (Iterator<?> iter = jsonObject.keys(); iter.hasNext();)
{
String key = (String) iter.next();
String value = jsonObject.get(key).toString();
map.put(key, value);
}
rsList.add(map);
}
return rsList;
}
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception
{
List<Map<String, String>> list1 = jsonStringToList(diskListContent);
System.out.println("json字符串成map");
for (Map<String, String> m : list1)
{
System.out.println(m);
}
System.out.println("map转换成json字符串");
for (Map<String, String> m : list1)
{
JSONArray jsonArray = JSONArray.fromObject(m);
System.out.println(jsonArray.toString());
}
System.out.println("list转换成json字符串");
JSONArray jsonArray2 = JSONArray.fromObject(list1);
System.out.println(jsonArray2.toString());
}
}