Json与javaBean之间的转换工具类

/** 
 * Json与javaBean之间的转换工具类 
 * 
 * {@code 现使用json-lib组件实现 
 *    需要 
 *     json-lib-2.4-jdk15.jar 
 *     ezmorph-1.0.6.jar 
 *     commons-collections-3.1.jar 
 *     commons-lang-2.0.jar 
 *    支持 
 * } 
 */

 

 

1. [代码]Json与javaBean之间的转换工具类     

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import java.lang.reflect.Field; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Set;   import net.sf.json.JSONArray; import net.sf.json.JSONObject; import net.sf.json.JsonConfig;   /**  * Json与javaBean之间的转换工具类  *  * @author 晚风工作室 www.soservers.com  * @version 20111221  *  * {@code   现使用json-lib组件实现  *          需要  *              json-lib-2.4-jdk15.jar  *              ezmorph-1.0.6.jar  *              commons-collections-3.1.jar  *              commons-lang-2.0.jar  *          支持  * }  */ public class JsonPluginsUtil {         /**       * 从一个JSON 对象字符格式中得到一个java对象       *        * @param jsonString       * @param beanCalss       * @return       */     @SuppressWarnings("unchecked")     public static <T> T jsonToBean(String jsonString, Class<T> beanCalss) {                   JSONObject jsonObject = JSONObject.fromObject(jsonString);         T bean = (T) JSONObject.toBean(jsonObject, beanCalss);                   return bean;               }       /**       * 将java对象转换成json字符串       *      * @param bean       * @return       */     public static String beanToJson(Object bean) {           JSONObject json = JSONObject.fromObject(bean);                   return json.toString();       }           /**       * 将java对象转换成json字符串       *      * @param bean       * @return       */     public static String beanToJson(Object bean, String[] _nory_changes, boolean nory) {           JSONObject json = null;                   if(nory){//转换_nory_changes里的属性                           Field[] fields = bean.getClass().getDeclaredFields();             String str = "";             for(Field field : fields){ //              System.out.println(field.getName());                 str+=(":"+field.getName());             }             fields = bean.getClass().getSuperclass().getDeclaredFields();             for(Field field : fields){ //              System.out.println(field.getName());                 str+=(":"+field.getName());             }             str+=":";             for(String s : _nory_changes){                 str = str.replace(":"+s+":", ":");             }             json = JSONObject.fromObject(bean,configJson(str.split(":")));                       }else{//转换除了_nory_changes里的属性                                           json = JSONObject.fromObject(bean,configJson(_nory_changes));         }                                       return json.toString();       }      private static JsonConfig configJson(String[] excludes) {                     JsonConfig jsonConfig = new JsonConfig();                     jsonConfig.setExcludes(excludes);   //                 jsonConfig.setIgnoreDefaultExcludes(false);   // //              jsonConfig.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);     //              jsonConfig.registerJsonValueProcessor(Date.class,   // //                  new DateJsonValueProcessor(datePattern));                                       return jsonConfig;                 }                /**      * 将java对象List集合转换成json字符串       * @param beans      * @return      */     @SuppressWarnings("unchecked")     public static String beanListToJson(List beans) {                   StringBuffer rest = new StringBuffer();                   rest.append("[");                   int size = beans.size();                   for (int i = 0; i < size; i++) {                           rest.append(beanToJson(beans.get(i))+((i<size-1)?",":""));           }                   rest.append("]");                   return rest.toString();       }           /**      *      * @param beans      * @param _no_changes      * @return      */     @SuppressWarnings("unchecked")     public static String beanListToJson(List beans, String[] _nory_changes, boolean nory) {                   StringBuffer rest = new StringBuffer();                   rest.append("[");                   int size = beans.size();                   for (int i = 0; i < size; i++) {             try{                 rest.append(beanToJson(beans.get(i),_nory_changes,nory));                 if(i<size-1){                     rest.append(",");                 }             }catch(Exception e){                 e.printStackTrace();             }         }                   rest.append("]");                   return rest.toString();       }       /**       * 从json HASH表达式中获取一个map，改map支持嵌套功能       *      * @param jsonString       * @return       */     @SuppressWarnings({ "unchecked" })     public static Map jsonToMap(String jsonString) {                   JSONObject jsonObject = JSONObject.fromObject(jsonString);         Iterator keyIter = jsonObject.keys();         String key;         Object value;         Map valueMap = new HashMap();           while (keyIter.hasNext()) {                           key = (String) keyIter.next();             value = jsonObject.get(key).toString();             valueMap.put(key, value);                       }           return valueMap;     }           /**      * map集合转换成json格式数据      * @param map      * @return      */     public static String mapToJson(Map<String, ?> map, String[] _nory_changes, boolean nory){                   String s_json = "{";                    Set<String> key = map.keySet();          for (Iterator<?> it = key.iterator(); it.hasNext();) {              String s = (String) it.next();              if(map.get(s) == null){                                 }else if(map.get(s) instanceof List<?>){                  s_json+=(s+":"+JsonPluginsUtil.beanListToJson((List<?>)map.get(s), _nory_changes, nory));                                }else{                  JSONObject json = JSONObject.fromObject(map);                  s_json += (s+":"+json.toString());;              }                             if(it.hasNext()){                  s_json+=",";              }         }            s_json+="}";         return s_json;     }       /**       * 从json数组中得到相应java数组       *      * @param jsonString       * @return       */     public static Object[] jsonToObjectArray(String jsonString) {                   JSONArray jsonArray = JSONArray.fromObject(jsonString);                   return jsonArray.toArray();       }           public static String listToJson(List<?> list) {                   JSONArray jsonArray = JSONArray.fromObject(list);                   return jsonArray.toString();       }       /**       * 从json对象集合表达式中得到一个java对象列表       *      * @param jsonString       * @param beanClass       * @return       */     @SuppressWarnings("unchecked")     public static <T> List<T> jsonToBeanList(String jsonString, Class<T> beanClass) {           JSONArray jsonArray = JSONArray.fromObject(jsonString);         JSONObject jsonObject;         T bean;         int size = jsonArray.size();         List<T> list = new ArrayList<T>(size);           for (int i = 0; i < size; i++) {               jsonObject = jsonArray.getJSONObject(i);             bean = (T) JSONObject.toBean(jsonObject, beanClass);             list.add(bean);           }                   return list;       }       /**       * 从json数组中解析出java字符串数组       *      * @param jsonString       * @return       */     public static String[] jsonToStringArray(String jsonString) {           JSONArray jsonArray = JSONArray.fromObject(jsonString);         String[] stringArray = new String[jsonArray.size()];         int size = jsonArray.size();           for (int i = 0; i < size; i++) {               stringArray[i] = jsonArray.getString(i);           }           return stringArray;     }       /**       * 从json数组中解析出javaLong型对象数组       *      * @param jsonString       * @return       */     public static Long[] jsonToLongArray(String jsonString) {           JSONArray jsonArray = JSONArray.fromObject(jsonString);         int size = jsonArray.size();         Long[] longArray = new Long[size];                   for (int i = 0; i < size; i++) {                           longArray[i] = jsonArray.getLong(i);           }                   return longArray;               }       /**       * 从json数组中解析出java Integer型对象数组       *      * @param jsonString       * @return       */     public static Integer[] jsonToIntegerArray(String jsonString) {           JSONArray jsonArray = JSONArray.fromObject(jsonString);         int size = jsonArray.size();         Integer[] integerArray = new Integer[size];                   for (int i = 0; i < size; i++) {                           integerArray[i] = jsonArray.getInt(i);           }                   return integerArray;               }       /**       * 从json数组中解析出java Double型对象数组       *      * @param jsonString       * @return       */     public static Double[] jsonToDoubleArray(String jsonString) {           JSONArray jsonArray = JSONArray.fromObject(jsonString);         int size = jsonArray.size();         Double[] doubleArray = new Double[size];                   for (int i = 0; i < size; i++) {                           doubleArray[i] = jsonArray.getDouble(i);           }                   return doubleArray;               }   }

2. [文件] json-lib-2.1.jar ~ 122KB     下载(652)     

3. [文件] ezmorph-1.0.6.jar ~ 84KB     下载(554)     

4. [文件] commons-collections-3.2.jar ~ 558KB     下载(565)     

5. [文件] commons-lang-2.5.jar ~ 273KB     下载(554)