日期:2014-05-16  浏览次数:20514 次

java 解析json相关

一json-lib.jar开发包使用依赖包
json-lib.jar开发包使用需要依赖包以下开发包:

Json-lib requires (at least) the following dependencies in your classpath:
??? * jakarta commons-lang 2.4
??? * jakarta commons-beanutils 1.7.0
??? * jakarta commons-collections 3.2
??? * jakarta commons-logging 1.1.1
??? * ezmorph 1.0.6
.二.
public class JsonUtil {

/**页面传至后台时,json数据在request的参数名称*/
public final static String JSON_ATTRIBUTE = "json";
public final static String JSON_ATTRIBUTE1 = "json1";
public final static String JSON_ATTRIBUTE2 = "json2";
public final static String JSON_ATTRIBUTE3 = "json3";
public final static String JSON_ATTRIBUTE4 = "json4";

/**
* 从一个JSON 对象字符格式中得到一个java对象,形如:
* {"id" : idValue, "name" : nameValue, "aBean" : {"aBeanId" : aBeanIdValue, ...}}
* @param object
* @param clazz
* @return
*/
public static Object getDTO(String jsonString, Class clazz){
JSONObject jsonObject = null;
try{
setDataFormat2JAVA();
jsonObject = JSONObject.fromObject(jsonString);
}catch(Exception e){
e.printStackTrace();
}
return JSONObject.toBean(jsonObject, clazz);
}

/**
* 从一个JSON 对象字符格式中得到一个java对象,其中beansList是一类的集合,形如:
* {"id" : idValue, "name" : nameValue, "aBean" : {"aBeanId" : aBeanIdValue, ...},
* beansList:[{}, {}, ...]}
* @param jsonString
* @param clazz
* @param map 集合属性的类型 (key : 集合属性名, value : 集合属性类型class) eg: ("beansList" : Bean.class)
* @return
*/
public static Object getDTO(String jsonString, Class clazz, Map map){
JSONObject jsonObject = null;
try{
setDataFormat2JAVA();
jsonObject = JSONObject.fromObject(jsonString);
}catch(Exception e){
e.printStackTrace();
}
return JSONObject.toBean(jsonObject, clazz, map);
}

/**
* 从一个JSON数组得到一个java对象数组,形如:
* [{"id" : idValue, "name" : nameValue}, {"id" : idValue, "name" : nameValue}, ...]
* @param object
* @param clazz
* @return
*/
public static Object[] getDTOArray(String jsonString, Class clazz){
setDataFormat2JAVA();
JSONArray array = JSONArray.fromObject(jsonString);
Object[] obj = new Object[array.size()];
for(int i = 0; i < array.size(); i++){
JSONObject jsonObject = array.getJSONObject(i);
obj[i] = JSONObject.toBean(jsonObject, clazz);
}
return obj;
}

/**
* 从一个JSON数组得到一个java对象数组,形如:
* [{"id" : idValue, "name" : nameValue}, {"id" : idValue, "name" : nameValue}, ...]
* @param object
* @param clazz
* @param map
* @return
*/
public static Object[] getDTOArray(String jsonString, Class clazz, Map map){
setDataFormat2JAVA();
JSONArray array = JSONArray.fromObject(jsonString);
Object[] obj = new Object[array.size()];
for(int i = 0; i < array.size(); i++){
JSONObject jsonObject = array.getJSONObject(i);
obj[i] = JSONObject.toBean(jsonObject, clazz, map);
}
return obj;
}

/**
* 从一个JSON数组得到一个java对象集合
* @param object
* @param clazz
* @return
*/
public static List getDTOList(String jsonString, Class clazz){
setDataFormat2JAVA();
JSONArray array = JSONArray.fromObject(jsonString);
List list = new ArrayList();
for(Iterator iter = array.iterator(); iter.hasNext();){
JSONObject jsonObject = (JSONObject)iter.next();
list.add(JSONObject.toBean(jsonObject, clazz));
}
return list;
}

/**
* 从一个JSON数组得到一个java对象集合,其中对象中包含有集合属性
* @param object
* @param clazz
* @param map 集合属性的类型
* @return
*/
public static List getDTOList(String jsonString, Class clazz, Map map){
setDataFormat2JAVA();
JSONArray array = JSONArray.fromObject(jsonString);
List list = new ArrayList();
for(Iterator iter = array.iterator(); iter.hasNext();){
JSONObject jsonObject = (JSONObject)iter.next();
list.add(JSONObject.toBean(jsonObject, clazz, map));
}