package cn.fiyo.base.util;import java.io.IOException;import java.io.PrintWriter;import java.text.SimpleDateFormat;import java.util.*;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.beanutils.BeanUtils;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.springframework.beans.propertyeditors.CustomDateEditor;import org.springframework.beans.propertyeditors.StringTrimmerEditor;import org.springframework.web.bind.ServletRequestDataBinder;import cn.easecom.platform.module.basic.web.user.UserContext;import net.sf.json.JSONArray;import net.sf.json.JSONObject;public class JsonUtils {private static final Log log = LogFactory.getLog(JsonUtils.class);public JsonUtils() {}/** * 向客户端输出JSON */public static void outputJson(HttpServletResponse response, JSONObject json)throws Exception {response.setCharacterEncoding("UTF-8");PrintWriter out = response.getWriter();out.write(json.toString());out.flush();}/** * 从一个JSON 对象字符格式中得到一个java对象 * */public static Object toBean(String jsonString, Class beanClass) {JSONObject jsonObject = JSONObject.fromObject(jsonString);Object object = JSONObject.toBean(jsonObject, beanClass);return object;}public static Object toBean(String jsonString, Class beanClass,Map map) {JSONObject jsonObject = JSONObject.fromObject(jsonString);Object object = JSONObject.toBean(jsonObject, beanClass,map);return object;}/** * 从json对象集合表达式中得到一个java对象列表 * @param jsonString:数组字符串[{key1:value1,key2:value2},{bean2},{bean3},...] * @param pojoClass * @return */public static List toList(String jsonString, Class beanClass) {JSONArray jsonArray = JSONArray.fromObject(jsonString);List list = new ArrayList();for (int i = 0; i < jsonArray.size(); i++) {JSONObject jsonObject = jsonArray.getJSONObject(i);Object object = JSONObject.toBean(jsonObject, beanClass);list.add(object);}return list;}public static List toList(String jsonString, Class beanClass,Map map) {JSONArray jsonArray = JSONArray.fromObject(jsonString);List list = new ArrayList();for (int i = 0; i < jsonArray.size(); i++) {JSONObject jsonObject = jsonArray.getJSONObject(i);Object object = JSONObject.toBean(jsonObject, beanClass,map);list.add(object);}return list;}/** * 从json字符串中获取一个map，该map支持嵌套功能 * @param jsonString * @return */public static Map toMap(String jsonString) {JSONObject jsonObject = JSONObject.fromObject(jsonString);Iterator it = jsonObject.keys();Map map = new HashMap();while (it.hasNext()) {String key = (String) it.next();Object value = jsonObject.get(key);map.put(key, value);}return map;}/** * 从json数组中得到相应java数组 * @param jsonString * @return */public static Object[] toObjectArray(String jsonString) {JSONArray jsonArray = JSONArray.fromObject(jsonString);return jsonArray.toArray();}/** * 从json解析出java字符串数组 * @param jsonString * @return */public static String[] toStringArray(String jsonString) {JSONArray jsonArray = JSONArray.fromObject(jsonString);String[] stringArray = new String[jsonArray.size()];for (int i = 0; i < jsonArray.size(); i++) {stringArray[i] = jsonArray.getString(i);}return stringArray;}/** * 从json解析出javaLong型对象数组 * @param jsonString * @return */public static Long[] toLongArray(String jsonString) {JSONArray jsonArray = JSONArray.fromObject(jsonString);Long[] longArray = new Long[jsonArray.size()];for (int i = 0; i < jsonArray.size(); i++) {longArray[i] = jsonArray.getLong(i);}return longArray;}/** * 从json解析出java Integer型对象数组 * @param jsonString:[1,2,3,4] * @return */public static Integer[] toIntegerArray(String jsonString) {JSONArray jsonArray = JSONArray.fromObject(jsonString);Integer[] integerArray = new Integer[jsonArray.size()];for (int i = 0; i < jsonArray.size(); i++) {integerArray[i] = jsonArray.getInt(i);}return integerArray;}/** * 从json中解析出java Double型对象数组 * @param jsonString * @return */public static Double[] toDoubleArray(String jsonString) {JSONArray jsonArray = JSONArray.fromObject(jsonString);Double[] doubleArray = new Double[jsonArray.size()];for (int i = 0; i < jsonArray.size(); i++) {doubleArray[i] = jsonArray.getDouble(i);}return doubleArray;}/** * 将java对象转换成json字符串 * @param javaObj * @return */public static String toJsonString(Object object) {JSONObject json = JSONObject.fromObject(object);return json.toString();}/* * 将java对象转化为json数组字符串 * [{"name":"name1","id":"id1"},{"name":"name2","id":"id2"}] */public static String toJsonArrayString(List<Object> list) {JSONArray jsonArray = JSONArray.fromObject(list);return jsonArray.toString();}private String dateFormat = "yyyy-MM-dd"; public void setDateFormat(String dateFormat){ this.dateFormat = dateFormat; } /** * 格式化日期字符串 */ public void initBinder(HttpServletRequest request,ServletRequestDataBinder binder){ SimpleDateFormat dateFormat = new SimpleDateFormat(this.dateFormat); dateFormat.setLenient(false); binder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, false)); binder.registerCustomEditor(String.class,new StringTrimmerEditor(false)); } @SuppressWarnings("unchecked") public static void outputJsonResponse(HttpServletResponse response,boolean result){ JSONObject json = new JSONObject(); json.put("result", result); String content=json.toString(); flushResponse(response,content); } /* * {"result":true,"msg":"abc"} */ @SuppressWarnings("unchecked") public static void outputJsonResponse(HttpServletResponse response,boolean result,String message){ JSONObject json = new JSONObject(); json.put("result", result); json.put("message", message); String content=json.toString(); flushResponse(response,content); } @SuppressWarnings("unchecked") public static void outputJsonResponse(HttpServletResponse response,boolean result,String message,String userData){ JSONObject json = new JSONObject(); json.put("result", result); json.put("message", message); json.put("userData", userData); String content=json.toString(); flushResponse(response,content); } /* * {"result":true,"data":{"key1":"value1","key2":"value2"}} */ @SuppressWarnings("unchecked") public static void outputJsonResponse(HttpServletResponse response,boolean result,String message,Map userData){ JSONObject json = new JSONObject(); json.put("result", result); json.put("message", message); if(userData!=null && userData.size()>0) json.put("userData", userData); String content=json.toString(); flushResponse(response,content); } /* * 输出json数据 * 输出格式为：{result:true,data:[{"name":"name1","id":"id1"},{"name":"name2","id":"id2"}]} */ public static void outputJsonResponse(HttpServletResponse response,boolean result,List list) { JSONObject json = new JSONObject(); json.put("result", result); if (list!=null && list.size()>0){ JSONArray jsonArray = JSONArray.fromObject(list); json.put("data", jsonArray); } String content=json.toString(); flushResponse(response,content); } /* * 输出ext列表的json数据 * 输出格式为：{totalProperty:12,root:[{"name":"name1","id":"id1"},{"name":"name2","id":"id2"}]} */ public static void outputJsonDataForExt(HttpServletResponse response,int totalProperty,List list) { JSONObject json = new JSONObject(); json.put("totalProperty", totalProperty); if (list!=null && list.size()>0){ JSONArray jsonArray = JSONArray.fromObject(list); json.put("root", jsonArray); } String content=json.toString(); flushResponse(response,content); } /** * Method to flush a String as response. * @param response * @param responseContent * @throws IOException */ public static void flushResponse(HttpServletResponse response,String responseContent){ response.setCharacterEncoding("UTF-8");try {PrintWriter writer = response.getWriter();writer.write(responseContent); writer.flush(); writer.close();} catch (IOException e) {log.error(e.getMessage());} } /** * @param response */ public static void outputXML(HttpServletResponse response, String xml) throws Exception { response.setContentType("text/xml; charset=UTF-8"); PrintWriter out = response.getWriter(); out.write(xml); out.flush(); } /* * 属性拷贝 */ public void copyProperties(Object dest, Object orig) {try {BeanUtils.copyProperties(dest, orig);} catch (Exception ex) {log.error("Copy property error: " + ex.toString());}}}
转自：http://sdfiyon.iteye.com/blog/1197519
