根据网址，返回JSONObject对象
import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.net.SocketTimeoutException;import java.net.URL;import java.net.URLConnection;import java.net.URLEncoder;import org.json.JSONException;import org.json.JSONObject;/** * 根据网址，返回编码方式为utf-8的JSONObject对象 * 注：只适合请求响应为json格式网址 * @param src 来源网址 * @author chitianxiang $22th March, 2012 - 2:44 p.m */static private JSONObject getJsonObj4Utf8(String src) throws Exception { return getJsonObj(src, "utf-8");}/** * 根据网址，返回JSONObject对象 * 注：只适合请求响应为json格式网址 * @param src 来源网址 * @param code 编码方式 * @author chitianxiang $22th March, 2012 - 2:42 p.m */static private JSONObject getJsonObj(String src, String code) { InputStreamReader reader = null; BufferedReader in = null; try { URL url = new URL(src); URLConnection connection = url.openConnection(); connection.setConnectTimeout(1000); reader = new InputStreamReader(connection.getInputStream(), code); in = new BufferedReader(reader); String line = null; //每行内容 int lineFlag = 0; //标记: 判断有没有数据 StringBuffer content = new StringBuffer(); while ((line = in.readLine()) != null) { content.append(line); lineFlag++; } return lineFlag == 0 ? null : new JSONObject(content.toString()); } catch (SocketTimeoutException e) { System.out.println("连接超时!!!"); return null; } catch (JSONException e) { System.out.println("网站响应不是json格式，无法转化成JSONObject!!!"); return null; } catch (Exception e) { System.out.println("连接网址不对或读取流出现异常!!!"); return null; } finally { if (in != null) { try { in.close(); } catch (IOException e) { System.out.println("关闭流出现异常!!!"); } } if (reader != null) { try { reader.close(); } catch (IOException e) { System.out.println("关闭流出现异常!!!"); } } }} //简单使用//小秘书网菜单http://www.xiaomishu.com/shop/postajax/GetDishList.aspx?pageSize=12&typeId=t1&typeSort=A0&resId=C47E19P46723&version=2//请求ajax网址StringBuilder sbSrc = new StringBuilder();sbSrc.append("http://www.xiaomishu.com/shop/postajax/GetDishList.aspx?pageSize=10");sbSrc.append("&typeId=" + dataId);sbSrc.append("&typeSort=A0");String resId = delEndSeparator(sourceUrl, "/");sbSrc.append("&resId=" + resId.substring(resId.lastIndexOf("/")));sbSrc.append("&version=2");//转换成json对象取出菜单JSONObject jo = getJsonObj4Utf8(sbSrc.toString());if (jo == null) { continue;}JSONObject menu = jo.getJSONObject("items");Iterator<String> keys = menu.keys();while (keys.hasNext()) { String key = keys.next(); JSONObject goods= menu.getJSONObject(key); String title = goods.get("title").toString(); String price = goods.get("price").toString(); String[] goodsInfo = new String[] {title, price}; goodsInfoLst.add(goodsInfo);}goodsInfoMap.put(goodstype, goodsInfoLst); /** * 删除符合规则的结束符 * @param obj等删除对象 * @param endWith结束符 * @author chitianxiang $Feb 4th, 2012 */static private String delEndSeparator(Object obj, String endWith) {String tempStr = "";if (!(obj instanceof String)) {tempStr = obj.toString();} else {tempStr = (String)obj;} return tempStr.endsWith(endWith) ? tempStr.substring(0, tempStr.length() - 1): tempStr;}