根据指定网址,提供参数,返回图片数据

package tiku.service;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Date;

import javax.servlet.http.HttpServletRequest;

import tiku.util.PathUtil;
import wd.core.web.BaseTransaction;
/**
 * 根据指定网址,提供参数,返回图片数据
 * 
 *
 */
public class GsService{
public String imgSave() throws Exception{
HttpServletRequest request=getRequest();
String address=" http://latex.codecogs.com/gif.latex?";//网址
String spiltAfter="xxx";//参数
address=address+spiltAfter;
URL url=new URL(address);
//System.out.println(url);
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.connect();