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【Java】 Java图片上传代码

作者:李朝强 / 发布于2013/7/19/ 1047


	package com.bj95ol.test;
	
	import java.io.BufferedReader;
	import java.io.File;
	import java.io.FileNotFoundException;
	import java.io.FileOutputStream;
	import java.io.IOException;
	import java.io.InputStream;
	import java.io.InputStreamReader;
	import java.io.OutputStreamWriter;
	import java.io.PrintWriter;
	import java.net.HttpURLConnection;
	import java.net.MalformedURLException;
	import java.net.URL;
	
	import javax.servlet.ServletInputStream;
	import javax.servlet.http.HttpServletRequest;
	
	import sun.misc.BASE64Decoder;
	import sun.misc.BASE64Encoder;
	
	public class SendImgToWeb {
	 /**
	 * 获得网络图片地址。或者图片地址
	 * @param url
	 * @return
	 */
	 public String getContentFromWeb(String url)
	 {
	 String filecontent="";
	 InputStream is=null;
	 BASE64Encoder base=new BASE64Encoder();
	 if(url.startsWith("http"))
	 {
	 try {
	 HttpURLConnection urlconn=(HttpURLConnection)new URL(url).openConnection();
	 is=urlconn.getInputStream();
	 } catch (MalformedURLException e) {
	 // TODO Auto-generated catch block
	 e.printStackTrace();
	 } catch (IOException e) {
	 // TODO Auto-generated catch block
	 e.printStackTrace();
	 }
	 }
	 int n=0;
	 byte[] b=null;
	 try {
	 while((n=is.available())>0)
	 {
	 n=is.read(b);
	 if(n==-1)break;
	 filecontent=filecontent+base.encode(b);
	
	 }
	 is.close();
	 } catch (IOException e) {
	 // TODO Auto-generated catch block
	 e.printStackTrace();
	 }
	 return filecontent;
	 }
	
	 /**
	 * 将图片内容用post方式发送到url中
	 * @param url
	 * @param postcontent
	 */
	
	 public void sendImgbyPost(String url,String postcontent)
	 {
	 try {
	 HttpURLConnection huc=(HttpURLConnection)new URL(url).openConnection();
	 huc.setDoInput(true);
	 huc.setDoOutput(true);
	 huc.setRequestMethod("POST");
	
	 PrintWriter pw=new PrintWriter(new OutputStreamWriter(huc.getOutputStream()));
	 pw.print(postcontent);
	 pw.close();
	
	 BufferedReader br=new BufferedReader(new InputStreamReader(huc.getInputStream()));
	 String content="";
	 String line=br.readLine();
	 while(line!=null)
	 {
	 content=content+line;
	 line=br.readLine();
	
	 }
	
	 } catch (MalformedURLException e) {
	 // TODO Auto-generated catch block
	 e.printStackTrace();
	 } catch (IOException e) {
	 // TODO Auto-generated catch block
	 e.printStackTrace();
	 }
	
	 }
	 /**
	 * 在服务器端获取发送过来的内容
	 * @param request
	 * @return
	 */
	 public String receiveContent(HttpServletRequest request)
	 {
	 int a = 0;
	 byte[] b = new byte[4096];
	 String result="";
	 try
	 {
	 ServletInputStream sis=request.getInputStream();
	 int line=sis.readLine(b, 0, b.length);
	 while(line!=-1)
	 {
	 result=result+new String(b,0,line);
	 line=sis.readLine(b, 0, b.length);
	 }
	 }
	 catch(Exception e)
	 {
	 e.printStackTrace();
	 }
	 return result;
	 }
	
	 /**
	 * 将接受过来的信息生成文件
	 * @param request
	 * @param filename
	 */
	 public void createFile(HttpServletRequest request,String filename)
	 {
	 File file=new File(filename);
	 try {
	 FileOutputStream fos=new FileOutputStream(file);
	 String content=receiveContent(request);
	 BASE64Decoder base=new BASE64Decoder();
	 byte[] b=base.decodeBuffer(content);
	 fos.write(b);
	 fos.close();
	
	 } catch (FileNotFoundException e) {
	 // TODO Auto-generated catch block
	 e.printStackTrace();
	 } catch (IOException e) {
	 // TODO Auto-generated catch block
	 e.printStackTrace();
	 }
	
	 }
	
	}

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