关于编码的问题 - 黑马程序员技术交流社区

package cn.itcast.response;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.URLEncoder;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ResponseDemo2 extends HttpServlet {
//文件下载
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String path=this.getServletContext().getRealPath("/download/书画.jpg");
String name=path.substring(path.lastIndexOf("\\")+1);
//如果下载文件是中文文件，则文件需要经过URL编码
response.setHeader("content-disposition", "attachment;filename="+URLEncoder.encode(name,"UTF-8"));
InputStream in=null;
OutputStream out=null;
try{
in=new FileInputStream(path);
int len=0;
byte[] buffer=new byte[1024];
out=response.getOutputStream();
while((len=in.read(buffer))>0){
out.write(buffer,0,len);
}
}finally{
try{
if(in!=null){
in.close();
}
}catch(IOException e){
e.printStackTrace();
}
try{
if(out!=null){
out.close();
}
}catch(IOException e){
e.printStackTrace();
}
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request,response);
}
}

复制代码