import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import org.apache.commons.io.IOUtils;
@RequestMapping(value = "/download")
public void downloadMedia(HttpServletResponse response, HttpServletRequest request) {
InputStream inputStream = null;
OutputStream outputStream = null;
try {
//处理中文乱码
request.setCharacterEncoding("UTF-8");
String fileName = request.getParameter("fileName");
fileName = new String(fileName.getBytes("iso8859-1"),"UTF-8");
//处理浏览器兼容
response.setContentType("application/msexcel;charset=utf-8");//定义输出类型
Enumeration enumeration = request.getHeaders("User-Agent");
String browserName = (String) enumeration.nextElement();
boolean isMSIE = browserName.contains("MSIE");
if (isMSIE) {
response.addHeader("Content-Disposition", "attachment;fileName=" + URLEncoder.encode(fileName, "UTF8"));
} else {
response.addHeader("Content-Disposition", "attachment;fileName=" + new String(fileName.getBytes("gb2312"), "ISO8859-1"));
}
//url地址如果存在空格，会导致报错！ 解决方法为：用+或者%20代替url参数中的空格。
fileName = fileName.replace(" ", "%20");
//图片下载
URL url = new URL(fileName);
URLConnection conn = url.openConnection();
outputStream = response.getOutputStream();
inputStream = conn.getInputStream();
IOUtils.copy(inputStream, outputStream);
} catch (IOException e) {
System.err.println(e);
}finally {
IOUtils.closeQuietly(inputStream);
IOUtils.closeQuietly(outputStream);
}
}
