java 图片 后台旋转翻转替换生成

import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ImgRotateServlet extends HttpServlet {

/**
 * 
 */
private static final long serialVersionUID = 1L;

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
        doPost(req, resp);
}

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String method = request.getParameter("method");
if("turnleft".equals(method)){

try {
turnleft(request,response);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if("turnright".equals(method)){
try {
turnright(request,response);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}

private void turnright(HttpServletRequest request,HttpServletResponse response)throws Exception  {
response.setCharacterEncoding("UTF-8");
ImgRotate ir = new ImgRotate();
String urlright = request.getParameter("urlright");
        System.out.println(urlright);
File file1 = new File("urlright");
ir.rotateImage(file1,270);
}

private void turnleft(HttpServletRequest request,HttpServletResponse response)throws Exception {
response.setCharacterEncoding("UTF-8");
ImgRotate ir = new ImgRotate();