jsp+servlet上传图片的example

package com.funper.simpleface.servlet; import java.io.File; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.util.List; import com.funper.simpleface.upload.*; /** * example-upload文件上传组件使用范例 * */ public class UploadServlet extends HttpServlet { private static final long serialVersionUID = 1L; public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("GBK"); StringBuilder sb=new StringBuilder("已上传文件<hr>"); FileUploadCommon upload=new FileUploadCommon(request); //创建文件上传对象 File saveDir=new File(getServletContext().getRealPath("/")+"uploads"); //文件保存目录 upload.setAllowedMaxLength(1024*1024); //设置单个文件允许上传的最大尺寸,不设置则不限制 upload.setAllowedExtension(new String[]{"jpg","jpge", "gif", "png"}); //设置允许上传的文件类型,不设置则不限制 try { upload.acceptData(); //接收提交数据 List<UploadFile> uploadFileList=upload.getUploadFile(); //获取所有上传的文件 int i=1; for(UploadFile uf : uploadFileList){ sb.append("文件名：").append(uf.getFileName()) .append("<br>文件类型：").append(uf.getFileExtension()) .append("<br>文件大小：").append(uf.getFileSize()) .append("<br>--------------------"); uf.setFileName("uploadFile_"+i+uf.getFileExtension()); //设置保存文件名称,不设置则使用源文件名 uf.save(saveDir); //保存文件至指定目录 ++i; } //获取表单其他信息 String userName=upload.getRequestParameter("userName"); System.out.println("userName="+userName); upload.close(); //记住一定要释放资源 response.setCharacterEncoding("GB2312"); response.getWriter().write("<script language=\"javascript\">window.alert(\"上传成功!\");history.go(-1);</script>"); /* response.setContentType("text/html;charset=GBK"); response.getWriter().println(sb.toString()); response.getWriter().close();*/ } catch (MaxLengthExceededException e) { response.setCharacterEncoding("GB2312"); // 上传文件尺寸超出最大限制 //e.printStackTrace(); response.getWriter().write("<script language=\"javascript\">window.alert(\"文件允许上传的最大尺寸100*100!\");history.go(-1);</script>"); } catch (ExtensionExceededException e) { response.setCharacterEncoding("GB2312"); // 上传文件类型不在允许的范围 response.getWriter().write("<script language=\"javascript\">window.alert(\"上传的图片类型必须为jpg,bump格式的图片!\");history.go(-1);</script>"); } catch (IOException e) { e.printStackTrace(); }finally{ upload.close(); } } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } }