标签：read -name max ted bsp hold tput upload extends
上传页面
上传学生信息
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>上传学生信息</title> </head> <body> <form action="/lib/upload" method="post" enctype="multipart/form-data"> 学号 <input type="text" name="xuehao" id="xuehao"/> <br/> 姓名 <input type="text" name="xingming" id="xingming"> <br/> 密码 <input type="password" name="mima" id="mima"> <br/> 性别 <input type="radio" name="xingbie" value="nan" checked>男 <input type="radio" name="xingbie" value="nv" >女 <br/> 年龄 <input type="text" name="nianling" id="nianling"> <br/> 身高 <input type="text" name="shengao" id="shengao"> <br/> 学院 <select name="xueyuan"> <option value="computer">计算机学院</option> <option value="software">软件学院</option> </select> <br/> 照片 <input type="file" name="zhaopian" id="zhaopian"/> <br/> 简历 <input type="file" name="jianli" id="jianli"> <br/> <input type="submit" value="提交"> </form> </body> </html>
上传需要的配置信息web.xml
<servlet> <description></description> <display-name>UploadServlet</display-name> <servlet-name>UploadServlet</servlet-name> <servlet-class>com.sangewuxie.servlet.UploadServlet</servlet-class> <load-on-startup>0</load-on-startup> <multipart-config> <max-file-size>52428800</max-file-size> <max-request-size>52428800</max-request-size> <file-size-threshold>0</file-size-threshold> </multipart-config> </servlet> <servlet-mapping> <servlet-name>UploadServlet</servlet-name> <url-pattern>/upload</url-pattern> </servlet-mapping> <servlet>
上传的servlet
package com.sangewuxie.servlet; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import javax.servlet.ServletException; import javax.servlet.annotation.MultipartConfig; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.Part; import com.sangewuxie.dao.StudentDao; import com.sangewuxie.domain.Student; public class UploadServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { request.setCharacterEncoding("utf-8"); String xuehao = request.getParameter("xuehao"); String xingming = request.getParameter("xingming"); String mima = request.getParameter("mima"); String xingbie = request.getParameter("xingbie"); int nianling = Integer.parseInt(request.getParameter("nianling")); int shengao = Integer.parseInt(request.getParameter("shengao")); String xueyuan = request.getParameter("xueyuan"); String dir = request.getServletContext().getRealPath(""); Part zhaopianPart = request.getPart("zhaopian"); String zhaopian = upload(request, zhaopianPart, dir+"\\upload\\zhaopian"); Part jianliPart =request.getPart("jianli"); String jianli = upload(request, jianliPart, dir+"\\upload\\jianli"); Student student = new Student(xuehao, xingming, mima, xingbie, nianling, shengao, xueyuan, zhaopian, jianli); StudentDao.InsertStudentInfo(student); response.setContentType("text/html;charset=utf-8"); response.getWriter().write("上传成功"); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } public String upload(HttpServletRequest request,Part part,String dir) throws IOException { String cd = part.getHeader("content-disposition"); /** * tomcat7没有getSubmittedFileName()方法
* String filename = part.getSubmittedFileName() */ String filename = cd.substring(cd.lastIndexOf("=")+2, cd.length()-1); String houzhui = filename.substring(filename.lastIndexOf(‘.‘)); String destfilename = System.currentTimeMillis()+""; destfilename = destfilename + houzhui; part.write(dir+"\\"+destfilename); // InputStream ist = part.getInputStream(); // FileOutputStream fos = new FileOutputStream(dir+"\\"+destfilename); // byte[] bytes = new byte[1024]; // int size = -1; // while((size = ist.read(bytes))>0){ // fos.write(bytes, 0, size); // } // ist.close(); // fos.close(); return destfilename; } }
下载 流程
package com.sangewuxie.servlet; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.PrintStream; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.sangewuxie.dao.StudentDao; public class DownloadServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String xuehao = request.getParameter("xuehao"); String jianli = StudentDao.getName(xuehao,"jianli"); // System.out.println(jianli); if(jianli==null) { response.setContentType("text/html;charset=utf-8"); response.getWriter().write("未找到该生或该生不存在"); } else { String contentType = getServletContext().getMimeType(jianli); response.setContentType(contentType); response.setHeader("Content-Disposition", "attachment;filename="+jianli); String dir = request.getServletContext().getRealPath("")+"\\upload\\jianli\\"; String filename = dir+jianli; InputStream in = new FileInputStream(filename); OutputStream out = response.getOutputStream(); int len; while((len=in.read())!= -1) { out.write(len); } in.close(); out.close(); } } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }
保存到csv
package com.sangewuxie.servlet; import java.io.File; import java.io.FileWriter; import java.io.IOException; import java.io.OutputStream; import java.io.PrintStream; import java.net.URLEncoder; import java.util.ArrayList; import java.util.Iterator; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.sangewuxie.dao.StudentDao; import com.sangewuxie.domain.Student; public class SavecsvServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { int minAge = Integer.parseInt(request.getParameter("min")); int maxAge = Integer.parseInt(request.getParameter("max")); ArrayList<Student> students= StudentDao.getInfo(minAge,maxAge); response.setContentType("text/html;charset=utf-8"); if(students.isEmpty()) { response.getWriter().write("未找到该数据或者数据不存在"); } else { String filename = "从"+minAge+"到"+maxAge+"岁的信息.csv"; filename = URLEncoder.encode(filename,"UTF-8"); String contentType =getServletContext().getMimeType(filename); response.setContentType(contentType); response.setHeader("Content-Disposition", "attachment;filename="+filename); OutputStream out = response.getOutputStream(); PrintStream ps = new PrintStream(out); ps.println("学号,姓名,性别,年龄,身高,学院"); Iterator it = students.iterator(); while(it.hasNext()) { Student student= (Student) it.next(); ps.println(student.getXuehao()+","+student.getXingming()+","+student.getXingbie()+","+student.getNianling()+","+student.getShengao()+","+student.getXueyuan()); } ps.flush(); ps.close(); out.close(); } } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }
个人笔记。无需细看
标签：read -name max ted bsp hold tput upload extends
原文地址：http://www.cnblogs.com/sangewuxie/p/7694655.html
