servlet接受form表单d值和文件上传

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ApacheCommons组件 commons-fileupload-1.3.2.jar和commons-io_2.4.jar

Servlet页面

package com.studentweb.mode;import java.io.File;import java.io.IOException;import java.io.UnsupportedEncodingException;import java.util.HashMap;import java.util.Iterator;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.fileupload.FileItem;import org.apache.commons.fileupload.FileUploadException;import org.apache.commons.fileupload.disk.DiskFileItemFactory;import org.apache.commons.fileupload.servlet.ServletFileUpload;import com.studentweb.control.StudentUtil;@SuppressWarnings("serial")public class AddStudent extends HttpServlet {@SuppressWarnings("rawtypes")public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {StudentUtil showStudent = new StudentUtil();DiskFileItemFactory factory = new DiskFileItemFactory();ServletFileUpload diskFileUpload = new ServletFileUpload(factory);diskFileUpload.setHeaderEncoding("utf-8");// 定义一个hashmap存放请求参数HashMap<String, String> parameters = new HashMap<String, String>();List paramItems = null;try {paramItems = diskFileUpload.parseRequest(request);} catch (FileUploadException e) {e.printStackTrace();}Iterator i = paramItems.iterator();// 依次出来每个文件 请求参数while (i.hasNext()) {FileItem fi = (FileItem) i.next();if (!fi.isFormField()) {//判断是文件还是 value值String fileName = fi.getName();String savaFile = "images/" + fileName;String filePath = getServletContext().getRealPath("/")+ savaFile;File file = new File(filePath);try {fi.write(file);} catch (Exception e) {e.printStackTrace();}parameters.put("header_url", savaFile);} else {String name = fi.getFieldName();String value = null;try {value = fi.getString("utf-8");} catch (UnsupportedEncodingException e) {e.printStackTrace();}parameters.put(name, value);}}String name = parameters.get("name");String Age = parameters.get("age");String grade = parameters.get("grade");String gender = parameters.get("gender");String headerUrl = parameters.get("header_url");int age = Integer.parseInt(Age);boolean a = showStudent.SelectStudent(name);if (a) {response.sendRedirect("/StudentWebV_2.1/StudentThereare.html");} else {showStudent.addStudnet(grade, name, age, gender, headerUrl);response.sendRedirect("/StudentWebV_2.1/jump.html");}}}

JSP页面

<!DOCTYPE html><html><head><meta charset="UTF-8"><link rel="stylesheet" type="text/css" href="css/bootstrap.css" /><style type="text/css">body {font-size: 20px;padding-bottom: 40px;background-color: white;}.sidebar-nav {padding: 9px 0;}@media ( max-width : 980px) { /* Enable use of floated navbar text */.navbar-text.pull-right {float: none;padding-left: 5px;padding-right: 5px;}}.btn {position: absolute;top: 30%;left: 40%;color: blue;font-size: 20px;}</style><script type="text/javascript">function checkInput() {var name = document.form1.name1.value;var age = document.form1.age.value;var a =isNaN(age);if(name == "") {alert("请输入姓名!");return false;} else if(age == "") {alert("请输入年龄!");return false;} else if(a){alert("年龄有误!");return false;}else{return true;}}</script></head><body><form name="form1" action="servlet/AddStudent" method="post"onsubmit="return checkInput()" enctype="multipart/form-data"><table class="table table-bordered table-hover m10"style="margin-left:10px;margin-top:3px;"><tr><td class="tableleft">姓名</td><td><input type="text" name="name" /></td><td class="tableleft">年龄</td><td><input type="text" name="age" /></td></tr><br><tr><br><td width="10%" class="tableleft">学生班级</td><td><select name="grade"><option value='java' /> Java<option value='安卓' /> 安卓</select><td width="10%" class="tableleft">学生性别</td><td><select name="gender"><option value='男' /> 男<option value='女' /> 女</select> <br />头像: <input type="file" name="myfile" /><br> <input type="submit" value="提交" class="btn"></form></body></html>

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