表单数据"/>
Servlet获取表单数据
1.要获取表单数据,我们先要创建一个表单,这里我们创建一个用户注册表单reg.jsp。然后再创建一个显示用户注册信息的表单userinfo.jsp。至于如何显示那就是我们今天所讲解的。
reg.jsp<body>代码如下:
<body><center><h1>用户注册</h1><hr><form name="regForm" action="" method="post" ><table><tr><td>用户名:</td><td><input type="text" name="username" /></td></tr><tr><td>密码:</td><td><input type="password" name="mypassword" ></td> </tr><tr><td>电子邮箱:</td><td><input type="text" name="email" ></td> </tr><tr><td>性别:</td><td><input type="radio" name="gender" checked="checked" value="Male">男<input type="radio" name="gender" value="Female">女</td> </tr><tr><td colspan="2" align="center"><input type="submit" value="注册"/> <input type="reset" value="取消"/> </td></tr></table></form></center></body>
效果如下:
userinfo.jsp<body>代码如下:
<body><center> <h1>用户信息</h1><hr><table width="600" cellpadding="0" cellspacing="0" border="1"><tr><td class="title">用户名:</td><td class="content"></td></tr><tr><td class="title">密码:</td><td class="content"></td></tr><tr><td class="title">性别:</td><td class="content"></td></tr><tr><td class="title">E-mail:</td><td class="content"></td></tr></table></center></body>
效果如下(其中背景色,以及table宽度,我在<head>里声明了,这里就不贴出来了):
2.首先我们需要在src下创建一个实体类Users.java。代码如下:
package entity;
public class Users {private String username; private String mypassword; private String email; private String gender; public Users()
{}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getMypassword() {return mypassword;}public void setMypassword(String mypassword) {this.mypassword = mypassword;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}public String getGender() {return gender;}public void setGender(String gender) {this.gender = gender;}}
接下来我们创建一个处理用户注册的servlet类。因为我们表单提交方式是post,所以我们让doGet()做doPost()方法。如下所示:
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {doPost(request,response);}
先创建一个用户的实体类对象:Users u = new Users(); 创建变量:String username,mypassword,gender,email;
让变量接收用户打的值:username = request.getParameter("username"); mypassword = request.getParameter("mypassword");
gender = request.getParameter("gender"); email = request.getParameter("email");
然后我们把接收完的值填到用户所创建的对象当中:u.setUsername(username); u.setMypassword(mypassword); u.setGender(gender); u.setEmail(email);
在跳转到userinfo.jsp页面之前,把注册成功的用户对象保存在session中:request.getSession().setAttribute("regUser", u);
跳转到userinfo.jsp:request.getRequestDispatcher("../userinfo.jsp").forward(request,response);
利用javaBean来获取: <jsp:useBean id="regUser" class="entity.Users" scope="session"/> <jsp:getProperty name="regUser" property="username"/>
<jsp:getProperty name="regUser" property="mypassword"/> <jsp:getProperty name="regUser" property="gender"/> <jsp:getProperty name="regUser" property="email"/>
具体代码如下:
<body><center> <jsp:useBean id="regUser" class="entity.Users" scope="session"/> <h1>用户信息</h1><hr><table width="600" cellpadding="0" cellspacing="0" border="1"><tr><td class="title">用户名:</td><td class="content"><jsp:getProperty name="regUser" property="username"/></td></tr><tr><td class="title">密码:</td><td class="content"><jsp:getProperty name="regUser" property="mypassword"/></td></tr><tr><td class="title">性别:</td><td class="content"><jsp:getProperty name="regUser" property="gender"/></td></tr><tr><td class="title">E-mail:</td><td class="content"><jsp:getProperty name="regUser" property="email"/></td></tr></table></center></body>
效果如下:
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Servlet获取表单数据
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