BeanUtils工具类
1 使用BeanUtils进行自动映射封装
1 html代码
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head></head> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>会员注册</title> <link rel="stylesheet" href="css/bootstrap.min.css" type="text/css" /> <script src="js/jquery-1.11.3.min.js" type="text/javascript"></script> <script src="js/bootstrap.min.js" type="text/javascript"></script> <!-- 引入自定义css文件 style.css --> <link rel="stylesheet" href="css/style.css" type="text/css" /> <style> body { margin-top: 20px; margin: 0 auto; } .carousel-inner .item img { width: 100%; height: 300px; } font { color: #3164af; font-size: 18px; font-weight: normal; padding: 0 10px; } </style> </head> <body> <!-- 引入header.jsp --> <jsp:include page="/header.jsp"></jsp:include> <div class="container" style="width: 100%; background: url('image/regist_bg.jpg');"> <div class="row"> <div class="col-md-2"></div> <div class="col-md-8" style="background: #fff; padding: 40px 80px; margin: 30px; border: 7px solid #ccc;"> <font>会员注册</font>USER REGISTER <form class="form-horizontal" style="margin-top: 5px;" action="/WEBTest13/register" method="post"> <div class="form-group"> <label for="username" class="col-sm-2 control-label">用户名</label> <div class="col-sm-6"> <input type="text" class="form-control" id="username" name="username" placeholder="请输入用户名"> </div> </div> <div class="form-group"> <label for="inputPassword3" class="col-sm-2 control-label">密码</label> <div class="col-sm-6"> <input type="password" class="form-control" id="inputPassword3" name="password" placeholder="请输入密码"> </div> </div> <div class="form-group"> <label for="confirmpwd" class="col-sm-2 control-label">确认密码</label> <div class="col-sm-6"> <input type="password" class="form-control" id="confirmpwd" placeholder="请输入确认密码"> </div> </div> <div class="form-group"> <label for="inputEmail3" class="col-sm-2 control-label">Email</label> <div class="col-sm-6"> <input type="email" class="form-control" id="inputEmail3" name="email" placeholder="Email"> </div> </div> <div class="form-group"> <label for="usercaption" class="col-sm-2 control-label">姓名</label> <div class="col-sm-6"> <input type="text" class="form-control" id="usercaption" name="name" placeholder="请输入姓名"> </div> </div> <div class="form-group opt"> <label for="inlineRadio1" class="col-sm-2 control-label">性别</label> <div class="col-sm-6"> <label class="radio-inline"> <input type="radio" name="sex" id="inlineRadio1" value="option1"> 男 </label> <label class="radio-inline"> <input type="radio" name="sex" id="inlineRadio2" value="option2"> 女 </label> </div> </div> <div class="form-group"> <label for="date" class="col-sm-2 control-label">出生日期</label> <div class="col-sm-6"> <input type="date" class="form-control" name="birthday"> </div> </div> <div class="form-group"> <label for="date" class="col-sm-2 control-label">验证码</label> <div class="col-sm-3"> <input type="text" class="form-control"> </div> <div class="col-sm-2"> <img src="./image/captcha.jhtml" /> </div> </div> <div class="form-group"> <div class="col-sm-offset-2 col-sm-10"> <input type="submit" width="100" value="注册" name="submit" style="background: url('./images/register.gif') no-repeat scroll 0 0 rgba(0, 0, 0, 0); height: 35px; width: 100px; color: white;"> </div> </div> </form> </div> <div class="col-md-2"></div> </div> </div> <!-- 引入footer.jsp --> <jsp:include page="/footer.jsp"></jsp:include> </body> </html>
2 User类代码
package p5.request; public class User { private String uid; private String username; private String password; private String name; private String email; private String sex; private String birthday; public String getUid() { return uid; } public void setUid(String uid) { this.uid = uid; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } public String getBirthday() { return birthday; } public void setBirthday(String birthday) { this.birthday = birthday; } @Override public String toString() { return "User [uid=" + uid + ", username=" + username + ", password=" + password + ", name=" + name + ", email=" + email + ", sex=" + sex + ", birthday=" + birthday + "]"; } }
3 servlet测试代码
package p5.request; import java.io.IOException; import java.lang.reflect.InvocationTargetException; import java.util.Map; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.beanutils.BeanUtils; public class RegisterServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 设置request的编码，只适合post方式 request.setCharacterEncoding("UTF-8"); //使用BeanUtils进行自动映射封装 //BeanUtils工作原理：将map中的数据 根据key与实体的属性的对应关系封装 //只要key的名字与实体的属性 的名字一样 就自动封装到实体中 Map<String, String[]> parameterMap = request.getParameterMap(); User user = new User(); try { BeanUtils.populate(user, parameterMap); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } System.out.println(user.toString()); //现在这个位置 user对象已经封装好了 } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }
运行结果如下：
