spring mvc 接收表单 bean

时间：2018-05-03 19:36:38 阅读：165 评论：0 收藏：0 [点我收藏+]

标签：mode word tst control page public www splay verify

spring MVC如何接收表单bean 呢？

之前项目中MVC框架一直用struts2，所以我也就按照struts2 的思维来思考

页面loginInput.jsp：

Html代码

<?xml version="1.0" encoding="UTF-8" ?>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Insert title here</title>
</head>
<body>
<center>
<font color="red" >${message }</font>
<form action="<%=path %>/user/loginVerify">
<table>
<tr>
<td>身份证:</td>
<td> <input type="text" name="user.identity" /> </td>
</tr>
<tr>
<td>用户编号:</td>
<td><input type="text" name="user.studentID" /> </td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="login"/>
</td>
</tr>
</table>
</form>
</center>
</body>
</html>

<?xml version="1.0" encoding="UTF-8" ?><%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><%    String path = request.getContextPath();    String basePath = request.getScheme() + "://"            + request.getServerName() + ":" + request.getServerPort()            + path + "/";%><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Insert title here</title></head><body>    <center>        <font color="red" >${message }</font>        <form action="<%=path %>/user/loginVerify">            <table>                <tr>                    <td>身份证:</td>                    <td> <input type="text" name="user.identity"  /> </td>                </tr>                <tr>                    <td>用户编号:</td>                    <td><input type="text" name="user.studentID"  /> </td>                </tr>                <tr>                    <td colspan="2">                    <input type="submit"  value="login"/>                    </td>                </tr>            </table>        </form>            </center>    </body></html>

控制器LoginController 中登录的方法：

Java代码

/***
* 校验登录用户
*
* @param session
* @param user
* @return
* @throws UnsupportedEncodingException
* @throws Exception
*/
@RequestMapping(value = "/loginVerify")
public String login(User user, HttpSession session,
Map<String, Object> map,Model model) throws UnsupportedEncodingException,
Exception {
User user2 = null;
if (user.getIdentity() == null) {
map.put("message", "请输入身份证");
return "loginInput";
}
map.put("identity", user.getIdentity());
model.addAttribute("identity", user.getIdentity());
System.out.println("identity:"+session.getAttribute("identity"));
user2 = this.userDao.getByIdentityAndStudentID(new User(user.getIdentity(),
user.getStudentID()));
System.out.println("user2:" + user2);
if (user2 != null) {
return "welcome";
} else {
map.put("message", "身份证和用户编号有误，请重新登录");
return "loginInput";
}
}

/***     * 校验登录用户     *      * @param session     * @param user     * @return     * @throws UnsupportedEncodingException     * @throws Exception     */    @RequestMapping(value = "/loginVerify")    public String login(User user, HttpSession session,            Map<String, Object> map,Model model) throws UnsupportedEncodingException,            Exception {        User user2 = null;        if (user.getIdentity() == null) {            map.put("message", "请输入身份证");            return "loginInput";        }        map.put("identity", user.getIdentity());        model.addAttribute("identity", user.getIdentity());        System.out.println("identity:"+session.getAttribute("identity"));        user2 = this.userDao.getByIdentityAndStudentID(new User(user.getIdentity(),                user.getStudentID()));        System.out.println("user2:" + user2);        if (user2 != null) {            return "welcome";        } else {            map.put("message", "身份证和用户编号有误，请重新登录");            return "loginInput";        }    }

我认为页面表单中name为user.identity 和user.studentID的元素会自动注入到上述方法的变量User user 中，结果没有！！！？

实体类User：

Java代码

package com.springmvc.entity;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
/***
* father class
* @author huangwei
*
*/
@Entity
public class User {
private int id;
/**
* 身份证
*/
private String identity;
/***
* 用户编号
*/
private String studentID;
private String username;
public User() {
super();
}
public User(String identity, String studentID) {
super();
this.identity = identity;
this.studentID = studentID;
}
@Id
@GeneratedValue
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getIdentity() {
return identity;
}
public void setIdentity(String identity) {
this.identity = identity;
}
public String getStudentID() {
return studentID;
}
public void setStudentID(String studentID) {
this.studentID = studentID;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
}

package com.springmvc.entity;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;/*** * father class * @author huangwei * */@Entitypublic  class User {    private int id;    /**     * 身份证     */    private String identity;    /***     * 用户编号     */    private String studentID;    private String username;        public User() {        super();    }    public User(String identity, String studentID) {        super();        this.identity = identity;        this.studentID = studentID;    }    @Id    @GeneratedValue    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    public String getIdentity() {        return identity;    }    public void setIdentity(String identity) {        this.identity = identity;    }    public String getStudentID() {        return studentID;    }    public void setStudentID(String studentID) {        this.studentID = studentID;    }    public String getUsername() {        return username;    }    public void setUsername(String username) {        this.username = username;    }    }

原来，spring MVC 跟struts2的注入方式不一样！！

后来我把页面中的name属性改为identity 和studentID 就好了：

<tr>

</tr>

<tr>

</tr>

这就是spring MVC与struts2 ioc不同的地方！

spring mvc 接收表单 bean

标签：mode word tst control page public www splay verify

原文地址：https://www.cnblogs.com/jpfss/p/8986470.html

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