编写一个客户信息新增登记页面，分别使用 4 种方式，把登记的信息在结果信息中显示出来-CFANZ编程社区

目的：

学会编写 springMVC 的注解程序
学会编写 springMVC 的配置，类方式参数传递,向下一个页传递数据

完成内容

使用 springMVC 编写用户登录页面
1. 在登录成功页面显示登录的信息
2. 只需要用户名称信息，不需要密码信息
编写一个客户信息新增登记页面，使用类方式传递进行参数传递
编写一个客户信息新增登记页面，分别使用 4 种方式，把登记的信息在结果信息中显示出来

userReg.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<body>
<h1>用户注册</h1>
<hr>
<form action="user/userReg.do" method="post">
<p>用户编号:
    <input name="usrNo"></p>
<p>用户姓名:
    <input name="usrName"></p>
<p>用户密码:
    <input name="usrPswd" type="password"></p>
<p>确认密码:
    <input name="pswdConfirm" type="password"></p>
<p>入职日期:
    <input name="usrHiredate" title="yyyy-mm-dd"></p>
<p>
    <input type="submit" value="注册"></p>
</form>
</body>

userRegTo.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="x" uri="http://java.sun.com/jsp/jstl/xml" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<body>
    userNo:${usrNo}<br>
    userName:${usrName}<br>
    user:${user}
</body>

User.java

package com.yang.pojo;

public class User {
    private String usrNo;
    private String usrName;
    private String usrPswd;

    public String getUsrNo() {
        return usrNo;
    }

    public void setUsrNo(String usrNo) {
        this.usrNo = usrNo;
    }

    public String getUsrName() {
        return usrName;
    }

    public void setUsrName(String usrName) {
        this.usrName = usrName;
    }

    public String getUsrPswd() {
        return usrPswd;
    }

    public void setUsrPswd(String usrPswd) {
        this.usrPswd = usrPswd;
    }

    @Override
    public String toString() {
        return "User{" +
                "usrNo='" + usrNo + '\'' +
                ", usrName='" + usrName + '\'' +
                ", usrPswd='" + usrPswd + '\'' +
                '}';
    }
}

UserController.java

第一种方法

package com.yang.controller;

import com.yang.pojo.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("user")
public class UserController {
    @RequestMapping("userReg.do")
    public String userReg(String usrNo, String usrName, User user,
                          Model model){
        model.addAttribute("usrNo",usrNo);
        model.addAttribute("usrName",usrName);
        model.addAttribute("user",user);
        return "userRegTo";
    }
}

第二种方法

package com.yang.controller;

import com.yang.pojo.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Controller
@RequestMapping("user")
public class UserController {
    @RequestMapping("userReg.do")
    public String userReg( User user,
                          HttpServletRequest req){
        String usrNo = req.getParameter("usrNo");
        String usrName = req.getParameter("usrName");
        return "userRegTo"; 
    }
}

第三种方法

package com.yang.controller;

import com.yang.pojo.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Controller
@RequestMapping("user")
public class UserController {
    @RequestMapping("userReg.do")
    public String userReg( User user,String usrNo,String usrName,
                          HttpServletRequest req){

        req.setAttribute("usrNo",usrNo);
        req.setAttribute("usrName",usrName);
        return "userRegTo"; 
    }
}

第四种方法

package com.yang.controller;

import com.yang.pojo.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Controller
@RequestMapping("user")
public class UserController {
    @RequestMapping("/userAddMav.do")
    public ModelAndView userAddMav(User user){
        ModelAndView mav = new ModelAndView("userRegTo");
        mav.addObject("user",user);
        return mav;
    }
}