springmvc数据回显(九)

来源：互联网发布：c语言编写玫瑰花编辑：程序博客网时间：2024/05/19 22:45

1.定义一个pojo类

package com.study.domain;import java.io.Serializable;import java.util.Date;@SuppressWarnings("serial")public class User implements Serializable{    private Integer id;    private String userName;    private Integer age;    private Date birthday;    public Integer getId() {        return id;    }    public void setId(Integer id) {        this.id = id;    }    public String getUserName() {        return userName;    }    public void setUserName(String userName) {        this.userName = userName;    }    public Integer getAge() {        return age;    }    public void setAge(Integer age) {        this.age = age;    }    public Date getBirthday() {        return birthday;    }    public void setBirthday(Date birthday) {        this.birthday = birthday;    }    @Override    public String toString() {        return "User [id=" + id + ", userName=" + userName + ", age=" + age + ", birthday=" + birthday + "]";    }}

2.后台获取数据

    @RequestMapping("/showList")    public String showList(Model model){        User user = new User();        user.setId(1);        user.setUserName("兰陵王");        user.setAge(16);        user.setBirthday(new Date());        User user2 = new User();        user2.setId(2);        user2.setUserName("花木兰");        user2.setAge(17);        user2.setBirthday(new Date());        User user3 = new User();        user3.setId(3);        user3.setUserName("孙尚香");        user3.setAge(18);        user3.setBirthday(new Date());        List<User> list = new ArrayList<User>();        list.add(user);        list.add(user2);        list.add(user2);        model.addAttribute("userList", list);        return "list";    }

3.页面获取list循环

<body>    <table border="1px" >        <tr>            <td>id</td>            <td>姓名</td>            <td>年龄</td>            <td>生日</td>            <td>操作</td>        </tr>        <c:forEach items="${userList}" var="user">            <tr>                <td>${user.id }</td>                <td>${user.userName }</td>                <td>${user.age }</td>                <td>${user.birthday }</td>                <td>                    <a href="${pageContext.request.contextPath }/user/edit.do?id=${user.id }" type="button">修改</a>                </td>            </tr>        </c:forEach>    </table>

注:页面中的 items=”${userList}”,userList需与后台存的model.addAttribute(“userList”, list);,userList一致

4.参数修改
点击修改将参数传递后台,通过id获取数据

@RequestMapping("edit")    public String edit(Integer id, Model model){        User user3 = new User();        user3.setId(id);        user3.setUserName("孙尚香");        user3.setAge(18);        user3.setBirthday(new Date());        model.addAttribute("user", user3);        return "edit";    }

5.页面书籍编辑

<body>    id:<input name="id" value="${user.id }"/><br/>    姓名:<input name="id" value="${user.userName }"/><br/>    年龄:<input name="id" value="${user.age }"/><br/>    生日:<input name="id" value="${user.birthday }"/><br/>    <a href="${pageContext.request.contextPath }/user/showList.do" type="button">返回</a></body>

显示效果

注:参数回显都是通过springmvc的Model对象来实现的

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