SpringMVC jsp页面表单 与 后台bean的映射关系

    xiaoxiao2021-03-25  74

    如题,其实映射关系很简单,就是jsp页面的表单中的name属性,要与bean实体类的属性名对应。

    举个例子,JSP页面代码:

    <form action="${pageContext.request.contextPath}/user/login.do" method="post" οnsubmit="return checkForm()"> <h1>Login</h1> <div> <input type="text" placeholder="用户名" required="" id="username2" name="username" value="${user.username }"/> </div> <div> <input type="password" placeholder="密码" required="" id="password2" name="password3" value="${user.password }"/> </div> <div class="sure"> <input type="text" placeholder="验证码" required="" id="verificationcode" name="verificationcode"/> <button type="button" class="btn btn-md btn-warning change" οnclick="changeCode()">换一张</button> <img src="${pageContext.request.contextPath}/code/captcha-image.do" id="kaptchaImage" class="img-sty"/> </div> <div> <input type="submit" value="登    录" style="width: 92%;"/> </div> </form>

    后台bean代码:

    public class User { private Integer id; private String username; private String password; private String realname; private String userArea; private Integer userType; private Integer userState; private Date updateTime; private Date createTime; private String roleIds; /* 相应的getter,setter方法省略 */ }

    如上,jsp的表单中,username是可以正常映射的,但是 password就不行,因为name属性对应不上。

    另外,补充一点,据说在struts2框架中,这种映射关系有点不一样,如果是在struts2中,name属性要写成类似:

    <div> <input type="text" placeholder="用户名" required="" name="user.username" /> </div>

    这样才能获取得到哦。

    
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