spring mvc 3 学习从页面到后台
我的例子：注册到保存数据
1 前台页面，采用spring 标签[注意标红色部分]
register.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<form:form commandName="user" id="regform" name="regform">
<dl id=d_email>
<dt><label for=regEmail>电子邮箱:</label></dt>
<dd>
<input id=username class=inputtext type=text name=username />
<p><a href="#">电子邮箱作为账号的好处</a></p>
</dd>
</dl>
<dl>
<dt><label for=pwd>设置密码:</label></dt>
<dd><input id=pwd class=inputtext maxLength=20 type=password
name=password />
</dd>
</dl>
<dl class=dl_pad>
<dt><label for=nick>喜欢昵称:</label></dt>
<dd><input id="nick" name="nick" class=inputtext/>
</dd>
</dl>
<dl>
<dt></dt>
<dd><img id=verifypic src="resources/images/getcode.jpg" /><a
href="javascript:refreshCode();">看不清换一张?</a></dd>
</dl>
<dl>
<dt><label for=code>验证码:</label></dt>
<dd><input id=icode class="inputtext validate-code" maxLength=5
size=5 type=text name=icode /><span id=icode_error_span class=box-error><b
id=icode_error_span_i></b></span></dd>
</dl>
<dl>
<dt> </dt>
<dd><input class="submit" type="submit" value="立即注册"/></dd>
</dl>
</form:form>
后台：
package com.lsoba.ucenter.controller;
import javax.inject.Inject;
import javax.inject.Named;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.lsoba.model.UserAccount;
import com.lsoba.ucenter.service.UserService;
import com.lsoba.ucenter.service.UserValidator;
@Controller
@RequestMapping("/reg.htm")
public class RegController {
private static final Logger log = LoggerFactory
.getLogger(RegController.class);
@Inject
@Named("userService")
UserService userService;
@Inject
@Named("userValidator")
UserValidator userValidator;
/**
* 显示注册页面
*
* @return
*/
@RequestMapping(params = "m=show")
public String showReg(@ModelAttribute("user") UserAccount user,ModelMap model) {
/*如果把红色部分去掉就会报，Neither Errors instance nor plain target object for bean name 'command'
available as request attribute model.addAttribute(user);
错误，表示非控制访问控制表单，意思就是页面的 <form:form commandName="user" id="regform" name="regform">
才会起到作用。
*/
log.info("into reg page");
return "/usercenter/register";
}
/**
* 保存用户信息
*
* @return
*/
@RequestMapping(params = "m=save", method = RequestMethod.POST)
public String saveUserInfo(@ModelAttribute("user") UserAccount user,ModelMap model) {
model.addAttribute(user);
return "";
}
}
访问时：http://localhost:8080/reg.htm?m=show
可以进入注册页面。