Spring MVC 学习笔记7 —— 实现简单的用户管理（3）修改和删除

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Spring MVC 学习笔记7 —— 实现简单的用户管理（3）修改和删除

1.修改功能：

浏览器请求url: {url}/user/<username>/update

//7. update, 先有一个GET到 update。jsp, 再有一个POST完成修改@RequestMapping(value="/{username}/update", method=RequestMethod.GET)public String update(@PathVariable String username, Model model){model.addAttribute("user",users.get(username));<span style="white-space:pre"></span>//"users" 改成 "users2", jsp中改成users2,可以显示，但提交空密码提示报错！//model.addAttribute(users.get(username));return "user/update";}@RequestMapping(value="/{username}/update", method=RequestMethod.POST)public String update(@PathVariable String username, @Validated User user, BindingResult mybR){users.put(username, user);if (mybR.hasErrors()){return "user/update";//实际没有这个页面请求的响应啊，怎么可以呢？username = null时就是这个页面}return "redirect:/user/users";//这个是客户端跳转}

对应的update.jsp文件：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>  <%@taglib uri="http://www.springframework.org/tags/form" prefix="sf"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>Update user</title></head><body><p>Here is the update page..</p><!-- prefix = sf(springform) 开始使用form 在这里. 没有写Action，直接提交会给 /add --><sf:form metod="post" modelAttribute="user">Username: <sf:input path="username"/><sf:errors path="username"></sf:errors><br/>Password: <sf:input path="password"/><sf:errors path="password"></sf:errors><br/>Nickname: <sf:input path="nickname"/><br/>Email:<sf:input path="email"/><sf:errors path="email"></sf:errors><br/><input type="submit" value="修改用户"/></sf:form></body></html>

2.删除功能

//8. Delete, @RequestMapping(value="/{username}/delete",method=RequestMethod.GET)<span style="white-space:pre"></span>//should use delete later on.public String delete(@PathVariable String username, Model model){//model.addAttribute(users, get(username));//users.remove(username);<span style="white-space:pre"></span>//直接删除return "redirect:/user/users";}

对应的delete.jsp页面：

none.

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