spring mvc 前后台数据交互

最新推荐文章于 2022-10-11 09:04:31 发布

原创最新推荐文章于 2022-10-11 09:04:31 发布 · 240 阅读

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本文介绍Spring MVC框架中如何处理HTTP请求参数，包括直接使用方法参数接收及通过HttpServletRequest对象获取参数的方式，并展示了如何利用Thymeleaf模板引擎实现表单字段与Java对象之间的自动绑定。

1.参数对应

java端：

	@RequestMapping(value="/test",method = RequestMethod.POST)
	public String submit(String name,Model model){
		//String name = request.getParameter("name");
        mailClient.send("dongkun01@vcredit.com", name);		
		model.addAttribute("username",name);
		return "account/testhome";
	}

HTML:

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org"
	  xmlns:social="http://spring.io/springsocial"
	  xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout"
	  layout:decorator="layout">
	<head>
		<title>用户登录</title>
	</head>
	<body>
		<div id="content" layout:fragment="content">
			<form action="#" method="POST" th:action="@{/app/account/test}">
			<p>
				登录名：<input name="name" type="text"></input>
			</p>
			<p>
				<button type="submit">登录</button>
			</p>
			
			</form>
		</div>	
	</body>
</html>

2.HttpServletRequest处理参数

java端：

@RequestMapping(value="/test",method = RequestMethod.POST)
	public String submit(HttpServletRequest request){
		String name = request.getParameter("name");
		return "account/testhome";
	}

HTML：

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org"
	  xmlns:social="http://spring.io/springsocial"
	  xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout"
	  layout:decorator="layout">
	<head>
		<title>用户登录</title>
	</head>
	<body>
		<div id="content" layout:fragment="content">
			<form action="#" method="POST" th:action="@{/app/account/test}">
			<p>
				登录名：<input name="name" type="text"></input>
			</p>
			<p>
				<button type="submit">登录</button>
			</p>
			
			</form>
		</div>	
	</body>
</html>

3.thymeleaf对应

	@RequestMapping(value="/register", method=RequestMethod.POST)
	public String RegisterFormSubmit(@ModelAttribute CredentialUser user,Model model){
		register.registerAccount(user.getUsername(),"", "");
		auth.register(user.getUsername(), user.getPassword());
		model.addAttribute("user", user);
		return "account/home";
	}

HTML：

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org"
	  xmlns:social="http://spring.io/springsocial"
	  xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout"
	  layout:decorator="layout">
	<head>
		<title>用户注册</title>
	</head>
	<body>
		<div id="content" layout:fragment="content">
			<form action="#" method="POST" th:action="@{/app/account/register}" th:object="${user}">
			<p>
				登录名：<input th:field="*{username}" type="text"></input>
			</p>
			<p>
				密码：<input th:field="*{password}" type="password"></input>
			</p>
			<p>
			</p>
<!-- 			<p> -->
<!-- 				验证码：<input th:field="verifyCode" type="text"></input><img alt="验证码" src=""></img> -->
<!-- 			</p> -->
			<p>
				<button type="submit">注册</button>
			</p>
			
			
			</form>
		</div>	
	</body>
</html>