一个SpringMVC demo_springmvc apo demo-优快云博客

本文链接：https://blog.youkuaiyun.com/wujinsong2010/article/details/30117687

1.项目整体结构图如下

2.服务层代码如下

package org.app.demo.spring.service;

/**
 * 
 * @author wujinsong
 *
 */
public interface HelloWorldService {
	public String getNewName(String userName);

}

package org.app.demo.spring.service.impl;

import org.app.demo.spring.service.HelloWorldService;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
public class HelloWorldServiceImpl implements HelloWorldService {

	@Override
	@Transactional
	public String getNewName(String userName) {
		return "Hello Spring!" + userName;
	}

}

3.控制层代码

package org.app.demo.spring.controller;

import javax.servlet.http.HttpServletRequest;

import org.app.demo.spring.service.HelloWorldService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

@Controller
@RequestMapping("/helloworld.do")
public class HelloWorldController {

	@Autowired
	private HelloWorldService helloWorldService;

	@RequestMapping
	public String getNewName(@RequestParam("userName") String userName,
			HttpServletRequest request) {
		String newUserName = helloWorldService.getNewName(userName);
		request.setAttribute("newUserName", newUserName);

		return "helloworld";
	}

}

4.视图层代码

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<!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>Insert title here</title>
</head>
<body>
	<form action="helloworld.do" method="post">
		请输入姓名：<input type="text" name="userName"> <input type="submit"
			value="提交"> <br />
	</form>
</body>
</html>

helloworld.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!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>Insert title here</title>
</head>
<body>
	<%=request.getAttribute("newUserName") %>
</body>
</html>