5.SpringMVC映射器和适配器配置(annotation)

Posted on Edited on In

 

项目工程目录:

项目依赖jar包:

Vo: User

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
package com.course.vo;

public class User {

	private Integer id;
	private String name;
	private Integer age;
	
	public User() {
		super();
	}
	
	public User(Integer id, String name, Integer age) {
		super();
		this.id = id;
		this.name = name;
		this.age = age;
	}
	
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Integer getAge() {
		return age;
	}
	public void setAge(Integer age) {
		this.age = age;
	}	
}

Controller

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
package com.course.controller;

import java.util.ArrayList;
import java.util.List;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

import com.course.vo.User;

@Controller
@RequestMapping("user")
public class UserController {

	@RequestMapping("getUserList5")
	public ModelAndView getUserList5() {
		List<User> userList = new ArrayList<>();
		User user;
		for (int i = 0; i < 5; i++) {
			user = new User(i, "name" + i, 10 + i);
			userList.add(user);
		}
		
		// 封装页面地址和发送到页面的数据
		ModelAndView modelAndView = new ModelAndView();
		
		// 相当于httpServletRequest.setAttribute();
		modelAndView.addObject("userList", userList);
		
		// 相当于httpServletRequest.getRequestDispatcher("/WEB-INF/view/UserList.jsp").forward(httpServletRequest, httpServletResponse);
		modelAndView.setViewName("/WEB-INF/view/UserList.jsp");
		
		return modelAndView;
	}
	
	@RequestMapping("getUserList10")
	public ModelAndView getUserList10() {
		List<User> userList = new ArrayList<>();
		User user;
		for (int i = 0; i < 10; i++) {
			user = new User(i, "name" + i, 10 + i);
			userList.add(user);
		}
		
		// 封装页面地址和发送到页面的数据
		ModelAndView modelAndView = new ModelAndView();
		
		// 相当于httpServletRequest.setAttribute();
		modelAndView.addObject("userList", userList);
		
		// 相当于httpServletRequest.getRequestDispatcher("/WEB-INF/view/UserList.jsp").forward(httpServletRequest, httpServletResponse);
		modelAndView.setViewName("/WEB-INF/view/UserList.jsp");
		
		return modelAndView;
	}
	
	@RequestMapping("getUserList20")
	public ModelAndView getUserList20() {
		List<User> userList = new ArrayList<>();
		User user;
		for (int i = 0; i < 20; i++) {
			user = new User(i, "name" + i, 10 + i);
			userList.add(user);
		}
		
		// 封装页面地址和发送到页面的数据
		ModelAndView modelAndView = new ModelAndView();
		
		// 相当于httpServletRequest.setAttribute();
		modelAndView.addObject("userList", userList);
		
		// 相当于httpServletRequest.getRequestDispatcher("/WEB-INF/view/UserList.jsp").forward(httpServletRequest, httpServletResponse);
		modelAndView.setViewName("/WEB-INF/view/UserList.jsp");
		
		return modelAndView;
	}
	
	@RequestMapping(value = {"searchUserList", "getUserList", "queryUserList"}, method = RequestMethod.GET)
	public ModelAndView getUserList() {
		List<User> userList = new ArrayList<>();
		User user;
		for (int i = 0; i < 2; i++) {
			user = new User(i, "name" + i, 10 + i);
			userList.add(user);
		}
		
		// 封装页面地址和发送到页面的数据
		ModelAndView modelAndView = new ModelAndView();
		
		// 相当于httpServletRequest.setAttribute();
		modelAndView.addObject("userList", userList);
		
		// 相当于httpServletRequest.getRequestDispatcher("/WEB-INF/view/UserList.jsp").forward(httpServletRequest, httpServletResponse);
		modelAndView.setViewName("/WEB-INF/view/UserList.jsp");
		
		return modelAndView;
	}
}

springmvc.xml

控制器映射器、控制器适配器、视图解析器的<bean>节点配置可以去除，只保留<context:component-scan base-package=""></context:component-scan>节点。

添加了<mvc:annotation-driven></mvc:annotation-driven>之后，控制器映射器、控制器适配器、视图解析器的<bean>节点配置可以去除。

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
<?xml version="1.0" encoding="UTF-8"?>

<!-- 头文件 -->
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
	    http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
		http://www.springframework.org/schema/mvc/spring-mvc.xsd">
		

	<!-- 
		配置控制器
		包扫描
	 -->
	<context:component-scan base-package="com.course.controller"></context:component-scan>
	
	<!-- 
		配置控制器映射器
		在spring3.1之前使用org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping注解映射器。
		在spring3.1之后使用org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping注解映射器。
	 -->
	<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>
	
	
	<!-- 
		配置控制器适配器
		在spring3.1之前使用org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter注解适配器。
		在spring3.1之后使用org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter注解适配器。
	 -->
	<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>
	
	<!-- 配置视图解析器 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"></bean>
	
	<!-- 
		合并注解的控制器映射器和控制器适配器的配置
		对控制器映射器和控制器适配器进行加强，如把对象转化为json字符串
	 -->
	<mvc:annotation-driven></mvc:annotation-driven>
	
</beans>

web.xml

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>01_springmvc_hello</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <!-- 配置前端控制器 -->
  <servlet>
  	<servlet-name>springmvc</servlet-name>
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	
  	<!-- 加载springmvc.xml -->
  	<init-param>
  		<param-name>contextConfigLocation</param-name>
  		<param-value>classpath:springmvc.xml</param-value>
  	</init-param>
  	
  	<!-- 启动加载 -->
  	<load-on-startup>1</load-on-startup>
  	
  </servlet>
  
  <servlet-mapping>
  	<servlet-name>springmvc</servlet-name>
  	<url-pattern>*.do</url-pattern>
  </servlet-mapping>
  
</web-app>

UserList.jsp

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
	<h1>User List</h1>
	<hr/>
	<table align="center" width="60%" border="1" cellspacing="5">
		<thead>
			<tr>
				<th>Id</th>
				<th>Name</th>
				<th>Age</th>
			<tr>
		</thead>
		<tbody>
			<c:forEach var="user" items="${userList}">
				<tr>
					<td>${user.id}</td>
					<td>${user.name}</td>
					<td>${user.age}</td>
				</tr>
			</c:forEach>
		</tbody>
	</table>
</body>
</html>

log4j.properties

1
2
3
4
5
6
7
8
# Global logging configuration
log4j.rootLogger=INFO, stdout
# MyBatis logging configuration...
log4j.logger.org.mybatis.example.BlogMapper=TRACE
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

启动Tomcat

浏览器访问: http://localhost:8080/01_springmvc_init/user/getUserList5.do

浏览器访问: http://localhost:8080/01_springmvc_init/user/getUserList10.do

浏览器访问: http://localhost:8080/01_springmvc_init/user/getUserList20.do

浏览器访问: 

1
2
3
http://localhost:8080/01_springmvc_init/user/searchUserList.do
http://localhost:8080/01_springmvc_init/user/getUserList.do
http://localhost:8080/01_springmvc_init/user/queryUserList.do