spring session实现session统一管理(jdbc实现)

huan1993

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spring session

最近在看一些关于spring session 的知识，特做一个笔记记录一下。

在项目中经常会遇到这么一种情况，同一个web项目有时需要部署多份，然后使用nginx实现负载均衡，那么遇到的问题就是，部署多份之后，如何实现一个session的共享功能。此时就可以使用spring session来实现。

参考网址：http://docs.spring.io/spring-session/docs/current/reference/html5/guides/httpsession-jdbc-xml.html

1.引入spring session 的jar包依赖。

<?xml version="1.0"?>
<project
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
	xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>com.huan.spring</groupId>
		<artifactId>spring-session-parent</artifactId>
		<version>0.0.1-SNAPSHOT</version>
	</parent>
	<artifactId>02_spring_session_jdbc</artifactId>
	<packaging>war</packaging>
	<name>02_spring_session_jdbc Maven Webapp</name>
	<url>http://maven.apache.org</url>
	<dependencies>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.session</groupId>
			<artifactId>spring-session-jdbc</artifactId>
			<type>pom</type>
		</dependency>
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
		</dependency>
		<dependency>
			<groupId>com.oracle</groupId>
			<artifactId>ojdbc14</artifactId>
		</dependency>
	</dependencies>
	<build>
		<finalName>02_spring_session_jdbc</finalName>
	</build>
</project>

spring 的版本:4.1.5.RELEASE spring session-jdbc的版本:1.2.0.RELEASE

二、配置spring session的配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
		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-4.1.xsd">
	<context:annotation-config />
	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
		init-method="init" destroy-method="close">
		<!-- 基本属性driverClassName、 url、user、password -->
		<property name="driverClassName" value="oracle.jdbc.OracleDriver" />
		<property name="url" value="jdbc:oracle:thin:@localhost:1521:orcl" />
		<property name="username" value="scott" />
		<property name="password" value="tiger" />
	</bean>
	<bean
		class="org.springframework.session.jdbc.config.annotation.web.http.JdbcHttpSessionConfiguration" />
	<bean
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<constructor-arg ref="dataSource" />
	</bean>
</beans>

三、配置web.xml

<?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_2_5.xsd"
	id="WebApp_ID" version="2.5">
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>
			classpath:spring-session.xml
		</param-value>
	</context-param>
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

	<filter>
		<filter-name>springSessionRepositoryFilter</filter-name>
		<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>springSessionRepositoryFilter</filter-name>
		<url-pattern>/*</url-pattern>
		<dispatcher>REQUEST</dispatcher>
		<dispatcher>ERROR</dispatcher>
	</filter-mapping>
</web-app>

四、编写测试代码

1.登录界面(login.jsp)

<body>
	<form action="LoginServlet" method="post">
		<table>
			<tbody>
				<tr>
					<td>用户名:</td>
					<td><input name="loginName" required="required" /></td>
				</tr>
				<tr>
					<td>密码:</td>
					<td><input type="password" name="password" required="required"></td>
				</tr>
			</tbody>
			<tfoot>
				<tr>
					<td colspan="2"><input type="submit" value="登录"></td>
				</tr>
			</tfoot>
		</table>
	</form>
</body>

2.后台的逻辑处理

@WebServlet("/LoginServlet")
public class LoginServlet extends HttpServlet {
	private static final long serialVersionUID = -8455306719565291102L;
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doPost(req, resp);
	}
	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) resp;
		request.setCharacterEncoding("UTF-8");
		String loginName = request.getParameter("loginName");
		String password = request.getParameter("password");
		request.getSession().setAttribute("login", true);
		request.getSession().setAttribute(loginName, password);
		response.sendRedirect(request.getContextPath() + "/show.jsp");
	}
}

3.展示界面(show.jsp ---> 没有登录访问次界面，直接跳到登录界面)

<body>
	输出session中的值:
	<%
	if (request.getSession().getAttribute("login") == null) {
		response.sendRedirect(request.getContextPath() + "/login.jsp");
	}
%>
	<%
		Enumeration<String> enumeration = request.getSession().getAttributeNames();
		while (enumeration.hasMoreElements()) {
			String key = enumeration.nextElement();
			Object value = request.getSession().getAttribute(key);
			out.println(key + " --- " + value);
		}
	%>
	<br>
	-----------------
	jsessionId:<%=request.getSession().getId() %>
	----------------------
	<%=request.getRemoteAddr()%>
	<%=request.getRemotePort()%>
	<%=request.getRemoteHost()%>
	<%=request.getRemoteUser()%>
	<%=request.getHeader("X-Real-IP")%>
	<%=request.getHeader("Host")%>
	<%=request.getHeader("X-Forwarded-For")%>
	<%=request.getLocalPort()%>
</body>

4.nginx的简单配置 --- 启动ngnix

5.分别启动2个tomcat容器

6.修改其中一个tomcat容器中的show.jsp的值，随便加一个内容，以示区分。

7.页面上访问

8.可以到oracle数据区中进行查询，用到的表

select * from SPRING_SESSION t;
select * from SPRING_SESSION_ATTRIBUTES t;

9.用到的sql语句所在的jar包目录

查看图片附件

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2016-05-23 23:30
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