spring session实现session统一管理(jdbc实现)
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
本文来自博客园，作者：huan1993，转载请注明原文链接：https://www.cnblogs.com/huan1993/p/15416233.html
