有很多关于如何完成此任务的文件,但我仍然无法解决我的问题。我刚接触servlet,所以我可能错过了一些东西。
我使用red5使用tomcat 6来创建一个servlet,它使用一个用于数据库操作的MysqlDb类的spring bean。
当我使用端口5080指向red5时,它充当常规的tomcat服务器,我可以浏览jsp和servlet页面。
我的web.xml包含以下相关信息:
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>fbauth</servlet-name>
<servlet-class>com.xpogames.FbAuth</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>fbauth</servlet-name>
<url-pattern>/fbauth</url-pattern>
</servlet-mapping>
我的applicationContext.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<bean id="placeholderConfig" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="/WEB-INF/red5-web.properties" />
</bean>
<bean id="idDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName"><value>${db.driver}</value></property>
<property name="url"><value>${db.url}</value></property>
<property name="username"><value>${db.username}</value></property>
<property name="password"><value>${db.password}</value></property>
<property name="poolPreparedStatements"><value>true</value></property>
<property name="maxActive"><value>10</value></property>
<property name="maxIdle"><value>10</value></property>
</bean>
<bean id="MysqlDb" class="com.xpogames.MysqlDb">
<property name="idDataSource" ref="idDataSource"/>
</bean>
</beans>
我的FbAuth servlet:
package com.xpogames;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
public class FbAuth extends HttpServlet {
private static final long serialVersionUID = 1L;
public FbAuth() {
super();
// TODO Auto-generated constructor stub
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
WebApplicationContext webApplicationContext = WebApplicationContextUtils.getRequiredWebApplicationContext(request.getSession().getServletContext());
MysqlDb mysqlDb = (MysqlDb)webApplicationContext.getBean("MysqlDb");
out.println(mysqlDb.testme());
out.println("Hello, world!");
out.close();
}
}
我收到以下错误:
java.lang.IllegalStateException: Context attribute is not of type WebApplicationContext
我想我没有正确地获取spring bean。
任何想法?
谢谢你!这是我的新init函数:
public void init(ServletConfig config) throws ServletException {
super.init(config);
ServletContext servletContext = this.getServletContext();
this._context = WebApplicationContextUtils.getRequiredWebApplicationContext(servletContext);
}
非常感谢! :)
答案 0 :(得分:10)
我在servlet的init()方法中使用以下内容。 init()方法在Servlets生命周期中只调用一次。
ApplicationContext context =
WebApplicationContextUtils.getRequiredWebApplicationContext(
this.getServletContext());
另外,你的web.xml中有“contextConfigLocation”吗?
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:/**/spring-config.xml
</param-value>
</context-param>
答案 1 :(得分:2)
您的类路径上可能有多个版本的Spring:检查您是否意外加载了2个不同的Spring jar。
答案 2 :(得分:1)
WebApplicationContext webApplicationContext = WebApplicationContextUtils.getWebApplicationContext(getServletContext());
webApplicationContext .getBean("Name")