Question

请教在Spring MVC中，如何实现启动时从数据库读取信息

Answer 1

//给个例子你看下

package com.bing.personalweb.filter;

import java.io.IOException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.apache.log4j.Logger;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.bing.personalweb.business.errormsg.service.ErrorMsgService;
import com.bing.personalweb.business.user.service.UserService;
import com.bing.personalweb.testpackage.Consumer;
import com.bing.personalweb.testpackage.QueueController;

public class startFilter implements Filter{
private final static Logger logger = Logger.getLogger(startFilter.class);

public void init(FilterConfig fc) throws ServletException {

  new Thread(new Runnable() {
   @Override
   public void run() {
    //加载错误信息
    logger.info("开始加载 ErrorMsg--------------------");
    loadErrorMsg();
    logger.info("加载 ErrorMsg 完成--------------------");
   }
}).start();
}

public void destroy() {
}

public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {
}

@SuppressWarnings("resource")
public void loadErrorMsg(){
ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:spring-mybatis.xml");
ErrorMsgService	errorMsgService = (ErrorMsgService) ac.getBean("errorMsgService");
errorMsgService.loadErrorMsgMap();
}

}

web.xml中：
<filter>
<filter-name>startFilter</filter-name>
<filter-class>com.bing.personalweb.filter.startFilter</filter-class>
</filter>