怎么在在ssh的方法类访问数据库

假设你的包名是:littlehow.context
类一:
package littlehow.context;

import org.springframework.context.ApplicationContext;

/**

• SpringContext *
• @author littlehow

• @time 2016-06-20 16:20
  */
  public class SpringContext {
  private static ApplicationContext ctx = null;
  private static boolean init = false;

  /**

  • 初始化上下文
  • @param _ctx */ public static synchronized void setCtx (ApplicationContext _ctx) { if (!init) { ctx = _ctx; init = true; } }

  /**

  • 获取值
  • @param beanName
  • @return */ public static Object getBean(String beanName) { return ctx.getBean(beanName); } }

类二:
package littlehow.context;

import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;

import org.springframework.context.ApplicationContext;
import org.springframework.web.context.ContextLoaderListener;
import org.springframework.web.context.support.WebApplicationContextUtils;
/**

• SpringListener *
• @author littlehow
• @time 2016-06-20 16:24 / public class SpringListener extends ContextLoaderListener { public void contextInitialized(ServletContextEvent event) { super.contextInitialized(event); /* 获取spring上下文 */ ServletContext context = event.getServletContext(); ApplicationContext ctx = WebApplicationContextUtils.getRequiredWebApplicationContext(context); SpringContext.setCtx(ctx); } }

然后在web.xml这样配置
<listener>
littlehow.context.SpringListener

所有包名改成你自己的包名就是了，把littlehow.context改成你自己的包名

这里调用了此方法

不是有个调用dao层的方法嘛。。那就是从数据库里拿数据了..