spring的懒加载
在spring的IOC容器中,可以通过设置<beans default-lazy-init="XXX"></beans>来设置是否为懒加载模式,懒加载的意思就是说是否在spring容器加载的时候将bean加载到容器中。在没有设置的情况下,默认是false的,就是说不使用懒加载模式。
当设置为false(或者没有设置的时候)tomcat启动的时候出现的是:
Initializing Spring root WebApplicationContext log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. 测试spring的lazy属性 2015-10-13 19:06:04 org.apache.coyote.http11.Http11Protocol start 信息: Starting Coyote HTTP/1.1 on http-8080 2015-10-13 19:06:04 org.apache.jk.common.ChannelSocket init 信息: JK: ajp13 listening on /0.0.0.0:8009 2015-10-13 19:06:04 org.apache.jk.server.JkMain start 信息: Jk running ID=0 time=0/17 config=null 2015-10-13 19:06:04 org.apache.catalina.startup.Catalina start 信息: Server startup in 3546 ms
当设置true的时候,启动tomcat:
Initializing Spring root WebApplicationContext log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. 2015-10-13 19:15:44 org.apache.coyote.http11.Http11Protocol start 信息: Starting Coyote HTTP/1.1 on http-8080 2015-10-13 19:15:44 org.apache.jk.common.ChannelSocket init 信息: JK: ajp13 listening on /0.0.0.0:8009 2015-10-13 19:15:44 org.apache.jk.server.JkMain start 信息: Jk running ID=0 time=0/51 config=null 2015-10-13 19:15:44 org.apache.catalina.startup.Catalina start 信息: Server startup in 3912 ms
这个是测试bean
package com.yonyou.sys.utils;
//测试bean 将spring容器中设置bean的配置文件 public class TestBeanLazy { public TestBeanLazy(){ System.out.println("测试spring的lazy属性"); } }