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在spring中使用log4j

• 引入log4j软件包
• 配置log4j属性
• 加载log4j配置文件
  • 默认加载
  • 手动加载
• 使用logger

本文的整体代码结构是在已经引入spring基本应用的前提下，在spring配置文件中通过@Bean注解创建一个Logger bean，然后在测试代码中使用。

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.net.URL;

import org.apache.log4j.Logger;
import org.apache.logging.log4j.core.config.ConfigurationSource;
import org.apache.logging.log4j.core.config.Configurator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;

@Configuration
@EnableAspectJAutoProxy
@ComponentScan({"com.markey.messageboard.app.impl","com.markey.messageboard.aop"})
public class SpringConfig {
//	@Bean
//	public static PropertySourcesPlaceholderConfigurer placeholderConfigurer(){
//		PropertySourcesPlaceholderConfigurer placeholderConfigurer = new PropertySourcesPlaceholderConfigurer();
//		return placeholderConfigurer;
//	}
	@Bean
	public static Logger logger(){
		String path="/com/log4j.properties";
		URL url=SpringConfig.class.getResource(path);
		ConfigurationSource source;
		try {
			source = new ConfigurationSource(new FileInputStream(new File(url.getPath())),url);
			Configurator.initialize(null, source);
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		Logger logger = Logger.getLogger(SpringConfig.class);
		return logger;
	}
}

import org.apache.log4j.Logger;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.env.Env