logback运行时动态创建日志文件
package com.example.demo.config;
import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.core.ConsoleAppender;
import ch.qos.logback.core.rolling.RollingFileAppender;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import java.util.concurrent.ConcurrentHashMap;
@Component
public class LoggerBuilder {
private ConcurrentHashMap<String, Logger> container = new ConcurrentHashMap<>();
public Logger getLogger(String name,Class<?> clazz) {
Logger logger = container.get(name);
if (logger != null) {
return logger;
}
synchronized (LoggerBuilder.class) {
logger = container.get(name);
if (logger != null) {
return logger;
}
logger = build(name,clazz);
container.put(name, logger);
}
return logger;
}
private Logger build(String name,Class<?> clazz) {
RollingFileAppender errorAppender = new AppenderFactory().createRollingFileAppender(name, Level.ERROR);
RollingFileAppender infoAppender = new AppenderFactory().createRollingFileAppender(name, Level.INFO);
ConsoleAppender consoleAppender = new AppenderFactory().createConsoleAppender();
LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
Logger logger = context.getLogger(clazz + " [" + name + "]");
//设置不向上级打印信息
logger.setAdditive(false);
logger.addAppender(errorAppender);
logger.addAppender(infoAppender);
logger.addAppender(consoleAppender);
return logger;
}
}
package com.example.demo.config;
import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.classic.encoder.PatternLayoutEncoder;
import ch.qos.logback.classic.filter.LevelFilter;
import ch.qos.logback.core.ConsoleAppender;
import ch.qos.logback.core.FileAppender;
import ch.qos.logback.core.rolling.RollingFileAppender;
import ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy;
import ch.qos.logback.core.util.FileSize;
import ch.qos.logback.core.util.OptionHelper;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import static ch.qos.logback.core.spi.FilterReply.ACCEPT;
import static ch.qos.logback.core.spi.FilterReply.DENY;
public class AppenderFactory {
public RollingFileAppender createRollingFileAppender(String name, Level level) {
LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
RollingFileAppender appender = new RollingFileAppender();
//这里设置级别过滤器
appender.addFilter(createLevelFilter(level));
//设置上下文，每个logger都关联到logger上下文，默认上下文名称为default。
// 但可以使用<contextName>设置成其他名字，用于区分不同应用程序的记录。一旦设置，不能修改。
appender.setContext(context);
//appender的name属性
appender.setName("file-" + level.levelStr.toLowerCase());
//设置文件名
appender.setFile(OptionHelper.substVars("${LOG_HOME}/" + name + "/" + level.levelStr.toLowerCase() + ".log", context));
appender.setAppend(true);
appender.setPrudent(false);
//加入下面两个节点
appender.setRollingPolicy(createSizeAndTimeBasedRollingPolicy(name,level,context,appender));
appender.setEncoder(createEncoder(context));
appender.start();
return appender;
}
public ConsoleAppender createConsoleAppender(){
LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
ConsoleAppender appender = new ConsoleAppender();
appender.setContext(context);
appender.setName("file-console");
appender.addFilter(createLevelFilter(Level.DEBUG));
appender.setEncoder(createEncoder(context));
appender.start();
return appender;
}
private SizeAndTimeBasedRollingPolicy createSizeAndTimeBasedRollingPolicy(String name, Level level, LoggerContext context, FileAppender appender) {
//设置文件创建时间及大小的类
SizeAndTimeBasedRollingPolicy policy = new SizeAndTimeBasedRollingPolicy();
//文件名格式
String fp = OptionHelper.substVars("${LOG_HOME}/" + name + "/backup/" + level.levelStr.toLowerCase() + "-%d{yyyy-MM-dd}.log.%i", context);
//最大日志文件大小
policy.setMaxFileSize(FileSize.valueOf("5MB"));
//设置文件名模式
policy.setFileNamePattern(fp);
//设置最大历史记录为30条
policy.setMaxHistory(30);
//总大小限制
policy.setTotalSizeCap(FileSize.valueOf("32GB"));
//设置父节点是appender
policy.setParent(appender);
//设置上下文，每个logger都关联到logger上下文，默认上下文名称为default。
// 但可以使用<contextName>设置成其他名字，用于区分不同应用程序的记录。一旦设置，不能修改。
policy.setContext(context);
policy.start();
return policy;
}
private PatternLayoutEncoder createEncoder(LoggerContext context) {
PatternLayoutEncoder encoder = new PatternLayoutEncoder();
//设置上下文，每个logger都关联到logger上下文，默认上下文名称为default。
// 但可以使用<contextName>设置成其他名字，用于区分不同应用程序的记录。一旦设置，不能修改。
encoder.setContext(context);
//设置格式
encoder.setPattern("%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} %msg%n");
encoder.start();
return encoder;
}
private LevelFilter createLevelFilter(Level level) {
LevelFilter levelFilter = new LevelFilter();
levelFilter.setLevel(level);
levelFilter.setOnMatch(ACCEPT);
levelFilter.setOnMismatch(DENY);
levelFilter.start();
return levelFilter;
}
}
${LOG_HOME} 是 logback-spring.xml中的变量 ，如下
<?xml version="1.0" encoding="UTF-8"?> <configuration> <include resource="org/springframework/boot/logging/logback/base.xml"/> <!--spring.application.name 是 application.yml 中设置--> <springProperty scope="context" name="app_name" source="spring.application.name"/> <property scope="context" name="LOG_HOME" value="logs/${app_name}"/> </configuration>
测试代码如下，使用了swagger
@RestController
@RequestMapping("/test")
@Api(tags = "Test", description = "测试接口")
public class controller {
@Autowired
private LoggerBuilder loggerBuilder;
@ApiOperation("测试")
@PostMapping("/test")
public ResultVO test(String name) {
Logger logger = loggerBuilder.getLogger(name,controller.class);
logger.info("测试...我系{}",name);
return ResultVO.success();
}
}
以上代码运行在 springboot(2.2.2.RELEASE) + logback、springboot(1.5.8.RELEASE) + logback 均有效
