关于日志打包的一些用法

日志几乎是一个项目的第二最重要的东西，而繁多的日志框架、各种依赖版本冲突 ，真的是头都疼。

一般项目满足以下条件就差不多了

• 基本日志输出, 能打成可执行jar包
• 日志的持久化, 入文件

SpringBoot+Mybatis+Druid+log4j 日志打包

• 把SpringBoot自带的日志功能关闭

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter</artifactId>
    <exclusions>
        <!-- 切换log4j2日志读取 -->
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-logging</artifactId>
        </exclusion>
    </exclusions>
</dependency>

• 添加Mybatis依赖

<!-- log-file config start -->
<!-- 配置 log4j2 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>
<!-- 识别 log4j2.yml文件 -->
<dependency>
    <groupId>com.fasterxml.jackson.dataformat</groupId>
    <artifactId>jackson-dataformat-yaml</artifactId>
    <version>2.8.10</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>log4j-over-slf4j</artifactId>
</dependency>
<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.16</version>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
</dependency>
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
    <version>3.6</version>
</dependency>
<!-- log-file config end -->

• 添加log4j.xml

Appenders:
    Console:  # 输出到控制台
      name: CONSOLE # Appender命名
      target: SYSTEM_OUT
      PatternLayout:
        pattern: "%d{yyyy-MM-dd HH:mm:ss,SSS}:%4p %t (%F:%L) --- %m%n"
    RollingFile: # 输出到文件，超过256MB归档
      - name: ROLLING_FILE
        ignoreExceptions: false
        fileName: file.log
        filePattern: "${date:yyyy-MM}-%d{yyyy-MM-dd}-%i.log.gz"
        PatternLayout:
          pattern: "%d{yyyy-MM-dd HH:mm:ss,SSS}:%4p %t (%F:%L) --- %m%n"
        Policies:
          SizeBasedTriggeringPolicy:
            size: "256 MB"
        DefaultRolloverStrategy:
          max: 100
Loggers:
    Root:
      level: info
      AppenderRef:
        - ref: CONSOLE
        - ref: ROLLING_FILE
    Logger:
      - name: com.example.mybatis.dao # 对dao层开启debug模式, 可以看到SQL
        additivity: false
        level: debug
        AppenderRef:
          - ref: CONSOLE

• SpringBoot方式打可执行jar包

<build>
    <finalName>video_black_incs</finalName>
    <plugins>
        <!-- 打 数据源+日志 的可执行依赖包 -->
        <!-- 什么 shade、assembly 都是垃圾 -->
        <!-- 楼上+1 -->
        <!-- 楼上+1 -->
        <!-- 楼上+1 -->
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <!-- 工程主入口-->
                <mainClass>com.asia.hy.increment.IncrementHandle</mainClass>
            </configuration>
            <executions>
                <execution>
                    <goals>
                        <goal>repackage</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

• 数据源监控

1. 过滤器

import com.alibaba.druid.support.http.WebStatFilter;

import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;

@WebFilter(
        urlPatterns = "/",
        initParams = {
                @WebInitParam(name = "exclusions", value = "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*")
        }
)
public class DruidStatFilter extends WebStatFilter {
}

2. 监控器

import com.alibaba.druid.support.http.StatViewServlet;

import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;

@WebServlet(
        urlPatterns = {"/druid/*"},
        initParams = {
                @WebInitParam(name = "loginUsername", value = "admin"),
                @WebInitParam(name = "loginPassword", value = "test"),
                @WebInitParam(name = "resetEnable", value = "false")
        }
)
public class DruidStatViewServlet extends StatViewServlet {
}

访问(账密上面配置)

http://localhost:8080/druid/login.html