spring boot开发配置（个人笔记，非教程）

1.创建项目

使用国内源进行初始化： https://start.aliyun.com

2.配置

 		<dependency> //mybatis
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>
        
        <dependency>//mysql
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

插件
 			<plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.7</version>
                <configuration>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
            </plugin>
 

在resources目录下创建该插件的配置文件 generatorConfig.xml

在maven下载目录中找jar包

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
  PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
  "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
  <!-- 配置文件，放在resource目录下即可 -->
  <!--数据库驱动个人配置-->
 
  
  <classPathEntry
    location="C:\\Users\Administrator\\.m2\\repository\\mysql\\mysql-connector-java\\8.0.18\\mysql-connector-java-8.0.18.jar"/>
  <context id="MysqlTables" targetRuntime="MyBatis3">
    <property name="autoDelimitKeywords" value="true"/>
    <!--可以使用``包括字段名，避免字段名与sql保留字冲突报错-->
    <property name="beginningDelimiter" value="`"/>
    <property name="endingDelimiter" value="`"/>
    <!-- optional，旨在创建class时，对注释进行控制 -->
    <commentGenerator>
      <property name="suppressDate" value="true"/>
      <property name="suppressAllComments" value="true"/>
    </commentGenerator>
    <!--数据库链接地址账号密码-->
    <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
      connectionURL="jdbc:mysql://127.0.0.1:3306/boot-shop?useUnicode=true&amp;characterEncoding=UTF-8&amp;serverTimezone=Asia/Shanghai&amp;zeroDateTimeBehavior=convertToNull"
      userId="root"
      password="root">
      <property name="nullCatalogMeansCurrent" value="true"/>
    </jdbcConnection>
    <!-- 非必需，类型处理器，在数据库类型和java类型之间的转换控制-->
    <javaTypeResolver>
      <property name="forceBigDecimals" value="false"/>
    </javaTypeResolver>
    <!--生成Model类存放位置-->
    <javaModelGenerator targetPackage="com.xx.xx.model.pojo"
      targetProject="src/main/java">
      <!-- 是否允许子包，即targetPackage.schemaName.tableName -->
      <property name="enableSubPackages" value="true"/>
      <!-- 是否对类CHAR类型的列的数据进行trim操作 -->
      <property name="trimStrings" value="true"/>
      <!-- 建立的Model对象是否 不可改变  即生成的Model对象不会有 setter方法，只有构造方法 -->
      <property name="immutable" value="false"/>
    </javaModelGenerator>
    <!--生成mapper映射文件存放位置-->
    <sqlMapGenerator targetPackage="mappers" targetProject="src/main/resources">
      <property name="enableSubPackages" value="true"/>
    </sqlMapGenerator>
    <!--生成Dao类存放位置-->
    <javaClientGenerator type="XMLMAPPER" targetPackage="com.xx.xx.model.dao"
      targetProject="src/main/java">
      <property name="enableSubPackages" value="true"/>
    </javaClientGenerator>
    <!--生成对应表及类名-->
    <table schema="root" tableName="数据库中表的名字" domainObjectName="类的名字"
      enableCountByExample="false"
      enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false"
      selectByExampleQueryId="false">
    </table>
    <table  tableName="数据库中表的名字" domainObjectName="类的名字" enableCountByExample="false"
      enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false"
      selectByExampleQueryId="false">
    </table>
  </context>
</generatorConfiguration>

生成对应的类文件

配置spring boot

spring.datasource.url=jdbc:mysql://localhost:3306/数据库名?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
spring.datasource.username=root
spring.datasource.password=xxxx

#告诉mybatis mapper 文件存放路径
mybatis.mapper-locations=classpath:mappers/*.xml 

在入口文件中告知springboot map文件地址

@SpringBootApplication
@MapperScan(basePackages = "com.boot.shop.model.dao")
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}

在编写业务代码时，需要给mapper接口添加 @Repository 注解，可以解决引入时飘红问题


使用log4j2

1.禁用自带的log

		<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

2.添加依赖

		<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j2</artifactId>
        </dependency>

3.在resources目录下新建配置文件 log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="fatal">
  <Properties>
  #存放日志文件目录
    <Property name="baseDir" value="C:\\Users\\Administrator\\Desktop\\learn\\boot-shop\\src\\main\\resources\\log"/>
  </Properties>

  <Appenders>
    <Console name="Console" target="SYSTEM_OUT">
      <!--控制台只输出level及以上级别的信息（onMatch），其他的直接拒绝（onMismatch） -->
      <ThresholdFilter level="info" onMatch="ACCEPT"
        onMismatch="DENY"/>
      <PatternLayout
        pattern="[%d{MM:dd HH:mm:ss.SSS}] [%level] [%logger{36}] - %msg%n"/>
    </Console>

    <!--debug级别日志文件输出-->
    <RollingFile name="debug_appender" fileName="${baseDir}/debug.log"
      filePattern="${baseDir}/debug_%i.log.%d{yyyy-MM-dd}">
      <!-- 过滤器 -->
      <Filters>
        <!-- 限制日志级别在debug及以上在info以下 -->
        <ThresholdFilter level="debug"/>
        <ThresholdFilter level="info" onMatch="DENY" onMismatch="NEUTRAL"/>
      </Filters>
      <!-- 日志格式 -->
      <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
      <!-- 策略 -->
      <Policies>
        <!-- 每隔一天转存 -->
        <TimeBasedTriggeringPolicy interval="1" modulate="true"/>
        <!-- 文件大小 -->
        <SizeBasedTriggeringPolicy size="100 MB"/>
      </Policies>
    </RollingFile>

    <!-- info级别日志文件输出 -->
    <RollingFile name="info_appender" fileName="${baseDir}/info.log"
      filePattern="${baseDir}/info_%i.log.%d{yyyy-MM-dd}">
      <!-- 过滤器 -->
      <Filters>
        <!-- 限制日志级别在info及以上在error以下 -->
        <ThresholdFilter level="info"/>
        <ThresholdFilter level="error" onMatch="DENY" onMismatch="NEUTRAL"/>
      </Filters>
      <!-- 日志格式 -->
      <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
      <!-- 策略 -->
      <Policies>
        <!-- 每隔一天转存 -->
        <TimeBasedTriggeringPolicy interval="1" modulate="true"/>
        <!-- 文件大小 -->
        <SizeBasedTriggeringPolicy size="100 MB"/>
      </Policies>
    </RollingFile>

    <!-- error级别日志文件输出 -->
    <RollingFile name="error_appender" fileName="${baseDir}/error.log"
      filePattern="${baseDir}/error_%i.log.%d{yyyy-MM-dd}">
      <!-- 过滤器 -->
      <Filters>
        <!-- 限制日志级别在error及以上 -->
        <ThresholdFilter level="error"/>
      </Filters>
      <!-- 日志格式 -->
      <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
      <Policies>
        <!-- 每隔一天转存 -->
        <TimeBasedTriggeringPolicy interval="1" modulate="true"/>
        <!-- 文件大小 -->
        <SizeBasedTriggeringPolicy size="100 MB"/>
      </Policies>
    </RollingFile>
  </Appenders>
  <Loggers>
    <Root level="debug">
      <AppenderRef ref="Console"/>
      <AppenderRef ref="debug_appender"/>
      <AppenderRef ref="info_appender"/>
      <AppenderRef ref="error_appender"/>
    </Root>

  </Loggers>
</Configuration>

添加 aop log

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>

com.demo.test.filter.Request.java文件

package com.boot.shop.filter;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.util.Arrays;

/**
 * @author pjw
 * @date 2021\5\3 0003 19:57
 */
@Aspect
@Component
public class RequestLog {

    private final Logger log = LoggerFactory.getLogger(RequestLog.class);

    @Pointcut("execution(public * com.boot.shop.controller.*.*(..))")
    public void requestLog() {
    }

    @Before("requestLog()")
    public void doBefore(JoinPoint joinPoint){
        ServletRequestAttributes attributes = (ServletRequestAttributes)RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();
        log.info("---------------http log start----------------");
        log.info("url: " + request.getRequestURL().toString());
        log.info("method: " + request.getMethod());
        log.info("class_method: " + joinPoint.getSignature().getDeclaringTypeName() + '.' + joinPoint.getSignature().getName());
        log.info("args:" + Arrays.toString(joinPoint.getArgs()));
    }

    @AfterReturning(returning = "res",pointcut = "requestLog()")
    public void doAfter(Object res) throws JsonProcessingException {
        log.info("response:" + new ObjectMapper().writeValueAsString(res));
        log.info("---------------http log end----------------");
    }
}