mybatis、pom、logback、log4j等基本配置文件
mybatis、pom、logback等基本配置文件
一、mybatis-config.xml
DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<typeAliases>
<package name="com.it.pojo"/>
typeAliases>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql:///mybatis?useSSL=false"/>
<property name="username" value="root"/>
<property name="password" value="1234"/>
dataSource>
environment>
environments>
<mappers>
<package name="com.it.mapper"/>
mappers>
configuration>
二、pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<groupId>org.examplegroupId>
<artifactId>d2_maven_mybatisartifactId>
<version>1.0-SNAPSHOTversion>
<packaging>warpackaging>
<dependencies>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>5.1.46version>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>1.1.12version>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.13version>
<scope>testscope>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>3.5.5version>
dependency>
<dependency>
<groupId>org.slf4jgroupId>
<artifactId>slf4j-apiartifactId>
<version>1.7.20version>
dependency>
<dependency>
<groupId>ch.qos.logbackgroupId>
<artifactId>logback-classicartifactId>
<version>1.2.3version>
dependency>
<dependency>
<groupId>ch.qos.logbackgroupId>
<artifactId>logback-coreartifactId>
<version>1.2.3version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
<version>3.1.0version>
<scope>providedscope>
dependency>
<dependency>
<groupId>jstlgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
dependency>
<dependency>
<groupId>taglibsgroupId>
<artifactId>standardartifactId>
<version>1.1.2version>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.tomcat.mavengroupId>
<artifactId>tomcat7-maven-pluginartifactId>
<version>2.2version>
plugin>plugins>
build>
<build>
<resources>
<resource>
<directory>src/main/resourcesdirectory>
resource>
resources>
build>
project>
三、logback.xml
<configuration>
<appender name="Console" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>[%level] %blue(%d{HH:mm:ss.SSS}) %cyan([%thread]) %boldGreen(%logger{15}) - %msg %npattern>
encoder>
appender>
<logger name="com.itheima" level="DEBUG" additivity="false">
<appender-ref ref="Console"/>
logger>
<root level="DEBUG">
<appender-ref ref="Console"/>
root>
configuration>
四、BrandMapper.xml
DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.it.mapper.BrandMapper">
mapper>
五、BrandMapper
```xml
DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.it.mapper.BrandMapper">
<resultMap id="brandResultMap" type="brand">
<result column="brand_name" property="brandName"/>
<result column="company_name" property="companyName"/>
resultMap>
<select id="selectAll" resultMap="brandResultMap">
select *
from tb_brand;
select>
mapper>
六、JDBC数据库连接工具类 (c3p0)
①：pom.xml
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>8.0.28version>
dependency>
<dependency>
<groupId>commons-dbutilsgroupId>
<artifactId>commons-dbutilsartifactId>
<version>1.6version>
dependency>
<dependency>
<groupId>c3p0groupId>
<artifactId>c3p0artifactId>
<version>0.9.1.2version>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>1.1.12version>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.13version>
<scope>testscope>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
<version>3.1.0version>
<scope>providedscope>
dependency>
<dependency>
<groupId>org.junit.jupitergroupId>
<artifactId>junit-jupiterartifactId>
<version>RELEASEversion>
<scope>compilescope>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
dependency>
<dependency>
<groupId>taglibsgroupId>
<artifactId>standardartifactId>
<version>1.1.2version>
dependency>
②：c3p0-config.xml
<c3p0-config>
<named-config name="helloc3p0">
<property name="driverClass">com.mysql.cj.jdbc.Driverproperty>
<property name="jdbcUrl">jdbc:mysql://127.0.0.1:3306/db_bookmall?serverTimezone=GMTproperty>
<property name="user">rootproperty>
<property name="password">rootproperty>
<property name="minPoolSize" value="5"/>
<property name="maxPoolSize" value="500"/>
<property name="initialPoolSize" value="10"/>
<property name="maxIdleTime" value="60"/>
<property name="acquireIncrement" value="5"/>
<property name="maxStatements" value="0"/>
<property name="idleConnectionTestPeriod" value="60"/>
<property name="acquireRetryAttempts" value="30"/>
<property name="breakAfterAcquireFailure" value="false"/>
<property name="testConnectionOnCheckout" value="false"/>
named-config>
c3p0-config>
③：jdbc.properties
driverClassName=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://127.0.0.1:3306/db_jsp?serverTimezone=GMT
user=root
password=root
④：JDBCUtils
package com.example.d6_bookmall.util;
import com.mchange.v2.c3p0.ComboPooledDataSource;
import javax.sql.DataSource;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Properties;
public class JDBCUtils {
private static DataSource ds = new ComboPooledDataSource("helloc3p0");
public static Connection getConnectionFroC3p0() throws SQLException {
DataSource ds = new ComboPooledDataSource("helloc3p0");
return ds.getConnection();
}
public static Connection getConnection() {
try {
Properties pros = new Properties();
pros.load(JDBCUtils.class.getClassLoader().getResourceAsStream("jdbc.properties"));
String driverClassName = pros.getProperty("driverClassName");
String url = pros.getProperty("url");
String user = pros.getProperty("user");
String password = pros.getProperty("password");
// ①：加载驱动
// 反射的作用是保证Driver被加载
Class.forName(driverClassName);
// ②：获取连接
return DriverManager.getConnection(url, user, password);
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException throwables) {
throwables.printStackTrace();
}
return null;
}
// 关闭连接工具类
public static void close(Connection connection, PreparedStatement ps){
if (ps != null){
try {
ps.close();
} catch (SQLException throwables) {
throwables.printStackTrace();
}
}
if (connection != null){
try {
connection.close();
} catch (SQLException throwables) {
throwables.printStackTrace();
}
}
}
}
七、JDBC数据库连接工具类 (Druid)
①：pom.xml
-
druid
-
apache commons dbutil
-
导入依赖坐标： mysql驱动、druid、apache commons dbutil
<dependencies>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
<version>3.1.0version>
<scope>providedscope>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>8.0.28version>
dependency>
<dependency>
<groupId>commons-dbutilsgroupId>
<artifactId>commons-dbutilsartifactId>
<version>1.6version>
dependency>
<dependency>
<groupId>c3p0groupId>
<artifactId>c3p0artifactId>
<version>0.9.1.2version>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>1.1.12version>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.13version>
<scope>testscope>
dependency>
<dependency>
<groupId>org.junit.jupitergroupId>
<artifactId>junit-jupiterartifactId>
<version>RELEASEversion>
<scope>compilescope>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
dependency>
<dependency>
<groupId>taglibsgroupId>
<artifactId>standardartifactId>
<version>1.1.2version>
dependency>
<dependency>
<groupId>com.google.code.gsongroupId>
<artifactId>gsonartifactId>
<version>2.8.5version>
dependency>
dependencies>
②：druid.properties
- 在resources包中创建druid.properties配置文件，并完成参数的配置：
driverClassName=com.mysql.cj.jdbc.Driver
#URL连接数据库的URL，其中travel（以下面例子来说）为连接的数据库，后面的参数可不改但不删
url=jdbc:mysql://localhost:3306/db_mtl?serverTimezone=GMT&useSSL=false&allowPublicKeyRetrieval=true
characterEncoding=utf-8
#安装mysql时候设置的用户与密码
username=root
password=root
#初始化物理连接的个数
initialSize=5
#最大连接池数量
maxActive=10
#获取连接时最大等待时间
maxWait=3000
#用来检测连接是否有效的sql
validationQuery=SELECT 1
#保证安全性！
testWhileIdle=true
③：DruidUtils
- 在utils包中创建Druid的工具类
package com.example.d9_mtl.utils;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.pool.DruidDataSourceFactory;
import javax.sql.DataSource;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;
public class DruidUtils {
// 定义Druid数据库连接池对象
private static DruidDataSource druidDataSource;
/**
* 初始化数据库连接池
*/
static {
InputStream inputStream = DruidUtils.class.getResourceAsStream("druid.properties");
Properties pros = new Properties();
try {
pros.load(inputStream);
druidDataSource = (DruidDataSource) DruidDataSourceFactory.createDataSource(pros);
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 返回 DataSource 数据库连接池对象
* @return
*/
public static DataSource getDataSource(){
return druidDataSource;
}
/**
* 从连接池中获取获取数据库连接
* @return
*/
public static Connection getConnection(){
Connection connection = null;
try {
connection = druidDataSource.getConnection();
} catch (SQLException throwables) {
throwables.printStackTrace();
}
return connection;
}
}
④：MyBatisUtil（SqlSession工具类）
public class MyBatisUtil {
private static SqlSessionFactory factory;
private static ThreadLocal<SqlSession> local = new ThreadLocal<SqlSession>();
static {
try {
InputStream is = Resources.getResourceAsStream("mybatis-config.xml");
SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
factory = builder.build(is);
} catch (IOException e) {
e.printStackTrace();
}
}
public static SqlSessionFactory getSqlSessionFactory(){
return factory;
}
public static SqlSession getSession(boolean isAutoCommit) {
SqlSession sqlSession = local.get();
if (sqlSession == null){
sqlSession = factory.openSession(isAutoCommit);
local.set(sqlSession);
}
return sqlSession;
}
public static SqlSession getSession(){
return getSession(false);
}
public static <T>T getMapper(Class<T> clazz) {
SqlSession session = getSession(true);
return session.getMapper(clazz);
}
}
 |
八、log4j配置文件模版
1.坐标
<dependency>
<groupId>log4jgroupId>
<artifactId>log4jartifactId>
<version>1.2.17version>
dependency>
- 新建log4j.properties文件
注意：该文件必须存放在main/java/resources目录下，放在其他目录下是无效的。
①： log4j.properties
方案一
# Global logging configuration
# 设置日志输出级别以及输出目的地，可以设置多个输出目的地，开发环境下，日志级别要设置成DEBUG或者ERROR
# 前面写日志级别，逗号后面写输出目的地：我自己下面设置的目的地相对应，以逗号分开
# log4j.rootLogger = [level],appenderName1,appenderName2,…
log4j.rootLogger=DEBUG,CONSOLE,LOGFILE
#### 控制台输出 ####
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
# 输出到控制台
log4j.appender.CONSOLE.Target = System.out
# 指定控制台输出日志级别
log4j.appender.CONSOLE.Threshold = DEBUG
# 默认值是 true, 表示是否立即输出
log4j.appender.CONSOLE.ImmediateFlush = true
# 设置编码方式
log4j.appender.CONSOLE.Encoding = UTF-8
# 日志输出布局
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
# 如果日志输出布局为PatternLayout 自定义级别，需要使用ConversionPattern指定输出格式
log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %5p (%c:%L) - %m%n
#### 输出错误信息到文件 ####
log4j.appender.LOGFILE=org.apache.log4j.FileAppender
# 指定输出文件路径
#log4j.appender.LOGFILE.File =F://Intellij idea/logs/error.log
log4j.appender.LOGFILE.File =./logs/error.log
#日志输出到文件，默认为true
log4j.appender.LOGFILE.Append = true
# 指定输出日志级别
log4j.appender.LOGFILE.Threshold = ERROR
# 是否立即输出，默认值是 true,
log4j.appender.LOGFILE.ImmediateFlush = true
# 设置编码方式
log4j.appender.LOGFILE.Encoding = UTF-8
# 日志输出布局
log4j.appender.LOGFILE.layout = org.apache.log4j.PatternLayout
# 如果日志输出布局为PatternLayout 自定义级别，需要使用ConversionPattern指定输出格式
log4j.appender.LOGFILE.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n
方案二
{.brush:xml;toolbar: .true; .auto-links: .false;}
log4j.rootLogger=DEBUG, INFO, ERROR
# 输出控制台
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.Threshold=INFO
log4j.appender.CONSOLE.Target=System.out
log4j.appender.CONSOLE.Encoding=UTF-8
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=[%p]%d{yyyy-MM-dd HH:mm:ss} %l - %m%n
### 输出INFO到日志文件 ###
log4j.appender.INFO = org.apache.log4j.DailyRollingFileAppender
log4j.appender.INFO.File = /data/log/messagePush/messagePush_info.log
#log4j.appender.INFO.File = D:/work/projects/message/trunk/baoxian-message-push/log/messagePush_info.log
log4j.appender.INFO.Append = true
log4j.appender.INFO.Threshold = INFO
log4j.appender.INFO.Encoding=UTF-8
log4j.appender.INFO.layout = org.apache.log4j.PatternLayout
log4j.appender.INFO.layout.ConversionPattern = [%p] %d{yyyy-MM-dd HH:mm:ss} %l - %m%n
### 输出ERROR到日志文件 ###
log4j.appender.ERROR = org.apache.log4j.DailyRollingFileAppender
log4j.appender.ERROR.File = /data/log/messagePush/messagePush_error.log
#log4j.appender.ERROR.File = D:/work/projects/message/trunk/baoxian-message-push/log/messagePush_error.log
log4j.appender.ERROR.Append = true
log4j.appender.ERROR.Threshold = ERROR
log4j.appender.ERROR.Encoding=UTF-8
log4j.appender.ERROR.layout = org.apache.log4j.PatternLayout
log4j.appender.ERROR.layout.ConversionPattern = [%p] %d{yyyy-MM-dd HH:mm:ss} %l - %m%n
②： log4j.xml
{.brush:xml;toolbar: .true; .auto-links: .false;}
DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="debug-out" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="/data/log/openfire/debug.log" />
<param name="MaxFileSize" value="1024KB"/>
<param name="MaxBackupIndex" value="5"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{yyyy.MM.dd HH:mm:ss} %c - %m%n" />
layout>
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="LevelMax" value="debug" />
<param name="AcceptOnMatch" value="true" />
filter>
appender>
<appender name="info-out" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="/data/log/openfire/info.log" />
<param name="MaxFileSize" value="1024KB"/>
<param name="MaxBackupIndex" value="5"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{yyyy.MM.dd HH:mm:ss} %c - %m%n" />
layout>
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="LevelMax" value="info" />
<param name="LevelMin" value="info" />
<param name="AcceptOnMatch" value="true" />
filter>
appender>
<appender name="warn-out" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="/data/log/openfire/warn.log" />
<param name="MaxFileSize" value="1024KB"/>
<param name="MaxBackupIndex" value="5"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{yyyy.MM.dd HH:mm:ss} %c - %m%n" />
layout>
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="LevelMax" value="warn" />
<param name="LevelMin" value="warn" />
<param name="AcceptOnMatch" value="true" />
filter>
appender>
<appender name="error-out" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="/data/log/openfire/error.log" />
<param name="MaxFileSize" value="1024KB"/>
<param name="MaxBackupIndex" value="5"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d{yyyy.MM.dd HH:mm:ss} %c - %m%n" />
layout>
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="LevelMin" value="error" />
<param name="AcceptOnMatch" value="true" />
filter>
appender>
<logger name="org.eclipse.jetty">
<level value="warn" />
logger>
<root>
<level value="info" />
<appender-ref ref="debug-out" />
<appender-ref ref="info-out" />
<appender-ref ref="warn-out" />
<appender-ref ref="error-out" />
root>
log4j:configuration>