mirror of https://github.com/dunwu/db-tutorial.git
🔖 java 操作 mysql 实例
Zhang Peng
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<?xml version="1.0"?>
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<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
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xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
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<modelVersion>4.0.0</modelVersion>
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<!-- [Part 1] BASIC SETTINGS BEGIN -->
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<!-- MAVEN COORDINATE BEGIN -->
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<artifactId>javadb-mysql</artifactId>
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<packaging>jar</packaging>
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<!-- MAVEN COORDINATE END -->
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<!-- RELATIONSHIP SETTINGS BEGIN -->
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<parent>
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<groupId>io.github.dunwu</groupId>
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<artifactId>javadb</artifactId>
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<version>1.0.0</version>
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</parent>
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<dependencies>
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<!-- db begin -->
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<dependency>
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<groupId>mysql</groupId>
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<artifactId>mysql-connector-java</artifactId>
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<version>5.1.45</version>
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</dependency>
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<dependency>
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-pool2</artifactId>
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<version>2.5.0</version>
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</dependency>
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<!-- db end -->
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<!-- log start -->
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<dependency>
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<groupId>ch.qos.logback</groupId>
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<artifactId>logback-classic</artifactId>
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</dependency>
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<!-- log end -->
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-context-support</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-test</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<!-- RELATIONSHIP SETTINGS END -->
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<!-- [Part 1] BASIC SETTINGS END -->
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<!-- [Part 2] BUILD SETTINGS BEGIN -->
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<build>
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<finalName>${project.artifactId}</finalName>
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<resources>
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<resource>
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<filtering>true</filtering>
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<directory>src/main/resources</directory>
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<includes>
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<include>logback.xml</include>
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</includes>
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<!--<targetPath>/abc</targetPath>-->
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</resource>
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</resources>
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</build>
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<!-- [Part 2] BUILD SETTINGS END -->
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<!-- [Part 3] PROJECT INFO BEGIN -->
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<name>${project.artifactId}</name>
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<description>Java 工具使用示例</description>
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<!-- [Part 3] PROJECT INFO END -->
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</project>
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package io.github.dunwu.javadb;
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import java.sql.Connection;
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import java.sql.Date;
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import java.sql.DriverManager;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.sql.Statement;
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import org.junit.AfterClass;
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import org.junit.BeforeClass;
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import org.junit.Test;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* Mysql 测试例
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*
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* @author Zhang Peng
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* @see https://dev.mysql.com/doc/connector-j/5.1/en/
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*/
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public class MysqlDemoTest {
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private static Logger logger = LoggerFactory.getLogger(MysqlDemoTest.class);
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private static final String DB_HOST = "localhost";
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private static final String DB_PORT = "3306";
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private static final String DB_SCHEMA = "sakila";
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private static final String DB_USER = "root";
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private static final String DB_PASSWORD = "root";
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private static Statement statement;
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private static Connection connection;
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@BeforeClass
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public static void beforeClass() {
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try {
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final String DB_URL = String.format("jdbc:mysql://%s:%s/%s", DB_HOST, DB_PORT, DB_SCHEMA);
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connection = DriverManager.getConnection(DB_URL, DB_USER, DB_PASSWORD);
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// connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/sakila?" + "user=root&password=root");
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statement = connection.createStatement();
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} catch (SQLException e) {
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e.printStackTrace();
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}
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}
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@AfterClass
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public static void afterClass() {
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try {
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if (connection != null) {
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connection.close();
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}
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} catch (SQLException e) {
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e.printStackTrace();
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}
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}
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@Test
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public void testString() {
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final String sql = "select * from actor limit 10";
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try {
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ResultSet rs = statement.executeQuery(sql);
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// 展开结果集数据库
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while (rs.next()) {
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// 通过字段检索
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int id = rs.getInt("actor_id");
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String firstName = rs.getString("first_name");
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String lastName = rs.getString("last_name");
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Date lastUpdate = rs.getDate("last_update");
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// 输出数据
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logger.debug("actor_id: {}, first_name: {}, last_name: {}, last_update: {}", id, firstName, lastName,
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lastUpdate.toLocalDate());
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}
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} catch (SQLException e) {
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e.printStackTrace();
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}
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}
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}
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@ -0,0 +1,45 @@
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<?xml version="1.0" encoding="UTF-8" ?>
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<!-- logback中一共有5种有效级别，分别是TRACE、DEBUG、INFO、WARN、ERROR，优先级依次从低到高 -->
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<configuration scan="true" scanPeriod="60 seconds" debug="false">
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<property name="FILE_NAME" value="javadb"/>
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<!-- 将记录日志打印到控制台 -->
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<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
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<encoder>
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<pattern>%d{HH:mm:ss.SSS} [%thread] [%-5p] %c{36}.%M - %m%n</pattern>
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</encoder>
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</appender>
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<!-- RollingFileAppender begin -->
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<appender name="ALL" class="ch.qos.logback.core.rolling.RollingFileAppender">
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<!-- 根据时间来制定滚动策略 -->
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<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
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<fileNamePattern>${user.dir}/logs/${FILE_NAME}-all.%d{yyyy-MM-dd}.log</fileNamePattern>
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<maxHistory>30</maxHistory>
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</rollingPolicy>
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<!-- 根据文件大小来制定滚动策略 -->
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<triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
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<maxFileSize>30MB</maxFileSize>
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</triggeringPolicy>
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<encoder>
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<pattern>%d{HH:mm:ss.SSS} [%thread] [%-5p] %c{36}.%M - %m%n</pattern>
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</encoder>
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</appender>
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<!-- RollingFileAppender end -->
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<!-- logger begin -->
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<!-- 本项目的日志记录，分级打印 -->
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<logger name="io.github.dunwu" level="TRACE">
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<appender-ref ref="ALL"/>
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</logger>
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<root level="TRACE">
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<appender-ref ref="STDOUT"/>
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</root>
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<!-- logger end -->
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</configuration>
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@ -16,6 +16,7 @@
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<!-- RELATIONSHIP SETTINGS BEGIN -->
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<modules>
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<module>redis</module>
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<module>mysql</module>
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</modules>
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<!-- RELATIONSHIP SETTINGS END -->
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