maven 项目
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/maven-v4_0_0.xsd">
<properties>
<maven.compiler.source>7</maven.compiler.source>
<maven.compiler.target>7</maven.compiler.target>
</properties>
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>my-project2</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>my-project2</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.26</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<!-- 使用 maven-dependency-plugin 插件 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>3.2.0</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<!-- 将依赖复制到 JAR 文件的 lib 目录中 -->
<outputDirectory>${project.build.directory}/lib</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
<!-- 设置 maven-jar-plugin 生成 JAR 文件的 MANIFEST.MF 文件 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.2.0</version>
<configuration>
<archive>
<manifest>
<!-- 指定类路径为 lib 目录下的所有依赖 -->
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
<mainClass>com.example.App</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
</project>
代码
java
package com.example;
import java.sql.*;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
/**
* Hello world!
*
*/
public class App
{
public static void main( String[] args )
{
System.out.println( "Hello World!" );
try{
Class.forName("com.mysql.cj.jdbc.Driver");
System.out.println("====");
Connection connect=DriverManager.getConnection("jdbc:mysql://10.110.17.233/db","hq","123");
System.out.println("====");
Statement stmt=connect.createStatement();
ResultSet rs=stmt.executeQuery("select * from data");
while(rs.next())
System.out.println(rs.getString(1)+" "+rs.getInt(2)+" "+rs.getString(3));
connect.close();
}catch(Exception e){ System.out.println(e);}
}
}
执行命令`
shell
mvn clean
mvn compile
mvn package
java -jar /home/hq/java/my-project2/target/my-project2-1.0-SNAPSHOT.jar