生成Jar包META-INF配置

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测试mysql数据库连接：

package cn.yws.fuck;import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.Statement;public class Fuck {public static void main(String[] args) {if(args.length!=2){args=new String[]{"root","root"};System.out.println("user==null password=null");}// 驱动程序名String driver = "com.mysql.jdbc.Driver";// URL指向要访问的数据库名scutcsString url = "jdbc:mysql://127.0.0.1:3306/mysql";// MySQL配置时的用户名String user = args[0];// MySQL配置时的密码String password = args[1];try {// 加载驱动程序Class.forName(driver);// 连续数据库fConnection conn = DriverManager.getConnection(url, user, password);if (!conn.isClosed())System.out.println("Succeeded connecting to the Database!");// statement用来执行SQL语句Statement statement = conn.createStatement();// 要执行的SQL语句String sql = "select * from user";// 结果集ResultSet rs = statement.executeQuery(sql);while (rs.next()) {System.out.println(rs.getString(1)+","+rs.getString(2)+rs.getString(3)+","+rs.getString(4)+","+rs.getString(5));}rs.close();conn.close();System.out.println("ok");} catch (Exception e) {e.printStackTrace();}}}

生成Jar包META-INF配置

Manifest-Version: 1.0Main-Class: cn.yws.fuck.FuckClass-Path: lib/mysql-connector-java-5.1.6-bin.jar

/** * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements.  See the NOTICE file * distributed with this work for additional information * regarding copyright ownership.  The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License.  You may obtain a copy of the License at * *     http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package org.apache.hadoop.util;import java.util.Map.Entry;import java.util.jar.*;/** * A micro-application that prints the main class name out of a jar file. */public class PrintJarMainClass {    /**   * @param args   */  public static void main(String[] args) {    try {      JarFile jar_file = new JarFile(args[0]);      if (jar_file != null) {        Manifest manifest = jar_file.getManifest();        if (manifest != null) {          String value = manifest.getMainAttributes().getValue("Main-Class");          if (value != null) {            System.out.println("Main-Class:"+value.replaceAll("/", "."));            //return;          }        }        for (Entry<Object, Object> data : manifest.getMainAttributes().entrySet()) {        System.out.println(data.getKey()+":"+data.getValue());}      }    } catch (Throwable e) {      // ignore it    e.printStackTrace();    }    System.out.println("UNKNOWN");    System.exit(1);  }  }

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