Eclipse3.2版Europa #

• 注意查看README.jpg
• jdk1.5.0
• 运行当前快捷键ctrl+F11,运行上次F11
• 反编译class https://jdec.app/
• 换行字符数:窗口->首选项->java->代码样式->格式化程序->编辑->自动换行->最大行宽(160)
• 分辨率设置如下

打印环境变量 #

public class Main {
	public static void main(String[] args) {
		System.getProperties().list(System.out);
	}
}

MySQL数据库连接代码 #

• mysql-connector-java-5.1.49.jar

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class MySQLConnectionDemo {
	public static void main(String[] args) throws Exception {
		Class.forName("com.mysql.jdbc.Driver");
		String url = "jdbc:mysql://203.mm:3306/?useSSL=false&characterEncoding=UTF-8";
		String user = "zian";
		String pwd = "zian";

		Connection connection = DriverManager.getConnection(url, user, pwd);
		Statement statement = connection.createStatement();
		ResultSet resultSet = statement.executeQuery("select version()");
		resultSet.next();
		System.out.print(resultSet.getString(1));
	}
}

Redis连接代码 #

• jedis-2.1.0.jar

import redis.clients.jedis.Jedis;

public class RedisDemo {
    public static void main(String[] args) {
        Jedis jedis = new Jedis("202.mm", 6379);
        jedis.auth("zian");
        System.out.println("Server is running: " + jedis.ping());

        jedis.set("name", "子安");
        String value = jedis.get("name");
        System.out.println("name：" + value);
        jedis.disconnect();
    }
}

常用库 #

| 查看MANIFEST.MF文件Build-Jdk

• commons-io-2.2.jar
• jedis-2.1.0.jar
• mysql-connector-java-5.1.49.jar
• oshi-core-1.2.jar
• httpclient-4.1.3.jar+commons-logging-1.1.1.jar+httpcore-4.1.4.jar才能使用
• gson-1.4.jar