Java中Properties的简单使用

package Others;

import java.util.Properties;

/***
 * Properties 资源配置文件的读写
 * 1.key与value 只能为字符串
 * 2.存储于读取

 * @author zw
 *
 */

public class Demo01 {
public static void main(String[] args){
        Properties pro =new Properties();
        pro.setProperty("driver", "oracle.jbdc.oracleDriver");
        pro.setProperty("url", "jdbc:oracle:thin:@localhost:1521:orcl");
        pro.setProperty("user", "zhangwei");
        pro.setProperty("pwd", "123456789");

        String str = pro.getProperty("pwd");
        System.out.println(str);


    }
}

package Others;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Properties;

public class Demo02 {
public static void main(String[] args) throws FileNotFoundException, IOException{
        Properties pro =new Properties();
        pro.setProperty("driver", "oracle.jbdc.oracleDriver");
        pro.setProperty("url", "jdbc:oracle:thin:@localhost:1521:orcl");
        pro.setProperty("user", "zhangwei");
        pro.setProperty("pwd", "123456789");
//绝对路径盘符
//pro.store(new FileOutputStream(new File("d:/db.properties")), "db配置");
//pro.storeToXML(new FileOutputStream(new File("d:/db.xml")), "db配置");
//相对路径盘符 存到工程里面
        pro.store(new FileOutputStream(new File("src/Others/db.properties")), "db配置");
    }
}

package Others;

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Properties;

/***
 * 使用相对路径，绝对路径读取文件
 * @author zw
 *
 */
public class Demo03 {
public static void main(String[] args) throws FileNotFoundException, IOException{
        Properties pro =new Properties();
//绝对路径
        pro.load(new FileReader("d:/db.properties"));
//相对路径
        pro.load(new FileReader("src/Others/db.properties"));
        System.out.println(pro.getProperty("user"));

    }
}

package Others;

import java.io.IOException;
import java.util.Properties;

/***
 * 使用类相对路径读取配置文件
 * bin下
 * @author zw
 *
 */

public class Demo04 {

public static void main(String[] args) throws IOException {
        Properties pro =new Properties();
        pro.load(Demo04.class.getResourceAsStream("/Others/db.properties"));
        System.out.println(pro.getProperty("user"));

    }

}