Java核心代码例程之：PropertiesDemo.java

2019-11-18 15:17:06

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import java.util.*;
import java.io.*;

/**
* Demonstrates how to sort strings.
***/
public class PRopertiesDemo
{
    public static void main(String args[]) throws Exception
    {
        Properties props = new Properties();
        props.put("db.user", "jack");
        props.put("db.passWord", "opendoor");

        // getProperty will return the value if found, otherwise null
        System.out.println(props.getProperty("db.user"));

        // getProperty will return the value if found, otherwise "none"
        System.out.println(props.getProperty("db.password", "none"));

        /*
        // You can also load properties from a file
        FileInputStream fis = new FileInputStream("my.properties");
        props.load(fis);
        fis.close();
        **/
    }
}

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