propertiesdemo.java

java 教程相应的代码 全是自己写的内附注释 很容易看明白的

package demo.chapter.properties;

import java.io.FileReader;
import java.util.Properties;
import java.util.Scanner;

/**
 * 读取属性配置文件使用范例
 * 
 * @author Frank
 */
public class PropertiesDemo {

	public static final String FILENAME = "config.properties";
	public static final String USERNAME = "admin_username";
	public static final String PASSWORD = "admin_password";

	public static void main(String[] args) {

		Properties property = new Properties();
		try {
			property.load(new FileReader(FILENAME));

			String username = property.getProperty(USERNAME);
			String password = property.getProperty(PASSWORD);

			System.out.println("请输入用户名和密码(用户名与密码中间以\":\"号分隔)");
			Scanner scan = new Scanner(System.in);
			while (true) {
				String input = scan.nextLine();
				String[] s = input.split(":");
				try {
					if (username.equals(s[0]) && password.equals(s[1])) {
						System.out.println("用户名与密码正确，程序退出");
						break;
					} else {
						System.err.println("用户名或密码有误，请重新输入");
					}
				} catch (Exception e) {
					System.err.println("输入有误，请重新输入");
				}

			}
		} catch (Exception e) {
			System.err.println("无法读取属性配置文件");
		}

	}

}