properties文件读取

package properties;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Properties;

public class PropertiesUtils {
    private static String configName;
    private static Properties properties;
    private static InputStream in;

    public PropertiesUtils(String config) throws IOException {
        configName = config;
    }

    private void init() throws IOException {
        try {
            properties = new Properties();
            in = new FileInputStream(configName);
            properties.load(new InputStreamReader(in, "UTF-8"));
        } catch (FileNotFoundException e) {
            System.out.println("初始化properties文件读取对象失败");
        }
    }

    public static void main(String[] args) throws IOException {
        PropertiesUtils p = new PropertiesUtils("resources/user.properties");
        p.init();
        System.out.println(properties.getProperty("username"));
    }
}