java 读取properties

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

public class ConfigUtils {

    private static Properties configfile = null;

    static {
        InputStream in = ConfigUtils.class.getClassLoader()
                .getResourceAsStream("config.properties");
        configfile = new Properties();
        try {
            configfile.load(in);
            in.close();
        } catch (IOException e) {
            System.out.println("No config.properties defined error");
        }finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (IOException e) {
                in = null;
            }
        }
    }

    public String getPropertiesByKey(String _key) {
        return configfile.getProperty(_key);
    }

}

调用：

//spring mvc注解
@Resource
private ConfigUtils config;
@Override
public void exportExcel() {
config.getPropertiesByKey(“key”)
}