14.如何读取配置文件的键值对

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.Properties;

public class propertiesHandle {
    private Properties m_properties;
    private static String path = "properties.conf";
    public propertiesHandle(){

        try {
            InputStreamReader in = new InputStreamReader(new FileInputStream(path),"GBK");
            Properties pro = new Properties();
            try {
                pro.load(in);
                m_properties = pro;
                in.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    /*
     * 将文件加载到内存，修改key的value值，再保存
     */
   public void setProperties(String name,String value){
       m_properties.setProperty(name, value);
       try {
        FileOutputStream out = new FileOutputStream(path);
        m_properties.store(out, null);
        out.close();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
   }
   public String getProperties(String name){
       return m_properties.getProperty(name);
   }
   public static void main(String args[]){
       propertiesHandle pro = new propertiesHandle();
       System.out.println(pro.getProperties("host"));
   }
}

配置文件的位置

配置文件内容事例