servlet读取配置文件常用方式

package com.zuikc.servlet.demo;

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

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class ServletDemo1 extends HttpServlet {
    private static final long serialVersionUID = 1L;
    
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    
        InputStream in = getServletContext().getResourceAsStream("/WEB-INF/classes/config.properties");
        Properties prop=new Properties();
        prop.load(in);
        String name = prop.getProperty("name");
        System.out.println("name="+name);
    }    
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

}

 

package com.zuikc.servlet.demo;

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

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class ServletDemo1 extends HttpServlet {
    private static final long serialVersionUID = 1L;
    
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("config.properties");
        Properties prop=new Properties();
        prop.load(in);
        String name = prop.getProperty("name");
        System.out.println("name="+name);
    } 
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }
}

package com.zuikc.servlet.demo;

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

import javax.annotation.Resource;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class ServletDemo1 extends HttpServlet {
    private static final long serialVersionUID = 1L;
    
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    
        InputStream in = getServletContext().getResourceAsStream("config.properties");
        Properties prop=new Properties();
        prop.load(in);
        String name = prop.getProperty("name");
        System.out.println("name="+name);
    }    
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }
}

package com.zuikc.servlet.demo;

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

import javax.annotation.Resource;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class ServletDemo1 extends HttpServlet {
    private static final long serialVersionUID = 1L;
    
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("../../config.properties");
        Properties prop=new Properties();
        prop.load(in);
        String name = prop.getProperty("name");
        System.out.println("name="+name);
    }  
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }
}