5月10日 Java Web核心 练习

• • • Servlet 设置配置信息并获取

web.xml文件

    
        type
        编程类
    
    
        tName
        Java Web核心
    


    
        MyServlet_01
        com.qiku.web.MyServlet01
    

    
        MyServlet_01
        /myservlet
    

index.html

    
    
    
    


    

        
Servlet配置查看
        
    

    

        
ContextServlet配置查看
        
    

Servlet02.java文件

package com.qiku.web;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Enumeration;

@WebServlet(name = "servlet02",urlPatterns = "/ser02",
            initParams = {
                @WebInitParam(name = "username02",value = "123123"),
                @WebInitParam(name = "password",value = "456456")
            }
        )
public class Servlet02 extends HttpServlet {

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("别名：" + getServletName());
        System.out.println("配置：" + getServletConfig());
        System.out.println("===========================");
        System.out.println("属性配置信息：");
        Enumeration initParameterNames = getInitParameterNames();
        while(initParameterNames.hasMoreElements()){
            String s = initParameterNames.nextElement();
            System.out.println("属性:" + s + ",t属性值：" + getInitParameter(s));
        }
    }
}

配置后：

结果：

ContextServlet.java文件

package com.qiku.web;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Enumeration;

@WebServlet(name = "servlet02",urlPatterns = "/ser02",
            initParams = {
                @WebInitParam(name = "username02",value = "123123"),
                @WebInitParam(name = "password",value = "456456")
            }
        )
public class Servlet02 extends HttpServlet {

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("别名：" + getServletName());
        System.out.println("配置：" + getServletConfig());
        System.out.println("===========================");
        System.out.println("属性配置信息：");
        Enumeration initParameterNames = getInitParameterNames();
        while(initParameterNames.hasMoreElements()){
            String s = initParameterNames.nextElement();
            System.out.println("属性:" + s + ",t属性值：" + getInitParameter(s));
        }
    }
}

配置后：

结果：