Java+Tomcat+Servlet实现页面访问

window7下Java环境安装记录：
1、安装Tomcat
一、下载tomcat 7.0，解压，无需安装，放置到目录：D:\apache-tomcat-7.0.90。
二、配置系统环境变量，CATALINA_BASE=D:\apache-tomcat-7.0.90，CATALINA_HOME=D:\apache-tomcat-7.0.90，在Path中新增“%CATALINA_HOME%\lib;%CATALINA_HOME%\bin”的环境变量。
三、进入D:\apache-tomcat-7.0.90\bin，执行startup启动tomcat,浏览器中输入“127.0.0.1:8080”便可查看是否成功。
2、搭建Servlet，使用Servlet实现动态web
一、使用Idea建立web Application project.

二、在src目录下new 一个servlet,起名：test.servlet.study

三、重写Servlet类里的doPost和doGet方法。

package test.servlet.study;

import java.io.IOException;
import java.io.PrintWriter;

public class Servlet extends javax.servlet.http.HttpServlet {
    protected void doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException {
        PrintWriter out = response.getWriter();
        out.println("POST:Hello world!" + request.getParameter("name"));
    }

    protected void doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException {
        response.setCharacterEncoding("GBK");
        PrintWriter out = response.getWriter();
        String sss = show(request.getParameter("name"));
        out.println("GET:Hello world!" + sss);
    }

    public String show(String name) {
        return name + ",你好！！！";
    }
}

四、修改web.xml增长servlet-mapping标签，增长rul地址->/servlet/test/hello。

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    <servlet>
        <servlet-name>Servlet</servlet-name>
        <servlet-class>test.servlet.study.Servlet</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>Servlet</servlet-name>
        <url-pattern>/servlet/test/hello</url-pattern>
    </servlet-mapping>
</web-app>

五、打war包Build-->Build Artifacts,包名webAppTest1,放到D:\apache-tomcat-7.0.90\webapps目录下。
六、重启tomcat,访问http://127.0.0.1:8080/webAppTest1/servlet/test/hello?name=jien便可。

参考：
使用Servlet:http://www.javashuo.com/article/p-focgvsax-dp.html
打包：https://blog.csdn.net/walk_man_3/article/details/79404911