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新建一个普通项目，填groupid,artifictid,删去src，
自己写名字
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在该项目下新建Module，选create和webapp，选择本地maven和仓库
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完善maven 结构，java和resources
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父工程pom中添加依赖
javax.servlet javax.servlet-api 4.0.1 javax.servlet.jsp jsp-api 2.2
- 子工程Java目录新建一个普通类，继承HttpServlet
package com.raylene.servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
public class HelloServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//设置网页响应类型
resp.setContentType("text/html;charset=utf-8");
//实现具体操作
PrintWriter out = resp.getWriter();
out.println("This is a new servlet page");
out.write("系统时间为："+new Date());
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
}
}
- 子工程pom中添加servlet映射
Archetype Created Web Application hello org.raylene.servlet.HelloServlet hello /hello
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配置tomcat
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启动项目
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启动成功output窗口显示，同时浏览器中会弹出index.jsp的内容，此时可以在url后输入你在设置的映射名，即可进入对应的目录
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关闭tomcat
注意：可能在最后启动tomcat时报错：
Connected to server [ Artifact servlet-01:war: Artifact is being deployed, please wait... **严重 [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.Containerbase.addChildInternal Containerbase.addChild: start:** org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/servlet_01_war]] **严重 [RMI TCP Connection(3)-127.0.0.1] org.apache.tomcat.util.modeler.baseModelMBean.invoke Exception invoking method manageApp java.lang.IllegalStateException: Containerbase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/servlet_01_war]]** Caused by: **java.lang.IllegalStateException: Containerbase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/servlet_01_war]]**
解决法案可参考：web项目启动出错
我的刚开始就属于最基本的在配置servlet映像时没有加，在web.xml的配置中以下标签（访问路径）里面的内容前面没有加"/"。解决方法时加上"/"就行。
/*
关于URL中的斜杠
