eclipse搭建servlet项目

1、创建web项目

2、勾选Generate web.xml

3、创建Class文件并实现Servlet接口

当搜索Servlet接口时，如果未发现接口则Add library→选择tomcat版本至完成。

代码如下：

package test.servlet;
import java.io.IOException;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class TestServlet implements Servlet {
    @Override
    public void destroy() {
        // TODO Auto-generated method stub
    }
    @Override
    public ServletConfig getServletConfig() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public String getServletInfo() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public void init(ServletConfig arg0) throws ServletException {
        System.out.println("servlet初始化");
    }
    @Override
    public void service(ServletRequest arg0, ServletResponse arg1) throws ServletException, IOException {
        System.out.println("service");
    }
    public TestServlet(){
        System.out.println("TestServlet");
    }
}

4、编辑web.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    id="WebApp_ID" version="3.0">
    <display-name>servlet-demo</display-name>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list>
    <!-- 配置和映射servlet -->
    <servlet>
        <!-- Servlet注册的名字 -->
        <servlet-name>TestServlet</servlet-name>
        <!-- Servlet的全类名 -->
        <servlet-class>test.servlet.TestServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <!-- 需要和某一个servlet节点的servlet-name子节点的名称一致 -->
        <servlet-name>TestServlet</servlet-name>
        <!-- 映射具体的访问路径：/代表当前web应用的根目录 -->
        <url-pattern>/TestServlet</url-pattern>
    </servlet-mapping>
</web-app>

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