创建一个servlet，实现init，doGet，doPost,destory方法，并部署运行 ，编写jsp页面，并查看生成的 java和class 文件

创建servlet：

实现init，doGet，doPost,destory方法：
主要代码：public class FirstServlet extends HttpServlet{

/**
 * 
 */
private static final long serialVersionUID = 1L;

@Override
public void init() throws ServletException{
    System.out.println("init调用");
}

public void destory(){
    System.out.println("destory方法调用");
}

@Override
public void service(HttpServletRequest request ,HttpServletResponse response) throws IOException{
    System.out.println("service方法被调用");
    System.out.println(request.getParameter("msg"));
    System.out.println(request.getMethod());
    String ip = request.getRemoteAddr();


    StringBuffer strb = new StringBuffer();
    strb.append(ip+"说的：");
    //返回数据给客户端html
    PrintWriter writer = response.getWriter();
    writer.println("");
    writer.println("");
    writer.println("
");
    writer.println("");
    writer.println("");
    writer.println("");
    writer.println("
");
    writer.println("");
    writer.println("");

    //doGet和doPost方法，是通过Service方法跳转过去的。
}

public void doGet(HttpServletRequest request ,HttpServletResponse response){
    System.out.println("doget方法被调用");
}

public void doPost(HttpServletRequest request ,HttpServletResponse response){
    System.out.println("doPost方法被调用");
}

}
Web.xml代码：

sendMsg
com.sfz.servlet.FirstServlet


sendMsg
/send

!](https://img-blog.csdnimg.cn/20200623161411678.png)
编写jsp页面，并查看生成的 java和class 文件：