maven webapp项目创建servlet

maven webapp项目创建servlet

1、创建一个maven项目
2、把项目引入到idea中。（这些步骤可以参考我以前的博客）
3、在java文件夹下创建一个servlet，发现没有这个选项。原因是没有引入servlet的jar包。需要在pom.xml中加入如下依赖。一个是javax.servlet，还有一个是jstl

<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/jstl/jstl -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>

4、再次创建就有一个servlet选项了：



5、编写servlet，显示功能

package com.xueyoucto.xueyou;

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

/**
* Created by Administrator on 2016-09-08.
*/
@WebServlet(name = "EncodingTestServlet",urlPatterns = "/encodingTest")
public class EncodingTestServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request,response);
}

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
String s = request.getParameter("param");
System.out.println(s);
}
}

6、运行后：