Java Servlet

• 使用IDEA2017.2.3

创建web项目

1. 创建项目File->New->Project->java 选中 Web Application
2. 导入所需库File->Project Structure->Modules->Dependencies-> 点击+号 ->JARs or directories->tomcat\lib\servlet-api.jar
3. 右上角Edit Configurations添加Tomcat Server->Local 使用默认配置

创建Servlet类

javaTest.HelloWorld

public class HelloWorld extends HttpServlet{
    @Override
    public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html");
        resp.getWriter().print("hello");
    }
}

配置web.xml

在web-app标签中添加

<servlet>
    <servlet-name>HelloWorld</servlet-name>
    <servlet-class>javaTest.HelloWorld</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>HelloWorld</servlet-name>
    <url-pattern>/hello</url-pattern>
</servlet-mapping>

启动服务器

运行，等待服务器启动完成，访问127.0.0.1:8080/hello，显示hello