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step1
或者在普通的java项目中添加framework support
step2
File—->Project Structure
step3
在web目录下新建lib和classes两个目录,分别用来放依赖库文件和类文件。
step4
先找到你新建的classes文件地址,复制文件路径。然后File—->Project Structure—->modules—->paths.
把artifacts直接部署到tomcat的工作目录中,更便捷省事。
step5
选中src目录,右键新建HelloServlet
import java.io.IOException;
import java.util.Date;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class HelloServlet extends HttpServlet {
protected void doGet(HttpServletRequest request,HttpServletResponse response)
throws ServletException, IOException {
try {
response.getWriter().println("<h1>Hello Servlet!</h1>");
response.getWriter().println(new Date().toString());
} catch (Exception e) {
e.printStackTrace();
}
}
}
step6
导入jar包,有两种方式:
6.1: project structure—->modules—>dependencies.
[可选],继续添加Library
6.2: 复制servlet-api.jar到lib目录,然后右键add as library.
6.3:lib和classes目录最好还是放在WEB-INF目录下,更安全和方便。
step7
修改web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<servlet>
<servlet-name>HelloServlet</servlet-name>
<servlet-class>HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HelloServlet</servlet-name>
<url-pattern>/hello</url-pattern>
</servlet-mapping>
</web-app>