01_3_创建一个Servlet
1.创建一个Servlet
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class HelloWorldServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
//设置返回信息的内容字符集，切记位置
resp.setContentType("text/html;charset=gbk");
//处理客户端的请求
PrintWriter out = resp.getWriter();
//获取基于字符的打印流
out.println("<html><title>Hello World Servlet</title><head><body>你好hello world!!!</body></head></html>");
out.flush();
//更新缓存
out.close();
//关闭流
}
private static final long serialVersionUID = 1L;
}
2. 配置web.xml
<servlet>
<servlet-name>HelloWorldServlet</servlet-name>
<servlet-class>HelloWorldServlet</servlet-class>
<!--这里配置src全路径的servlet类路径-->
</servlet>
<servlet-mapping>
<servlet-name>HelloWorldServlet</servlet-name>
<url-pattern>/HelloWorldServlet</url-pattern>
<!--这里配置访问的时候的URL-->
</servlet-mapping>