先写两个servlet,之后展示web.xml配置
package app01c;
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;
/**
* 如何访问:
* http://localhost:端口号(使用tomcat没有修改过的是8080)/项目名/下面WebServlet中的urlPatterns
* 如果使用的是web.xml配置文件,那么访问路径就变为:
* http://localhost:端口号(使用tomcat没有修改过的是8080)/项目名/web.xml中该servlet对应的url-pattern
* @author Administrator
*
*/
public class SimpleServlet extends HttpServlet {
private static final long serialVersionUID = 8946L;
@Override
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter writer = response.getWriter();
writer.print("<html><head></head>" +
"<body>Simple Servlet</body></html");
}
}
package app01c;
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;
/**
* 如何访问:
* http://localhost:端口号(使用tomcat没有修改过的是8080)/项目名/下面WebServlet中的urlPatterns
* 如果使用的是web.xml配置文件,那么访问路径就变为:
* http://localhost:端口号(使用tomcat没有修改过的是8080)/项目名/web.xml中该servlet对应的url-pattern
* @author Administrator
*
*/
public class WelcomeServlet extends HttpServlet {
private static final long serialVersionUID = 27126L;
@Override
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter writer = response.getWriter();
writer.print("<html><head></head>"
+ "<body>Welcome</body></html>");
}
}
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<servlet>
<!-- name表示对应servlet的类名 -->
<servlet-name>SimpleServlet</servlet-name>
<!-- class表示完整的路径 -->
<servlet-class>app01c.SimpleServlet</servlet-class>
<!-- load-on-startup这个元素使得Servlet在启动时加载,而不是在第一次调用时加载 -->
<load-on-startup>10</load-on-startup>
</servlet>
<servlet-mapping>
<!-- 与上面的name必须相同 -->
<servlet-name>SimpleServlet</servlet-name>
<!-- 与WebServlet的urlPatterns相同,利用url访问的时候有用,还有就是form表单中的action的内容 -->
<url-pattern>/simple</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>WelcomeServlet</servlet-name>
<servlet-class>app01c.WelcomeServlet</servlet-class>
<load-on-startup>20</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>WelcomeServlet</servlet-name>
<url-pattern>/welcome</url-pattern>
</servlet-mapping>
</web-app>