servlet運行“/*”引起的java.lang.StackOverflowError

    <servlet>
        <servlet-name>login</servlet-name>
        <servlet-class>com.jd.login.UI.LoginUIServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>login</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>

若將servlet的url-pattern配置為“/*”時會攔截內部所有請求，使所有請求都由com.jd.login.UI.LoginUIServlet來處理，所以當項目跑起來后會出現棧溢出錯誤：java.lang.StackOverflowError

@WebServlet(name = "LoginUIServlet",value="/servlet/LoginUIServlet")
public class LoginUIServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
       //出現死循環，因為所有請求都被攔截
       request.getRequestDispatcher("/WEB-INF/pages/login.jsp").forward(request,response);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request,response);
    }
}

棧溢出異常如下：

解決：

將web.xml中的servlet的url-pattern配置為具體的路徑

    <servlet>
        <servlet-name>login</servlet-name>
        <servlet-class>com.jd.login.UI.LoginUIServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>login</servlet-name>
        <url-pattern>/servlet/LoginUIServlet</url-pattern>
    </servlet-mapping>

檢驗：

在瀏覽器中輸入localhost/servlet/LoginUIServlet，結果如下

備注：在IDEA中跑起來的web項目，在瀏覽器中訪問不要添加應用名稱。