Keine Zuordnung gefunden für HTTP-Anfrage mit URI [/ LoginApp /] in DispatcherServlet mit dem Namen 'java4s'

Question

Früher arbeitete mein Code, aber jetzt bin ich mit diesem Fehler konfrontiert Manchmal funktioniert der Code und manchmal funktioniert es nicht.

Mein Code ist

Java4sController.java

package java4s; 

import javax.validation.Valid; 
import javax.servlet.http.HttpServletRequest; 
//import javax.servlet.http.HttpServlet; 
//import javax.servlet.*; 
import javax.servlet.http.*; 
import org.springframework.stereotype.Controller; 
import org.springframework.ui.ModelMap; 
import org.springframework.validation.BindingResult; 
import org.springframework.web.bind.annotation.RequestMapping; 
import org.springframework.web.bind.annotation.RequestMethod; 
import java.sql.*; 
//import org.h2.jdbcx.JdbcConnectionPool; 


//import org.springframework.security.core.context.SecurityContextHolder; 


@Controller 
public class Java4sController {  

    HttpSession session; 
    String uname="",pass=""; 
    Statement stmt; 
    Connection conn; 

     @RequestMapping(value="displayForm.html", method=RequestMethod.GET) 
     public String helloWorld(UserDetails ud,HttpServletRequest request,HttpServletResponse response) { 
      return "loginPage";    
     } 



     @RequestMapping("/login") 
     public String loginCheck(@Valid UserDetails userDetails, BindingResult result, ModelMap model,HttpServletRequest request,HttpServletResponse response)throws Exception 
     { 
      System.out.println("In the login page"); 

      String username=userDetails.getUser(); 
      String password=userDetails.getPassword(); 

      if (result.hasErrors()) { 
       return "loginPage"; 
      } 
      try { 
      Class.forName("org.h2.Driver"); 
      conn = DriverManager. 
       getConnection("jdbc:h2:file:C:/Users/patilv/test", "sa", ""); 
      // add application code here 
if(conn!=null) { 
    System.out.println("No connection"); 
} 

      stmt=conn.createStatement(); 
String sql="Select * FROM table1 WHERE username='"+username+"' AND password='"+password+"' "; 
ResultSet rs=stmt.executeQuery(sql); 




while(rs.next()) 
{ 
    uname=rs.getString("username"); 
    pass=rs.getString("password"); 


      if (result.hasErrors()) { 
       return "loginPage"; 
      } 

      else if(username.equals(uname)&&password.equals(pass)) 
      { 
       //session.invalidate(); 
       response.setHeader("Cache-Control","no-cache"); 
       response.setHeader("Cache-Control","no-store"); 
       response.setDateHeader("Expires", 0); 
       response.setHeader("Pragma","no-cache"); 
       session = request.getSession(); // create session 

       session.setAttribute("username", username); 
       session.setAttribute("password", password); 
       //String str1=(String)session.getAttribute(username); 

       model.addAttribute("lfobj", userDetails); 
       //model.addAttribute(str1); 
       conn.close(); 

       return "success"; 
      } 



      else 
      { 
       conn.close(); 
       return "loginPage"; 
      } 
} 
     }finally{ 
      //finally block used to close resources 
      try{ 
       if(stmt!=null) 
        conn.close(); 
      }catch(SQLException se){ 
      }// do nothing 
      try{ 
       if(conn!=null) 
        conn.close(); 
      }catch(SQLException se){ 
       se.printStackTrace(); 

      }//end finally try 
     }//end try 
      return "abcd"; 
     } 

     @RequestMapping(value="logoutform", method=RequestMethod.GET) 
     public String helloWorld1(UserDetails ud,HttpServletRequest request,HttpServletResponse response) { 

      System.out.println("\nabcdef\n"); 
      response.setHeader("Cache-Control","no-cache"); 
      response.setHeader("Cache-Control","no-store"); 
      response.setDateHeader("Expires", 0); 
      response.setHeader("Pragma","no-cache"); 
      String username=ud.getUser(); 
      // String password=ud.getPassword(); 

      HttpSession session1; 
      session1=request.getSession(false); 
      System.out.println("Session :"+session1.getAttribute("username")); 
      if(session1!=null) 
      { 
       //session1.removeAttribute(username); 
       session1.invalidate(); 
       Cookie[] cookies = request.getCookies(); 
       for (Cookie cookie : cookies) { 
        cookie.setMaxAge(0); 
        cookie.setValue(null); 
        cookie.setPath("/"); 
        response.addCookie(cookie); 
       } 
       System.out.println("invalidating session"); 
       //session1.invalidate(); 
      } 

      return "logoutsuccess";    
     } 

} 

web.xml

<?xml version="1.0" encoding="UTF-8"?> 
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" id="WebApp_ID" version="2.4"> 
<servlet> 
    <servlet-name>java4s</servlet-name> 
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
    <load-on-startup>1</load-on-startup> 
</servlet> 

<servlet-mapping> 
    <servlet-name>java4s</servlet-name> 
    <url-pattern>*.jsp</url-pattern> 
</servlet-mapping> 

<welcome-file-list> 
    <welcome-file>index.jsp</welcome-file> 
</welcome-file-list> 
</web-app> 

java4s-servlet.xml

<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:p="http://www.springframework.org/schema/p" 
    xmlns:context="http://www.springframework.org/schema/context" 
    xmlns:mvc="http://www.springframework.org/schema/mvc" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
     http://www.springframework.org/schema/context 
     http://www.springframework.org/schema/context/spring-context-3.2.xsd 
     http://www.springframework.org/schema/mvc 
     http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd"> 
<context:component-scan base-package="java4s" /> 
    <mvc:annotation-driven /> 
    <!-- <mvc:resources mapping="/scripts/**" location="/WEB-INF/" /> --> 


    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
     <property name="prefix" value="/WEB-INF/page/" /> 
     <property name="suffix" value=".jsp" /> 
    </bean> 

    <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource"> 
     <property name="basename" value="props" /> 
    </bean> 

</beans> 

Meine Verzeichnisstruktur ist

Answer 1

Ihr Code enthält einige Tippfehler.

1. URL ist nicht einheitlich

• displayForm.html
• /login
• logoutForm

2.In web.xml Mapping nicht richtig ist

• <url-pattern>*.jsp</url-pattern>

So ist Lösung ein Format beibehalten oder die Zuordnung ändern.

In web.xml

<url-pattern>/</url-pattern> und jedes Format wie *.html,*.action,*.do verwenden.

hinzufügen / alle RequestMappings wie /displayForm.html,/logoutForm

und der Fehler wird keine Zuordnung für HTTP-Anforderung mit URI gefunden [/ LoginApp /]

• Grund ist, gibt es keine Anfrage Mapping für / . Schreiben Sie eine Methode, um / Anfrage zu bearbeiten, und platzieren Sie index.jsp unter WEB-INF/pages.

  @RequestMapping(value="/", method=RequestMethod.GET) public String loadApp(UserDetails ud,HttpServletRequest request,HttpServletResponse response) { return "index"; }

UPDATE:

Versuchen durch die

<context-param> 
     <param-name>contextConfigLocation</param-name> 
     <param-value>  
      /WEB-INF/java4s-servlet.xml  
     </param-value> 
    </context-param>