The project structure


An error

 
Org. Springframework. Beans. Factory. NoSuchBeanDefinitionException: 
No qualifying bean of type 'com. Service. UserService' available: expected at further 1 bean which qualifies as autowire candidate. 
Dependency annotations: {@ javax.mail. The annotation. The Resource (shareable=true, lookup=, name=, the description=, authenticationType=CONTAINER, type=class. Java lang. Object, mappedName=)} 

The applicationcontext.xml

UserController

 
Package com. The controller; 

The import com. Service. UserService; 
The import org. Springframework. Stereotype. The Controller; 
The import org. Springframework. UI. Model; 
The import org. Springframework. Web. Bind. The annotation. RequestMapping; 
The import org. Springframework. Web. Bind. The annotation. RequestMethod; 

The import javax.mail. The annotation. The Resource; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
The import javax.mail. Servlet. HTTP. HttpSession; 
import java.io.IOException; 

@ Controller 
Public class UserController {

@ the Resource 
Private UserService UserService; 

@ RequestMapping (value="https://bbs.csdn.net/topics/Login", produces="text/HTML. Charset=utf-8 ", method=RequestMethod. POST) 
Public String Login (Model Model, String name, String PWD) {
Int ans=userService. UserLogin (name, PWD). 
//int ans=0; 
String TMP=null; 
The switch (ans) {
Case 0: 
TMP="please enter the user name and password". 
break; 
Case 1: 
TMP="user name does not exist"; 
break; 
Case 2: 
TMP="password error"; 
break; 
Case 3: 
TMP="login successful + name"; 
Model. The addAttribute (" name ", name); 
break; 
} 
Model. The addAttribute (" TMP ", TMP); 
If (ans & lt; 3) 
Return "wrong"; 
The else 
Return "welcome"; 
} 

@ RequestMapping (value="https://bbs.csdn.net/topics/page/Register", produces="text/HTML. Charset=utf-8 ", method=RequestMethod. POST) 
Public String Register (it request, HttpServletResponse response, String name, String PWD) throws IOException {
A Boolean flag=userService. UserRegister (name, PWD). 
//a Boolean flag=true; 
String TMP=flag?" Registered success ":" failure "; 
The HttpSession session=request. GetSession (); 
The session. The setAttribute (" TMP ", TMP); 
If (flag) 
The return of "redirect:../index. The JSP "; 
The else 
Return "wrong"; 
} 
} 

UserService

 
Package com. Service; 

The import com. Dao. UserMapper; 
The import org. Springframework. Stereotype. Service; 
The import org. Springframework. Transaction. The annotation. Transactional; 
The import com. Po. The User; 

The import javax.mail. The annotation. The Resource; 
import java.util.HashMap; 
Import the Java. Util. The Map; 

@ Service 
Public class UserService {
@ the Resource 
Public UserMapper UserMapper. 

@ Transactional 
Public Boolean userRegister (String name, String PWD) 
{
Map The map=new HashMap<> (a); 
The map. The put (" name ", name); 
The map. The put (" PWD ", PWD); 
Int ans=userMapper. AddUser (map); 
//int ans=1; 
Return ans> 0; 
} 

@ Transactional 
Public int userLogin (String name, String PWD) {
If (name==null | | PWD==null) 
return 0; 
User User=userMapper. GetUserByName (name); 
//User User=null; 
If (user==null) 
return 1; 
Else if (user. GetPwd (.) the equals (PWD)) 
Return 3; 
The else 
return 2; 
} 
} 

Pom file

 
<? The XML version="1.0" encoding="utf-8"?> 
 4.0.0 & lt;/modelVersion> 

 Org. Example 

          

          

            
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