今天在使用Spring Boot main方法启动项目时遇到@Autowdired
注解无法注入错误。
错误信息:
Parameter 0 of method setUserService in com.th.controller.SearchController required a bean of type 'com.th.service.UserService' that could not be found.
Action:
Consider defining a bean of type 'com.th.service.UserService' in your configuration.
SearchController代码类:
package com.th.controller;
import java.util.List;
import java.util.stream.Collectors;
import javax.validation.Valid;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.validation.Errors;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
import com.th.model.AjaxResponseBody;
import com.th.model.SearchCriteria;
import com.th.model.User;
import com.th.service.UserService;
@RestController
public class SearchController {
UserService userService;
@Autowired
public void setUserService(UserService userService) {
this.userService = userService;
}
@PostMapping("/api/search")
public ResponseEntity<?> getSearchResultViaAjax(@Valid @RequestBody SearchCriteria search, Errors errors) {
AjaxResponseBody result = new AjaxResponseBody();
if (errors.hasErrors()) {
result.setMsg(
errors.getAllErrors().stream().map(x -> x.getDefaultMessage()).collect(Collectors.joining(",")));
return ResponseEntity.badRequest().body(result);
}
List<User> users = userService.findByUserNameOrEmail(search.getUsername());
if (users.isEmpty()) {
result.setMsg("no user found!");
} else {
result.setMsg("success");
}
result.setResult(users);
return ResponseEntity.ok(result);
}
}
解决:
1、检查对应的service类,controller类有没有在类上注解@Service
,@RestController
2、检查main启动类是否在service层,dao层的上一级,否则程序扫描不到