java - 当我添加新的存储库和服务时，Spring 框架 bean 工厂不满意

Question

我对 Spring 框架还是新手。我的客户使用spring框架+boot+swagger。

我尝试添加新的 Dao 作为存储库，如下所示:

package com.api.elastic.repository;

import java.util.List;

import com.api.elastic.entity.Terminal;

public interface TerminalDao {
    public boolean isExist(String p_index);
    public List<Terminal> findById();
    public List<Terminal> findAll();
    public List<String> getDataByDatabaseId(Integer id);

}

然后我添加服务:

package com.api.elastic.service;

import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.api.elastic.entity.Terminal;
import com.api.elastic.repository.TerminalDao;

@Service
public class TerminalService {
    Logger logger = LoggerFactory.getLogger(getClass());

    @Autowired
    TerminalDao terminalDao;

    public boolean isExist(String p_index) {
        return terminalDao.isExist(p_index);
    }

    public List<Terminal> findAll() {
        List<Terminal> listData = terminalDao.findAll();
        return listData;
    }

    public List<Terminal> findById(int id) {
        List<Terminal> listData = terminalDao.findById();
        return listData;
    }

    public List<String> getDataByDatabaseId(Integer id) {
        return terminalDao.getDataByDatabaseId(id);
    }


}

最后，这是我的其余 api Controller 也将添加到 swagger 中:

package com.api.elastic.controller;

import java.util.ArrayList;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
//import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import com.api.elastic.entity.Terminal;
import com.api.elastic.model.RestResponseModel;
import com.api.elastic.service.PkService;
import com.api.elastic.service.TerminalService;
import com.api.elastic.utils.MessageDetail;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;


@CrossOrigin(origins = "*")
@RestController
@RequestMapping(value = "terminal")
@SuppressWarnings({ "rawtypes", "unchecked" })
@Api(value = "Terminal API", description = "Operations pertaining to Terminal", tags = "Terminal")
public class TerminalController {

    Logger logger = LoggerFactory.getLogger(getClass());

    @Autowired
    TerminalService terminalService;

    @ApiOperation(value = "Finde All Terminal", response = RestResponseModel.class)
    @GetMapping("/list")
    public ResponseEntity<RestResponseModel<Terminal>> findTerminalIndex() {

        List<Terminal> list = terminalService.findAll();
        int totalRow = 0;
        if (null != list) totalRow = list.size();

        RestResponseModel<Terminal> resp = new RestResponseModel<Terminal>();
        resp.setContent(list);
        resp.setTotalRow(totalRow);
        logger.info("totalRow : " + totalRow);
        MessageDetail info = new MessageDetail();
        if (totalRow == 0) {
            logger.info("NO_CONTENT ....");
            info.setMessage(HttpStatus.NO_CONTENT.name());
            info.setStatus(HttpStatus.NO_CONTENT.value());
            resp.setInfo(info);
            return new ResponseEntity<RestResponseModel<Terminal>>(resp, HttpStatus.OK);
        } else {
            info.setMessage(HttpStatus.OK.name());
            info.setStatus(HttpStatus.OK.value());
            resp.setInfo(info);
            return new ResponseEntity<RestResponseModel<Terminal>>(resp, HttpStatus.OK);
        }
    }

    @ApiOperation(value = "Get Data By Database Id", response = RestResponseModel.class)
    @RequestMapping(value="/list/{id}", method= RequestMethod.GET)
    public ResponseEntity<RestResponseModel<Terminal>> getDataByDatabaseId(@PathVariable("id") Integer id) {
        RestResponseModel<Terminal> resp = new RestResponseModel<Terminal>();
        List<Terminal> list = terminalService.findById(id);
        int totalRow = 0;
        if (null != list) totalRow = list.size();
        resp.setContent(list);
        resp.setTotalRow(totalRow);
        logger.info("totalRow : " + totalRow);
        MessageDetail info = new MessageDetail();   
        return new ResponseEntity<RestResponseModel<Terminal>>(resp, HttpStatus.OK);
    }

}

当我运行时出现这样的错误:

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'terminalService': Unsatisfied dependency expressed through field 'terminalDao'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'id.co.bca.api.elastic.repository.TerminalDao' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

老实说，我尝试了谷歌，但这个项目中没有pom.xml。

那么如何解决这个问题呢？

Answer 1

您定义了一个名为 TerminalDAO 的接口(interface)，但没有此类的实现。

你应该有这样的东西

@Component
class TerminalDaoImpl implements TerminalDao {
 public ....
}

请记住，如果您尝试使用 Spring Data，则应该以其他方式执行此操作，只需按照 how to define a repository 上的文档进行操作即可。