用過Spring框架的我們都知道，每當生成依賴注入的時候，我們都必須生成相應類的set方法，而且要在set方法上面寫上@Autowired，才能實現依賴注入，如下：

package com.kaishengit.web;

import com.kaishengit.service.ProjectService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;

@Controller
public class FolderController {
    private ProjectService projectService;

    //set
    @Autowired
    public void setProjectService(ProjectService projectService) {
        this.projectService = projectService;
    }
}
 

package com.kaishengit.web;

import com.kaishengit.service.ProjectService;
import org.springframework.stereotype.Controller;

import javax.inject.Inject;

@Controller
public class FolderController {
    @Inject
    private ProjectService projectService;


}