关于autowire注解，在没有写set方法的的情况下，如何将值注入进去

最新推荐文章于 2023-10-14 13:31:59 发布

dajiajia2015

最新推荐文章于 2023-10-14 13:31:59 发布

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分类专栏： Spring

本文链接：https://blog.youkuaiyun.com/dajiajia2015/article/details/103617751

本文通过一个例子展示了在没有set方法的情况下，如何使用Autowire注解将Spring容器中的DepartmentDao实例注入到EmployeeHandler对象中。通过分析UnsafeObjectFieldAccessorImpl类的结构图，揭示了注入的实现细节。

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问题的代码详细演示


@Repository
public class EmployeeDao {
   
   

	private static Map<Integer, Employee> employees = null;
	
	@Autowired
	private DepartmentDao departmentDao;
	
	static{
   
   
		employees = new HashMap<Integer, Employee>();

		employees.put(1001, new Employee(1001, "E-AA", "aa@163.com", 1, new Department(101, "D-AA")));
		employees.put(1002, new Employee(1002, "E-BB", "bb@163.com", 1, new Department(102, "D-BB")));
		employees.put(1003, new Employee(1003, "E-CC", "cc@163.com", 0, new Department(103, "D-CC")));
		employees.put(1004, new Employee(1004, "E-DD", "dd@163.com", 0, new Department(104, "D-DD")));
		employees.put(1005, new Employee(1005, "E-EE", "ee@163.com", 1, new Department(105, "D-EE")));
	}
	
	private static Integer initId = 1006;
	
	public void save(Employee employee){
   
   
		if(employee.getId() == null){
   
   
			employee.setId(initId++);
		}
		
		employee.setDepartment(departmentDao.getDepartment(employee.getDepartment().getId()));
		employees.put