spirng ioc

目录

spring ioc

1 控制反转，创建对象

1.1  无参构造函数

1.2 set方式

1.3 工厂模式 

2 依赖注入

2.1 手动注入

2.1.1 有参构造函数注入

2.1.2 set方法注入

2.2 自动注入

2.2.1 set 方式自动注入

2.2.2 有参构造函数自动注入

2.3 特殊构造函数注入

 3 测试方法

需要用到的类对象

---

spring ioc

1 控制反转，创建对象

1.1  无参构造函数

1.2 set方式

1.3 工厂模式 

 

2 依赖注入

2.1 手动注入

2.1.1 有参构造函数注入

2.1.2 set方法注入

2.2 自动注入

2.2.1 set 方式自动注入

根据名称进行注入

 根据类型进行注入

2.2.2 有参构造函数自动注入

有参构造函数自动注入，需要保证有参构造函数的参数都存在，即该 xml 文件中 创建全部参数的 bean 对象

2.3 特殊构造函数注入

    
        
        
        
        
        
    
    
        
        
    
    
        
        
    
    
    
        
            
                
                
            
        
        
            
                a
                b
                c
            
        
        
    

 3 测试方法

    @Test
    public void test1() {
        /**
         * bean-service.xml 指代的是，xml 文件
         * orderManagerSet 指代的是 bean 标签中的 name 的值
         * 
         *         
         *  
         */
        ApplicationContext ac = new ClassPathXmlApplicationContext("bean-service.xml");
        OrderManagerSet orderManagerSet = (OrderManagerSet) ac.getBean("orderManagerSet");
        orderManagerSet.getOrder();
    }

注意测试的时候，xml 文件所在的 resource 文件夹，一定要手动的指定为 Resource Root ，否则的话，即使使用绝对路径在测试的时候，也会报 找不到 xml 文件的错误。 

在写的时候，文件夹有点乱，如果直接拷贝 xml 的文件内容，需要手动的修改 class 的路径 

 

需要用到的类对象

/**
 * @author yangLongFei 2020-12-24-15:19
 */
public interface OrderService {
    public void getOrder();
}

/**
 * @author yangLongFei 2020-12-24-15:20
 */
public class OrderServiceImpl implements OrderService {
    @Override
    public void getOrder() {
        System.out.println("this is com.sys.yang.standard.OrderServiceImpl.getOrder ");
    }
}

/**
 * @author yangLongFei 2020-12-24-15:48
 */
public class OrderManagerSet {

    private OrderServiceImpl orderService;

    /**
     * 有参构造器
     */
    public OrderManagerSet(OrderServiceImpl orderService) {
        System.out.println("有参构造器，com.sys.yang.standard.OrderManagerSet.OrderManagerSet(com.sys.yang.standard.OrderServiceImpl)");
        this.orderService = orderService;
    }

    /**
     * 无参构造器
     */
    public OrderManagerSet() {
        System.out.println("无参构造器， com.sys.yang.standard.OrderManagerSet.OrderManagerSet()");
    }

    /**
     * set 方法
     */
    public void setOrderService(OrderServiceImpl orderService) {
        System.out.println("set方法 com.sys.yang.standard.OrderManagerSet.setOrderService");
        this.orderService = orderService;
    }

    public void getOrder() {
        orderService.getOrder();
        System.out.println("this is com.sys.yang.standard.OrderManagerSet");
    }

}

/**
 * @author yangLongFei 2020-12-24-20:34
 */
public interface Father {
    void getSoon();
}

/**
 * @author yangLongFei 2020-12-24-20:35
 */
public class Soon1 implements Father {
    @Override
    public void getSoon() {
        System.out.println("this is com.sys.yang.standard.factory.Soon1");
    }
}

/**
 * @author yangLongFei 2020-12-24-20:35
 */
public class Soon2 implements Father {
    @Override
    public void getSoon() {
        System.out.println("this is com.sys.yang.standard.factory.Soon2 !!!!!!!!!!!!!!!!!!!");
    }
}

/**
 * @author yangLongFei 2020-12-24-20:36
 */
public class FactherFactory {

    public Father getSoon1() {
        return new Soon1();
    }

    public Father getSoon2() {
        return new Soon2();
    }

}

/**
 * @author yangLongFei 2020-12-24-16:52
 */
public class Score {
    private String type;
    private char level;

    public Score() {
    }

    public Score(String type, char level) {
        this.type = type;
        this.level = level;
    }

    @Override
    public String toString() {
        return "Score{" +
                "type='" + type + '\'' +
                ", level=" + level +
                '}';
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public double getLevel() {
        return level;
    }

    public void setLevel(char level) {
        this.level = level;
    }
}

/**
 * @author yangLongFei 2020-12-24-16:10
 */
public class Student {
    private int id;
    private String name;
    private String age;

    private Score score;

    @Override
    public String toString() {
        return "Student{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", age='" + age + '\'' +
                ", score=" + score +
                '}';
    }

    public Student() {
        System.out.println("student 无参构造函数 com.sys.yang.standard2.Student.Student()");
    }

    public Student(int id, String name, String age) {
        System.out.println("student 有参构造函数 com.sys.yang.standard2.Student.Student(int, java.lang.String, java.lang.String)");
        this.id = id;
        this.name = name;
        this.age = age;
    }

    public Student(int id, String name, String age, Score score) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.score = score;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Score getScore() {
        return score;
    }

    public void setScore(Score score) {
        this.score = score;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }
}

import java.util.Arrays;
import java.util.List;

/**
 * @author yangLongFei 2020-12-24-19:22
 */
public class StudentDto {
    private Student student;
    private List scoreList;
    private String[] stringArray;

    public StudentDto(Student student, List scoreList, String[] stringArray) {
        this.student = student;
        this.scoreList = scoreList;
        this.stringArray = stringArray;
    }

    public StudentDto() {

    }


    @Override
    public String toString() {
        return "StudentDto{" +
                "student=" + student +
                ", scoreList=" + scoreList +
                ", stringArray=" + Arrays.toString(stringArray) +
                '}';
    }

    public Student getStudent() {
        return student;
    }

    public void setStudent(Student student) {
        this.student = student;
    }

    public List getScoreList() {
        return scoreList;
    }

    public void setScoreList(List scoreList) {
        this.scoreList = scoreList;
    }

    public String[] getStringArray() {
        return stringArray;
    }

    public void setStringArray(String[] stringArray) {
        this.stringArray = stringArray;
    }
}