chapter02-di-xml（依赖注入）

chapter02-di-xml（依赖注入）

目录

一.setter注入（设置注入）

1.简单类型的set注入

2.引用类型的setter注入

二.构造注入

1.构造注入

 2.按名称注入和按类型注入

3.多个配置文件的整合

---

一.setter注入（设置注入） 1.简单类型的set注入

package edu.tjdz.ba01;

public class Student {

    private String name;
    private int age;

    public Student(){
        System.out.println("Spring会调用类的无参数构造方法创建对象");
    }

    public void setEmail(String email){
        System.out.println("setEmail="+email);
    }

    
    public void setName(String name) {
        System.out.println("setName="+name);
        this.name = name.toUpperCase();
    }

    public void setAge(int age) {
        System.out.println("setAge="+age);
        this.age = age;
    }

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

package edu.tjdz;

import edu.tjdz.ba01.Student;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.Date;

public class MyTest {

    @Test
    public void test01(){
        System.out.println("===test01===");
        String config = "ba01/applicationContext.xml";
        ApplicationContext ac = new ClassPathXmlApplicationContext(config);

        //从容器中获取Student对象
        Student myStudent = (Student) ac.getBean("myStudent");
        System.out.println("student对象="+myStudent);

        Date myDate = (Date) ac.getBean("mydate");
        System.out.println("mydate="+myDate);

    }

    @Test
    public void test02(){
        System.out.println("===test02===");
    }
}

2.引用类型的setter注入

package edu.tjdz.ba02;

public class School {

    private String name;
    private String address;

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

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "School{" +
                "name='" + name + ''' +
                ", address='" + address + ''' +
                '}';
    }
}

package edu.tjdz.ba02;

public class Student {

    private String name;
    private int age;

    //声明一个引用类型
    private School school;

    public Student(){
        System.out.println("Spring会调用类的无参数构造方法创建对象");
    }

    public void setName(String name) {
        System.out.println("setName="+name);
        this.name = name;
    }

    public void setAge(int age) {
        System.out.println("setAge="+age);
        this.age = age;
    }

    public void setSchool(School school) {
        System.out.println("setSchool="+school);
        this.school = school;
    }

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

package edu.tjdz;

import edu.tjdz.ba02.School;
import edu.tjdz.ba02.Student;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.Date;

public class MyTest02 {

    @Test
    public void test01(){
        System.out.println("===test01===");
        String config = "ba02/applicationContext.xml";
        ApplicationContext ac = new ClassPathXmlApplicationContext(config);

        //从容器中获取Student对象
        Student myStudent = (Student) ac.getBean("myStudent");
        System.out.println("student对象="+myStudent);

    }

    @Test
    public void test02(){
        System.out.println("===test02===");

        Student student = new Student();

        student.setName("zhangsan");
        student.setAge(20);

        School school = new School();
        school.setName("天津电子");
        school.setAddress("天津");

        student.setSchool(school);

        System.out.println("Student=="+student);
    }
}

二.构造注入 1.构造注入

package edu.tjdz.ba03;

public class School {

    private String name;
    private String address;

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

    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return "School{" +
                "name='" + name + ''' +
                ", address='" + address + ''' +
                '}';
    }
}

package edu.tjdz.ba03;

public class Student {

    private String name;
    private int age;

    //声明一个引用类型
    private School school;

    public Student(){
        System.out.println("Spring会调用类的无参数构造方法创建对象");
    }

    
    public Student(String myname,int myage,School myschool){
        System.out.println("======Student有参数构造方法=======");
        //属性赋值
        this.name=myname;
        this.age=myage;
        this.school=myschool;
    }

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

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

    public void setSchool(School school) {
        this.school = school;
    }

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

 

package edu.tjdz;

import edu.tjdz.ba03.Student;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.io.File;

public class MyTest03 {

    @Test
    public void test01(){
        System.out.println("===test01===");
        String config = "ba03/applicationContext.xml";
        ApplicationContext ac = new ClassPathXmlApplicationContext(config);

        //从容器中获取Student对象
        Student myStudent = (Student) ac.getBean("myStudent3");
        System.out.println("student对象="+myStudent);

        File myfile = (File) ac.getBean("myfile");
        System.out.println("myfile的名字"+myfile.getName());

    }

    @Test
    public void test02(){
        System.out.println("===test01===");
        String config = "ba03/applicationContext.xml";
        ApplicationContext ac = new ClassPathXmlApplicationContext(config);

        //从容器中获取Student对象
        Student myStudent = (Student) ac.getBean("myStudent2");
        System.out.println("student对象="+myStudent);

    }

}

 

 2.按名称注入和按类型注入

package edu.tjdz;

import edu.tjdz.ba04.Student;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;


public class MyTest04 {

    @Test
    public void test01(){
        System.out.println("===test01===");
        String config = "ba04/applicationContext.xml";
        ApplicationContext ac = new ClassPathXmlApplicationContext(config);

        //从容器中获取Student对象
        Student myStudent = (Student) ac.getBean("myStudent");
        System.out.println("student对象="+myStudent);


    }


}

3.多个配置文件的整合

 

package edu.tjdz;

import edu.tjdz.ba06.Student;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;


public class MyTest06 {

    @Test
          public void test01(){
            System.out.println("===test01===");
            String config = "ba06/total.xml";
            ApplicationContext ac = new ClassPathXmlApplicationContext(config);

            //从容器中获取Student对象
            Student myStudent = (Student) ac.getBean("myStudent");
            System.out.println("student对象="+myStudent);


        }


}