Spring之DL

pojo-User

package com;

public class User {
    private int id;
    private String name;

    public User() {
    }

    public User(int id, String name) {
        this.id = id;
        this.name = name;
    }

    public int getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

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

普通Set注入

xml

    <bean id="UserSet1" class="com.User">
        <property name="id" value="1"/>
        <property name="name" value="t1"/>
    </bean>

test文件

public class test {
    @Test
    public void testSet(){
        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
        User userSet1 = (User) context.getBean("UserSet1");
        System.out.println(userSet1);
    }
}

output:User{id=1, name=‘t1’}

p命名空间

xml

    <bean id="UserSet2" class="com.User" p:id="2" p:name="t2"/>

test

public class test {
    @Test
    public void testSet(){
        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
        User userSet2 = (User) context.getBean("UserSet2");
        System.out.println(userSet2);
    }
}

output:User{id=2, name=‘t2’}

普通构造器注入

xml

    <bean id="UserCon1" class="com.User">
        <constructor-arg name="id" value="3"/>
        <constructor-arg name="name" value="t3"/>
    </bean>

    <bean id="UserCon2" class="com.User" c:id="4" c:name="t4"/>

test

public void testCon(){
        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
        User userCon1 = (User) context.getBean("UserCon1");
        System.out.println(userCon1);
        User userCon2 = (User) context.getBean("UserCon2");
        System.out.println(userCon2);
    }

User{id=3, name=‘t3’}
User{id=4, name=‘t4’}