属性的注入---P名称空间注入

Java类代码如下：

package org.akita.model;

public class User {
    private String username;
    private String address;
    private Integer age;

    @Override
    public String toString() {
        return "User{" +
                "username='" + username + '\'' +
                ", address='" + address + '\'' +
                ", age=" + age +
                '}';
    }

    public User() {
    }

    public User(String username, String address, Integer age) {
        this.username = username;
        this.address = address;
        this.age = age;
        System.out.println("构造方法被调用");
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getAddress() {
        return address;
    }

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

    public Integer getAge() {
        return age;
    }

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


}

配置文件中属性注入的写法如下：

<bean class="org.akita.model.User" id="user" p:username="akita" p:address="安徽" p:age="25"/>

获取User类对象代码如下:

ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
        User user = ctx.getBean("user", User.class);
        System.out.println(user);

输出如下: