Spring依赖注入之复杂类型的注入

1）List、Set、Map、Properties集合注入

实体类

public class User {
    private List hobit;
    private Set subject;
    private Map score;
    private Properties db;

    public User() {
    }

    public User(List hobit, Set subject, Map score, Properties db) {
        this.hobit = hobit;
        this.subject = subject;
        this.score = score;
        this.db = db;
    }

    public List getHobit() {
        return hobit;
    }

    public void setHobit(List hobit) {
        this.hobit = hobit;
    }

    public Set getSubject() {
        return subject;
    }

    public void setSubject(Set subject) {
        this.subject = subject;
    }

    public Map getScore() {
        return score;
    }

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

    public Properties getDb() {
        return db;
    }

    public void setDb(Properties db) {
        this.db = db;
    }

    @Override
    public String toString() {
        return "User{" +
                "hobit=" + hobit +
                ", subject=" + subject +
                ", score=" + score +
                ", db=" + db +
                '}';
    }
}

数据库配置文件（db.properties）

driverClassName = com.mysql.jdbc.Driver
url = jdbc:mysql://localhost:3306/eesy
username = root
password = root

配置文件（applicationContext.xml）

    
    

    
        
            
                电影
                音乐
                阅读
                阅读
            
        

        
            
                Chinese
                Math
                English
                English
            
        

        
            
        

        
    

测试类

public class TestDI {
    @Test
    public void test() {
        ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
        User user = ac.getBean("user", User.class);
        System.out.println(user);
    }
}

测试结果

User{hobit=[电影, 音乐, 阅读, 阅读], subject=[Chinese, Math, English], score={Chinese=80.0, Math=86.0, English=90.0}, db={password=root, url=jdbc:mysql://localhost:3306/eesy, driverClassName=com.mysql.jdbc.Driver, username=root}}

2）引用的方式注入集合

实体类

public class User {
    private List hobit;
    private Set subject;
    private Map score;
    private Properties db;

    public User() {
    }

    public User(List hobit, Set subject, Map score, Properties db) {
        this.hobit = hobit;
        this.subject = subject;
        this.score = score;
        this.db = db;
    }

    public List getHobit() {
        return hobit;
    }

    public void setHobit(List hobit) {
        this.hobit = hobit;
    }

    public Set getSubject() {
        return subject;
    }

    public void setSubject(Set subject) {
        this.subject = subject;
    }

    public Map getScore() {
        return score;
    }

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

    public Properties getDb() {
        return db;
    }

    public void setDb(Properties db) {
        this.db = db;
    }

    @Override
    public String toString() {
        return "User{" +
                "hobit=" + hobit +
                ", subject=" + subject +
                ", score=" + score +
                ", db=" + db +
                '}';
    }
}

数据库配置文件（db.properties）

driverClassName = com.mysql.jdbc.Driver
url = jdbc:mysql://localhost:3306/eesy
username = root
password = root

配置文件（applicationContext.xml）

        
            电影
            音乐
            阅读
            阅读
        

        
            Chinese
            Math
            English
            English
        

        
            
            
            
            
        

        
            scott
            tiger
        

        
        

        
        
            
            
            
            
        

测试类

public class TestDI {
    @Test
    public void test() {
        ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
        User user = ac.getBean("user", User.class);
        System.out.println(user);
    }
}

测试结果

User{hobit=[电影, 音乐, 阅读, 阅读], subject=[Chinese, Math, English], score={Chinese=80.0, Math=86.0, English=90.0}, db={password=root, url=jdbc:mysql://localhost:3306/eesy, driverClassName=com.mysql.jdbc.Driver, username=root}}