public class Person { private String name; private int age; public Person(){} public Person(String name, int age) { this.name = name; this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } @Override public String toString() { return "Person [name=" + name + ", age=" + age + "]"; } }
@Test public void testPerson() { ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml"); Person p = (Person) ctx.getBean("p"); System.out.println(p); }
那么通过com.bean.Person这种类型来查找bean,参考代码如下：
@Test public void testPerson() { ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml"); Person p = ctx.getBean(Person.class); System.out.println(p); }
参考代码如下：
@Test public void testPerson() { ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml"); Person p = ctx.getBean("p2",Person.class); System.out.println(p); }这样可以获取到名字叫”李四”的对象。
public class PersonFactory { //静态工厂注入 public static Person getPersonInstance(String name,int age)throws Exception { Person p = (Person)Class.forName("com.bean.Person").newInstance(); Method m = p.getClass().getMethod("setName", java.lang.String.class); m.invoke(p, name); m = p.getClass().getMethod("setAge", int.class); m.invoke(p, age); return p; } } @Test public void testPerson() { ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml"); Person p = (Person) ctx.getBean("p3",new Object[]{"王五",35}); System.out.println(p); } 如果想通过工厂注入属性，在applicationContext.xml配置如下bean:
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