Spring配置文件中传值

通过spring提供方法，在配置文件中取传值

 

• 调用get方法 

      targetObject ：指定调用的对象

      propertyPath：指定调用那个getter方法

    例1：

public class Test1 {

	private String name = "nihao";

	public String getName() {
		return name;
	}

}

 

	<bean id="t1" class="i.test.Test1" />

	<!-- name = t1.getName() -->
	<bean id="name"
		class="org.springframework.beans.factory.config.PropertyPathFactoryBean"
		p:targetObject-ref="t1" p:propertyPath="name" />

  

   例2：

public class Test3 {

	private Test1 t1 = new Test1();
	private String name;

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

	public Test1 getT1() {
		return t1;
	}

}

  

	<!-- 将t1的name属性值赋给t3的name -->
	<bean id="t3" class="i.test.Test3">
		<property name="name">
			<!-- 执行t3.getT1().getName() -->
			<bean id="t3.t1.name"
				class="org.springframework.beans.factory.config.PropertyPathFactoryBean" />

		</property>
	</bean>

  

 

• 访问类的Filed属性

public class Test3 {
	public  String name = "nihao";
	public  static final int MAX_LENGTH = 10;
}

 

	<bean id="t3" class="i.test.Test3" />

	<!-- 访问成员Field 需要实例 -->
	<bean id="name"
		class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean"
		p:targetObject-ref="t3" p:targetField="name" />

  

	<!-- 访问静态field只需要类路径 -->
	<bean id="length"
		class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean"
		p:targetClass="i.test.Test3" p:targetField="MAX_LENGTH" />

	<!-- 或者 -->
	<bean id="length"
		class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean"
		p:staticField="i.test.Test3.MAX_LENGTH" />

  

 

•  调用类的方法

public class Test3 {
	public void execute(String str, int i) {
		System.err.println(str + "--" + i);
	}
}

 

	<bean id="t3" class="i.test.Test3" />

	<bean
		class="org.springframework.beans.factory.config.MethodInvokingFactoryBean"
		p:targetObject-ref="t3" p:targetMethod="execute">
		<property name="arguments">
			<list>
				<value>nihao</value>
				<value>56</value>
			</list>
		</property>
	</bean>