Spring（十一）—— Spring表达式SPEL

 1 package com.gyf.model;
 2 
 3 public class Address {
 4     private String name;
 5 
 6     public String getName() {
 7         return name;
 8     }
 9 
10     public void setName(String name) {
11         this.name = name;
12     }
13 
14     @Override
15     public String toString() {
16         return "Address{" +
17                 "name=‘" + name + ‘\‘‘ +
18                 ‘}‘;
19     }
20 }

 1 package com.gyf.model;
 2 
 3 public class Customer {
 4     private String name;
 5     private String sex="男";
 6     private double pi;
 7     private Address address;
 8 
 9     public Address getAddress() {
10         return address;
11     }
12 
13     public void setAddress(Address address) {
14         this.address = address;
15     }
16 
17     public String getName() {
18         return name;
19     }
20 
21     public void setName(String name) {
22         this.name = name;
23     }
24 
25     public String getSex() {
26         return sex;
27     }
28 
29     public void setSex(String sex) {
30         this.sex = sex;
31     }
32 
33     public double getPi() {
34         return pi;
35     }
36 
37     public void setPi(double pi) {
38         this.pi = pi;
39     }
40 
41     @Override
42     public String toString() {
43         return "Customer{" +
44                 "name=‘" + name + ‘\‘‘ +
45                 ", sex=‘" + sex + ‘\‘‘ +
46                 ", pi=" + pi +
47                 ‘}‘;
48     }
49 }

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4        xsi:schemaLocation="
 5 http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
 6 
 7     <!--创建一个地址对象-->
 8     <bean id="address" class="com.gyf.model.Address">
 9         <property name="name" value="#{‘天河‘}"></property>
10     </bean>
11 
12     <bean id="customer" class="com.gyf.model.Customer">
13         <property name="name" value="#{‘gyf‘.toUpperCase()}"></property>
14         <!--Math.PI调用静态方法-->
15         <property name="pi" value="#{T(java.lang.Math).PI}"></property>
16         <!--ref引用,一个对象引用另外一个对象，这是写法一
17             <property name="address" ref="address"></property>
18         -->
19         <!--ref引用写法二-->
20         <property name="address" value="#{address}"></property>
21     </bean>
22 
23 </beans>

 1 package com.gyf.test;
 2 
 3 import com.gyf.model.Customer;
 4 
 5 import org.junit.Test;
 6 import org.springframework.context.ApplicationContext;
 7 import org.springframework.context.support.ClassPathXmlApplicationContext;
 8 
 9 public class Lesson08 {
10     /**
11      * SpEL Spring 表达式
12      */
13     @Test
14     public void test1(){
15         ApplicationContext context = new ClassPathXmlApplicationContext("beans8.xml");
16         Customer customer = (Customer) context.getBean("customer");
17         System.out.println(customer.getAddress());
18     }
19 }