一.使用正常方式
study_spring/src/applicationContext.xml
<bean name="c" class="com.how2java.pojo.Category"> <property name="name" value="category 1" /> </bean> <bean name="p" class="com.how2java.pojo.Product"> <property name="name" value="Product 1" /> <property name="category" ref="c" /> </bean>
/study_spring/src/cn/leokim/pojo/Product.java
package cn.leokim.pojo; public class Product { private int id; private String name; private Category category; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Category getCategory(){ return category; } public void setCategory(Category category){ this.category = category; } }
study_spring/src/cn/leokom/test/TestSpring.java
package cn.leokim.pojo; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.how2java.pojo.Category; import com.how2java.pojo.Product; public class TestSpring { public static void main(String[] args) { ApplicationContext context = new ClassPathXmlApplicationContext( new String[] { "applicationContext.xml" }); // Category c = (Category) context.getBean("c"); Product p = (Product) context.getBean("p"); // System.out.println(c.getName()); System.out.println(p.getCategory().getName()); } }
二.注解方式
study_spring/src/applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <context:annotation-config/> <bean name="c" class="com.how2java.pojo.Category"> <property name="name" value="category 1" /> </bean> <bean name="p" class="com.how2java.pojo.Product"> <property name="name" value="Product 1" /> <!-- <property name="category" ref="c" />--> </bean> </beans>
public class Product { private int id; private String name; // @Autowired @Resource(name="c") private Category category; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Category getCategory(){ return category; } public void setCategory(Category category){ this.category = category; } }
注解方式还可以更简单
1.applicationContext.xml去掉之前的配置,只用一行
<context:component-scan base-package="cn.leokim.pojo"/>
2.在Category上添加注解
@Component("c") public class Category {
3.在product上添加注解
@Component("p") public class Product {
运行出来结果是一样的