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