注入依赖：
注入：bean的所有属性都由容器来注入
依赖：bean的所有配置都离不开容器
附：学习spring可以直接看文档
基于setter配置
1，使用list将集合输出（需要的jar包上一章有），主要区分value和ref的使用区别
value：即字面量属性
ref：非字面量属性
接下来看代码，新建两个javabean，建在pojo包下
代码分别为
Student.java
package pojo; public class Student { private String name; private Integer id; public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } @Override public String toString() { return "name=" + name + "," + "id=" + id; } }
UserQaq
package pojo; import java.util.List; import java.util.Map; import java.util.Set; public class UserQaq { private String name; private Integer age; private List<Student> list1; private List<Integer> list2; private Set<Student> set1; private Set<String> set2; private Map<Integer,String> map1; public Map<String, Student> getMap2() { return map2; } public void setMap2(Map<String, Student> map2) { this.map2 = map2; } private Map<String,Student> map2; public Map<Integer, String> getMap1() { return map1; } public void setMap1(Map<Integer, String> map1) { this.map1 = map1; } public Set<Student> getSet1() { return set1; } public void setSet1(Set<Student> set1) { this.set1 = set1; } public Set<String> getSet2() { return set2; } public void setSet2(Set<String> set2) { this.set2 = set2; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } public List<Student> getList1() { return list1; } public void setList1(List<Student> list1) { this.list1 = list1; } public List<Integer> getList2() { return list2; } public void setList2(List<Integer> list2) { this.list2 = list2; } @Override public String toString() { return "name = " + name + "\n" + "age=" + age + "\n" + "list1 = " + list1 + "\n" + "list2" + list2 + "\n" + "set1=" + set1 + "\n" + "set2" + set2 + "\n" + "map1=" + map1 + "\n" + "map2" + map2; } }
在容器中配置xml文件,新建一个applicationContext.xml文件
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <bean id="userQaq" class="pojo.UserQaq"> <property name="name" value="蔡康程"></property> <property name="age" value="21"></property> <property name="list1"> <!--非字面量属性ref，如此属性，不能写成字符串的属性--> <list> <ref bean="student1"></ref> <ref bean="student2"></ref> <ref bean="student3"></ref> <ref bean="student4"></ref> <ref bean="student5"></ref> </list> </property> <property name="list2"> <list> <!--字面量属性使用value--> <value>1234</value> <value>2345</value> <value>3456</value> <value>4567</value> </list> </property> <property name="set1"> <set> <ref bean="student1"></ref> <ref bean="student2"></ref> <ref bean="student3"></ref> <ref bean="student4"></ref> <ref bean="student5"></ref> </set> </property> <property name="set2"> <set> <value>qaq</value> <value>qqq</value> <value>qwq</value> <value>qeq</value> <value>qrq</value> </set> </property> <property name="map1"> <map> <entry key="123" value="红楼梦"></entry> <entry key="456" value="三国演义"></entry> </map> </property> <property name="map2"> <map> <entry key="123" value-ref="student1"></entry> <entry key="456" value-ref="student2"></entry> <entry key="123" value-ref="student3"></entry> <entry key="456" value-ref="student4"></entry> <entry key="123" value-ref="student5"></entry> </map> </property> </bean> <bean id="student1" class="pojo.Student"> <property name="id" value="123"></property> <property name="name" value="李海乐"></property> </bean> <bean id="student2" class="pojo.Student"> <property name="id" value="133"></property> <property name="name" value="钟华金"></property> </bean> <bean id="student3" class="pojo.Student"> <property name="id" value="143"></property> <property name="name" value="易景亮"></property> </bean> <bean id="student4" class="pojo.Student"> <property name="id" value="153"></property> <property name="name" value="渣男"></property> </bean> <bean id="student5" class="pojo.Student"> <property name="id" value="163"></property> <property name="name" value="万翀"></property> </bean> </beans>
接下来写测试类
package tool; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import pojo.UserQaq; public class TestUserQaq { public static void main(String[] args) { ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml"); UserQaq userQaq = (UserQaq) context.getBean("userQaq"); System.out.println(userQaq); } }
最后可以发现，在idea中出现此标志
测试成功！
