xml注入集合属性
1.注入数组类型属性
2.注入List集合类型属性
3.注入Map集合类型属性
(1)创建类,定义数组,list,map,set类型属性,生成对应set方法
package com.atguigu.collectiontype;import java.util.List;
import java.util.Map;
import java.util.Set;public class Stu {//1.数组类型属性private String[] courses;//2.List集合类型属性private List<String> list;//3.map集合类型属性private Map<String,String> maps;//4.set集合类型属性private Set<String> sets;public void setSets(Set<String> sets) {this.sets = sets;}public void setList(List<String> list) {this.list = list;}public void setMaps(Map<String, String> maps) {this.maps = maps;}public void setCourses(String[] courses){this.courses = courses;}public void test(){System.out.println(Arrays.toString(courses));System.out.println(list);System.out.println(maps);System.out.println(sets);}}
(2)在spring配置文件中进行配置
<?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"><!--1.集合类型属性注入--><bean id = "stu" class = "com.atguigu.collectiontype.Stu"><!--数组类型属性注入--><property name="courses"><array><value>java课程</value><value>数据库课程</value></array></property><!--list类型属性注入--><property name="list"><list><value>张三</value><value>小三</value></list></property><!--map类型属性注入--><property name="maps"><map><entry key = "JAVA" value="java"></entry><entry key = "PHP" value="php"></entry></map></property><!--set类型属性注入--><property name="sets"><set><value>MySQL</value><value>Redis</value></set></property></bean></beans>
package com.atguigu.test;import com.atguigu.collectiontype.Stu;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;public class testCollection {@Testpublic void testCollection(){ApplicationContext context = new ClassPathXmlApplicationContext("bean5.xml");Stu stu = context.getBean("stu", Stu.class);stu.test();}
}
在集合里面设置对象类型值
package com.atguigu.collectiontype;public class Course {private String cname;//课程名称public void setCname(String cname) {this.cname = cname;}@Overridepublic String toString() {return "Course{" +"cname='" + cname + '\'' +'}';}
}
package com.atguigu.collectiontype;import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Set;public class Stu {//1.数组类型属性private String[] courses;//2.List集合类型属性private List<String> list;//3.map集合类型属性private Map<String,String> maps;//4.set集合类型属性private Set<String> sets;//学生所学多门课程private List<Course> courseList;public void setCourseList(List<Course> courseList) {this.courseList = courseList;}public void setSets(Set<String> sets) {this.sets = sets;}public void setList(List<String> list) {this.list = list;}public void setMaps(Map<String, String> maps) {this.maps = maps;}public void setCourses(String[] courses){this.courses = courses;}public void test(){System.out.println(Arrays.toString(courses));System.out.println(list);System.out.println(maps);System.out.println(sets);System.out.println(courseList);}}
<?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:util="http://www.springframework.org/schema/util"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd"><!--1.集合类型属性注入--><bean id = "stu" class = "com.atguigu.collectiontype.Stu"><!--数组类型属性注入--><property name="courses"><array><value>java课程</value><value>数据库课程</value></array></property><!--list类型属性注入--><property name="list"><list><value>张三</value><value>小三</value></list></property><!--map类型属性注入--><property name="maps"><map><entry key = "JAVA" value="java"></entry><entry key = "PHP" value="php"></entry></map></property><!--set类型属性注入--><property name="sets"><set><value>MySQL</value><value>Redis</value></set></property><!--注入list集合类型,值是对象--><property name="courseList"><list><ref bean="course1"></ref><ref bean = "course2"></ref></list></property></bean><!--创建多个course对象--><bean id = "course1" class = "com.atguigu.collectiontype.Course"><property name="cname" value="Spring5框架"></property></bean><bean id = "course2" class = "com.atguigu.collectiontype.Course"><property name="cname" value="MySql5框架"></property></bean></beans>
测试:
package com.atguigu.test;
import com.atguigu.collectiontype.Stu;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;public class testCollection {@Testpublic void testCollection(){ApplicationContext context = new ClassPathXmlApplicationContext("bean5.xml");Stu stu = context.getBean("stu", Stu.class);stu.test();}
}
把集合注入部分提取出来
(1)在spring配置文件中引入名称空间util
<?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:util="http://www.springframework.org/schema/util"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd"></beans>
(2)使用util标签完成list集合注入提取
package com.atguigu.spring.collectiontype;import java.util.List;public class Book {private List<String> list;public void setList(List<String> list){this.list = list;}public void test(){System.out.println(list);}
}
<?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:util="http://www.springframework.org/schema/util"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd"><!--1.提取list集合类型属性注入--><util:list id = "bookList"><value>易筋经</value><value>九阴真经</value><value>九阳神功</value></util:list><!--2.提取list集合类型属性注入使用--><bean id = "book" class = "com.atguigu.spring.collectiontype.Book"><property name="list" ref = "bookList"></property></bean></beans>
测试:
package com.atguigu.spring.test;import com.atguigu.spring.collectiontype.Book;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;public class testBook {@Testpublic void testCollection(){ApplicationContext context = new ClassPathXmlApplicationContext("bean1.xml");Book book = context.getBean("book", Book.class);book.test();}}