xml注入集合屬性

1.注入數組類型屬性

2.注入List集合類型屬性

3.注入Map集合類型屬性

（1）創建類，定義數組，list，map，set類型屬性，生成對應set方法

package com.atguigu.collectiontype;import java.util.List; import java.util.Map; import java.util.Set;public class Stu {//1.數組類型屬性private String[] courses;//2.List集合類型屬性private List<String> list;//3.map集合類型屬性private Map<String,String> maps;//4.set集合類型屬性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配置文件中進行配置

<?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.集合類型屬性注入--><bean id = "stu" class = "com.atguigu.collectiontype.Stu"><!--數組類型屬性注入--><property name="courses"><array><value>java課程</value><value>數據庫課程</value></array></property><!--list類型屬性注入--><property name="list"><list><value>張三</value><value>小三</value></list></property><!--map類型屬性注入--><property name="maps"><map><entry key = "JAVA" value="java"></entry><entry key = "PHP" value="php"></entry></map></property><!--set類型屬性注入--><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();} }

在集合里面設置對象類型值

package com.atguigu.collectiontype;public class Course {private String cname;//課程名稱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.數組類型屬性private String[] courses;//2.List集合類型屬性private List<String> list;//3.map集合類型屬性private Map<String,String> maps;//4.set集合類型屬性private Set<String> sets;//學生所學多門課程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.集合類型屬性注入--><bean id = "stu" class = "com.atguigu.collectiontype.Stu"><!--數組類型屬性注入--><property name="courses"><array><value>java課程</value><value>數據庫課程</value></array></property><!--list類型屬性注入--><property name="list"><list><value>張三</value><value>小三</value></list></property><!--map類型屬性注入--><property name="maps"><map><entry key = "JAVA" value="java"></entry><entry key = "PHP" value="php"></entry></map></property><!--set類型屬性注入--><property name="sets"><set><value>MySQL</value><value>Redis</value></set></property><!--注入list集合類型，值是對象--><property name="courseList"><list><ref bean="course1"></ref><ref bean = "course2"></ref></list></property></bean><!--創建多個course對象--><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>

測試：

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來

（1）在spring配置文件中引入名稱空間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標簽完成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集合類型屬性注入--><util:list id = "bookList"><value>易筋經</value><value>九陰真經</value><value>九陽神功</value></util:list><!--2.提取list集合類型屬性注入使用--><bean id = "book" class = "com.atguigu.spring.collectiontype.Book"><property name="list" ref = "bookList"></property></bean></beans>

測試：

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();}}

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