真经|神功_[Spring5]IOC容器_Bean管理XML方式_注入集合类型属性

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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

&＃xff08;1&＃xff09;创建类&＃xff0c;定义数组&＃xff0c;list&＃xff0c;map&＃xff0c;set类型属性&＃xff0c;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 &＃61; sets;

public void setList(List<String> list)
this.list &＃61; list;

public void setMaps(Map<String, String> maps)
this.maps &＃61; maps;

public void setCourses(String[] courses)

this.courses &＃61; courses;


public void test()

System.out.println(Arrays.toString(courses));
System.out.println(list);
System.out.println(maps);
System.out.println(sets);




&＃xff08;2&＃xff09;在spring配置文件中进行配置


<beans xmlns&＃61;"http://www.springframework.org/schema/beans"
xmlns:xsi&＃61;"http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation&＃61;"http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">



<property name&＃61;"courses">
<array>
<value>java课程value>
<value>数据库课程value>
array>
property>

<property name&＃61;"list">
<list>
<value>张三value>
<value>小三value>
list>
property>


<property name&＃61;"maps">
<map>

entry>
php" value&＃61;"php">
entry>
map>
property>

<property name&＃61;"sets">
<set>
<value>mysqlvalue>
<value>Redisvalue>
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
&＃64;Test
public void testCollection()

ApplicationContext context &＃61; new ClassPathXmlApplicationContext("bean5.xml");
Stu stu &＃61; 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 &＃61; cname;

&＃64;Override
public String toString()
return "Course" &＃43;
"cname&＃61;&＃39;" &＃43; cname &＃43; &＃39;\\&＃39;&＃39; &＃43;
&＃39;&＃39;;




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 &＃61; courseList;

public void setSets(Set<String> sets)
this.sets &＃61; sets;

public void setList(List<String> list)
this.list &＃61; list;

public void setMaps(Map<String, String> maps)
this.maps &＃61; maps;

public void setCourses(String[] courses)

this.courses &＃61; 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);





<beans xmlns&＃61;"http://www.springframework.org/schema/beans"
xmlns:xsi&＃61;"http://www.w3.org/2001/XMLSchema-instance" xmlns:util&＃61;"http://www.springframework.org/schema/util"
xsi:schemaLocation&＃61;"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">



<property name&＃61;"courses">
<array>
<value>java课程value>
<value>数据库课程value>
array>
property>

<property name&＃61;"list">
<list>
<value>张三value>
<value>小三value>
list>
property>


<property name&＃61;"maps">
<map>

entry>

entry>
map>
property>

<property name&＃61;"sets">
<set>
<value>MySQLvalue>
<value>Redisvalue>
set>
property>

<property name&＃61;"courseList">
<list>
<ref bean&＃61;"course1">ref>
ref>
list>
property>
bean>


<property name&＃61;"cname" value&＃61;"Spring5框架">

property>


bean>

<property name&＃61;"cname" value&＃61;"MySql5框架">
property>
bean>


beans>


测试&＃xff1a;

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
&＃64;Test
public void testCollection()

ApplicationContext context &＃61; new ClassPathXmlApplicationContext("bean5.xml");
Stu stu &＃61; context.getBean("stu", Stu.class);
stu.test();




把集合注入部分提取出来

&＃xff08;1&＃xff09;在spring配置文件中引入名称空间util


<beans xmlns&＃61;"http://www.springframework.org/schema/beans"
xmlns:xsi&＃61;"http://www.w3.org/2001/XMLSchema-instance"
xmlns:util&＃61;"http://www.springframework.org/schema/util"
xsi:schemaLocation&＃61;"http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">

beans>


&＃xff08;2&＃xff09;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 &＃61; list;

public void test()

System.out.println(list);





<beans xmlns&＃61;"http://www.springframework.org/schema/beans"
xmlns:xsi&＃61;"http://www.w3.org/2001/XMLSchema-instance"
xmlns:util&＃61;"http://www.springframework.org/schema/util"
xsi:schemaLocation&＃61;"http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">


<value>易筋经value>
<value>九阴真经value>
<value>九阳神功value>
util:list>



property>
bean>
beans>


测试&＃xff1a;

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
&＃64;Test
public void testCollection()

ApplicationContext context &＃61; new ClassPathXmlApplicationContext("bean1.xml");
Book book &＃61; context.getBean("book", Book.class);
book.test();