Spring:xml注入集合类属性
本文内容纲要：Spring:xml注入集合类属性
使用xml来注入list类型的属性：
1 package com.me.zhuru; 2
3 import java.util.Arrays;
4 import java.util.List;
5 import java.util.Map;
6 import java.util.Set;
7
8 /**
9 * @author sbr
10 * @create 2020-11-09 21:39
11 */
12 public class Stu {
13 //数组类型
14 private String [] course;
15 //list类型
16 private List<String> list;
17 //map类型
18 private Map<String ,String> map;
19 //set类型
20 private Set<String> set;
21
22 public void setCourse(String[] course) {
23 this.course = course;
24 }
25
26 public void setList(List<String> list) {
27 this.list = list;
28 }
29
30 public void setMap(Map<String, String> map) {
31 this.map = map;
32 }
33
34 public void setSet(Set<String> set) {
35 this.set = set;
36 }
37
38 public void print(){
39
40 System.out.println(Arrays.toString(course));
41 System.out.println(list);
42 System.out.println(map);
43 System.out.println(set);
44 }
45 }
Stu.java
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans"
3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
5 <bean id="stu" class="com.me.zhuru.Stu">
6 <!--数组类型-->
7 <property name="course">
8 <array><!--list也可以-->
9 <value>haha</value>
10 <value>bebe</value>
11 </array>
12 </property>
13 <!--list类型-->
14 <property name="list">
15 <list>
16 <value>张三</value>
17 <value>李四</value>
18 </list>
19 </property>
20 <!--map属性-->
21 <property name="map">
22 <map>
23 <entry key="aboluo" value="boboluo"></entry>
24 <entry key="hshs" value="hshs"></entry>
25 </map>
26 </property>
27 <!--set属性注入-->
28 <property name="set">
29 <set>
30 <value>mysql</value>
31 <value>redis</value>
32 </set>
33 </property>
34 </bean>
35
36 </beans>
bean5.xml
传入为list的对象集合时：
1 package com.me.zhuru; 2
3 import java.util.Arrays;
4 import java.util.List;
5 import java.util.Map;
6 import java.util.Set;
7
8 /**
9 * @author sbr
10 * @create 2020-11-09 21:39
11 */
12 public class Stu {
13 //数组类型
14 private String [] course;
15 //list类型
16 private List<String> list;
17 //map类型
18 private Map<String ,String> map;
19 //set类型
20 private Set<String> set;
21
22 private List<Course> listCourse;
23
24 public void setListCourse(List<Course> listCourse) {
25 this.listCourse = listCourse;
26 }
27
28 public void setCourse(String[] course) {
29 this.course = course;
30 }
31
32 public void setList(List<String> list) {
33 this.list = list;
34 }
35
36 public void setMap(Map<String, String> map) {
37 this.map = map;
38 }
39
40 public void setSet(Set<String> set) {
41 this.set = set;
42 }
43
44 public void print(){
45
46 System.out.println(Arrays.toString(course));
47 System.out.println(list);
48 System.out.println(map);
49 System.out.println(set);
50 System.out.println(listCourse);
51 }
52 }
Stu.java
1 package com.me.zhuru; 2
3 /**
4 * @author sbr
5 * @create 2020-11-09 21:53
6 */
7 public class Course {
8 private String courseName;
9
10 public void setCourseName(String courseName) {
11 this.courseName = courseName;
12 }
13
14 @Override
15 public String toString() {
16 return "Course{" +
17 "courseName='" + courseName + '\'' +
18 '}';
19 }
20 }
Course.java
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans"
3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
5 <bean id="stu" class="com.me.zhuru.Stu">
6 <!--数组类型-->
7 <property name="course">
8 <array><!--list也可以-->
9 <value>haha</value>
10 <value>bebe</value>
11 </array>
12 </property>
13 <!--list类型-->
14 <property name="list">
15 <list>
16 <value>张三</value>
17 <value>李四</value>
18 </list>
19 </property>
20 <!--map属性-->
21 <property name="map">
22 <map>
23 <entry key="aboluo" value="boboluo"></entry>
24 <entry key="hshs" value="hshs"></entry>
25 </map>
26 </property>
27 <!--set属性注入-->
28 <property name="set">
29 <set>
30 <value>mysql</value>
31 <value>redis</value>
32 </set>
33 </property>
34
35
36 <property name="listCourse">
37 <list>
38 <ref bean="course1"></ref>
39 <ref bean="course2"></ref>
40 </list>
41
42 </property>
43 </bean>
44
45 <bean id="course1" class="com.me.zhuru.Course" ><property name="courseName" value="hsh"></property></bean>
46 <bean id="course2" class="com.me.zhuru.Course" ><property name="courseName" value="sss"></property></bean>
47 </beans>
bean5.xml
当一个集合作为多个注入源的时候这样的代码太多，因此有简单的方法
1.在Spring配置文件中引入命名空间util
2.使用util标签完成list集合注入提取
1 package com.me.zhuru; 2
3 import java.util.List;
4
5 /**
6 * @author sbr
7 * @create 2020-11-09 22:06
8 */
9 public class Book {
10 private List<String> list;
11
12 public void setList(List<String> list) {
13 this.list = list;
14 }
15
16 public void book(){
17 System.out.println(list.toString());
18 }
19 }
Book.java
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans"
3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4 xmlns:util="http://www.springframework.org/schema/util"
5 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
6 http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
7 <!--提取list集合类型属性注入-->
8 <util:list id="booklist">
9 <value>叔叔</value>
10 <value>啊哈哈</value>
11 </util:list>
12
13 <bean id="book" class="com.me.zhuru.Book">
14 <property name="list" ref="booklist"></property>
15
16 </bean>
17 </beans>
bean6.xml
@Test public void test7(){
ApplicationContext context = new ClassPathXmlApplicationContext("bean6.xml");
Book book = context.getBean("book",Book.class);
book.book();
}
注意：
需要对应，如果是bean集合的话，需要用ref而不是value
本文内容总结：Spring:xml注入集合类属性
原文链接：https://www.cnblogs.com/songboran/p/13951099.html
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