IOC操作Bean管理（xml注入集合属性）

超、凢脫俗 2024-04-05 07:04 53阅读 0赞

### 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 ###

a.创建实体类，提供set方法

public class Stu {
        //数组类型
        private String[] courses;
        //list集合类型
        private List<String> list;
        //map集合类型
        private Map<String,String> map;
        //set集合类型注入
        private Set<String> setMaps;
    
        public void setSetMaps(Set<String> setMaps) {
            this.setMaps = setMaps;
        }
    
        public void setCourses(String[] courses) {
            this.courses = courses;
        }
        public void setList(List<String> list) {
            this.list = list;
        }
        public void setMap(Map<String, String> map) {
            this.map = map;
        }
    //做输出测试
        public void test(){
            System.out.println(Arrays.toString(courses));
            System.out.println(list);
            System.out.println(map);
            System.out.println(setMaps);
        }
    
    
    }

b.在Spring配置文件中配置属性

<bean id="stu" class="cn.xs.collection.Stu">
            
            <property name="courses">
                <array>
                    <value>java课程</value>
                    <value>数据库课程</value>
                </array>
            </property>
            
            <property name="list">
                <array>
                    <value>张三</value>
                    <value>李四</value>
                    <value>王五</value>
                    <value>赵六</value>
                </array>
            </property>
            
            <property name="map">
                <map>
                    <entry key="Java" value="java"></entry>
                    <entry key="C" value="c"></entry>
                    <entry key="PHP" value="php"></entry>
                </map>
            </property>
            
            <property name="setMaps">
                <set>
                    <value>Mysql</value>
                    <value>Mybatis</value>
                </set>
            </property>
        </bean>

c.测试

@Test
        public void testCollection(){
            ApplicationContext context = new ClassPathXmlApplicationContext("Bean.xml");
            Stu stu = context.getBean("stu", Stu.class);
            stu.test();
        }

### 4.在集合中设置对象类型的值 ###

<property name="courselist">
                <list>
                    <ref bean="Course1"></ref>
                    <ref bean="Course2"></ref>
                </list>
            </property>

<bean id="Course1" class="cn.xs.collection.Course">
            <property name="cname" value="Mybatis框架"></property>
        </bean>
        <bean id="Course2" class="cn.xs.collection.Course">
            <property name="cname" value="Spring框架"></property>
        </bean>

### 5.使用util标签完成list集合注入提取 ###

public class Book {
        private List<String> list;
    
        public void setList(List<String> list) {
            this.list = list;
        }
        //做输出测试
        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.xsd
                               http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
    
        
        <util:list id="bookList">
            <value>三国演义</value>
            <value>水浒传</value>
            <value>西游记</value>
            <value>红楼梦</value>
        </util:list>
    
        
        <bean id="book" class="cn.xs.collection.Book">
            <property name="list" ref="bookList"></property>
        </bean>
    
    </beans>