Spring-框架-Bean的普通数据装配

迈不过友情╰ 2023-06-08 04:59 10阅读 0赞

通过spring配置文件，将javaBean的普通属性值进行注入。spring通过属性编辑器（PropertyEditor）自动进行属性转换

### 普通类型： ###

代码

package com.spring.connection;
    
    /**
     * JavaBean普通属性值的装配,数据库连接类
     * @ClassName: ConnectionPool
     **/
    public class ConnectionPool {
    
        private String className;
        private String url;
        private String username;
        private String password;
        private String initSize;
        private String maxSize;
    
        public ConnectionPool() {
    
        }
    
        public ConnectionPool(String className, String url, String username, String password, String initSize, String maxSize) {
            this.className = className;
            this.url = url;
            this.username = username;
            this.password = password;
            this.initSize = initSize;
            this.maxSize = maxSize;
        }
    
        public String getClassName() {
            return className;
        }
    
        public void setClassName(String className) {
            this.className = className;
        }
    
        public String getUrl() {
            return url;
        }
    
        public void setUrl(String url) {
            this.url = url;
        }
    
        public String getUsername() {
            return username;
        }
    
        public void setUsername(String username) {
            this.username = username;
        }
    
        public String getPassword() {
            return password;
        }
    
        public void setPassword(String password) {
            this.password = password;
        }
    
        public String getInitSize() {
            return initSize;
        }
    
        public void setInitSize(String initSize) {
            this.initSize = initSize;
        }
    
        public String getMaxSize() {
            return maxSize;
        }
    
        public void setMaxSize(String maxSize) {
            this.maxSize = maxSize;
        }
    
        @Override
        public String toString() {
            return "ConnectionPool{" +
                    "className='" + className + '\'' +
                    ", url='" + url + '\'' +
                    ", username='" + username + '\'' +
                    ", password='" + password + '\'' +
                    ", initSize='" + initSize + '\'' +
                    ", maxSize='" + maxSize + '\'' +
                    '}';
        }
    }

配置文件：

测试：

package com.spring.connection;
    
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    /**
     * @ClassName: test
     * @Description: TODO
     **/
    public class test {
        public static void main(String[] args) {
            ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("/applicationContext.xml");
            ConnectionPool bean = context.getBean(ConnectionPool.class);
            System.out.println(bean.getClassName());
            System.out.println(bean.getUrl());
            System.out.println(bean.getUsername());
            System.out.println(bean.getPassword());
            System.out.println(bean.getInitSize());
            System.out.println(bean.getMaxSize());
    
        }
    }

结果：

![20191016171341275.png][]

### 集合类型： ###

代码 ：

package com.spring.collection;
    
    import java.util.List;
    import java.util.Map;
    import java.util.Properties;
    import java.util.Set;
    
    /**
     *
     * @ClassName: Collection
     * @Description: TODO
     **/
    public class Collection {
    
        private List<String> list;
        private Set<String> set;
        private Map<String,String> map;
        private Properties prop;
    
        public Collection() {
        }
    
        public Collection(List<String> list, Set<String> set, Map<String, String> map, Properties prop) {
            this.list = list;
            this.set = set;
            this.map = map;
            this.prop = prop;
        }
    
        public List<String> getList() {
            return list;
        }
    
        public void setList(List<String> list) {
            this.list = list;
        }
    
        public Set<String> getSet() {
            return set;
        }
    
        public void setSet(Set<String> set) {
            this.set = set;
        }
    
        public Map<String, String> getMap() {
            return map;
        }
    
        public void setMap(Map<String, String> map) {
            this.map = map;
        }
    
        public Properties getProp() {
            return prop;
        }
    
        public void setProp(Properties prop) {
            this.prop = prop;
        }
    
        @Override
        public String toString() {
            return "Collection{" +
                    "list=" + list +
                    ", set=" + set +
                    ", map=" + map +
                    ", prop=" + prop +
                    '}';
        }
    }

配置文件：

<?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">
    
        
        <bean id="collection" class="com.spring.collection.Collection">
            
            <property name="list">
                <list>
                    <value>hello list1</value>
                    <value>hello list2</value>
                    <value>hello list3</value>
                </list>
            </property>
            
            <property name="set">
                <set>
                    <value>set1</value>
                    <value>set2</value>
                    <value>set3</value>
                </set>
            </property>
            
            <property name="map">
                <map>
                    <entry key="1" value="aa"></entry>
                    <entry key="2" value="bb"></entry>
                    <entry key="3" value="cc"></entry>
                </map>
            </property>
            <property name="prop">
                <props>
                    <prop key="pp">qq</prop>
                </props>
            </property>
        </bean>
    </beans>

测试：

package com.spring.collection;
    
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    import java.util.List;
    import java.util.Map;
    import java.util.Properties;
    import java.util.Set;
    
    /**
     * @ClassName: test
     * @Description: TODO
     **/
    public class test {
        public static void main(String[] args) {
            ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("/applicationContext.xml");
            Collection bean = context.getBean(Collection.class);
            List<String> list = bean.getList();
            for(String ele : list){
                System.out.println(ele);
            }
    
            Set<String> set = bean.getSet();
            for(String ele : set){
                System.out.println(ele);
            }
    
            Map<String, String> map = bean.getMap();
            Set<String> keySet = map.keySet();
            for(String key : keySet){
                System.out.println(map.get(key));
            }
    
            Properties prop = bean.getProp();
            System.out.println(prop.getProperty("pp"));
    
    
        }
    }

结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9odWFuZ2hhaXRhby5ibG9nLmNzZG4ubmV0_size_16_color_FFFFFF_t_70][]

[20191016171341275.png]: /images/20230531/a28501dae44342d1ba070fead2d5fa67.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9odWFuZ2hhaXRhby5ibG9nLmNzZG4ubmV0_size_16_color_FFFFFF_t_70]: /images/20230531/f158897a62ba4f79882863d04d08b651.png