关于Spring properties –> Map 注入到bean中

Spring properties to map

一个key-value形式的properties文件 以Map的形式注入到Spring的bean中

properties文件形式

RF09001=fooService#method1#name,phone

spring 配置

    <bean id="noMethodMap" class="org.springframework.beans.factory.config.PropertiesFactoryBean">         <property name="location" value="classpath:foo.properties"/>     </bean>

注入到Bean中

    @Resource(name="noMethodMap")     private Map<String, String> noMethodMap;

其他

如何定位注入源码

修改为一个不存在的资源名称

@Resource(name="nonexist")

此时启动会报错

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'nonexist' available     at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:687)     at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1207)     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:284)     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)     at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.autowireResource(CommonAnnotationBeanPostProcessor.java:522)

可知是在哪里注入的了

在哪里将PropertiesFactoryBean转成Map

同样的处理方式 将注入变量修改成一个错误的类型 查看错误信息即可

private String noMethodMap; // map --> String

启动会报错

Caused by: org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'noMethodMap' is expected to be of type 'java.lang.String' but was actually of type 'java.util.Properties'     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:378)

就知道是在哪里进行类型转换的了

如果想对properties-->Map做一下自定义的处理呢

如RF09001-RF09010对应的都是同一个value

RF09001-RF09003=fooService#method1#name,phone

但是想Map中的实际形式为

RF09001=fooService#method1#name,phone RF09002=fooService#method1#name,phone RF09003=fooService#method1#name,phone

继承PropertiesFactoryBean 覆盖createProperties即可

public class MyPropertiesFactoryBean extends PropertiesFactoryBean{     @Override     protected Properties createProperties() throws IOException {         Properties properties = super.createProperties();         Enumeration<String> propertyNames = (Enumeration<String>) properties.propertyNames();         while(propertyNames.hasMoreElements()){             String name = propertyNames.nextElement();             if(name.matches("\w+-\w+")){                 String rawName = name;                 String[] split = rawName.split("-");                 Integer start = Integer.valueOf(split[0].substring(2));                 Integer end = Integer.valueOf(split[1].substring(2));                 for (int i = start; i <= end; i++) {                     properties.setProperty("RF" + i, properties.getProperty(rawName));                 }             }         }         return properties;     }

spring配置改成

<bean id="noMethodMap" class="com.foo.app.util.MyPropertiesFactoryBean">

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