spring自定义属性编辑器CustomEditorConfig

canal源码中自定义了SocketAddressEditor，用于解析private InetSocketAddress address属性 因为配置文件只能配置string类型的字符串 你要将其直接转成对应的实体类肯定会报错。我们可以根据自己的需求自定义解析类
看下SocketAddressEditor是怎么写的

public class SocketAddressEditor extends PropertyEditorSupport implements PropertyEditorRegistrar {

    public void registerCustomEditors(PropertyEditorRegistry registry) {
        registry.registerCustomEditor(InetSocketAddress.class, this);
    }

    public void setAsText(String text) throws IllegalArgumentException {
        String[] addresses = StringUtils.split(text, ":");
        if (addresses.length > 0) {
            if (addresses.length != 2) {
                throw new RuntimeException("address[" + text + "] is illegal, eg.127.0.0.1:3306");
            } else {
                setValue(new InetSocketAddress(addresses[0], Integer.valueOf(addresses[1])));
            }
        } else {
            setValue(null);
        }
    }
}

首先继承 PropertyEditorSupport 类覆写方法setAsText() 然后实现接口PropertyEditorRegistrar 的registerCustomEditors方法。该方法是将自定义属性编辑器注册到spring中。然后配置xml

<bean id="socketAddressEditor" class="com.alibaba.otter.canal.instance.spring.support.SocketAddressEditor" />
<bean class="org.springframework.beans.factory.config.CustomEditorConfigurer"> 
        <property name="propertyEditorRegistrars">
            <list>
                <ref bean="socketAddressEditor" />
            </list>
        </property>
    </bean>

canal就是这么做的。其实还有另一种方式就是配置到xml文件中
例如

<bean class="org.springframework.beans.factory.config.CustomEditorConfigurer">  
<property name="customEditors">  
    <map>  
        <entry key="java.net.InetSocketAddress">  
            <bean class="com.alibaba.otter.canal.instance.spring.support.SocketAddressEditor">  
            </bean>  
        </entry>  
    </map>  
</property>