使用Spring PropertyPlaceholderConfigurer 配置中文出现乱码的解决方法

在使用org.springframework.beans.factory.config.PropertyPlaceholderConfigurer 读取配置文件时，发现对于中文的处理会出现乱码现象，比如有如下的配置项及其内容：

jdbc.url=jdbc:mysql://192.168.0.89:3306/pcms-山东农信?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&failOverReadOnly=false

采用如下的配置方式：

<bean id="propertyConfigurer"
          class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:config/property/jdbc.properties</value>
                <value>classpath:config/property/baiduPush.properties</value>
            </list>
    </bean>

通过Spring获取到的配置项内容，中文变成了乱码。

通过了解类org.springframework.beans.factory.config.PropertyPlaceholderConfigurer的继承关系，发现父类org.springframework.core.io.support.PropertiesLoaderSupport中有这样的属性fileEncoding，这一属性的使用是在loadProperties方法中：

/**
     * Load properties into the given instance.
     * @param props the Properties instance to load into
     * @throws IOException in case of I/O errors
     * @see #setLocations
     */
    protected void loadProperties(Properties props) throws IOException {
        if (this.locations != null) {
            for (Resource location : this.locations) {
                if (logger.isInfoEnabled()) {
                    logger.info("Loading properties file from " + location);
                }
                try {
                    PropertiesLoaderUtils.fillProperties(
                            props, new EncodedResource(location, this.fileEncoding), this.propertiesPersister);
                }
                catch (IOException ex) {
                    if (this.ignoreResourceNotFound) {
                        if (logger.isWarnEnabled()) {
                            logger.warn("Could not load properties from " + location + ": " + ex.getMessage());
                        }
                    }
                    else {
                        throw ex;
                    }
                }
            }
        }
    }

通过添加fileEncoding=utf-8属性可以解决上述问题：

<bean id="propertyConfigurer"
          class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:config/property/jdbc.properties</value>
                <value>classpath:config/property/baiduPush.properties</value>
            </list>
        </property>
        <property name="fileEncoding">
            <value>utf-8</value>
        </property>
    </bean>