spring加载property文件

た入场券 2022-08-27 13:57 255阅读 0赞

以jdbc.properties为例

1.通过spring配置jdbc.propertes

<description>property文件加载配置</description>
    
    	
    	
    	 
             
    	
    	
    	<bean
    		class="com.silvery.core.spring.jdbc.EncryptablePropertyPlaceholderConfigurer">
    		<property name="locations">
    			<list>
    				
    				<value>classpath:property/jdbc.properties</value>
    			</list>
    		</property>
    		
    		<property name="fields">
    			<array>
    				<value>default.jdbcUrl</value>
    				<value>default.user</value>
    				<value>default.password</value>
    			</array>
    		</property>
    	</bean>

2.EncryptablePropertyPlaceholderConfigurer是自己定义的类，通过重写PropertyPlaceholderConfigurer的processProperties加载器方法，实现解密并重新设置属性值，做到偷梁换柱，在真正使用配置之前完成解密。

package com.silvery.core.spring.jdbc;
    
    import java.util.Properties;
    
    import org.springframework.beans.BeansException;
    import org.springframework.beans.factory.BeanInitializationException;
    import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
    import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
    
    import com.silvery.security.encrypt.impl.DESEncoder;
    
    /**
     * 重写PropertyPlaceholderConfigurer的processProperties方法
     * 
     * @author shadow
     *
     */
    
    public class EncryptablePropertyPlaceholderConfigurer extends PropertyPlaceholderConfigurer {
    
    	private String[] fields;
    
    	protected void processProperties(ConfigurableListableBeanFactory beanFactory, Properties props)
    			throws BeansException {
    		try {
    			Properties new_props = props;
    			for (String field : fields) {
    				Object obj = props.getProperty(field);
    				if (obj != null && obj.toString().length() > 0) {
    					// 解密属性值，并重新设置
    					new_props.put(field, DESEncoder.decrypt(obj.toString(), DESEncoder.DEFAULT_KEY));
    				}
    			}
    			super.processProperties(beanFactory, new_props);
    		} catch (Exception e) {
    			throw new BeanInitializationException(e.getMessage());
    		}
    	}
    
    	public String[] getFields() {
    		return fields;
    	}
    
    	public void setFields(String[] fields) {
    		this.fields = fields;
    	}
    
    }

3.jdbc的配置文件（部分）

# ======================= 数据库配置信息 ==========================
    # 驱动类型
    default.driverClass = com.mysql.jdbc.Driver
    # 数据库路径 jdbc:mysql://127.0.0.1:3306/lchyy
    default.jdbcUrl = TQrbIZK42ebirgavLn0SBs3jxC835zYy2CeCt9Cq09/dj1J7plBmMQ==
    # 账号 root
    default.user = ATXpuutonSc=
    # 密码 hjj
    default.password = Wd9Hd22f404=