重写spring读取配置文件，读取加密配置文件

[Java]代码    

package com.templet.spring;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Properties;

import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
import org.springframework.core.io.Resource;
import org.springframework.util.DefaultPropertiesPersister;
import org.springframework.util.PropertiesPersister;

public class DecryptPropertyPlaceholderConfigurer extends PropertyPlaceholderConfigurer {
	private Resource[] locations;

	public void setLocations(Resource[] locations) {
		this.locations = locations;
	}

	public void loadProperties(Properties props) throws IOException {
		if (this.locations != null) {
			PropertiesPersister propertiesPersister = new DefaultPropertiesPersister();
			for (int i = 0; i < this.locations.length; i++) {
				Resource location = this.locations[i];
				if (logger.isInfoEnabled()) {
					logger.info("Loading properties file from " + location);
				}
				InputStream is = null;
				try {
					is = location.getInputStream();
					BufferedReader in = new BufferedReader(new InputStreamReader(is, "UTF-8"));
					StringBuffer buffer = new StringBuffer();
					String line = "";
					while ((line = in.readLine()) != null) {
						buffer.append(line);
					}
					String rs="";
					if("dbconn.properties".equals(location.getFilename())){
						DESUtil des = new DESUtil("1234567");
						rs=des.decryptStr(buffer.toString());
					}else{
						rs =buffer.toString();
					}
					propertiesPersister.load(props, new ByteArrayInputStream(rs.getBytes()));
				} finally {
					if (is != null) {
						is.close();
					}
				}
			}
		}
	}
}

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