最近遇见几人问这个问题,自己以后也肯能会遇见,主要是对spring读取的properties加密后的处理
1.继承实现PropertyPlaceholderConfigurer
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package com.zhangyz.www.spring;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
public class MinePropertyPlaceholderConfigurer extends
PropertyPlaceholderConfigurer {
private String encrypt = "after-encrypt:";
private static Logger logger = Logger
.getLogger(MinePropertyPlaceholderConfigurer.class.getName());
protected String convertPropertyValue(String originalValue) {
if (originalValue != null && originalValue.length() > encrypt.length()
&& originalValue.indexOf(encrypt) >= 0) {
return new String(hex2Byte(originalValue.substring(encrypt.length())));
} else {
return originalValue;
}
}
static final String HEXES = "0123456789ABCDEF";
public static String byte2Hex(byte[] bs) {
StringBuffer hex = new StringBuffer(2 * bs.length);
for (int i = 0; i < bs.length; i++) {
hex.append(HEXES.charAt((bs[i] & 0xF0) >> 4)).append(
HEXES.charAt((bs[i] & 0x0F)));
}
return hex.toString();
}
public static byte[] hex2Byte(String hex) {
if (hex.length() % 2 != 0) {
throw new RuntimeException("hex is error!");
}
byte[] bs = new byte[hex.length() / 2];
for (int i = 0; i < bs.length; i++) {
bs[i] = Byte.parseByte(hex.substring(i * 2, i * 2 +2), 16);
}
return bs;
}
public static void main(String[] args) {
String password = "myPassword";
System.out.println(byte2Hex(password.getBytes()));
System.out.println(new String(hex2Byte(byte2Hex(password.getBytes()))));
}
}
2.application.xml文件
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean name="" class="com.zhangyz.www.spring.MinePropertyPlaceholderConfigurer">
<property name="location">
<value>classpath:com/zhangyz/www/spring/jdbc.properties</value>
</property>
</bean>
<bean name="test" class="com.zhangyz.www.spring.Test">
<property name="userName" value="${test.userName}">
</property>
<property name="password" value="${test.password}">
</property>
</bean>
</beans>
3.properties文件
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test.userName=myUserName
test.password=after-encrypt:6D7950617373776F7264
4.测试类
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package com.zhangyz.www.spring;
import org.apache.log4j.Logger;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Test {
private String userName;
private String password;
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
private static Logger logger = Logger.getLogger(Test.class.getName());
/**
* @param args
*/
public static void main(String[] args) {
ApplicationContext applicationContext = new ClassPathXmlApplicationContext(
"/com/zhangyz/www/spring/application.xml");
Test test=(Test) applicationContext.getBean("test");
logger.error(test.getUserName());
logger.error(test.getPassword());
}
}
5.输出结果
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2011-11-30 10:06:22,921 ERROR [main - (Test.java:36) - com.zhangyz.www.spring.Test] myUserName
2011-11-30 10:06:22,921 ERROR [main - (Test.java:37) - com.zhangyz.www.spring.Test] myPassword