java RSA非对称密钥加密，自己建个java项目就好了，也可以当成工具类-java RSA asymmetric key encryption, to build their own like a java project, and also as tools

substitute the value, e.g. build the md5 by concat the strings together, then you can use the java.lang.String.format method. But in Camel 2.0 we have added two convenient methods in the Java DSL so you can do fromF and toF that uses String formattin