由于使用post提交的数据也可以通过工具拦截到明文数据，所以很多时候需要在前台用js加密后端代码解密。由于本人也在项目中使用到这个，现在做了一个例子是java版本的，希望对大家有用。-Due to the use of the post submit data can also intercept to plaintext data through the tool, so a lot of time need to encrypt the back-end code decryption using JS at the front desk. Because I also used in the project to this, now made an example is the Java version, I hope useful for everyone.