Zhang Huan is an author known mainly for writing books on programming and design. Public information about him is limited, and only two works can be confirmed, both in the areas of introductory Java technology and website development. Among them, Java Web Dynamic Website Development (Micro-Course Edition) addresses the complete process of dynamic website development, while Java Language Programming and Implementation (Micro-Course Edition) focuses on Java fundamentals and programming practice. Both books use the “micro-course edition” format, indicating that the writing values the operability of knowledge points and a manageable learning pace, and tends to break abstract concepts into runnable examples so readers can learn while practicing. Judging from the subject matter, Zhang Huan's content is close to the needs of university courses and vocational training, with plain language and clear structure, leaning toward practical textbooks rather than theoretical monographs. Although his personal background, positions, and writing career cannot yet be verified, these two works offer introductory readers a fairly concrete path into programming.