What abilities do Java interns need to work?

Let me give you a brief analysis of the skills requirements of job seekers.

Macro aspect

1) Be proficient in various open source technologies and have studied the source code of struts spring;

2) Rich project experience, followed up several major projects from beginning to end, from demand investigation to online delivery and maintenance stage;

3) Have experience in the architecture and development of distributed systems, and have rich experience in cross-system structure optimization and data storage performance indicators.

Microscopic aspect

1) Proficient in using Java language for object-oriented programming, with good programming habits, familiar with commonly used Java API, including assembly framework, multithreading (concurrent programming), I/O(NIO), Socket, JDBC, XML, reflection, etc.

2) Familiar with Java Web development based on JSP and Servlet, deeply understand the working principle and life cycle of Servlet and JSP, and skillfully use JSTL and EL to write scriptless dynamic pages;

3) Proficient in using HTML, CSS and JavaScript for Web front-end development, familiar with jQuery and Bootstrap, and deeply understand the application of Ajax technology in Web projects;

4) Proficient in using ORM frameworks such as Hibernate and MyBatis, familiar with the core APIs of Hibernate and MyBatis, and have a deep understanding of Hibernate's association mapping, inheritance mapping, component mapping, caching mechanism, transaction management and performance tuning.