摘要： 主要讨论了门户技术在Java 中的实现，描述了当前有关protal 的相关概念和基本实现技术，分析了这种实现的优缺点和存在的性能问题。在该基础上，提出了一种改进性能的方案，并通过测试、验证了方案的有效性，使不同的portal 实例间能更好地共享信息，提高各实例间的动态负载均衡能力和容错能力。

关键词: 门户；性能；负载均衡

Abstract: This paper discusses the portal implementation in Java, describes the related concept of portal in detail and the basic implementation technology, analyzes it’s advantages and disadvantages, puts forward the performance problem in the implementation. Based upon this, an improvement in the implementation is put forward and validated through test. This paper makes many concrete examples of portal share information,improves their capacity of load balancing and correction

Key words: Portal; Performance; Load balancing