一个很完整使用jsp编写写的搜索模块，包含普通搜索、联合搜索、再次搜索、搜索引擎等，包含完整的数据库，数据库是MMSQL，里面有完整的说明。-A very complete search using jsp prepared to write the module, including general search, federated search, re-search, search engines, including a complete database, the database i