1 ,service 层代码实现
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integer start = (pagenum - 1) * pagesize; integer end = pagesize; list<entity> entitylist; //调用mapper查询数据库 entitylist = entitypomapper.query(start, end); simplepageinfo simplepageinfo = simplepageinfo.of(entitylist ); simplepageinfo.setnumber(pagenum); simplepageinfo.setpagesize(pagesize);// 查询出来数据等于size,总数据量加一，页数加一 if (entitylist .size() == pagesize) { integer totalelements = (pagenum * pagesize) + 1; integer pages = pagenum + 1; simplepageinfo.settotalelements(totalelements); simplepageinfo.setpages(pages); } else { //数据不够size integer totalelements = ((pagenum - 1) * pagesize + entitylist .size()); integer pages = pagenum; simplepageinfo.settotalelements(totalelements); simplepageinfo.setpages(pages); } return simplepageinfo;} |
2,mapper
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<select .............> select.. from ... where ... limit #{start}, #{end} </select> |
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