HashSet set = new HashSet(); if(null!=goodsDtlList){ for(GoodsRecordDtl grd : goodsDtlList){ if(set.contains(grd.getMaterialNo())==true){ System.out.println("materialNo字段有相同的,记录重复!"); return SUCCESS; }else{ set.add(grd.getMaterialNo()); } } }
原文:http://blog.csdn.net/xlb744868186/article/details/44034503