通过jdk比较器Lambda表达式实现分组同时排序
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通过jdk比较器Lambda表达式实现分组同时排序
通过 jdk比较器 Lambda表达式实现分组同时排序
排序不通过数据库查询，通过jdk比较器Lambda表达式实现，效果如下：
//页面page对象 Pagination pagination = manager.getPage(queryType,cpn(pageNo), CookieUtils .getPageSize(request)); //crit.setProjection(Projections.groupProperty("parentId")); List<CmsDictionary> ls = (List<CmsDictionary>) pagination.getList(); /* jdk1.8前 Collections.sort(ls, new Comparator<CmsDictionary>() { @Override public int compare(CmsDictionary o1, CmsDictionary o2) { if(o1.getParentId().compareTo(o2.getParentId()) == 0) { return o1.getPriority().compareTo(o2.getPriority()); }else { return o1.getParentId().compareTo(o2.getParentId()); } } }); jdk1.8 ls.sort(new Comparator<CmsDictionary>() { @Override public int compare(CmsDictionary o1, CmsDictionary o2) { if(o1.getParentId().compareTo(o2.getParentId()) == 0) { return o1.getPriority().compareTo(o2.getPriority()); }else { return o1.getParentId().compareTo(o2.getParentId()); } } }); */ //jdk1.8 Lambda表达式 ls.sort(Comparator.comparing(CmsDictionary::getParentId).thenComparing(CmsDictionary::getPriority)); //排好序后再放入页面对象 pagination.setList(ls);
Βιβλιοθήκη Baidu
通过 jdk比较器 Lambda表达式实现分组同时排序
排序不通过数据库查询，通过jdk比较器Lambda表达式实现，效果如下：
//页面page对象 Pagination pagination = manager.getPage(queryType,cpn(pageNo), CookieUtils .getPageSize(request)); //crit.setProjection(Projections.groupProperty("parentId")); List<CmsDictionary> ls = (List<CmsDictionary>) pagination.getList(); /* jdk1.8前 Collections.sort(ls, new Comparator<CmsDictionary>() { @Override public int compare(CmsDictionary o1, CmsDictionary o2) { if(o1.getParentId().compareTo(o2.getParentId()) == 0) { return o1.getPriority().compareTo(o2.getPriority()); }else { return o1.getParentId().compareTo(o2.getParentId()); } } }); jdk1.8 ls.sort(new Comparator<CmsDictionary>() { @Override public int compare(CmsDictionary o1, CmsDictionary o2) { if(o1.getParentId().compareTo(o2.getParentId()) == 0) { return o1.getPriority().compareTo(o2.getPriority()); }else { return o1.getParentId().compareTo(o2.getParentId()); } } }); */ //jdk1.8 Lambda表达式 ls.sort(Comparator.comparing(CmsDictionary::getParentId).thenComparing(CmsDictionary::getPriority)); //排好序后再放入页面对象 pagination.setList(ls);
Βιβλιοθήκη Baidu