排序列表 原生方法和comparator方法
1.通过原生,重写sort比较器
String通过ascii码值比较,小的在前,datetime通过时间比较,老的在前
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public void sortProjectTechnicianList(List projectTechnicianRows) { projectTechnicianRows.sort((o1, o2) -> { int cmp = o1.getCustomerName().compareTo(o2.getCustomerName()); if (cmp == 0) { cmp = o1.getProjectName().compareTo(o2.getProjectName()); if (cmp == 0) { cmp = o1.getBelongCompany().compareTo(o2.getBelongCompany()); if (cmp == 0) { cmp = o1.getTechnicianId().compareTo(o2.getTechnicianId()); if (cmp == 0) { cmp = o1.getCreateTime().compareTo(o2.getCreateTime()); } } } } return cmp; }); }
2.Comparator比较器,简单地通过项目名称进行排序
basicProjectEntities.sort(Comparator.comparing(BasicProjectEntity::getProjectName));
它的老版本写法是
Collections.sort(basicProjectEntities, new Comparator() { @Override public int compare(BasicProjectEntity p1, BasicProjectEntity p2) { return p1.getProjectName().compareTo(p2.getProjectName()); } });
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