fenghenzr的博客

1、都是接口，可实现。2、都是用于比较、排序。3、待排序类实现comparable实现排序逻辑，排序逻辑不需要待排序对象本身实现。4、comparable通过o1.compareTo(Object o2)比较，o1>o2返回正整数，o1=o2返回0，o1o2返回正整数，o1=o2返回0，o1

1、pom多模块打包mvn -e clean install -Dmaven.test.skip=true -pl :${module} -am其中${module}替换为子模块的模块名。2、读取txt文件//按行读取存listpublic static List<String> read(){ ArrayList<String> arrayList = new ArrayList<>(); try { F

HttpClient使用发送POST请求携带参数 public String send(MailMsg mailMsg, List<FileInfoDTO> attachmentList) throws Exception{ JSONObject jsonObject=new JSONObject(); jsonObject.put("MailCC",StringUtils.join(ccList.toArray(),",")); jsonObject.put("MailTitle

java stream的使用–分组/finished是list，根据getSafetyPotentialRiskClass(),getProcessFlag()分类//filter用来过滤为空的情况Map<String, Map<String,Long>> map = finished .stream() .filter(e-> StringUtils.isNotBlank(e.getSafetyPotentialRiskClass())&

导出word文档，包含表格以及一个单元格插入多张图片controller@ApiOperation(value = "导出安全巡检单")@GetMapping(path = "/export",produces = {"application/octet-stream;charset=UTF-8"})public void exportExcel(HttpServletResponse response, String prjName, String prjId) throws IOExceptio

HttpClient使用发送POST请求携带参数 public String send(MailMsg mailMsg, List<FileInfoDTO> attachmentList) throws Exception{ JSONObject jsonObject=new JSONObject(); jsonObject.put("MailCC",StringUtils.join(ccList.toArray(),",")); jsonObject.put("MailTitle