如何给文件重命名

 public void fileRename(String tmpFilePath){
        String[] fileType = fileName2.split("\\.");
        File file = new File(tmpFilePath+"\\"+fileName2);
        if (file.exists()){
            String newFileName = fileType[0]+"-"+id2+"."+fileType[fileType.length-1];
            file.renameTo(new File(tmpFilePath+"\\"+newFileName));
            href = href+id2+"/media";
            HttpPostWithJson(href, JSON.toJSONString("http://192.168.6.174:8889/ProjectFiles/UploadFile/"+newFileName));
            File file1 = new File("D:\\IdeaProjects\\toolupload\\log\\confFile\\"+fileName2+".conf");
            file1.delete();
        }

    }

关键为renameTo方法