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java batch download, package multiple files into zip format to download What we need now: Download the pic package under the product family and product type according to the product family and product type; pic package is a zip file; Table: These packages exist in another table as blob s: T? Imagefile table: Now what we need to do is ...

Solve the problem of cross domain access of spring MVC web project 1. Cross origin cross domain annotation springboot has its own cross domain annotation, which can be placed on the RestController's class or method. It can also customize those domain names, which can be cross domain and very flexible @CrossOrigin / / by default @ CrossOrigin a ...

< center > mybatis reverse engineering < / center > ​ The purpose of reverse engineering is to reduce our development time. The so-called Mybatis reverse engineering is that Mybatis will automatically generate pojo, mapper and mapper.xml according to the data table we have designed. The next step is the project construction proces ...

Reference article: apache Impala detailed installation (lying in the most complete pit) Apache impala detailed installation impala is an efficient sql query tool provided by cloudera, which provides real-time query results. The official test performance is 10 to 100 times faster than hive, and its sql query is even faster than spark sql. imp ...

1, Source code description Freecplus is a C/C + + open source framework under Linux system. Please go to the C language technology network (www.freecplus.net) to download the source code. This paper introduces the parsing of string function in xml format with freecplus framework. The declaration file for functions and classes is freecplus / 65 ...

Preface Creation mode: Singleton mode, factory mode, builder mode, prototype mode Structural type: bridge mode, agent mode, decorator mode, adapter mode, facade mode, combination mode, enjoyment mode Behavioral: observer mode, template mode, strategy mode, responsibility chain mode, state mode, iterator mode, visitor mode introduce In our wor ...

Gin Web Framework brief introduction web framework developed based on httprouter: https://github.com/gin-gonic/gin Provides Martini style API, but 40 times faster than Martini Very lightweight, simple to use Installation and use of Gin framework Install: go get -u github.com/gin-gonic/gin Basic use import "github.com/gin-gonic/gin" func ...

For security reasons, you may need to protect the entire workbook or worksheet. Sometimes, you may even need to protect a worksheet, but keep the specified cells for editing. This article describes how to use free fire.xls for Java to implement these operations.   Add Spire.Xls.jar as a dependency Method 1: Download Free Spire.XLS for Java Pack ...

Performance test of 1/ Log4j2 It is not difficult to see from the figure that the performance is the best when the number of online processes is between 2 and 16, and synchronous and asynchronous logger s are used to print logs. 2/ target Mixed sync/async Color log Classification output to different files Automatically compress and archive lo ...

Advanced Date and time import datetime import time # Introduce time Modular import calendar #Get current date time now=datetime.datetime.now() print(now) #Get the specified date d=datetime.datetime(2019,10,1,12,23,40) print(d) #Date to string d2=d.strftime("%Y/%m/%d %H:%M:%S") print(d2) #String to date s="2020-8-15 2:30:20" d3=datetime.da ...