Java导出图片的相关内容

文章 2016-12-23 来自：开发者社区

JAVA使用POI导出海量数据附源码（支持图片）

实现思路简单来说就是用分页实现，每次从数据库查询部分数据，然后交给poi的SXSSFWorkbook，poi发现数超过自身设置的暂存区数量时会flush到磁盘文件。所以我们需要使用poi的这个特性来实现海量数据下载。以下3个步骤：从数据库中待导出数据的总行数总行数除以页数得到查询次数循环次数将数据依次查出到SXSSFWorkbook 从SXSSFWorkbook中导出Excel文...

文章 2016-05-11 来自：开发者社区

java swing 把JTextArea导出为图片

Java swing中如何把JTextArea 导出成为一张图片(jpg或png)呢? 核心方法: Java代码 /*** * convert JTextArea to image ...

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更新时间 2024-03-03 09:33:29

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