1. 承诺书pdf生产模块

feiyu02

2022-07-28 237d7c42498806a3ca205f63d151671a45304854

 src/main/kotlin/cn/flightfeather/supervision/infrastructure/utils/FileUtil.kt

@@ -1,10 +1,21 @@
package cn.flightfeather.supervision.infrastructure.utils

import net.coobird.thumbnailator.Thumbnails
import net.coobird.thumbnailator.tasks.io.FileImageSource
import org.springframework.util.Base64Utils
import java.awt.Image
import java.awt.image.BufferedImage
import java.io.ByteArrayInputStream
import java.io.ByteArrayOutputStream
import java.io.File
import java.io.FileOutputStream
import java.util.*
import javax.imageio.ImageIO


class FileUtil {
object FileUtil {
    private const val SCHEME_PNG = "data:image/png;base64,"

    @Throws(Exception::class)
    fun uploadFile(file: ByteArray, filePath: String, fileName: String) {
        val targetFile = File(filePath)
@@ -29,4 +40,22 @@
        }
        return ""
    }

    /**
     * 按照固定宽度压缩图片至base64形式
     */
    fun compressImage2(bytes: ByteArray, w: Int): String {
        val input = ByteArrayInputStream(bytes)
        val srcImg = ImageIO.read(input)
        val srcW = srcImg.width
        val scale = w.toFloat() / srcW
        val h = (srcImg.height * scale).toInt()

        val buffImg = BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB)
        buffImg.graphics.drawImage(srcImg.getScaledInstance(w, h, Image.SCALE_SMOOTH), 0, 0, null)
        val out = ByteArrayOutputStream()
        ImageIO.write(buffImg, "PNG", out)

        return SCHEME_PNG + Base64.getEncoder().encodeToString(out.toByteArray())
    }
}