69 lines
2.0 KiB
Java
69 lines
2.0 KiB
Java
package com.xiang.common.utils;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.util.Base64;
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/**
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* @Author: xiang
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* @Date: 2026-05-08 08:56
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*/
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public class ImageUtils {
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/**
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* 将 Base64 图片写入文件
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* @param base64String Base64 编码的图片字符串
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* @param outputPath 输出文件路径
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*/
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public static void saveBase64Image(String base64String, String outputPath) {
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try {
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// 处理可能包含前缀的 Base64（如 data:image/png;base64,）
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String base64Data = extractBase64Data(base64String);
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// 解码 Base64
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byte[] imageBytes = Base64.getDecoder().decode(base64Data);
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// 写入文件
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try (FileOutputStream fos = new FileOutputStream(outputPath)) {
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fos.write(imageBytes);
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}
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System.out.println("图片已保存至: " + outputPath);
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} catch (IllegalArgumentException e) {
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System.err.println("Base64 解码失败: " + e.getMessage());
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} catch (IOException e) {
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System.err.println("文件写入失败: " + e.getMessage());
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}
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}
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/**
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* 提取纯 Base64 数据（去除前缀）
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*/
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private static String extractBase64Data(String base64String) {
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if (base64String == null || base64String.isEmpty()) {
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throw new IllegalArgumentException("Base64 字符串不能为空");
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}
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// 检查是否包含 data:image/xxx;base64, 前缀
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if (base64String.contains(",")) {
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return base64String.split(",", 2)[1];
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}
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return base64String;
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}
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/**
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* 从 Base64 字符串中获取图片类型
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*/
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public static String getImageType(String base64String) {
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if (base64String.startsWith("data:image/")) {
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String type = base64String.substring(11, base64String.indexOf(";"));
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return type; // 返回 png, jpeg, gif 等
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}
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return "png"; // 默认类型
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}
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public static void main(String[] args) {
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}
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}
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