smartUpload上传问题（图片质量变差）

发布于 2021-11-20 16:26:53 字数 3561 浏览 837 评论 7

选择上传后在tomcat里分辨率就变低了……

String userWebAppPath = getWebAppPath();
/** 检查是否有图片上传文件夹 */
checkImageDir(userWebAppPath);

/** 图片上传的相对路径 */
String imgUploadPath = null;
String imgWebAppPath = null;
/** 图片后缀 */
String imgFileExt = null;

/** 图片名称:以当前日期 */
SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddhhmmss");
String imgFileId = formatter.format(new Date());

// 图片初始化高度与宽度
String width = null;
String height = null;

int imgWidth = 0;
int imgHeight = 0;

try {

com.jspsmart.upload.SmartUpload smartUpload = new com.jspsmart.upload.SmartUpload();
smartUpload.initialize(getServletConfig(), request, response);
smartUpload.upload();
com.jspsmart.upload.Request rqest = smartUpload.getRequest();

// 指定图片宽度和高度
width = rqest.getParameter("width");
if (null == width) {
width = "700";
}
height = rqest.getParameter("height");
if (null == height) {
height = "600";
}

imgWidth = Integer.parseInt(width);
imgHeight = Integer.parseInt(height);

// 文件个数
int fileCounts = smartUpload.getFiles().getCount();

for (int i = 0; i < fileCounts; i++) {
com.jspsmart.upload.File myFile = smartUpload.getFiles()
.getFile(i);

if (!myFile.isMissing()) {

imgFileExt = myFile.getFileExt();
// 组装图片真实名称
imgFileId += i + System.currentTimeMillis() + "."
+ imgFileExt;

// 图片生成路径
imgWebAppPath = userWebAppPath + imgFileId;

// 生成图片文件
myFile.saveAs(imgWebAppPath);
// 图片的相对路径
imgUploadPath = IMGROOT + imgFileId;

// 检查图片大小
BufferedImage src = ImageIO.read(new File(imgWebAppPath)); // 读入文件

int imgSrcWidth = src.getWidth(); // 得到源图宽
int imgSrcHeight = src.getHeight(); // 得到源图长

// 重新指定大小
if (imgSrcWidth <= 600 && imgSrcHeight <= 400) {
imgWidth = imgSrcWidth;
imgHeight = imgSrcHeight;
break;
} else {
if (imgWidth > 600) {
imgWidth = (int) Math
.round(imgSrcWidth
* (1.0 - ((double) (imgSrcWidth - 600) / (double) imgSrcWidth)));
imgHeight = (int) Math
.round(imgSrcHeight
* (1.0 - ((double) (imgSrcWidth - 600) / (double) imgSrcWidth)));
}
if (imgHeight > 400) {
imgWidth = (int) Math
.round(imgSrcWidth
* (1.0 - ((double) (imgSrcHeight - 400) / (double) imgSrcHeight)));
imgHeight = (int) Math
.round(imgSrcHeight
* (1.0 - ((double) (imgSrcHeight - 400) / (double) imgSrcHeight)));
}
}

// 按照图片的设置大小生成
ImageCut.scale(imgWebAppPath, imgWebAppPath, imgWidth,
imgHeight);
File f = new File(imgWebAppPath);
if (f.exists()) {
System.out.println("创建" + imgWidth + "*" + imgHeight
+ "图片成功");
}
}

}

} catch (Exception ex) {
ex.printStackTrace();
}

String path = "/imgcrop.jsp?tag=0&oldImgPath=" + imgUploadPath
+ "&imgFileExt=" + imgFileExt + "&imgRoot=" + IMGROOT
+ "&width=" + imgWidth + "&height=" + imgHeight;
System.out.println("path: " + path);
request.getRequestDispatcher(path).forward(request, response);