对于文字水印真实文本的width,height
public int getTextLength(String text)
{
int length=text.length();
for(int i=0;i<=length;i++)
{
String s=String.valueOf(text.charAt(i));
if(s.getBytes().length>1) length++;
}
length=length%2==0?length/2:length/2+1;
return lengthl
}

多个水印：
// 6、水印图片的位置
for (int height = interval + imgIcon.getIconHeight(); height < buffImg
.getHeight(); height = height +interval+ imgIcon.getIconHeight()) {
for (int weight = interval + imgIcon.getIconWidth(); weight < buffImg
.getWidth(); weight = weight +interval+ imgIcon.getIconWidth()) {
g.drawImage(img, weight - imgIcon.getIconWidth(), height

• imgIcon.getIconHeight(), null);
  }
  }

给批量图片添加水印
多图片上传成功之后将路径存到数组 遍历数组进行水印添加