参考如下代码：
package com.wonders.cop.billing.util
import java.awt.AlphaComposite
import java.awt.Color
import java.awt.Font
import java.awt.Graphics2D
import java.awt.Image
import java.awt.RenderingHints
import java.awt.image.BufferedImage
import java.io.File
import java.io.FileOutputStream
import java.io.InputStream
import java.io.OutputStream
import java.util.HashMap
import java.util.Iterator
import java.util.Map
import javax.imageio.ImageIO
public class ImageMarkLogoUtil {
// 水印透明度
private static float alpha = 1f
// 水印横向位置
private static int positionWidth = 82
// 水印纵向位置
private static int positionHeight = 545
// 水印文字字体
private static Font font = new Font("宋体", Font.PLAIN, 13)
// 水印文字颜色
private static Color color = Color.black
public static void main(String[] args) {
String srcImgPath = "d:/888880002302900_web.jpg"
String targerTextPath = "d:/qie_text.jpg"
ImageMarkLogoUtil
.markImageByTexts(testValue(),
BillDetailImagePosition.getPosition("888880002302900"), srcImgPath,
targerTextPath)
}
public static Map testValue() {
Map<String, String>value = new HashMap<String, String>()
value.put("feedPrice", "15.1")
value.put("feedCount", "20")
value.put("nowNum", "124")
value.put("drainageCount", "55")
value.put("drainagePrice", "1.5")
value.put("feedCost", "66")
value.put("cost", "66")
value.put("drainageCost", "100")
value.put("barcode", "10101010101010101")
value.put("nextCopy", "2014-12-10")
value.put("waterType", "居民生活用水")
value.put("meterReader", "测试人员")
value.put("copyNumber", "741sg")
value.put("prevCarryOver", "0.25")
value.put("nowCarryOver", "2.12")
value.put("openDate", "20141002")
value.put("nextMonth", "201402 ")
value.put("remark", "您缴付的2013年03月30.80元水费,我公司已收到,谢谢!")
value.put("detailStatus", "00")
value.put("billStatus", "00")
value.put("prevMonth", "201406")
value.put("lastPayDate", "20140112")
value.put("companyName", "市北水")
value.put("type", "1")
value.put("amount", "58.1")
value.put("address", "浦秀路220弄10号101")
value.put("year","2014")
value.put("month", "04")
value.put("billId", "11111")
value.put("account", "38445450")
value.put("companyId", "888880002302900")
value.put("realName", "姚航")
return value
}
/**
* 给图片添加水印文字、可设置水印文字的旋转角度
*
* @param logoText
* @param srcImgPath
* @param targerPath
* @param degree
*/
public static void markImageByTexts(Map<String, String>value,
Map<String, String[]>position, String srcImgPath, String targerPath) {
InputStream is = null
OutputStream os = null
try {
// 1、源图片
Image srcImg = ImageIO.read(new File(srcImgPath))
BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),
srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB)
// 2、得到画笔对象
Iterator<String>positionIter = position.keySet().iterator()
String key = ""
String logotext = ""
String[] xy
while (positionIter.hasNext()) {
key = positionIter.next()
xy = position.get(key)
logotext = value.get(key)
System.out.println("key:"+key+",value:"+logotext)
if (xy != null &&xy.length == 2)
printText(srcImg, buffImg, logotext,
Integer.valueOf(xy[0]), Integer.valueOf(xy[1]))
}
// 10、生成图片
os = new FileOutputStream(targerPath)
ImageIO.write(buffImg, "JPG", os)
System.out.println("图片完成添加水印文字")
} catch (Exception e) {
e.printStackTrace()
} finally {
try {
if (null != is)
is.close()
} catch (Exception e) {
e.printStackTrace()
}
try {
if (null != os)
os.close()
} catch (Exception e) {
e.printStackTrace()
}
}
}
/**
* 在图片上打印文字
*
* @param srcImg
* @param buffImg
* @param logoText
* @return
*/
private static void printText(Image srcImg, BufferedImage buffImg,
String logoText, Integer positionX, Integer PositionY) {
Graphics2D g = buffImg.createGraphics()
// 3、设置对线段的锯齿状边缘处理
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR)
g.drawImage(
srcImg.getScaledInstance(srcImg.getWidth(null),
srcImg.getHeight(null), Image.SCALE_SMOOTH), 0, 0, null)
// 5、设置水印文字颜色
g.setColor(color)
// 6、设置水印文字Font
g.setFont(font)
// 7、设置水印文字透明度
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
alpha))
// 8、第一参数->设置的内容，后面两个参数->文字在图片上的坐标位置(x,y)
g.drawString(logoText, positionX, PositionY)
// 9、释放资源
g.dispose()
}
}
鉴于您的描述，很显然是在预览时资源（图片）获取失败。看了一下您的代码：<img id="img" src="<%=basePath%>dzxm/genDZXMImag.action" >既然使用的是java，为何不直接使用全局变量亦或是注入，都比这种方式优雅稳定。
