java实现切图并且判断图片是不是纯色/彩色图片

/**
   * 图片剪裁
   * @param x 距离左上角的x轴距离
   * @param y 距离左上角的y轴距离
   * @param width 宽度
   * @param height 高度
   * @param sourcePath 图片源
   * @param descpath 目标位置
   */
  publicstaticvoidimageCut(intx,inty,intwidth,intheight, String sourcePath, String descpath) {
    FileInputStream is =null;
    ImageInputStream iis =null;
    try{
      is =newFileInputStream(sourcePath);
      String fileSuffix = sourcePath.substring(sourcePath.lastIndexOf(".") +1);
      Iterator it = ImageIO.getImageReadersByFormatName(fileSuffix);
      ImageReader reader = it.next();
      iis = ImageIO.createImageInputStream(is);
      reader.setInput(iis,true);
      ImageReadParam param = reader.getDefaultReadParam();
      Rectangle rect =newRectangle(x, y, width, height);
      param.setSourceRegion(rect);
      BufferedImage bi = reader.read(0, param);
      ImageIO.write(bi, fileSuffix,newFile(descpath));
    }catch(Exception ex) {
      ex.printStackTrace();
    }finally{
      if(is !=null) {
        try{
          is.close();
        }catch(IOException e) {
          e.printStackTrace();
        }
        is =null;
      }
      if(iis !=null) {
        try{
          iis.close();
        }catch(IOException e) {
          e.printStackTrace();
        }
        iis =null;
      }
    }
  }

/**
   * 判断是否为纯色
   * @param imgPath 图片源
   * @param percent 纯色百分比，即大于此百分比为同一种颜色则判定为纯色,范围[0-1]
   * @return
   * @throws IOException
   */
  publicstaticbooleanisSimpleColorImg(String imgPath,floatpercent)throwsIOException{
    BufferedImage src=ImageIO.read(newFile(imgPath));
    intheight=src.getHeight();
    intwidth=src.getWidth();
    intcount=0,pixTemp=0,pixel=0;
    for(inti=0;i=percent)//如果连续相同的像素点大于设定的百分比的话，就判定为是纯色的图片
          returntrue;
        pixTemp=pixel;
      }
    }
    returnfalse;
  }