数据库blob图片文件，多图片打包下载

数据库存储blob图片文件，前端打包下载

数据库图片文件实体类

package com.cmrh.mspserver.pos.dto;

import java.io.Serializable;

import org.springframework.format.annotation.DateTimeFormat;

public class MspPosImage implements Serializable {

	private static final long serialVersionUID = -4668256147224146458L;

	/**
	 * 影像类型
	 */
	private String imageType;

	/**
	 * 影像内容
	 */
	private byte[] imageValue;

	/**
	 * 影像顺序
	 */
	private Integer sortNum;

    /**
     * 创建人       db_column: CREATED_USER
     */
	private java.lang.String createdUser;
    /**
     * 创建时间       db_column: CREATED_DATE
     */
	@DateTimeFormat(pattern="yyyy-MM-dd")
	private java.util.Date createdDate;
    /**
     * 更新人       db_column: UPDATED_USER
     */
	private java.lang.String updatedUser;
    /**
     * 更新时间       db_column: UPDATED_DATE
     */
	@DateTimeFormat(pattern="yyyy-MM-dd")
	private java.util.Date updatedDate;
    /**
     * 流水号       db_column: PK_SERIAL
     */
	private java.lang.String pkSerial;

	public String getImageType() {
		return imageType;
	}
	public void setImageType(String imageType) {
		this.imageType = imageType;
	}
	public byte[] getImageValue() {
		return imageValue;
	}
	public void setImageValue(byte[] imageValue) {
		this.imageValue = imageValue;
	}
	public java.lang.String getCreatedUser() {
		return createdUser;
	}
	public void setCreatedUser(java.lang.String createdUser) {
		this.createdUser = createdUser;
	}
	public java.util.Date getCreatedDate() {
		return createdDate;
	}
	public void setCreatedDate(java.util.Date createdDate) {
		this.createdDate = createdDate;
	}
	public java.lang.String getUpdatedUser() {
		return updatedUser;
	}
	public void setUpdatedUser(java.lang.String updatedUser) {
		this.updatedUser = updatedUser;
	}
	public java.util.Date getUpdatedDate() {
		return updatedDate;
	}
	public void setUpdatedDate(java.util.Date updatedDate) {
		this.updatedDate = updatedDate;
	}
	public java.lang.String getPkSerial() {
		return pkSerial;
	}
	public void setPkSerial(java.lang.String pkSerial) {
		this.pkSerial = pkSerial;
	}
	public Integer getSortNum() {
		return sortNum;
	}
	public void setSortNum(Integer sortNum) {
		this.sortNum = sortNum;
	}

}

　　下载sql

<!-- 获取影像信息 -->
	<select id="getMspPosImageList" parameterClass="java.util.List"
		resultClass="com.cmrh.mspserver.pos.dto.MspPosImage">
		SELECT mpi.PK_SERIAL pkSerial,mpi.IMAGE_TYPE imageType,mpi.IMAGE_VALUE imageValue,mpi.SORT_NUM sortNum
		FROM
		MSPDATA.MSP_POS_IMAGE mpi
		WHERE
		mpi.PK_SERIAL IN
		<iterate open="(" close=")" conjunction=",">
			#pkSerial[]#
		</iterate>
		 ORDER BY mpi.CREATED_DATE,mpi.SORT_NUM
	</select>

　　请求处理类

public void downloadImage(HttpServletResponse response, String imageIds) {
        ZipOutputStream zos = null;
        try {

            String nowTimeString = DateUtil.millis2String(System.currentTimeMillis());
            //文件的名称
            String downloadFilename = nowTimeString + ".zip";
            //转换中文否则可能会产生乱码
            downloadFilename = URLEncoder.encode(downloadFilename, "UTF-8");
            // 指明response的返回对象是文件流
            response.setContentType("application/octet-stream");
            // 设置在下载框默认显示的文件名
            response.setHeader("Content-Disposition", "attachment;filename=" + downloadFilename);
            zos = new ZipOutputStream(response.getOutputStream());
            if (StringUtils.isNotEmpty(imageIds)) {
                List<String> idList = Arrays.asList(imageIds.split(","));
                List<MspPosImage> images = debunkService.getMspPosImageList(idList);
                if (!CollectionUtils.isEmpty(images)) {
                    for (int i = 0; i < images.size(); i++) {
                        InputStream fis = CommonUtil.byte2Input(images.get(i).getImageValue());
                        zos.putNextEntry(new ZipEntry("第" + (i+1) + "张截图.jpg"));
                        byte[] buffer = new byte[1024];
                        int r = 0;
                        while ((r = fis.read(buffer)) != -1) {
                            zos.write(buffer, 0, r);
                        }
                        fis.close();
                    }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (zos != null) {
                try {
                    zos.flush();
                    zos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }