15、【商品管理模块开发】——后台获取商品详情功能开发及PropertiesUtil配置工具，DateTimeUtil时间处理工具开发...

1、后台获取商品详情接口：

在上一篇文章所新建的ProudctManageController类中新建下面方法：
*Controller:

//获取商品详情接口@RequestMapping("get_detail.do")@ResponseBodypublic ServerResponse getDetail(HttpSession session, Integer productId){User user=(User) session.getAttribute(Const.CURRENT_USER);if(user==null){return ServerResponse.createByErrorCodeMessage(ResponseCode.NEED_LOGIN.getCode(),"未登录，请先登录");}if(iUserService.checkAdminRole(user).isSuccess()){//增加商品的逻辑方法return iProductService.manageProductDetail(productId);}else {return ServerResponse.createByErrorMessage("当前登录者不是管理员，无权限操作");}}

*Service:

    //查询商品的详细信息ServerResponse<ProductDetailVo> manageProductDetail(Integer productId);

*ServiceImpl:

//查询商品的详细信息public ServerResponse<ProductDetailVo> manageProductDetail(Integer productId){if(productId==null){return ServerResponse.createByErrorCodeMessage(ResponseCode.ILLEGAL_ARGUMENT.getCode(),ResponseCode.ILLEGAL_ARGUMENT.getDesc());}Product product=productMapper.selectByPrimaryKey(productId);if(product==null){return ServerResponse.createByErrorMessage("商品已下架或者删除");}ProductDetailVo productDetailVo=assembleProductDetailVo(product);return  ServerResponse.createBySuccess(productDetailVo);}

其中用到了selectByPrimaryKey和assembleProductDetailVo这两个方法，其中selectByPrimaryKey是使用Mybaties逆向工程生产的方法，根据productId来查询Product的信息。
下面介绍下assembleProductDetailVo这个方法
这个方法是自己封装的，用户返回给前端一个商品详情类，那么为什么要用到这个封装类呢？因为我们返回给前端的不仅仅是一个数据表里面的信息，我们返回的多个表综合的信息。所以使用的是多表查询，我们自己封装了一个ProductDetailVo类，来定义我们需要返回给前端定义的字段。

新建ProductDetailVo类

image.png

ProductDetailVo内容如下：

package com.mmall.vo;import java.math.BigDecimal;public class ProductDetailVo {private Integer id;private Integer categoryId;private String name;private String subtitle;private String mainImage;private String subImages;private String detail;private BigDecimal price;private Integer stock;private Integer status;private String createTime;private String updateTime;private String imageHost;private Integer parentCategoryId;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public Integer getCategoryId() {return categoryId;}public void setCategoryId(Integer categoryId) {this.categoryId = categoryId;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getSubtitle() {return subtitle;}public void setSubtitle(String subtitle) {this.subtitle = subtitle;}public String getMainImage() {return mainImage;}public void setMainImage(String mainImage) {this.mainImage = mainImage;}public String getSubImages() {return subImages;}public void setSubImages(String subImages) {this.subImages = subImages;}public String getDetail() {return detail;}public void setDetail(String detail) {this.detail = detail;}public BigDecimal getPrice() {return price;}public void setPrice(BigDecimal price) {this.price = price;}public Integer getStock() {return stock;}public void setStock(Integer stock) {this.stock = stock;}public Integer getStatus() {return status;}public void setStatus(Integer status) {this.status = status;}public String getCreateTime() {return createTime;}public void setCreateTime(String createTime) {this.createTime = createTime;}public String getUpdateTime() {return updateTime;}public void setUpdateTime(String updateTime) {this.updateTime = updateTime;}public String getImageHost() {return imageHost;}public void setImageHost(String imageHost) {this.imageHost = imageHost;}public Integer getParentCategoryId() {return parentCategoryId;}public void setParentCategoryId(Integer parentCategoryId) {this.parentCategoryId = parentCategoryId;}
}

assembleProductDetailVo:封装的方法

 //对返回的商品详细信息进行封装private ProductDetailVo assembleProductDetailVo(Product product){ProductDetailVo productDetailVo=new ProductDetailVo();productDetailVo.setId(product.getId());productDetailVo.setSubtitle(product.getSubtitle());productDetailVo.setPrice(product.getPrice());productDetailVo.setMainImage(product.getMainImage());productDetailVo.setSubImages(product.getSubImages());productDetailVo.setCategoryId(product.getCategoryId());productDetailVo.setDetail(product.getDetail());productDetailVo.setName(product.getName());productDetailVo.setStatus(product.getStatus());productDetailVo.setStock(product.getStock());productDetailVo.setImageHost(PropertiesUtil.getProperty("ftp.server.http.prefix","http://img.happymmall.com/"));Category category=categoryMapper.selectByPrimaryKey(product.getCategoryId());if(category==null){productDetailVo.setParentCategoryId(0);//默认根节点}else{productDetailVo.setParentCategoryId(category.getParentId());}productDetailVo.setCreateTime(DateTimeUtil.dateToStr(product.getCreateTime()));productDetailVo.setUpdateTime(DateTimeUtil.dateToStr(product.getUpdateTime()));return productDetailVo;}

这一行代码设置的是对应的图片服务器：下面会对这个作介绍：

 productDetailVo.setImageHost(PropertiesUtil.getProperty("ftp.server.http.prefix","http://img.happymmall.com/"));

selectByPrimaryKey方法使用的是逆向工程自动生成的方法。

2、PropertiesUtil工具的开发：

1、在util包下新建PropertiesUtil类

PropertiesUtil:

package com.mmall.util;import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Properties;/*** Created by geely*/
public class PropertiesUtil {private static Logger logger = LoggerFactory.getLogger(PropertiesUtil.class);private static Properties props;static {String fileName = "mmall.properties";props = new Properties();try {props.load(new InputStreamReader(PropertiesUtil.class.getClassLoader().getResourceAsStream(fileName),"UTF-8"));} catch (IOException e) {logger.error("配置文件读取异常",e);}}public static String getProperty(String key){String value = props.getProperty(key.trim());if(StringUtils.isBlank(value)){return null;}return value.trim();}public static String getProperty(String key,String defaultValue){String value = props.getProperty(key.trim());if(StringUtils.isBlank(value)){value = defaultValue;}return value.trim();}}

    String fileName = "mmall.properties";

这行代码所指的就是下文中新建的mmal.properties配置文件。

2、resouces目录下新建mmal.properties配置文件

image.png

mmal.properties:

//对应的ftp文件服务器的相关配置
ftp.server.ip=127.0.0.1
ftp.user=admin
ftp.pass=admin
ftp.server.http.prefix=http://image.imooc.com/alipay.callback.url=http://erjq8u.natappfree.cc/order/alipay_callback.dopassword.salt = geelysdafaqj23ou89ZXcj@#$@#$#@KJdjklj;D../dSF.,

3、DateTimeUtil时间处理工具

1、新建DateTimeUtil工具类

DateTimeUtil:

package com.mmall.util;import org.apache.commons.lang3.StringUtils;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;import java.util.Date;public class DateTimeUtil {//joda-time//str->date//date->strpublic static final String STANDARD_FORMAT="yyyy-MM-dd HH:mm:ss";public  static Date strToDate(String dateTimeStr,String formatStr){DateTimeFormatter dateTimeFormatter=DateTimeFormat.forPattern(formatStr);DateTime dateTime=dateTimeFormatter.parseDateTime(dateTimeStr);return dateTime.toDate();}public static String dateToStr(Date date,String formatStr){if(date==null){return StringUtils.EMPTY;}DateTime dateTime=new DateTime(date);return dateTime.toString(formatStr);}/**** @param dateTimeStr 具体时间* @param STANDARD_FORMAT  时间格式* @return*/public  static Date strToDate(String dateTimeStr){DateTimeFormatter dateTimeFormatter=DateTimeFormat.forPattern(STANDARD_FORMAT);DateTime dateTime=dateTimeFormatter.parseDateTime(dateTimeStr);return dateTime.toDate();}public static String dateToStr(Date date){if(date==null){return StringUtils.EMPTY;}DateTime dateTime=new DateTime(date);return dateTime.toString(STANDARD_FORMAT);}/* public static void main(String[] args) {System.out.println(DateTimeUtil.dateToStr(new Date(),"yyyy-MM-dd HH:mm:ss"));System.out.println(DateTimeUtil.strToDate("2016-02-09 11:45:28","yyyy-MM-dd HH:mm:ss"));}*/
}

4、接口测试

后台获取商品详情接口测试

image.png