SpringMVC,MyBatis商品的增删改查
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一、需求
商品的增删改查
二、工程结构
三、代码
1.Mapper层
(1)
ItemsMapperCustom.java
1 package com.tony.ssm.mapper; 2 3 import java.util.List; 4 5 import com.tony.ssm.po.ItemsCustom; 6 import com.tony.ssm.po.ItemsQueryVo; 7 8 public interface ItemsMapperCustom { 9 //商品查询列表 10 public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo)throws Exception; 11 }
ItemsMapperCustom.xml
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > 3 <mapper namespace="com.tony.ssm.mapper.ItemsMapperCustom" > 4 5 <!-- 定义商品查询的sql片段，就是商品查询条件 --> 6 <sql id="query_items_where"> 7 <!-- 使用动态sql，通过if判断，满足条件进行sql拼接 --> 8 <!-- 商品查询条件通过ItemsQueryVo包装对象 中itemsCustom属性传递 --> 9 <if test="itemsCustom!=null"> 10 <if test="itemsCustom.name!=null and itemsCustom.name!=‘‘"> 11 items.name LIKE ‘%${itemsCustom.name}%‘ 12 </if> 13 </if> 14 15 </sql> 16 17 <!-- 商品列表查询 --> 18 <!-- parameterType传入包装对象(包装了查询条件) 19 resultType建议使用扩展对象 20 --> 21 <select id="findItemsList" parameterType="com.tony.ssm.po.ItemsQueryVo" 22 resultType="com.tony.ssm.po.ItemsCustom"> 23 SELECT items.* FROM items 24 <where> 25 <include refid="query_items_where"></include> 26 </where> 27 </select> 28 29 </mapper>
(2)
ItemsMapper.java
1 package com.tony.ssm.mapper; 2 3 import com.tony.ssm.po.Items; 4 import com.tony.ssm.po.ItemsExample; 5 import java.util.List; 6 import org.apache.ibatis.annotations.Param; 7 8 public interface ItemsMapper { 9 int countByExample(ItemsExample example); 10 11 int deleteByExample(ItemsExample example); 12 13 int deleteByPrimaryKey(Integer id); 14 15 int insert(Items record); 16 17 int insertSelective(Items record); 18 19 List<Items> selectByExampleWithBLOBs(ItemsExample example); 20 21 List<Items> selectByExample(ItemsExample example); 22 23 Items selectByPrimaryKey(Integer id); 24 25 int updateByExampleSelective(@Param("record") Items record, @Param("example") ItemsExample example); 26 27 int updateByExampleWithBLOBs(@Param("record") Items record, @Param("example") ItemsExample example); 28 29 int updateByExample(@Param("record") Items record, @Param("example") ItemsExample example); 30 31 int updateByPrimaryKeySelective(Items record); 32 33 int updateByPrimaryKeyWithBLOBs(Items record); 34 35 int updateByPrimaryKey(Items record); 36 }
ItemsMapper.xml
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > 3 <mapper namespace="com.tony.ssm.mapper.ItemsMapper" > 4 <resultMap id="BaseResultMap" type="com.tony.ssm.po.Items" > 5 <id column="id" property="id" jdbcType="INTEGER" /> 6 <result column="name" property="name" jdbcType="VARCHAR" /> 7 <result column="price" property="price" jdbcType="REAL" /> 8 <result column="pic" property="pic" jdbcType="VARCHAR" /> 9 <result column="createtime" property="createtime" jdbcType="TIMESTAMP" /> 10 </resultMap> 11 <resultMap id="ResultMapWithBLOBs" type="com.tony.ssm.po.Items" extends="BaseResultMap" > 12 <result column="detail" property="detail" jdbcType="LONGVARCHAR" /> 13 </resultMap> 14 <sql id="Example_Where_Clause" > 15 <where > 16 <foreach collection="oredCriteria" item="criteria" separator="or" > 17 <if test="criteria.valid" > 18 <trim prefix="(" suffix=")" prefixOverrides="and" > 19 <foreach collection="criteria.criteria" item="criterion" > 20 <choose > 21 <when test="criterion.noValue" > 22 and ${criterion.condition} 23 </when> 24 <when test="criterion.singleValue" > 25 and ${criterion.condition} #{criterion.value} 26 </when> 27 <when test="criterion.betweenValue" > 28 and ${criterion.condition} #{criterion.value} and #{criterion.secondValue} 29 </when> 30 <when test="criterion.listValue" > 31 and ${criterion.condition} 32 <foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," > 33 #{listItem} 34 </foreach> 35 </when> 36 </choose> 37 </foreach> 38 </trim> 39 </if> 40 </foreach> 41 </where> 42 </sql> 43 <sql id="Update_By_Example_Where_Clause" > 44 <where > 45 <foreach collection="example.oredCriteria" item="criteria" separator="or" > 46 <if test="criteria.valid" > 47 <trim prefix="(" suffix=")" prefixOverrides="and" > 48 <foreach collection="criteria.criteria" item="criterion" > 49 <choose > 50 <when test="criterion.noValue" > 51 and ${criterion.condition} 52 </when> 53 <when test="criterion.singleValue" > 54 and ${criterion.condition} #{criterion.value} 55 </when> 56 <when test="criterion.betweenValue" > 57 and ${criterion.condition} #{criterion.value} and #{criterion.secondValue} 58 </when> 59 <when test="criterion.listValue" > 60 and ${criterion.condition} 61 <foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," > 62 #{listItem} 63 </foreach> 64 </when> 65 </choose> 66 </foreach> 67 </trim> 68 </if> 69 </foreach> 70 </where> 71 </sql> 72 <sql id="Base_Column_List" > 73 id, name, price, pic, createtime 74 </sql> 75 <sql id="Blob_Column_List" > 76 detail 77 </sql> 78 <select id="selectByExampleWithBLOBs" resultMap="ResultMapWithBLOBs" parameterType="com.tony.ssm.po.ItemsExample" > 79 select 80 <if test="distinct" > 81 distinct 82 </if> 83 <include refid="Base_Column_List" /> 84 , 85 <include refid="Blob_Column_List" /> 86 from items 87 <if test="_parameter != null" > 88 <include refid="Example_Where_Clause" /> 89 </if> 90 <if test="orderByClause != null" > 91 order by ${orderByClause} 92 </if> 93 </select> 94 <select id="selectByExample" resultMap="BaseResultMap" parameterType="com.tony.ssm.po.ItemsExample" > 95 select 96 <if test="distinct" > 97 distinct 98 </if> 99 <include refid="Base_Column_List" /> 100 from items 101 <if test="_parameter != null" > 102 <include refid="Example_Where_Clause" /> 103 </if> 104 <if test="orderByClause != null" > 105 order by ${orderByClause} 106 </if> 107 </select> 108 <select id="selectByPrimaryKey" resultMap="ResultMapWithBLOBs" parameterType="java.lang.Integer" > 109 select 110 <include refid="Base_Column_List" /> 111 , 112 <include refid="Blob_Column_List" /> 113 from items 114 where id = #{id,jdbcType=INTEGER} 115 </select> 116 <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" > 117 delete from items 118 where id = #{id,jdbcType=INTEGER} 119 </delete> 120 <delete id="deleteByExample" parameterType="com.tony.ssm.po.ItemsExample" > 121 delete from items 122 <if test="_parameter != null" > 123 <include refid="Example_Where_Clause" /> 124 </if> 125 </delete> 126 <insert id="insert" parameterType="com.tony.ssm.po.Items" > 127 insert into items (id, name, price, 128 pic, createtime, detail 129 ) 130 values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}, #{price,jdbcType=REAL}, 131 #{pic,jdbcType=VARCHAR}, #{createtime,jdbcType=TIMESTAMP}, #{detail,jdbcType=LONGVARCHAR} 132 ) 133 </insert> 134 <insert id="insertSelective" parameterType="com.tony.ssm.po.Items" > 135 insert into items 136 <trim prefix="(" suffix=")" suffixOverrides="," > 137 <if test="id != null" > 138 id, 139 </if> 140 <if test="name != null" > 141 name, 142 </if> 143 <if test="price != null" > 144 price, 145 </if> 146 <if test="pic != null" > 147 pic, 148 </if> 149 <if test="createtime != null" > 150 createtime, 151 </if> 152 <if test="detail != null" > 153 detail, 154 </if> 155 </trim> 156 <trim prefix="values (" suffix=")" suffixOverrides="," > 157 <if test="id != null" > 158 #{id,jdbcType=INTEGER}, 159 </if> 160 <if test="name != null" > 161 #{name,jdbcType=VARCHAR}, 162 </if> 163 <if test="price != null" > 164 #{price,jdbcType=REAL}, 165 </if> 166 <if test="pic != null" > 167 #{pic,jdbcType=VARCHAR}, 168 </if> 169 <if test="createtime != null" > 170 #{createtime,jdbcType=TIMESTAMP}, 171 </if> 172 <if test="detail != null" > 173 #{detail,jdbcType=LONGVARCHAR}, 174 </if> 175 </trim> 176 </insert> 177 <select id="countByExample" parameterType="com.tony.ssm.po.ItemsExample" resultType="java.lang.Integer" > 178 select count(*) from items 179 <if test="_parameter != null" > 180 <include refid="Example_Where_Clause" /> 181 </if> 182 </select> 183 <update id="updateByExampleSelective" parameterType="map" > 184 update items 185 <set > 186 <if test="record.id != null" > 187 id = #{record.id,jdbcType=INTEGER}, 188 </if> 189 <if test="record.name != null" > 190 name = #{record.name,jdbcType=VARCHAR}, 191 </if> 192 <if test="record.price != null" > 193 price = #{record.price,jdbcType=REAL}, 194 </if> 195 <if test="record.pic != null" > 196 pic = #{record.pic,jdbcType=VARCHAR}, 197 </if> 198 <if test="record.createtime != null" > 199 createtime = #{record.createtime,jdbcType=TIMESTAMP}, 200 </if> 201 <if test="record.detail != null" > 202 detail = #{record.detail,jdbcType=LONGVARCHAR}, 203 </if> 204 </set> 205 <if test="_parameter != null" > 206 <include refid="Update_By_Example_Where_Clause" /> 207 </if> 208 </update> 209 <update id="updateByExampleWithBLOBs" parameterType="map" > 210 update items 211 set id = #{record.id,jdbcType=INTEGER}, 212 name = #{record.name,jdbcType=VARCHAR}, 213 price = #{record.price,jdbcType=REAL}, 214 pic = #{record.pic,jdbcType=VARCHAR}, 215 createtime = #{record.createtime,jdbcType=TIMESTAMP}, 216 detail = #{record.detail,jdbcType=LONGVARCHAR} 217 <if test="_parameter != null" > 218 <include refid="Update_By_Example_Where_Clause" /> 219 </if> 220 </update> 221 <update id="updateByExample" parameterType="map" > 222 update items 223 set id = #{record.id,jdbcType=INTEGER}, 224 name = #{record.name,jdbcType=VARCHAR}, 225 price = #{record.price,jdbcType=REAL}, 226 pic = #{record.pic,jdbcType=VARCHAR}, 227 createtime = #{record.createtime,jdbcType=TIMESTAMP} 228 <if test="_parameter != null" > 229 <include refid="Update_By_Example_Where_Clause" /> 230 </if> 231 </update> 232 <update id="updateByPrimaryKeySelective" parameterType="com.tony.ssm.po.Items" > 233 update items 234 <set > 235 <if test="name != null" > 236 name = #{name,jdbcType=VARCHAR}, 237 </if> 238 <if test="price != null" > 239 price = #{price,jdbcType=REAL}, 240 </if> 241 <if test="pic != null" > 242 pic = #{pic,jdbcType=VARCHAR}, 243 </if> 244 <if test="createtime != null" > 245 createtime = #{createtime,jdbcType=TIMESTAMP}, 246 </if> 247 <if test="detail != null" > 248 detail = #{detail,jdbcType=LONGVARCHAR}, 249 </if> 250 </set> 251 where id = #{id,jdbcType=INTEGER} 252 </update> 253 <update id="updateByPrimaryKeyWithBLOBs" parameterType="com.tony.ssm.po.Items" > 254 update items 255 set name = #{name,jdbcType=VARCHAR}, 256 price = #{price,jdbcType=REAL}, 257 pic = #{pic,jdbcType=VARCHAR}, 258 createtime = #{createtime,jdbcType=TIMESTAMP}, 259 detail = #{detail,jdbcType=LONGVARCHAR} 260 where id = #{id,jdbcType=INTEGER} 261 </update> 262 <update id="updateByPrimaryKey" parameterType="com.tony.ssm.po.Items" > 263 update items 264 set name = #{name,jdbcType=VARCHAR}, 265 price = #{price,jdbcType=REAL}, 266 pic = #{pic,jdbcType=VARCHAR}, 267 createtime = #{createtime,jdbcType=TIMESTAMP} 268 where id = #{id,jdbcType=INTEGER} 269 </update> 270 </mapper>
2.Service层
(1)
ItemsService.java
1 package com.tony.ssm.service; 2 3 import java.util.List; 4 5 import com.tony.ssm.po.ItemsCustom; 6 import com.tony.ssm.po.ItemsQueryVo; 7 8 /** 9 * 10 * <p>Title: ItemsService</p> 11 * <p>Description:商品管理service </p> 12 */ 13 public interface ItemsService { 14 15 //商品查询列表 16 public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) throws Exception; 17 18 //根据id查询商品信息 19 /** 20 * 21 * <p>Title: findItemsById</p> 22 * <p>Description: </p> 23 * @param id 查询商品的id 24 * @return 25 * @throws Exception 26 */ 27 public ItemsCustom findItemsById(Integer id) throws Exception; 28 29 //修改商品信息 30 /** 31 * 32 * <p>Title: updateItems</p> 33 * <p>Description: </p> 34 * @param id 修改商品的id 35 * @param itemsCustom 修改的商品信息 36 * @throws Exception 37 */ 38 public void updateItems(Integer id,ItemsCustom itemsCustom) throws Exception; 39 40 41 }
ItemsServiceImpl.java
1 package com.tony.ssm.service.impl; 2 3 import java.util.List; 4 5 import org.springframework.beans.BeanUtils; 6 import org.springframework.beans.factory.annotation.Autowired; 7 8 import com.tony.ssm.exception.CustomException; 9 import com.tony.ssm.mapper.ItemsMapper; 10 import com.tony.ssm.mapper.ItemsMapperCustom; 11 import com.tony.ssm.po.Items; 12 import com.tony.ssm.po.ItemsCustom; 13 import com.tony.ssm.po.ItemsQueryVo; 14 import com.tony.ssm.service.ItemsService; 15 16 /** 17 * 18 * <p>Title: ItemsServiceImpl</p> 19 * <p>Description: 商品管理</p> 20 */ 21 public class ItemsServiceImpl implements ItemsService{ 22 23 @Autowired 24 private ItemsMapperCustom itemsMapperCustom; 25 26 @Autowired 27 private ItemsMapper itemsMapper; 28 29 @Override 30 public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) 31 throws Exception { 32 //通过ItemsMapperCustom查询数据库 33 return itemsMapperCustom.findItemsList(itemsQueryVo); 34 } 35 36 @Override 37 public ItemsCustom findItemsById(Integer id) throws Exception { 38 39 Items items = itemsMapper.selectByPrimaryKey(id); 40 if(items==null){ 41 throw new CustomException("修改的商品信息不存在!"); 42 } 43 //中间对商品信息进行业务处理 44 //.... 45 //返回ItemsCustom 46 ItemsCustom itemsCustom = null; 47 //将items的属性值拷贝到itemsCustom 48 if(items!=null){ 49 itemsCustom = new ItemsCustom(); 50 BeanUtils.copyProperties(items, itemsCustom); 51 } 52 53 54 return itemsCustom; 55 56 } 57 58 @Override 59 public void updateItems(Integer id, ItemsCustom itemsCustom) throws Exception { 60 //添加业务校验，通常在service接口对关键参数进行校验 61 //校验 id是否为空，如果为空抛出异常 62 63 //更新商品信息使用updateByPrimaryKeyWithBLOBs根据id更新items表中所有字段，包括 大文本类型字段 64 //updateByPrimaryKeyWithBLOBs要求必须转入id 65 itemsCustom.setId(id); 66 itemsMapper.updateByPrimaryKeyWithBLOBs(itemsCustom); 67 } 68 69 }
3.Controller层
(1)ItemsController.java
1 package com.tony.ssm.controller; 2 3 import java.io.File; 4 import java.util.HashMap; 5 import java.util.List; 6 import java.util.Map; 7 import java.util.UUID; 8 9 import javax.servlet.http.HttpServletRequest; 10 11 import org.springframework.beans.factory.annotation.Autowired; 12 import org.springframework.stereotype.Controller; 13 import org.springframework.ui.Model; 14 import org.springframework.validation.BindingResult; 15 import org.springframework.validation.ObjectError; 16 import org.springframework.validation.annotation.Validated; 17 import org.springframework.web.bind.annotation.ModelAttribute; 18 import org.springframework.web.bind.annotation.PathVariable; 19 import org.springframework.web.bind.annotation.RequestMapping; 20 import org.springframework.web.bind.annotation.RequestMethod; 21 import org.springframework.web.bind.annotation.RequestParam; 22 import org.springframework.web.bind.annotation.ResponseBody; 23 import org.springframework.web.multipart.MultipartFile; 24 import org.springframework.web.servlet.ModelAndView; 25 26 import com.tony.ssm.controller.validation.ValidateGroup1; 27 import com.tony.ssm.po.ItemsCustom; 28 import com.tony.ssm.po.ItemsQueryVo; 29 import com.tony.ssm.service.ItemsService; 30 31 /** 32 * 33 * <p>Title: ItemsController1</p> 34 * <p>Description:实现controller接口的 处理器 </p> 35 */ 36 @Controller 37 @RequestMapping("/items") 38 public class ItemsController { 39 40 @Autowired 41 private ItemsService itemsService; 42 43 @RequestMapping("/queryItems") 44 public ModelAndView queryItems(HttpServletRequest request, 45 ItemsQueryVo itemsQueryVo) throws Exception { 46 47 // 测试forward后request是否可以共享 48 System.out.println(request.getParameter("id")); 49 50 //调用service查找 数据库，查询商品列表 51 List<ItemsCustom> itemsList = itemsService.findItemsList(itemsQueryVo); 52 53 //返回ModelAndView 54 ModelAndView modelAndView = new ModelAndView(); 55 //相当 于request的setAttribut，在jsp页面中通过itemsList取数据 56 modelAndView.addObject("itemsList", itemsList); 57 58 //指定视图 59 modelAndView.setViewName("items/itemsList"); 60 61 return modelAndView; 62 } 63 64 //@RequestMapping("/editItems") 65 // @RequestMapping(value="/editItems",method={RequestMethod.POST,RequestMethod.GET}) 66 // public ModelAndView editItems() throws Exception { 67 // //调用service根据商品id查询商品信息 68 // ItemsCustom itemsCustom = itemsService.findItemsById(1); 69 // 70 // // 返回ModelAndView 71 // ModelAndView modelAndView = new ModelAndView(); 72 // 73 // //将商品信息放到model 74 // modelAndView.addObject("itemsCustom", itemsCustom); 75 // 76 // //商品修改页面1 77 // modelAndView.setViewName("items/editItems"); 78 // 79 // return modelAndView; 80 // } 81 82 //controller可能返回ModelAndView、String、void 83 // @RequestParam里边指定request传入参数名称和形参进行绑定。 84 // 通过required属性指定参数是否必须要传入 85 // 通过defaultValue可以设置默认值，如果id参数没有传入，将默认值和形参绑定。 86 @RequestMapping(value="/editItems",method={RequestMethod.POST,RequestMethod.GET}) 87 public String editItems(Model model,@RequestParam(value="id") Integer items_id) throws Exception { 88 //调用service根据商品id查询商品信息 89 ItemsCustom itemsCustom = itemsService.findItemsById(items_id); 90 91 // if(itemsCustom == null){ 92 // throw new CustomException("商品不存在"); 93 // } 94 95 // 通过形参中的model将model数据传到页面 96 // 相当于modelAndView.addObject方法 97 model.addAttribute("items", itemsCustom); 98 return "items/editItems"; 99 } 100 101 @RequestMapping("/editItemsSubmit") 102 public String editItemsSubmit(Model model, 103 HttpServletRequest request, 104 Integer id, 105 @ModelAttribute("items") @Validated(value={ValidateGroup1.class}) ItemsCustom itemsCustom, 106 BindingResult bindingResult, 107 MultipartFile itemsPic) throws Exception { 108 // 获取校验错误信息 109 if(bindingResult.hasErrors()){ 110 List<ObjectError> allErrors = bindingResult.getAllErrors(); 111 for(ObjectError error : allErrors){ 112 System.out.println(error.getDefaultMessage()); 113 } 114 115 // 将错误信息传到页面 116 model.addAttribute("allErrors", allErrors); 117 118 //如果不用@ModelAttribute也可以使用model.addAttribute("items",以上是关于SpringMVC,MyBatis商品的增删改查的主要内容，如果未能解决你的问题，请参考以下文章