SSM——框架初接触

来源：互联网发布：java内部类例子ppt 编辑：程序博客网时间：2024/06/09 15:55

在有了个模板的情况下自己琢磨SSM框架，

1.model.system文件夹里面写实体类，写具体的属性，并写set、get方法

例：Food类

属性foodId、foodname、price、place

getset方法（略）

2.dao.system文件夹里写User类的接口

创建FoodrMapper接口（！！是接口！！）

写Food类方法名，要用什么方法就写什么方法

3model.system文件夹里面写xml文件

UserMapper.xml

Mapper头文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >

对应的mapper接口在哪

对应的实体类在哪

对应的属性是什么

写方法的具体SQL语句

<sql id="Base_Column_List" >
    FOOD_ID, FOODNAME, PRICE, PLACE
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
    select
    <include refid="Base_Column_List" />
    from T_SYS_FOOD
    where FOOD_ID = #{foodId,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
    delete from T_SYS_FOOD
    where FOOD_ID = #{foodId,jdbcType=INTEGER}
</delete>

4service.system文件夹里写service

@Service
@Transactional
public class FoodService {

//在类上面上加这俩标签

@Autowired

//在方法上前面加@Autowired

private FoodMapper foodMapper;

    public int deleteByPrimaryKey(Integer foodId) {

       return foodMapper.deleteByPrimaryKey(foodId);
   }

   public int insert(Food record) {

       return foodMapper.insert(record);
   }

写调用方法

5controller.system文件夹里面写controller层

@Controller
@RequestMapping({ "/system/food" })

//还是在类上加标签

public class FoodController extends BaseController{

    @SuppressWarnings("unused")
   private final static Log log = LogFactory.getLog(FoodController.class);

   @Autowired
   private FoodService foodService;

   @RequestMapping(value = { "/init", "" })
   public String init() {
       return "system/food";
   }

   @RequestMapping(value = "/list")
   @ResponseBody
   public Map<String, Object> list(HttpServletRequest request, Food foodSearch) {
       Integer pageNum = Integer.parseInt(null == request.getParameter("page") ? 1 + "" : request.getParameter("page").toString());
       Integer pageSize = Integer.parseInt(null == request.getParameter("rows") ? 10 + "" : request.getParameter("rows").toString());
       Map<String, Object> conditions = new HashMap<String, Object>();
       conditions.put(Constants.Page.OFFSET, (pageNum - 1) * pageSize);
       conditions.put(Constants.Page.LIMIT, pageSize);
       conditions.put(Constants.Condition.ORDERBY_CLAUSE, "FOOD_ID DESC");

       List<Food> list = foodService.selectList(conditions);
       int total = foodService.selectCount(conditions);

       Map<String, Object> map = new HashMap<String, Object>();
       map.put("total", total);
       map.put("rows", list);
       return map;
   }

   @RequestMapping(value = "/save")
   @ResponseBody
   public Map<String, Object> save(Food food) {
       // food.setPassword(ConfigUtil.getConfig("init.password"));
       if (foodService.insertSelective(food) > 0) {
           return AjaxUtils.reponseToJson(Constants.Action.SAVE, true);
       }
       return AjaxUtils.reponseToJson(Constants.Action.SAVE, false);
   }

@RequestMapping(value = "/deleteAll")
   @ResponseBody
   public Map<String, Object> delete(@RequestParam(value = "ids", required = true) Integer foodId) {

       if (foodService.deleteByPrimaryKey(foodId) > 0) {
           return AjaxUtils.reponseToJson(Constants.Action.DELETE, true);
       }
       return AjaxUtils.reponseToJson(Constants.Action.DELETE, false);
   }

略了一些方法

6去写jsp页面，在页面上调用方法就好

0 0