SSM——框架初接触

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

<mapper namespace="com.bpf.base.dao.system.FoodrMapper" >

对应的实体类在哪

 <resultMap id="BaseResultMap" type="com.bpf.base.model.system.Food" >

对应的属性是什么

    <id column="FOOD_ID" property="foodId" jdbcType="INTEGER" />

    <result column="FOODNAME" property="foodname" jdbcType="VARCHAR" />

    <result column="PRICE" property="price" jdbcType="INTEGER" />

    <result column="PLACE" property="place" jdbcType="VARCHAR" />

  </resultMap>

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