通用的jsp动态下拉

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<c:forEach var="o" items="${options}">
    <option value="${o.optionKey}" ${selected == o.optionKey?"selected":"" }>${o.optionValue}</option>
</c:forEach>

<select name="brand_id">
   <c:set value="${pageParam.brand_id}" var="selected" />
   <c:import url="/options/brand" />
</select>

import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;

/**
 * @author  liujun
 * @since 2018/1/19.
 * @see Controller
 * 下拉选项数据列表
 */
@Controller
@RequestMapping(value = "/options")
public class OptionsController {
    @Autowired
    OptionService optionService;
    @RequestMapping(value = "/goodsType")
    public String goodsTypeOtions(HttpServletRequest request ,Model model){
        String condition = request.getParameter("condition");
        String order = request.getParameter("order");
        Map<String,Object> param = new HashMap<String, Object>();
        if(StringUtils.isNotBlank(condition)){
            param.put("condition",condition);
        }
        if(StringUtils.isNotBlank(condition)){
            param.put("order",order);
        }
        model.addAttribute("options",this.optionService.goodsTypeOption(param));
        return "common/options";
    }
    @RequestMapping(value = "/brand")
    public String brandOtions(HttpServletRequest request ,Model model){
        String condition = request.getParameter("condition");
        String order = request.getParameter("order");
        Map<String,Object> param = new HashMap<String, Object>();
        if(StringUtils.isNotBlank(condition)){
            param.put("condition",condition);
        }
        if(StringUtils.isNotBlank(condition)){
            param.put("order",order);
        }
        model.addAttribute("options",this.optionService.brandOption(param));
        return "common/options";
    }
}

import java.util.List;
import java.util.Map;

/**
 * @author liujun
        * @since 2018/1/19.
        */
public interface OptionService {
    public List<Map<String,Object>>  goodsTypeOption(Map<String,Object> param);
    public List<Map<String,Object>>  brandOption(Map<String,Object> param);
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * 下拉选项数据列表
 * @author  liujun
 * @since 2018/1/19.
 * @see OptionService
 * @see Service
 *
 */
@Service
public class OptionServiceImpl implements OptionService{

    @Autowired
    GenericMybatisDao dao;
    @Override
    public List<Map<String, Object>> goodsTypeOption(Map<String, Object> param) {
        return findData(OptionQueryEnum.GOODS_TYPE_OPTION.getQuery(),param);
    }

    @Override
    public List<Map<String, Object>> brandOption(Map<String, Object> param) {
        return findData(OptionQueryEnum.BRAND_OTION.getQuery(),param);
    }

    public List<Map<String, Object>> findData(String querySql,Map<String,Object> param){
        StringBuilder sql = new StringBuilder(querySql);
        Map<String,Object> map = new HashMap<String, Object>();
        if(param != null){
            if(param.get("condition")!=null){
                String[] conditions = param.get("condition").toString().split(",");
                for(String condition : conditions){
                    sql.append(" and ");
                    sql.append(condition);
                }
            }
            if(param.get("order")!=null){
                sql.append(" order by ");
                sql.append(param.get("order"));
            }
        }
        map.put("sqltext",sql);
        return this.dao.list(map);
    }

    enum  OptionQueryEnum{
        GOODS_TYPE_OPTION(" select cat_id as optionKey,cat_name as optionValue from ecs_goods_type where 1=1 "),
        BRAND_OTION(" select brand_id as optionKey,brand_name as optionValue from ecs_brand where 1=1 ");
        private String query;
        private OptionQueryEnum(String query){
            this.query = query;
        }

        public String getQuery() {
            return query;
        }

        public void setQuery(String query) {
            this.query = query;
        }
    }


}

import java.util.List;
import java.util.Map;

/**
 * Created by liujun on 2018/1/10.
 */
public interface GenericMybatisDao {
    /**
     * 查询数据通用接口
     * @param param 查询数据参数
     * @return 查询结果集
     */
    public List<Map<String,Object>> list(Map<String,Object> param);

    /**
     * 保存数据通用接口
     * @param param 参数
     * @return 修改记录数量
     */
    public Integer update(Map<String,Object> param);

    /**
     * 保存数据通用接口
     * @param param 参数
     * @return 修改记录数量
     */
    public Integer insert(Map<String,Object> param);

    /**
     * 删除数据通用接口
     * @param param 参数
     * @return
     */
    public Integer delete(Map<String,Object> param);
}

<?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" >
<mapper namespace="com.jeff.tianti.dao.mybatis.GenericMybatisDao">
    <select id="list" statementType="PREPARED"  resultType="java.util.LinkedHashMap" parameterType="map">
       ${sqltext}
    </select>
    <update id="update" statementType="PREPARED" parameterType="map">
        ${sqltext}
    </update>
    <insert id="insert" statementType="PREPARED" parameterType="map">
        ${sqltext}
    </insert>
    <delete id="delete" statementType="PREPARED" parameterType="map">
         ${sqltext}
    </delete>
</mapper>