额外：
现在写博客就是逼着自己多去总结，在以后的项目中少走弯路。
- 公共类
1.BaseDao.java BaseService.java两个里面的内容都是一样的，都是对公共的方法用接口进行封装。一个用在持久化层，一个用在业务层，这里只写一个。
package org.niugang.dao; import java.util.List; /** * * @Description:基础持久化类 * @Project:boot-base * @File:BaseDao.java * @Package:org.niugang.dao * @Date:2018年7月5日下午7:36:11 * @author:niugang * @Copyright (c) 2018, 863263957@qq.com All Rights Reserved. * */ public interface BaseDao<T, S> { List<T> getList(S s); List<T> getListByPage(S s); void insert(S s); void delete(int id); T getById(int id); T get(S s); int count(S s); void update(S s); }
- 演示代码
针对 部门信息表 进行封装。
1.实体类
package org.niugang.dept.entity; import java.util.Date; /** * * @Description:部门实体类 * @Project:boot-sis * @File:DeptEntity.java * @Package:org.niugang.dept.entity * @Date:2018年7月5日下午3:09:32 * @author:niugang * @Copyright (c) 2018, 863263957@qq.com All Rights Reserved. * */ public class DeptEntity { /** * id */ private Integer id; /** * 部门名称 */ private String deptName; /** * 父id */ private Integer parentId; /** * 层级编码 */ private String code; /** * 删除标识 */ private String deleteFlag; /** * 全拼 */ private String quanPin; /** * 简拼 */ private String jianPin; private Date createTime; private String creator; private Date updateTime; private String updator; /** * 版本号 */ private Long version; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getDeptName() { return deptName; } public void setDeptName(String deptName) { this.deptName = deptName; } public Integer getParentId() { return parentId; } public void setParentId(Integer parentId) { this.parentId = parentId; } public String getCode() { return code; } public void setCode(String code) { this.code = code; } public String getDeleteFlag() { return deleteFlag; } public void setDeleteFlag(String deleteFlag) { this.deleteFlag = deleteFlag; } public String getQuanPin() { return quanPin; } public void setQuanPin(String quanPin) { this.quanPin = quanPin; } public String getJianPin() { return jianPin; } public void setJianPin(String jianPin) { this.jianPin = jianPin; } public Date getCreateTime() { return createTime; } public void setCreateTime(Date createTime) { this.createTime = createTime; } public String getCreator() { return creator; } public void setCreator(String creator) { this.creator = creator; } public Date getUpdateTime() { return updateTime; } public void setUpdateTime(Date updateTime) { this.updateTime = updateTime; } public String getUpdator() { return updator; } public void setUpdator(String updator) { this.updator = updator; } public Long getVersion() { return version; } public void setVersion(Long version) { this.version = version; } }
2.Dao类
3.查询Bean
解释：查询bean主要是在DeptEntity上进行再次封装，用于查询参数传递，扩展其他字段。
package org.niugang.dept.bean; import org.niugang.constant.CodeConstant; import org.niugang.dept.entity.DeptEntity; /** * * @Description:部门查询bean * @Project:boot-sis * @File:DeptQueryBean.java * @Package:org.niugang.dept.bean * @Date:2018年7月5日下午5:41:49 * @author:niugang * @Copyright (c) 2018, 863263957@qq.com All Rights Reserved. * */ public class DeptQueryBean extends DeptEntity { /** * 页面 */ private Integer pageNo = CodeConstant.DEFAULT_PAGE_NUMBER; /** * 分页大小 */ private Integer pageSize = CodeConstant.DEFAULT_PAGE_SIZE; /** * 开始查询行 */ private Integer startRecord; /** * 定义查询字段，在有些情况下并非所有的字段都查询，只查询给定字段 */ private String[] queryField; public Integer getPageNo() { return pageNo; } public void setPageNo(Integer pageNo) { this.pageNo = pageNo; } public Integer getPageSize() { return pageSize; } public void setPageSize(Integer pageSize) { this.pageSize = pageSize; } public Integer getStartRecord() { return (pageNo - 1) * pageSize; } public void setStartRecord(Integer startRecord) { this.startRecord = startRecord; } public String[] getQueryField() { return queryField; } public void setQueryField(String ...queryField) { this.queryField = queryField; } }
高度整合，细细研究
3.mapper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" > <mapper namespace="org.niugang.dept.dao.DeptDao"> <resultMap id="BaseResultMap" type="org.niugang.dept.entity.DeptEntity"> <result column="c_id" property="id" /> <result column="c_dept_name" property="deptName" /> <result column="c_parent_id" property="parentId" /> <result column="c_code" property="code" /> <result column="c_delete_flag" property="deleteFlag" /> <result column="c_quanpin" property="quanPin" /> <result column="c_jianpin" property="jianPin" /> <result column="c_createtime" property="createTime" /> <result column="c_creator" property="creator" /> <result column="c_updatetime" property="updateTime" /> <result column="c_updator" property="updator" /> <result column="c_version" property="version" /> </resultMap> <!--查询字段 --> <sql id="Base_Column_List"> <choose> <!--只查询给定字段 --> <when test="queryField!=null"> <foreach collection="queryField" separator="," item="item"> <if test="item!=null and item!=''"> <!--这里只能用${},因为${}是指传什么就用什么，而#{}是根据传的调用起get..方法 --> ${item} </if> </foreach> </when> <!--查询全部字段 --> <otherwise> c_id, c_dept_name, c_parent_id, c_code, c_delete_flag, c_quanpin, c_jianpin, c_createtime, c_creator, c_updatetime, c_updator, c_version </otherwise> </choose> </sql> <!-- 查询条件 --> <sql id="queryCondition"> <where> <if test="id!=null"> and c_id=#{id} </if> <if test="deptName!=null and deptName!=''"> and c_dept_name like "%"#{deptName}"%" </if> <if test="parentId!=null and parentId!=''"> and c_parent_id =#{parentId} </if> <if test="code!=null and code!=''"> and c_code like "%"#{code}"%" </if> <if test="deleteFlag!=null and deleteFlag!=''"> and c_delete_flag=#{deleteFlag} </if> <if test="quanPin!=null and quanPin!=''"> and c_quanpin like "%"#{quanPin}"%" </if> <if test="jianPin!=null and jianPin!=''"> and c_jianpin like "%"#{jianPin}"%" </if> <if test="createTime!=null and createTime!=''"> and c_createtime=#{createTime} </if> <if test="creator!=null and creator!=''"> and c_creator=#{creator} </if> <if test="updateTime!=null and updateTime!=''"> and c_updatetime=#{updateTime} </if> <if test="version!=null and version!=''"> and c_version=#{version} </if> </where> </sql> <!--分页查询条件 --> <sql id="limitCoddition"> order by c_id desc limit <choose> <when test="startRecord!=null and startRecord!=''"> #{startRecord}, </when> <otherwise> 0, </otherwise> </choose> <choose> <when test="pageSize!=null and pageSize!=''"> #{pageSize} </when> <otherwise> 10 </otherwise> </choose> </sql> <!--查询集合 --> <select id="getList" resultMap="BaseResultMap" parameterType="org.niugang.dept.bean.DeptQueryBean"> select <include refid="Base_Column_List" /> from t_boot_dept <include refid="queryCondition" /> </select> <!--分页查询 --> <select id="getListByPage" resultMap="BaseResultMap" parameterType="org.niugang.dept.bean.DeptQueryBean"> select <include refid="Base_Column_List" /> from t_boot_dept <include refid="queryCondition" /> <include refid="limitCoddition" /> </select> <!--插入 --> <insert id="insert" parameterType="org.niugang.dept.bean.DeptQueryBean"> <!-- mysql数据库自增 --> <selectKey resultType="java.lang.Integer" order="AFTER" keyProperty="id" keyColumn="c_id"> SELECT LAST_INSERT_ID() AS id </selectKey> INSERT INTO `t_boot_dept` ( <trim suffixOverrides=","> <!--字符串类型需要判断是否为'' --> <!--对象只需要判断是否为空 --> <if test="deptName!=null and deptName!=''"> `c_dept_name`, </if> <if test="parentId!=null"> `c_parent_id`, </if> <if test="code!=null and code!=''"> `code`, </if> <if test="deleteFlag!=null and deleteFlag!=''"> `c_delete_flag`, </if> <if test="quanPin!=null and quanPin!=''"> `c_quanpin`, </if> <if test="jianPin!=null and jianPin!=''"> `c_jianpin`, </if> `c_createtime`, <if test="creator!=null and creator!=''"> `c_creator`, </if> <if test="updateTime!=null"> `c_updatetime`, </if> <if test="updator!=null and updator!=''"> `c_updator`, </if> <if test="version!=null"> `c_version` </if> </trim> ) VALUES ( <trim suffixOverrides=","> <if test="deptName!=null and deptName!=''"> #{deptName}, </if> <if test="parentId!=null"> #{parentId}, </if> <if test="code!=null and code!=''"> #{code}, </if> <if test="deleteFlag!=null and deleteFlag!=''"> #{deleteFlag}, </if> <if test="quanPin!=null and quanPin!=''"> #{quanPin}, </if> <if test="jianPin!=null and jianPin!=''"> #{jianPin}, </if> NOW(), <if test="creator!=null and creator!=''"> #{creator}, </if> <if test="updateTime!=null"> #{updateTime}, </if> <if test="updator!=null and updator!=''"> #{updator}, </if> <if test="version!=null"> #{version} </if> </trim> ) </insert> <!--删除 --> <delete id="delete" parameterType="int"> delete from t_boot_dept where c_id =#{id} </delete> <!--根据主键查询 --> <select id="getById" parameterType="int" resultMap="BaseResultMap"> select <include refid="Base_Column_List" /> from t_boot_dept where c_id =#{id} </select> <!--查询单个对象 --> <select id="get" parameterType="org.niugang.dept.bean.DeptQueryBean" resultMap="BaseResultMap"> select <include refid="Base_Column_List" /> from t_boot_dept <include refid="queryCondition" /> </select> <!--查询数量 --> <select id="count" parameterType="org.niugang.dept.bean.DeptQueryBean" resultType="int"> select count(*) from t_boot_dept <include refid="queryCondition" /> </select> <!--更新 --> <update id="update" parameterType="org.niugang.dept.bean.DeptQueryBean"> <if test="id!=null"> update t_boot_dept <trim prefix="set" suffixOverrides=","> <if test="deptName!=null and deptName!=''"> c_dept_name=#{deptName}, </if> <if test="parentId!=null and parentId!=''"> c_parent_id=#{parentId}, </if> <if test="code!=null and code!=''"> c_code=#{code}, </if> <if test="deleteFlag!=null and deleteFlag!=''"> c_delete_flag=#{deleteFlag}, </if> <if test="quanPin!=null and quanPin!=''"> c_quanpin=#{quanPin}, </if> <if test="jianPin!=null and jianPin!=''"> c_jianpin=#{jianPin}, </if> <if test="createTime!=null"> c_createtime=#{createTime}, </if> <if test="creator!=null and creator!=''"> c_creator=#{creator}, </if> c_updatetime=now(), <if test="version!=null and version!=''"> c_version=#{version} </if> </trim> where c_id=#{id} </if> </update> </mapper>
微信公众号
