1.创建一个实体包entity，用来与数据库中表一一对应
2.创建一个DAO包，用来处理对应的表操作
@Component(value="adminDAOImpl")
public class AdminDAOImpl implements AdminDAO {
private AdminUserMapper adminUserMapper;
@Override
public void save(Admin user) {
}
/**
*
* @param adminUser 提交的表单admin的信息
*/
@Override
public Admin find(Admin adminUser) {
Map<String, Object> param = new HashMap<String, Object>();
param.put("username", adminUser.getUsername());
param.put("password", adminUser.getPassword());
return adminUserMapper.getAdminUser(param);
}
public AdminUserMapper getAdminUserMapper() {
return adminUserMapper;
}
@Resource(name="adminUserMapper")
public void setAdminUserMapper(AdminUserMapper adminUserMapper) {
this.adminUserMapper = adminUserMapper;
}
/**
* 获取所有Admin信息
*/
@Override
public PageBean<Admin> getAdminAll(int pc)
{
/*
* 1. 得到ps
* 2. 得到tr
* 3. 得到beanList
* 4. 创建PageBean，返回
*/
/*
* 1. 得到ps
*/
int ps = PageConstants.ORDER_PAGE_SIZE;//每页记录数
/*
* 3. 总记录数
*/
int tr = adminUserMapper.getAdminAllNum();//得到了总记录数
/*
* 4. 得到beanList，即当前页记录
*/
// Map<Integer, Object> map = new HashMap<Integer, Object>();
// map.put("curpage", 8 * (pc -1));
List<Admin> beanList = adminUserMapper.adminPageData(pc);
/*
* 5. 创建PageBean，设置参数
*/
PageBean<Admin> pb = new PageBean<Admin>();
/*
* 其中PageBean没有url，这个任务由Servlet完成
*/
pb.setBeanList(beanList);
pb.setPc(pc); //当前页
pb.setPs(ps); //每页记录数
pb.setTr(tr); //总记录数
return pb;
}
@Override
public void modifyPassword(Admin adminUser) {
Map<String, Object> param = new HashMap<String, Object>();
param.put("username", adminUser.getUsername());
param.put("password", adminUser.getPassword());
param.put("newPassword", adminUser.getNewPassword());
this.adminUserMapper.modifyPassword(param);
}
@Override
public Admin getAdminUserInfo(String user) {
return this.adminUserMapper.getAdminUserInfo(user);
}
@Override
public void updateAdminUser(Admin admin) {
this.adminUserMapper.updateAdminUser(admin);
}
}
3.创建对应的映射接口文件，用来执行增删改查的操作，可以创建一个单独的映射包mapper
public interface AdminUserMapper {
/**
* 获取管理员用户用户名和密码来查询管理员是否存在
* @param adminInfo 是key-value结构，使用容器来传递数据信息, key代表表的字段，value是值
* @return
*/
public Admin getAdminUser(Map<String, Object> adminInfo);
/**
* 获取所有管理员信息
* @return
*/
public List<Admin> getAdminAll();
/**
* 查询总计有多少条管理员记录
* @return
*/
public Integer getAdminAllNum();
/**
* 查找当前页面的管理员列表
* @param curPage
* @return
*/
public List<Admin> adminPageData(Integer curPage);
/**
* 修改管理员密码
* @param adminInfo
*/
public void modifyPassword(Map<String, Object> adminInfo);
/**
* 根据用户名查找管理员信息
* @param user
* @return
*/
public Admin getAdminUserInfo(String user);
/**
* 更新管理员信息
* @param admin
* @return
*/
public Integer updateAdminUser(Admin admin);
}
4.配置文件的设置
1.mybatis的文件配置
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 别名 -->
<typeAliases>
<typeAlias type="com.hyd.carloan.business.merchant.admin.entity.Admin" alias="admin"/>
<typeAlias type="com.hyd.carloan.business.merchant.category.entity.Category" alias="category"/>
<typeAlias type="com.hyd.carloan.business.merchant.front.entity.T_user" alias="frontUser"/>
<typeAlias type="com.hyd.carloan.business.merchant.borrow.entity.Borrow" alias="borrow"/>
</typeAliases>
<mappers>
<mapper resource="/mybatis/AdminUserTable.xml"></mapper>
<mapper resource="/mybatis/UserTable.xml"></mapper>
<mapper resource="/mybatis/CategoryTable.xml"></mapper>
<mapper resource="/mybatis/BorrowTable.xml"></mapper>
</mappers>
</configuration>
上面是别名，下面是对应表的操作文件
2.操作表的配置文件
<?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="com.hyd.carloan.business.merchant.admin.dao.AdminUserMapper">
<resultMap type="Admin" id="AdminResultMap">
<id property="id" column="id" />
<result property="username" column="username" />
<result property="password" column="password" />
<result property="enable" column="enable" />
<result property="lastLoginTime" column="lastLoginTime" />
<result property="lastLoginIP" column="lastLoginIP" />
<result property="roleId" column="roleId" />
<result property="realName" column="realName" />
<result property="telphone" column="telphone" />
<result property="qq" column="qq" />
<result property="email" column="email" />
<result property="img" column="img" />
<result property="isLeader" column="isLeader" />
<result property="sex" column="sex" />
<result property="idCard" column="idCard" />
<result property="summary" column="summary" />
<result property="nativePlacePro" column="nativePlacePro" />
<result property="nativePlaceCity" column="nativePlaceCity" />
<result property="address" column="address" />
<result property="addDate" column="addDate" />
<result property="moneys" column="moneys" />
</resultMap>
<!-- 用户登录，查询管理员用户名和密码是否存在 -->
<select id="getAdminUser" parameterType="java.util.Map" resultType="admin">
SELECT * from t_admin A
WHERE A.username = #{username} and A.password = #{password}
</select>
<!-- 查询管理员列表 -->
<select id="getAdminAll" resultMap="AdminResultMap" >
select DISTINCT id,userName,realName,telphone,lastLoginTime,lastLoginIP from t_Admin order by id
</select>
<!-- 查询管理员数目 -->
<select id="getAdminAllNum" resultType="java.lang.Integer" >
select count(*) from t_Admin
</select>
<!-- 修改密码 -->
<select id="modifyPassword" parameterType="java.util.Map" resultType="java.lang.Integer">
update t_admin set passoword = #{newpassword} where username = #{username}
</select>
<!-- 分页数据 -->
<select id="adminPageData" parameterType="java.lang.Integer" resultMap="AdminResultMap">
select top 8 * from t_admin where id not in (select top (8 * (#{curpage} - 1)) id from t_admin order by id) order by id
</select>
<!-- 根据用户名查找管理员信息 -->
<select id="getAdminUserInfo" parameterType="java.lang.String" resultType="admin">
select * from t_admin where username=#{username}
</select>
<!-- 修改密码 -->
<select id="updateAdminUser" parameterType="admin" resultType="java.lang.Integer">
update t_admin set password = #{password} , telphone=#{telphone},qq=#{qq} , email=#{email} where username = #{username}
</select>
</mapper>
1.映射的名称空间，就是接口的地址
<mapper namespace="com.hyd.carloan.business.merchant.admin.dao.AdminUserMapper">
2.返回的map结构，作为返回结果集
<resultMap type="Admin" id="AdminResultMap">
<id property="id" column="id" />
<result property="username" column="username" />
<result property="password" column="password" />
<result property="enable" column="enable" />
<result property="lastLoginTime" column="lastLoginTime" />
<result property="lastLoginIP" column="lastLoginIP" />
<result property="roleId" column="roleId" />
<result property="realName" column="realName" />
<result property="telphone" column="telphone" />
<result property="qq" column="qq" />
<result property="email" column="email" />
<result property="img" column="img" />
<result property="isLeader" column="isLeader" />
<result property="sex" column="sex" />
<result property="idCard" column="idCard" />
<result property="summary" column="summary" />
<result property="nativePlacePro" column="nativePlacePro" />
<result property="nativePlaceCity" column="nativePlaceCity" />
<result property="address" column="address" />
<result property="addDate" column="addDate" />
<result property="moneys" column="moneys" />
</resultMap>
3.设置参数的类型和返回值的类型
<!-- 用户登录，查询管理员用户名和密码是否存在 -->
<select id="getAdminUser" parameterType="java.util.Map" resultType="admin">
SELECT * from t_admin A
WHERE A.username = #{username} and A.password = #{password}
</select>
4.如果参数类型是Map结构的话，需要提前处理
public void modifyPassword(Admin adminUser) {
Map<String, Object> param = new HashMap<String, Object>();
param.put("username", adminUser.getUsername());
param.put("password", adminUser.getPassword());
param.put("newPassword", adminUser.getNewPassword());
this.adminUserMapper.modifyPassword(param);
}
原文：http://www.cnblogs.com/handsome1013/p/5209334.html