Mybatis在插入单条数据的时候有两种方式返回自增主键: mybatis3.3.1支持批量插入后返回主键ID,
首先对于支持自增主键的数据库:useGenerateKeys和keyProperty。
不支持生成自增主键的数据库:<selectKey>。
这里主要说下批量插入数据时如何返回主键ID(注意要将mybatis升到3.3.1)
public class UserInfo
{
private int userId;
private String userName;
private StringuserPwd;
public long getUserId() {
return userId;
}
public void setUserId(long userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserPwd() {
return userPwd;
}
public void setUserPwd(String userPwd) {
this.userPwd = userPwd;
}
}
Dao
public interface UserDao{
int insertTest(List<UserInfo> userInfo);
}
mapper
<insert id="insertTest" parameterType="java.util.List" useGeneratedKeys="true" keyProperty="userId">
insert into t_sys_course (user_name,user_pwd)
values
<foreach collection="list" item="item" index="index"
separator=",">
(#{item.userName,jdbcType=VARCHAR},#{item.userPwd,jdbcType=VARCHAR})
</foreach>
</insert>
serviceImpl
public List<UserInfo> saveCheckin(List<UserInfo> userInfo) {
userDao.insertCheckin(userInfo);
return userInfo;
}
//返回的对象List里面已经包含主键ID