mybatis获取批量插入的主键自增id

一、写一个实体类

public class UserInfo {
    private long userId;
    private String userAccount;
    private String userPassword;
    private String userName;
    private int userStatus;
    private String userCreateDatetime;
    private String userRegisterIp;    public String getUserName() {
        return userName;
    }    public void setUserName(String userName) {
        this.userName = userName;
    }    public long getUserId() {
        return userId;
    }    public void setUserId(long userId) {
        this.userId = userId;
    }    public String getUserAccount() {
        return userAccount;
    }    public void setUserAccount(String userAccount) {
        this.userAccount = userAccount;
    }    public String getUserPassword() {
        return userPassword;
    }    public void setUserPassword(String userPassword) {
        this.userPassword = userPassword;
    }    public int getUserStatus() {
        return userStatus;
    }    public void setUserStatus(int userStatus) {
        this.userStatus = userStatus;
    }    public String getUserCreateDatetime() {
        return userCreateDatetime;
    }    public void setUserCreateDatetime(String userCreateDatetime) {
        this.userCreateDatetime = userCreateDatetime;
    }    public String getUserRegisterIp() {
        return userRegisterIp;
    }    public void setUserRegisterIp(String userRegisterIp) {
        this.userRegisterIp = userRegisterIp;
    }
}

二、插入的mybatis insert语句

<insert id="batchInsert" parameterType="list" keyProperty="userId" keyColumn="user_id" useGeneratedKeys="true">
      insert into system_user(
        user_account,
        user_password,
        user_name,
        user_status,
        user_create_datetime,
        user_register_ip
      ) values
        <foreach collection="list" item="item" index="index" separator=",">
            (
                #{item.userAccount},
                #{item.userPassword},
                #{item.userName},
                #{item.userStatus},
                #{item.userCreateDatetime},
                #{item.userRegisterIp}
            )
        </foreach>
    </insert>

三、dao接口

int batchInsert(List<UserInfo> data);

然后再遍历data list里面的UserInfo实例，发现属性userId已经赋值为自增的id的值

第二种方法，单参数是map的时候。参数不是一个实体。

<!-- 添加 -->
    <insert id="insert" parameterType="map" keyProperty="operlog_id" useGeneratedKeys="true">
        insert into system_oper_log
            (
                user_account,
                operlog_url,
                operlog_status,
                operlog_ip,
                operlog_exception,
                operlog_type,
                operlog_before,
                operlog_after
            )values(
                #{user_account},
                #{operlog_url},
                #{operlog_status},
                #{operlog_ip},
                #{operlog_exception},
                #{operlog_type},
                #{operlog_before},
                #{operlog_after}
            )
    </insert>

然后再返回的map参数里面，返现多了一个键，叫做operlog_id