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4.SpringBoot-MyBatis踩坑.md

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---------------SpringBoot-MyBatis踩坑记录---------------

2020/10/5. MyBatis 需要手动建数据和表，对于 why_home_MyBatis 项目，建表语句如下：

/*
 Navicat MySQL Data Transfer

 Source Server         : myblog-localhost
 Source Server Type    : MySQL
 Source Server Version : 50717
 Source Host           : localhost:3306
 Source Schema         : myblog

 Target Server Type    : MySQL
 Target Server Version : 50717
 File Encoding         : 65001

 Date: 30/04/2020 17:02:10
*/

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for t_blog
-- ----------------------------
DROP TABLE IF EXISTS `t_blog`;
CREATE TABLE `t_blog`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `appreciation` bit(1) NOT NULL,
  `commentabled` bit(1) NOT NULL,
  `content` longtext CHARACTER SET utf8 COLLATE utf8_general_ci NULL,
  `create_time` datetime(0) NULL DEFAULT NULL,
  `description` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `first_picture` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `flag` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `published` bit(1) NOT NULL,
  `recommend` bit(1) NOT NULL,
  `share_statement` bit(1) NOT NULL,
  `title` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `update_time` datetime(0) NULL DEFAULT NULL,
  `views` int(11) NULL DEFAULT NULL,
  `type_id` bigint(20) NULL DEFAULT NULL,
  `user_id` bigint(20) NULL DEFAULT NULL,
  `comment_count` int(255) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE,
  INDEX `FK292449gwg5yf7ocdlmswv9w4j`(`type_id`) USING BTREE,
  INDEX `FK8ky5rrsxh01nkhctmo7d48p82`(`user_id`) USING BTREE,
  CONSTRAINT `FK292449gwg5yf7ocdlmswv9w4j` FOREIGN KEY (`type_id`) REFERENCES `t_type` (`id`) ON DELETE RESTRICT ON UPDATE RESTRICT,
  CONSTRAINT `FK8ky5rrsxh01nkhctmo7d48p82` FOREIGN KEY (`user_id`) REFERENCES `t_user` (`id`) ON DELETE RESTRICT ON UPDATE RESTRICT
) ENGINE = InnoDB AUTO_INCREMENT = 62 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for t_comment
-- ----------------------------
DROP TABLE IF EXISTS `t_comment`;
CREATE TABLE `t_comment`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `nickname` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `email` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `content` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `avatar` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `create_time` datetime(0) NULL DEFAULT NULL,
  `blog_id` bigint(20) NULL DEFAULT NULL,
  `parent_comment_id` bigint(20) NULL DEFAULT NULL,
  `admin_comment` bit(1) NOT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 28 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for t_friend
-- ----------------------------
DROP TABLE IF EXISTS `t_friend`;
CREATE TABLE `t_friend`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `blogaddress` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  `blogname` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  `create_time` datetime(0) NULL DEFAULT NULL,
  `pictureaddress` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 58 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for t_message
-- ----------------------------
DROP TABLE IF EXISTS `t_message`;
CREATE TABLE `t_message`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `nickname` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `email` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `content` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `avatar` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `create_time` datetime(0) NULL DEFAULT NULL,
  `parent_message_id` bigint(20) NULL DEFAULT NULL,
  `admin_message` bit(1) NOT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 100 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for t_picture
-- ----------------------------
DROP TABLE IF EXISTS `t_picture`;
CREATE TABLE `t_picture`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `pictureaddress` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `picturedescription` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `picturename` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `picturetime` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 19 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for t_type
-- ----------------------------
DROP TABLE IF EXISTS `t_type`;
CREATE TABLE `t_type`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 58 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for t_user
-- ----------------------------
DROP TABLE IF EXISTS `t_user`;
CREATE TABLE `t_user`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `avatar` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `create_time` datetime(0) NULL DEFAULT NULL,
  `email` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `nickname` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `password` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `type` int(11) NULL DEFAULT NULL,
  `update_time` datetime(0) NULL DEFAULT NULL,
  `username` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 2 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

SET FOREIGN_KEY_CHECKS = 1;

对于自己的 why_home_MyBatis 项目，建表语句如下：

/*
 Navicat MySQL Data Transfer

 Source Server         : why-home-localhost
 Source Server Type    : MySQL
 Source Server Version : 50717
 Source Host           : localhost:3306
 Source Schema         : why-home

 Target Server Type    : MySQL
 Target Server Version : 50717
 File Encoding         : 65001

 Date: 05/10/2020 22:02:10
*/

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for home_blog
-- ----------------------------
DROP TABLE IF EXISTS `home_blog`;
CREATE TABLE `home_blog`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `title` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `content` longtext CHARACTER SET utf8 COLLATE utf8_general_ci NULL,
  `description` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `topPicture` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `flag` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `views` int(11) NULL DEFAULT NULL,
  
  `shareOpening` bit(1) NOT NULL,
  `commentOpening` bit(1) NOT NULL,
  `appreciationOpening` bit(1) NOT NULL,
  `publishOpening` bit(1) NOT NULL,
  `recommendOpening` bit(1) NOT NULL,
  
  `createTime` datetime(0) NULL DEFAULT NULL,
  `updateTime` datetime(0) NULL DEFAULT NULL,
  
  `type_id` bigint(20) NULL DEFAULT NULL,
  `user_id` bigint(20) NULL DEFAULT NULL,
  `comment_count` int(255) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE,
  INDEX `FK292449gwg5yf7ocdlmswv9w4j`(`type_id`) USING BTREE,
  INDEX `FK8ky5rrsxh01nkhctmo7d48p82`(`user_id`) USING BTREE,
  CONSTRAINT `FK292449gwg5yf7ocdlmswv9w4j` FOREIGN KEY (`type_id`) REFERENCES `t_type` (`id`) ON DELETE RESTRICT ON UPDATE RESTRICT,
  CONSTRAINT `FK8ky5rrsxh01nkhctmo7d48p82` FOREIGN KEY (`user_id`) REFERENCES `t_user` (`id`) ON DELETE RESTRICT ON UPDATE RESTRICT
) ENGINE = InnoDB AUTO_INCREMENT = 62 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for home_comment
-- ----------------------------
DROP TABLE IF EXISTS `home_comment`;
CREATE TABLE `home_comment`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `nickname` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `email` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `content` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `avatar` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `adminComment` bit(1) NOT NULL,
  `createTime` datetime(0) NULL DEFAULT NULL,
  
  `blog_id` bigint(20) NULL DEFAULT NULL,
  `parentComment_id` bigint(20) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 28 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for home_type
-- ----------------------------
DROP TABLE IF EXISTS `home_type`;
CREATE TABLE `home_type`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 58 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for home_tag
-- ----------------------------
DROP TABLE IF EXISTS `home_tag`;
CREATE TABLE `home_tag`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 58 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for home_user
-- ----------------------------
DROP TABLE IF EXISTS `home_user`;
CREATE TABLE `home_user`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `avatar` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `email` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `nickname` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `password` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `type` int(11) NULL DEFAULT NULL,
  `username` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `createTime` datetime(0) NULL DEFAULT NULL,
  `updateTime` datetime(0) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 2 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

SET FOREIGN_KEY_CHECKS = 1;

重新：

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for t_blog
-- ----------------------------
DROP TABLE IF EXISTS `t_blog`;
CREATE TABLE `t_blog`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `content` longtext CHARACTER SET utf8 COLLATE utf8_general_ci NULL,
  `description` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `first_picture` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `views` int(11) NULL DEFAULT NULL,
  
  `flag` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `appreciation` bit(1) NOT NULL,
  `commentabled` bit(1) NOT NULL,
  `published` bit(1) NOT NULL,
  `recommend` bit(1) NOT NULL,
  `title` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `create_time` datetime(0) NULL DEFAULT NULL,
  `update_time` datetime(0) NULL DEFAULT NULL,

  `type_id` bigint(20) NULL DEFAULT NULL,
  `user_id` bigint(20) NULL DEFAULT NULL,
  `comment_count` int(255) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE,
  INDEX `FK292449gwg5yf7ocdlmswv9w4j`(`type_id`) USING BTREE,
  INDEX `FK8ky5rrsxh01nkhctmo7d48p82`(`user_id`) USING BTREE,
  CONSTRAINT `FK292449gwg5yf7ocdlmswv9w4j` FOREIGN KEY (`type_id`) REFERENCES `t_type` (`id`) ON DELETE RESTRICT ON UPDATE RESTRICT,
  CONSTRAINT `FK8ky5rrsxh01nkhctmo7d48p82` FOREIGN KEY (`user_id`) REFERENCES `t_user` (`id`) ON DELETE RESTRICT ON UPDATE RESTRICT
) ENGINE = InnoDB AUTO_INCREMENT = 62 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for t_comment
-- ----------------------------
DROP TABLE IF EXISTS `t_comment`;
CREATE TABLE `t_comment`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `nickname` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `email` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `content` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `avatar` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  
  `create_time` datetime(0) NULL DEFAULT NULL,
  `blog_id` bigint(20) NULL DEFAULT NULL,
  `parent_comment_id` bigint(20) NULL DEFAULT NULL,
  `admin_comment` bit(1) NOT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 28 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for t_type
-- ----------------------------
DROP TABLE IF EXISTS `t_type`;
CREATE TABLE `t_type`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 58 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for t_tag
-- ----------------------------
DROP TABLE IF EXISTS `t_tag`;
CREATE TABLE `t_tag`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  
  `blog_id` bigint(20) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 58 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;


-- ----------------------------
-- Table structure for t_user
-- ----------------------------
DROP TABLE IF EXISTS `t_user`;
CREATE TABLE `t_user`  (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `username` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `avatar` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `email` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `nickname` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `password` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `type` int(11) NULL DEFAULT NULL,
  
  `create_time` datetime(0) NULL DEFAULT NULL,
  `update_time` datetime(0) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 2 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

SET FOREIGN_KEY_CHECKS = 1;

建立Blog、Tag多对多关系表:

SET FOREIGN_KEY_CHECKS = 0;
CREATE TABLE `t_blog_tag`  (
  `blog_id` bigint(20) NOT NULL,
  `tag_id` bigint(20) NOT NULL,
  PRIMARY KEY (`blog_id`, `tag_id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 2 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
SET FOREIGN_KEY_CHECKS = 1;