/*
Navicat Premium Data Transfer
Source Server : localhost_3306
Source Server Type : MySQL
Source Server Version : 50722
Source Host : localhost:3306
Source Schema : mybatis01
Target Server Type : MySQL
Target Server Version : 50722
File Encoding : 65001
Date: 04/07/2018 11:08:15
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '用户名称',
`birthday` date NULL DEFAULT NULL COMMENT '生日',
`sex` char(1) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '性别',
`address` varchar(256) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '地址',
PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 33 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES (1, '王五', NULL, '2', NULL);
INSERT INTO `user` VALUES (10, '张三', '2014-07-10', '1', '北京市');
INSERT INTO `user` VALUES (16, '张小明', NULL, '1', '河南郑州');
INSERT INTO `user` VALUES (22, '陈小明', NULL, '1', '河南郑州');
INSERT INTO `user` VALUES (24, '张三丰', NULL, '1', '河南郑州');
INSERT INTO `user` VALUES (25, '陈小明', NULL, '1', '河南郑州');
INSERT INTO `user` VALUES (26, '王五', NULL, NULL, NULL);
INSERT INTO `user` VALUES (28, '赵四', '2018-07-02', '1', '福建');
INSERT INTO `user` VALUES (29, '老王', '2018-07-02', '1', '福建');
INSERT INTO `user` VALUES (31, '小王', '2018-07-02', '1', '福建');
INSERT INTO `user` VALUES (32, '小王', '2018-07-02', '1', '福建');
SET FOREIGN_KEY_CHECKS = 1;
orders.sql：
/*
Navicat Premium Data Transfer
Source Server : localhost_3306
Source Server Type : MySQL
Source Server Version : 50722
Source Host : localhost:3306
Source Schema : mybatis01
Target Server Type : MySQL
Target Server Version : 50722
File Encoding : 65001
Date: 04/07/2018 11:19:10
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for orders
-- ----------------------------
DROP TABLE IF EXISTS `orders`;
CREATE TABLE `orders` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`user_id` int(11) NOT NULL COMMENT '下单用户id',
`number` varchar(32) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '订单号',
`createtime` datetime(0) NOT NULL COMMENT '创建订单时间',
`note` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '备注',
PRIMARY KEY (`id`) USING BTREE,
INDEX `FK_orders_1`(`user_id`) USING BTREE,
CONSTRAINT `FK_orders_id` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE = InnoDB AUTO_INCREMENT = 6 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
-- ----------------------------
-- Records of orders
-- ----------------------------
INSERT INTO `orders` VALUES (3, 1, '1000010', '2015-02-04 13:22:35', NULL);
INSERT INTO `orders` VALUES (4, 1, '1000011', '2015-02-03 13:22:41', NULL);
INSERT INTO `orders` VALUES (5, 10, '1000012', '2015-02-12 16:13:23', NULL);
SET FOREIGN_KEY_CHECKS = 1;
步骤一：generatorConfig.xml 配置文件的编写
注意以下要点：
1、添加要生成的数据库表
2、生成 pojo 文件所要存放包的路径
3、生成mapper 文件所要存放包的路径
generatorConfig.xml：
步骤二：使用 java 类生成 mapper文件
StartServer.java：
package generator;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;
public class StartServer {
public void generator() throws Exception{
List warnings = new ArrayList();
boolean overwrite = true;
File configFile = new File("generator.xml");
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(configFile);
DefaultShellCallback callback = new DefaultShellCallback(overwrite);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,
callback, warnings);
myBatisGenerator.generate(null);
}
public static void main(String[] args) throws Exception {
try {
StartServer startServer = new StartServer();
startServer.generator();
} catch (Exception e) {
e.printStackTrace();
}
}
}
当某个数据库用户在数据库中插入、更新、删除一个表的数据，或者增加一个表的主键时或者表的索引时，常常会出现ora-00054:resource busy and acquire with nowait specified这样的错误。主要是因为有事务正在执行（或者事务已经被锁），所有导致执行不成功。
1.下面的语句
insert提示IGNORE_ROW_ON_DUPKEY_INDEX
转自：http://space.itpub.net/18922393/viewspace-752123
在 insert into tablea ...select * from tableb中，如果存在唯一约束，会导致整个insert操作失败。使用IGNORE_ROW_ON_DUPKEY_INDEX提示，会忽略唯一
1.记录慢查询配置
show variables where variable_name like 'slow%' ; --查看默认日志路径
查询结果：--不用的机器可能不同
slow_query_log_file=/var/lib/mysql/centos-slow.log
修改mysqld配置文件：/usr /my.cnf[一般在/etc/my.cnf，本机在/user/my.cn
@ControllerAdvice，是spring3.2提供的新注解，从名字上可以看出大体意思是控制器增强。让我们先看看@ControllerAdvice的实现：
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Component
public @interface Co
BW Element
OLAP Universe Element
Cube Dimension
Class
Charateristic
A class with dimension and detail objects (Detail objects for key and desription)
Hi
