以下是idea2018辑编器
新建 Maven工程
1 file ->new ->project
新建后编程器在右下角加载插件。,这个时候需要会儿, 加载好后,软件目录会多一个ja包
类似于:
为了测试数据库,需要建一个表,
然后新建查询方式:
CREATE TABLE `user` (
`id` int(11) NOT NULL auto_increment,
`username` varchar(32) NOT NULL COMMENT '用户名称',
`birthday` datetime default NULL COMMENT '生日',
`sex` char(1) default NULL COMMENT '性别',
`address` varchar(256) default NULL COMMENT '地址',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
新建一个表,,在通过命令添加数据:
nsert into `user`(`id`,`username`,`birthday`,`sex`,`address`) values (41,'老王','2018-02-27 17:47:08','男','北京'),(42,'小二王','2018-03-02 15:09:37','女','北京金燕龙'),(43,'小二王','2018-03-04 11:34:34','女','北京金燕龙'),(45,'传智播客','2018-03-04 12:04:06','男','北京金燕龙'),(46,'老王','2018-03-07 17:37:26','男','北京'),(48,'小马宝莉','2018-03-08 11:44:00','女','北京修正');
然后通主包配置加载所需插件:
在pom.xml 中添加:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.itheima</groupId> <artifactId>day01_eesy_01mybatis</artifactId> <version>1.0-SNAPSHOT</version> <packaging>jar</packaging> <dependencies> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.5</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.6</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.12</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.10</version> </dependency> </dependencies> </project>
其中解释如下:
如此以后会自动安装上面所涉及到的包有工具库 以上前期工作完成
第二步
开始新建模型 orm 所谓模型就是给对象一样的字段 在src -main-java 中新建一个包 com.itheima-domain
在里面建一个类user
详细模型代码如下:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
1 package com.itheima.domain; 2 3 import java.io.Serializable; 4 import java.util.Date; 5 6 public class User implements Serializable { 7 private Integer id; 8 private String username; 9 private Date birthday; 10 private String sex; 11 private String address; 12 13 public Integer getId() { 14 return id; 15 } 16 17 public void setId(Integer id) { 18 this.id = id; 19 } 20 21 public String getUsername() { 22 return username; 23 } 24 25 public void setUsername(String username) { 26 this.username = username; 27 } 28 29 public Date getBirthday() { 30 return birthday; 31 } 32 33 public void setBirthday(Date birthday) { 34 this.birthday = birthday; 35 } 36 37 public String getSex() { 38 return sex; 39 } 40 41 public void setSex(String sex) { 42 this.sex = sex; 43 } 44 45 public String getAddress() { 46 return address; 47 } 48 49 public void setAddress(String address) { 50 this.address = address; 51 } 52 53 @Override 54 public String toString() { 55 return "User{" + 56 "id=" + id + 57 ", username='" + username + '\'' + 58 ", birthday=" + birthday + 59 ", sex='" + sex + '\'' + 60 ", address='" + address + '\'' + 61 '}'; 62 } 63 }
然后配置主配置,关于数据库和资源的
主配置文件内容如下:
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<?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> <!--主配置--> <environments default="mysql"> <environment id="mysql"> <transactionManager type="JDBC"></transactionManager> <dataSource type="POOLED"> <property name="driver" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql://localhost:3306/eesy"/> <property name="username" value="root"/> <property name="password" value="142857"/> </dataSource> </environment> </environments> <!--yanse--> <mappers> <mapper resource="com/itheima/dao/IUserDao.xml"/> </mappers> </configuration>