Organize notes mybatis

The following is an editing of idea2018

New Maven Project

1  file ->new ->project               

 

        Programmer load the plug at the bottom right after New. This time need a moment, after loading good software package directories will be one more ja 

It looks like this:

   

 

To test the database, we need to build a table,   

  Then the new query:

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;

 

Adding a new data table ,, command:

nsert into `user` (` id`, `username`,` birthday`, `sex`,` address`) values ​​(41, 'Wang', '2018-02-27 17:47:08', 'M ',' Beijing '), (42,' small two kings ',' 2018-03-02 15:09:37 ',' female ',' Beijing Jinyan Long '), (43,' small two kings ',' 2018 -03-04 11:34:34 ',' female ',' Beijing Jinyan Long '), (45,' Chi Chuan podcast ',' 2018-03-04 12:04:06 ',' male ',' Beijing Jinyan Long '), (46,' Pharaoh ',' 2018-03-07 17:37:26 ',' male ',' Beijing '), (48,' small Ma Baoli ',' 2018-03-08 11:44 : 00 ',' female ',' Beijing amendment ');

 

Then through the main load the required plug-Package Configuration:

Add in pom.xml:　　

<?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>

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Which is explained as follows:

 

So the future will automatically install the above involved more than the completion of the preliminary work tool library

 

The second step

Orm start a new model called the object model is to give the same field in src -main-java in a new package com.itheima-domain

Built inside a class user

A detailed model code is as follows:

 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 }

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Then configure the primary configuration, databases and resources

The main configuration file as follows:

<?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>

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