第一步:创建新项目,按图如下:
接下来:
接下来照着填:
接下来:下一步,下一步,一直到创建:
创建完成。
后续:
第一步:修改maven项目中的pom.xml文件
代码如下:
<?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.zit</groupId>
<artifactId>mybatis01</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>mybatis01</name>
<dependencies>
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.12</version>
</dependency>
</dependencies>
<build>
<finalName>${project.artifactId}</finalName>
<testSourceDirectory>src/test/java</testSourceDirectory>
<sourceDirectory>src/main/java</sourceDirectory>
<!-- 解决无法加载资源配置文件 -->
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
<include>**/*.properties</include>
</includes>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.xml</include>
<include>**/*.properties</include>
</includes>
</resource>
</resources>
</build>
</project>
项目有问题暂时不用担心,接着往下进行。
把左边的项目结构变成如下:
然后pom.xml恢复正常。
接下来:
在项目src/main/resources/mybatis-config.xml中输入代码:
<?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>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/dt_game?usrSSL=false&serverTimezone=PRC"/>
<property name="username" value="root"/>
<property name="password" value=""/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper class="com.fz.mapper.StudentMapper"/>
</mappers>
</configuration>
上面有和数据库相连的信息,注意和自己的数据库一一对应。
数据库信息
localhost db student root 3306
数据库名称为 db 账号 root 密码 端口3306 表数据信息
mysql> select * from student;
+--------+--------+-------+------------------+
| id | name | score | address |
+--------+--------+-------+------------------+
| 201601 | 李四 | 90 | 郑州市文化路68号 |
| 201602 | 张三丰 | 30 | 郑州市东风路68号 |
+--------+--------+-------+------------------+
2 rows in set (0.01 sec)
配置就算简单完成了。
简单实验:
需要三个文件:
第一:src/main/java/com/zit/entity/建立Book.java,代码:
package com.zit.entity;
import java.math.BigDecimal;
import java.util.Date;
public class Book {
private int id;
private String name;
private BigDecimal price;
private Date btime;
public Book() {
}
public Book(int id, String name, BigDecimal price, Date btime) {
this.id = id;
this.name = name;
this.price = price;
this.btime = btime;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public BigDecimal getPrice() {
return price;
}
public void setPrice(BigDecimal price) {
this.price = price;
}
public Date getBtime() {
return btime;
}
public void setBtime(Date btime) {
this.btime = btime;
}
}
第二:src/main/java/com/zit/mapper/目录下建立接口BookMapper代码如下:
package com.zit.mapper;
import com.zit.entity.Book;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import java.util.List;
public interface BookMapper {
@Insert("insert into book values(null,#{name},#{price},#{btime})")
public int save(Book book);
@Select("select * from book")
public List<Book> queryAll();
@Delete("delete from book where id=#{id}")
public int deleteById(int id);
}
第三:src/main/resources/conf.xml文件相应的修改如下:
<?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>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/dt_game?usrSSL=false&serverTimezone=PRC"/>
<property name="username" value="root"/>
<property name="password" value=""/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper class="com.zit.mapper.BookMapper"/>
</mappers>
</configuration>
最后在:src/main/test/java/目录下新建Demo.java文件:
代码如下:
import com.zit.entity.Book;
import com.zit.mapper.BookMapper;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.io.IOException;
import java.io.Reader;
import java.math.BigDecimal;
import java.util.Date;
import java.util.List;
public class Demo {
protected SqlSessionFactory sf;
protected SqlSession session;
protected BookMapper bdao;
@Before
public void init() {
System.out.println(3333);
try {
System.out.println("hello");
Reader reader = Resources.getResourceAsReader("conf.xml");
sf = new SqlSessionFactoryBuilder().build(reader);
session = sf.openSession();
bdao = session.getMapper(BookMapper.class);
} catch (Exception e) {
e.printStackTrace();
}
}
@After
public void close(){
session.commit();
}
@Test
public void query() {
System.out.println(33);
List<Book> bks = bdao.queryAll();
for (Book b : bks) {
System.out.println(b.getName());
}
}
@Test
public void add() {
Book bk = new Book();
bk.setName("《web开发集合》");
bk.setPrice(new BigDecimal(80));
bk.setBtime(new Date());
bdao.save(bk);
}
@Test
public void del(){
bdao.deleteById(3);
}
}
单个测试,都是可以成功的,完成
目录结构不清楚的看下图: