最简单的mybatis增删改查样例-优快云博客

本文提供了一个使用 MyBatis 框架实现书籍增删改查操作的简单示例，包括配置文件设置、Mapper 文件定义 SQL 语句及 Java 应用调用等关键步骤。

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最简单的mybatis增删改查样例
Book.java


package com.bookstore.app;

import java.io.Serializable;

public class Book implements Serializable {

	private static final long serialVersionUID = 233559895466038160L;
	private String isbn;
	private String name;
	private String price;

	public String getIsbn() {
		return isbn;
	}

	public void setIsbn(String isbn) {
		this.isbn = isbn;
	}

	public String getPrice() {
		return price;
	}

	public void setPrice(String price) {
		this.price = price;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getName() {
		return name;
	}
@Override
	public String toString() {
		return "BookName: " + this.name + ", price: " + this.price;
	}

}

mybatis-config.xml


<?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>
    <settings>
        <setting name="lazyLoadingEnabled" value="false" />
    </settings>

    <typeAliases>
        <typeAlias alias="Book" type="com.bookstore.app.Book" />
    </typeAliases>

    <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/mybatis" />
                <property name="username" value="root" />
                <property name="password" value="root" />
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <mapper resource="com/bookstore/config/bookMapper.xml" />
    </mappers>
</configuration>

bookMapper.xml


<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" 
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.bookstore.app.bookMapper">
	<select id="getBookByName" resultType="Book" parameterType="string">
		select *
		from book
		where name=#{name}
	</select>
	<insert id="insertBook" parameterType="Book">
		insert into book(isbn, name, price)
		value(#{isbn}, #{name}, #{price})
	</insert>
	<update id="updateBook" parameterType="Book">
		update book 
		set
		name=#{name},
		price=#{price}
		where isbn=#{isbn}
	</update>
	<delete id="deleteBook" parameterType="String">
		delete from book where name=#{name}		
	</delete>
</mapper>

BookApp.java


package com.bookstore.app;

import java.io.IOException;
import java.io.Reader;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

public class BookApp {
	public static void main(String[] args) throws IOException {
		String resource = "com/bookstore/config/mybatis-config.xml";
		Reader reader = Resources.getResourceAsReader(resource);
		SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder()
				.build(reader);
		SqlSession session = sessionFactory.openSession();
		//查询
		Book book = (Book) session.selectOne(
				"com.bookstore.app.bookMapper.getBookByName", "Spring In Action");
		System.out.println(book.toString());
		//修改
		book.setName("Spring In Action 2ed Edition");
		book.setPrice("59");
		session.update("com.bookstore.app.bookMapper.updateBook", book);
		//插入
		Book newBook = new Book();
		newBook.setIsbn("ISBN978-7-121-10577-7");
		newBook.setName("人人都是产品经理");
		newBook.setPrice("45");
		session.insert("com.bookstore.app.bookMapper.insertBook", newBook);
		//删除
		session.delete("com.bookstore.app.bookMapper.deleteBook", "Struts In Action");
		session.commit();
	}
}