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SSM-CRUD整合之道

资源准备

编译器下载
https://www.jetbrains.com/

maven 官网
http://maven.apache.org/download.cgi

maven 仓库
http://mvnrepository.com/

XAMPP 官网
https://www.apachefriends.org/zh_cn/download.html

SSM 概要

        Spring        //业务层框架
        Spring MVC    //开发web程序应用的模块model+view+controller 
        Mybatis        //持久化。jdbc，mysql    
        
        SSM编程，即SpringMVC+Spring+MyBatis整合，是当前最为流行的JavaEE开发技术架构。
其实SSM整合的实质，仅仅就是将MyBatis整合入Spring。
因为SpringMVC原本就是Spring的一部分，不用专门整合。
SSM整合的实现方式可分为两种：基于XML配置方式，基于注解方式。

数据库准备

--
-- 数据库： `mybatis`
--

-- --------------------------------------------------------

--
-- 表的结构 `users`
--

CREATE TABLE `users` (
  `id` int(11) NOT NULL,
  `name` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL,
  `age` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

总体的结构图

第1步 创建工程

第2步 添加模块

第3步 模块名称

第4步 添加maven 也许一般都安装了 可是我的没有就多处这一步 自己查看即可

第5步

<?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.shanghai.wanson</groupId>
    <artifactId>mybatisdemo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <!-- 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>8.0.11</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/junit/junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>

    </dependencies>
    
</project>

第6步 添加依赖包 mysql 和junit

<?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.shanghai.wanson</groupId>
    <artifactId>mybatisdemo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <!-- 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>8.0.11</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/junit/junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>

    </dependencies>
    
</project>

第7步 添加mybatis 依赖包

<?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.shanghai.wanson</groupId>
    <artifactId>mybatisdemo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <!-- 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>8.0.11</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/junit/junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>

    </dependencies>
    
</project>

第8步 在resources文件中添加mybatis-config.xml配置文件

第9步 在resources文件中修改mybatis-config.xml配置文件

<?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="driver" value="com.mysql.cj.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=Hongkong"/>
                <property name="username" value="root"/>
                <property name="password" value="root"/>
            </dataSource>
        </environment>
    </environments>

    <!--把UserMapper.xml引入mybatis-config.xml  也就是形成映射-->
    <mappers>
        <mapper resource="UserMapper.xml"/>
    </mappers>
</configuration>

第10步 创建数据库名为mybatis 表名为users

第11步

第12步

第13步

第14步 添加User.java 主要跟数据库表字段一致即可

package com.shanghai.wanson.domain;
/*
编写mapper文件。
a）创建User类，和users对应

b）创建UserMapper.xml

 */
public class User {
    private Integer id;
    private String name;
    private int age;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

第15步

第16步 UserMapper.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="users"> <!--名字空间一般用表名 即可-->
    <insert id="insert">
        insert into users(name,age) values (#{name},#{age})
    </insert>
</mapper>

第17步

<?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="driver" value="com.mysql.cj.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=Hongkong"/>
                <property name="username" value="root"/>
                <property name="password" value="root"/>
            </dataSource>
        </environment>
    </environments>

    <!--把UserMapper.xml引入mybatis-config.xml  也就是形成映射-->
    <mappers>
        <mapper resource="UserMapper.xml"/>
    </mappers>
</configuration>

第18步

<?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="driver" value="com.mysql.cj.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=Hongkong"/>
                <property name="username" value="root"/>
                <property name="password" value="root"/>
            </dataSource>
        </environment>
    </environments>

    <!--把UserMapper.xml引入mybatis-config.xml  也就是形成映射-->
    <mappers>
        <mapper resource="UserMapper.xml"/>
    </mappers>
</configuration>

第19步 修改App.java

package com.shanghai.wanson;

import com.shanghai.wanson.domain.User;
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 java.io.IOException;
import java.io.InputStream;

public class App {
    public static void main(String[] args) {

        try {
            //指定配置文件的路径(类路径)
            String resource = "mybatis-config.xml";
            //加载文件  形成资源
            InputStream inputStream = Resources.getResourceAsStream(resource);
            //创建会话工厂Builder，相当于连接池
            SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

            //通过sf开启会话，相当于打开连接
            SqlSession sqlSession=sqlSessionFactory.openSession();
            //System.out.println(sqlSession);
            User u=new User();
            u.setName("wanson");
            u.setAge(18);

            sqlSession.insert("users.insert",u);
            sqlSession.commit();
            sqlSession.close();

        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

posted on 2018-08-11 22:22  Indian_Mysore  阅读(117)  评论(0)  编辑  收藏  举报

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