2021-07-27初识SSM框架1

1.applicationContext.xml添加配置

<!--加载属性文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>
<!--mybatis交给spring来管理，所以他的配置写在下面 -->
    <!--配置数据源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.pro.dao"/>
    </bean>

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2.连接数据库 jdbcproperties.xml

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/class8
jdbc.username=root
jdbc.password=12345678

---

3.添加实体类

package com.pro.domain;

public class Xx {
    private Integer id;
    private String content;

    public Xx() {
    }

    public Xx(String content) {
        this.content = content;
    }

    @Override
    public String toString() {
        return "Xx{" +
                "id=" + id +
                ", content='" + content + '\'' +
                '}';
    }

    public Integer getId() {
        return id;
    }

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

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }
}

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4.添加XxDao接口

package com.pro.dao;

import com.pro.domain.Xx;

public interface XxDao {
    public void insertXx(Xx xx);
}

---

5.xxDao.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.pro.dao.XxDao">
  <insert id="insertXx" parameterType="xx">
      insert into xx(content) values (#{content})
  </insert>

</mapper>

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6.XxService接口

package com.pro.service;

import com.pro.domain.Xx;

public interface XxService {
    public void save(Xx xx);
}

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7.XxServiceImpl

package com.pro.service;

import com.pro.dao.XxDao;
import com.pro.domain.Xx;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class XxServiceImpl implements XxService {

    @Autowired
    private XxDao xxDao;

    @Override
    public void save(Xx xx) {
        xxDao.insertXx(xx);
    }
}

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8.XxTest.java

import com.pro.domain.Xx;
import com.pro.service.XxService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:applicationContext.xml"})
public class XxServiceTest {

    @Autowired
    private XxService xxService;

    @Test
    public void save() {
        xxService.save(new Xx("nmnmnmnm"));
    }
}

---

添加成功