05_ssm基础之Spring与持久层的整合

Posted 2020-11-07 姿势帝

30.31.spring对jdbc的支持jdbcTemplate

　　

　　使用Spring的JDBC准备:
  1):拷贝jar:
       mysql-connector-java-5.1.11.jar:MySQL驱动包
       spring-jdbc-4.1.2.RELEASE.jar:支持JDBC
       spring-tx-4.1.2.RELEASE.jar: 支持事务
  2): 操作Product对象的DAO实现:
  3):参考文档:参考Spring4.x文档的362页.

   代码：如下

 　　 spring配置文件代码

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4        xmlns:context="http://www.springframework.org/schema/context"
 5        xsi:schemaLocation="http://www.springframework.org/schema/beans
 6         http://www.springframework.org/schema/beans/spring-beans.xsd
 7          http://www.springframework.org/schema/context
 8           http://www.springframework.org/schema/context/spring-context.xsd">
 9     <!--  读取配置文件-->
10     <context:property-placeholder location="classpath:db.properties"/>
11     <!--配置dataSources-->
12     <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
13         <property name="driverClassName" value="${mysql.driverClass}"/>
14         <property name="url" value="${mysql.JdbcUrl}"/>
15         <property name="username" value="${mysql.User}"/>
16         <property name="password" value="${mysql.Password}"/>
17     </bean>
18 
19     <bean id="product2Dao" class="com.day02.ssm.spring.dao.impl.Product2Dao">
20         <property name="dataSource" ref="dataSource"/>
21     </bean>
22 </beans>

View Code

 

　　　dao是实现代码：

 1 package com.day02.ssm.spring.dao.impl;
 2 
 3 import com.day02.ssm.spring.dao.IProductDao;
 4 import com.day02.ssm.spring.model.Product;
 5 import org.apache.commons.dbcp.BasicDataSource;
 6 import org.springframework.beans.factory.annotation.Autowired;
 7 import org.springframework.jdbc.core.JdbcTemplate;
 8 import org.springframework.jdbc.core.RowMapper;
 9 
10 import javax.sql.DataSource;
11 import java.sql.Connection;
12 import java.sql.PreparedStatement;
13 import java.sql.ResultSet;
14 import java.sql.SQLException;
15 
16 /**
17  * 课程笔记:http://www.cnblogs.com/newAndHui/category/1153640.html
18  * 疑问咨询wx:851298348
19  */
20 public class Product2Dao implements IProductDao {
21     private JdbcTemplate jdbcTemplate;
22 
23 
24     public void setDataSource(DataSource dataSource) {
25         this.jdbcTemplate = new JdbcTemplate(dataSource);
26     }
27 
28     @Override
29     public void save(Product product)  {
30         String sql = "INSERT INTO product (product_name,sale_price) VALUES (?,?)";
31         this.jdbcTemplate.update(sql,product.getProductName(),product.getSalePrice());
32     }
33 
34     @Override
35     public void delete(int id) {
36         String sql="DELETE FROM product WHERE id=?";
37         this.jdbcTemplate.update(sql,id);
38 
39     }
40 
41     @Override
42     public void update(Product product) {
43        String sql="UPDATE product SET sale_price=? WHERE id=?";
44         this.jdbcTemplate.update(sql,product.getSalePrice(),product.getId());
45     }
46 
47     @Override
48     public Product query(int id) {
49         String sql="SELECT id,product_name,sale_price FROM product WHERE id=?";
50         Product product = this.jdbcTemplate.queryForObject(sql, new Object[]{id}, new RowMapper<Product>() {
51                                     public Product mapRow(ResultSet rs, int rowNum) throws SQLException {
52                                         Product product = new Product();
53                                         product.setId(rs.getInt("id"));
54                                         product.setProductName(rs.getString("product_name"));
55                                         product.setSalePrice(rs.getInt("sale_price"));
56                                         return product;
57                                     }
58                                 });
59         return product;
60     }
61 }

Product2Dao

 

　　dao测试代码

 1 package com.day02.ssm.spring.test;
 2 
 3 import com.day02.ssm.spring.dao.impl.Product2Dao;
 4 import com.day02.ssm.spring.model.Product;
 5 import org.junit.Test;
 6 import org.junit.runner.RunWith;
 7 import org.springframework.beans.factory.annotation.Autowired;
 8 import org.springframework.test.context.ContextConfiguration;
 9 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
10 
11 /**
12  * 课程笔记:http://www.cnblogs.com/newAndHui/category/1153640.html
13  * 疑问咨询wx:851298348
14  */
15 @RunWith(SpringJUnit4ClassRunner.class)//把junit加载到spring容器中去
16 @ContextConfiguration("classpath:spring-config_jdbcTemplat.xml")
17 public class TestProduct2Dao {
18 
19     // private ProductDao productDao=new ProductDao();
20     @Autowired
21     private Product2Dao productDao;//从spring中获取dao对象
22 
23     @Test
24     public void test() {
25         Product product = new Product();
26         product.setProductName("苹果22");
27         product.setSalePrice(892);
28         productDao.save(product);
29     }
30     @Test
31     public void testDelete() {
32        productDao.delete(24);
33     }
34 
35     @Test
36     public void testUpdate() {
37         Product product = new Product();
38         product.setId(23);
39         product.setSalePrice(1000);
40         productDao.update(product);
41     }
42     @Test
43     public void testQuery() {
44         Product query = productDao.query(23);
45         System.out.println("query="+query);
46     }
47 
48 }

TestProduct2Dao

 

32.spring对jdbc的支持jdbcTemplate之继承方式

　　注意：和上面原理一样,只是写法不一样

　　

33.spring与mybatis集成方案1

　　依赖包:

　　

　　xml文件配置:

　　

　　映射文件:

　　

　　dao实现:

　　

34.spring与mybatis整合方案2(不写实现类)

　　

34.spring与mybatis整合方案3(终极生产版本)

　　

　　　spring与mybatis整合终极版本代码:

　　　　整合的xml文件

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4        xmlns:context="http://www.springframework.org/schema/context"
 5        xsi:schemaLocation="http://www.springframework.org/schema/beans
 6         http://www.springframework.org/schema/beans/spring-beans.xsd
 7          http://www.springframework.org/schema/context
 8           http://www.springframework.org/schema/context/spring-context.xsd">
 9     <!--  读取配置文件-->
10     <context:property-placeholder location="classpath:db.properties"/>
11     <!--配置dataSources-->
12     <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
13         <property name="driverClassName" value="${mysql.driverClass}"/>
14         <property name="url" value="${mysql.JdbcUrl}"/>
15         <property name="username" value="${mysql.User}"/>
16         <property name="password" value="${mysql.Password}"/>
17     </bean>
18 <!--整合mybatis-->
19     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
20        <!--数据源-->
21         <property name="dataSource" ref="dataSource"/>
22         <!--属性文件-->
23         <!--映射文件地址-->
24         <property name="mapperLocations" value="classpath:mapper/*Mapper.xml"/>
25     </bean>
26 
27     <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
28         <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
29         <property name="basePackage" value="com.day03.ssm.spring.mybatis.dao"/>
30     </bean>
31 
32    <!-- <bean id="mapperFactoryBean" class="org.mybatis.spring.mapper.MapperFactoryBean">
33         <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
34         <property name="mapperInterface" value="com.day03.ssm.spring.mybatis.dao.IProduct2Dao"/>
35     </bean>-->
36 
37    <!-- <bean id="productDao" class="com.day03.ssm.spring.mybatis.dao.impl.ProductDao">
38         <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
39     </bean>-->
40 
41 
42 
43 
44 </beans>

View Code

 

 　　mybatis映射文件

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 3         "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 4       <!--
 5       namespace:该映射文件的名字,理论上可以任意取
 6                  没有实现类时 命名空间必须为dao接口的权限命名地址
 7       -->
 8 <mapper namespace="com.day03.ssm.spring.mybatis.dao.IProduct2Dao">
 9    <insert id="save" parameterType="com.day03.ssm.spring.mybatis.model.Product">
10       INSERT INTO product (product_name,sale_price) VALUES (#{productName},#{salePrice})
11    </insert>
12 </mapper>

View Code

 

 　　测试代码:

 1 package com.day03.ssm.spring.mybatis.testDao;
 2 
 3 import com.day03.ssm.spring.mybatis.dao.IProduct2Dao;
 4 import com.day03.ssm.spring.mybatis.model.Product;
 5 import org.junit.Test;
 6 import org.junit.runner.RunWith;
 7 import org.springframework.beans.factory.annotation.Autowired;
 8 import org.springframework.test.context.ContextConfiguration;
 9 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
10 
11 /**
12  * 课程笔记:http://www.cnblogs.com/newAndHui/category/1153640.html
13  * 疑问咨询wx:851298348
14  */
15 @RunWith(SpringJUnit4ClassRunner.class)//把junit加载到spring容器中去
16 @ContextConfiguration("classpath:spring-config3.xml")
17 public class TestProduct3Dao {
18     @Autowired
19     private IProduct2Dao productDao;
20 
21     @Test
22     public void testSave() {
23         Product product = new Product();
24         product.setProductName("小米33");
25         product.setSalePrice(789);
26         productDao.save(product);
27     }
28 }

TestProduct3Dao