9.2JavaEE——JDBCTemplate的常用方法（一）excute()方法

execute()方法用于执行SQL语句，其语法格式如下：

jdTemplate.execute("SQL 语句");

下面以创建数据表的SQL语句为例，来演示excute()方法的使用，具体步骤如下。

1、创建数据库

        在MySQL中，创建一个名为spring的数据库。 

mysql> create database spring;
Query OK, 1 row affected (0.02 sec)

mysql> use spring;
Database changed
mysql> show tables;
Empty set (0.01 sec)

2、创建项目并引入依赖

        在IDEA中创建一个名为chapter09的Maven项目，然后在pom.xml文件中加载使用到的Spring 基础包、Spring依赖包、MySQL数据库的驱动JAR包、Spring JDBC的JAR包和Spring事务处理的JAR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.itheima</groupId>
    <artifactId>chapter09</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>5.2.8.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>5.2.8.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>5.2.8.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.2.8.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
            <version>5.2.8.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- jdbc包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.10.RELEASE</version>
        </dependency>
        <!-- spring-tx包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.2.10.RELEASE</version>
        </dependency>
        <!-- MySQL数据库驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.11</version>
            <scope>runtime</scope>
        </dependency>
        <!-- aspectjweaver依赖 -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.6</version>
            <scope>runtime</scope>
        </dependency>
        <!-- aopalliance依赖包 -->
        <dependency>
            <groupId>aopalliance</groupId>
            <artifactId>aopalliance</artifactId>
            <version>1.0</version>
        </dependency>
    </dependencies>
</project>

3、编写配置文件

        在chapter09项目的src/main/resources目录下，创建配置文件applicationContext.xml，在该文件中配置数据源Bean和JDBC模板Bean，并将数据源注入到JDBC模板中。

<!-- 1. 配置数据源 -->
<bean id="dataSource" class= "org.springframework.jdbc.datasource.DriverManagerDataSource">
	<property name="driverClassName" value="com.mysql.jdbc.Driver" />
	<property name="url" value="jdbc:mysql://localhost/spring" />
	<property name="username" value="root" />
	<property name="password" value="root" /></bean>
<!-- 2. 配置 JDBC 模板 -->
<bean id="jdbcTemplate" 	   class="org.springframework.jdbc.core.JdbcTemplate">
	<property name="dataSource" ref="dataSource" /></bean>

4、编写测试类

        创建测试类TestJdbcTemplate，在该类的main()方法中获取JdbcTemplate实例，然后调用execute()方法执行创建数据表的SQL语句。 

public class TestJdbcTemplate {
    public static void main(String[] args) {
        ApplicationContext applicationContext = new
            ClassPathXmlApplicationContext("applicationContext.xml");
        JdbcTemplate jdTemplate =
                (JdbcTemplate) applicationContext.getBean("jdbcTemplate");
        jdTemplate.execute("create table account(" +
                "id int primary key auto_increment," +
                “username varchar(50)," + 	"balance double)");
        System.out.println("账户表account创建成功！");}
}

5、查看运行结果

        在IDEA中启动TestJdbcTemplate类，再次查询spring数据库。 

mysql> show tables;
Empty set (0.01 sec)

mysql> show tables;
+--------------------+
| Tables_in_spring   |
+--------------------+
| account            |
+--------------------+
1 rows in set (0.00 sec)

9.2JavaEE——JDBCTemplate的常用方法（二）update()方法

9.2JavaEE——JDBCTemplate的常用方法（三）query()方法