跟着刚哥学习Spring框架--JDBC（六）

1 CREATE TABLE `person` (
2   `id` int(11) NOT NULL AUTO_INCREMENT,
3   `name` varchar(255) DEFAULT NULL,
4   `age` int(11) DEFAULT NULL,
5   PRIMARY KEY (`id`)
6 )

 1 class Person{
 2     private int id;
 3     private String name;
 4     private int age;
 5 
 6     public int getId() {
 7         return id;
 8     }
 9 
10     public void setId(int id) {
11         this.id = id;
12     }
13 
14     public String getName() {
15         return name;
16     }
17 
18     public void setName(String name) {
19         this.name = name;
20     }
21 
22     public int getAge() {
23         return age;
24     }
25 
26     public void setAge(int age) {
27         this.age = age;
28     }
29 
30     @Override
31     public String toString() {
32         return "Person{" +
33                 "id=" + id +
34                 ", name=‘" + name + ‘\‘‘ +
35                 ", age=" + age +
36                 ‘}‘;
37     }
38 }

 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 http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
 6 
 7         <!-- 导入资源文件 -->
 8         <context:property-placeholder location="classpath:db.properties"></context:property-placeholder>
 9 
10         <!-- 配置druid数据库连接池 -->
11         <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
12             <property name="driverClassName" value="${jdbc.driverClass}"></property>
13             <property name="url" value="${jdbc.url}"></property>
14             <property name="username" value="${jdbc.user}"></property>
15             <property name="password" value="${jdbc.password}"></property>
16 
17             <!-- 最大并发连接数 -->
18             <property name="maxActive" value="${jdbc.maxActive}" />
19             <!-- 初始化连接数量 -->
20             <property name="initialSize" value="${jdbc.initialSize}" />
21             <!-- 配置获取连接等待超时的时间 -->
22             <property name="maxWait" value="${jdbc.maxWait}" />
23             <!-- 最小空闲连接数 -->
24             <property name="minIdle" value="${jdbc.minIdle}" />
25             <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
26             <property name="timeBetweenEvictionRunsMillis" value="${jdbc.timeBetweenEvictionRunsMillis}" />
27             <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
28             <property name="minEvictableIdleTimeMillis" value="${jdbc.minEvictableIdleTimeMillis}" />
29             <property name="validationQuery" value="${jdbc.validationQuery}" />
30             <property name="testWhileIdle" value="${jdbc.testWhileIdle}" />
31             <property name="testOnBorrow" value="${jdbc.testOnBorrow}" />
32             <property name="testOnReturn" value="${jdbc.testOnReturn}" />
33             <property name="poolPreparedStatements" value="${jdbc.poolPreparedStatements}" />
34             <property name="maxOpenPreparedStatements" value="${jdbc.maxOpenPreparedStatements}" />
35         </bean>
36 
37         <!-- 配置Spring 的JDBCTemplate -->
38         <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
39             <property name="dataSource" ref="dataSource"></property>
40         </bean>
41 </beans>

 1 jdbc.user=root
 2 jdbc.password=hzg1984110
 3 jdbc.driverClass=com.mysql.jdbc.Driver
 4 jdbc.url=jdbc:mysql:///hzgtest
 5 
 6 jdbc.maxActive=30
 7 jdbc.initialSize=5
 8 jdbc.maxWait=60000
 9 jdbc.minIdle=5
10 jdbc.timeBetweenEvictionRunsMillis=60000
11 jdbc.minEvictableIdleTimeMillis=300000
12 jdbc.validationQuery=SELECT ‘x‘
13 jdbc.testWhileIdle=true
14 jdbc.testOnBorrow=false
15 jdbc.testOnReturn=false
16 jdbc.poolPreparedStatements=false
17 jdbc.maxOpenPreparedStatements=100

 1 public static void main(String[] args) {
 2         ApplicationContext ctx = new ClassPathXmlApplicationContext("configdb.xml");
 3         JdbcTemplate jdbcTemplate = (JdbcTemplate) ctx.getBean("jdbcTemplate");
 4         //插入数据
 5         String sql = "insert into person(name,age) values(?,?)";
 6         jdbcTemplate.update(sql,"hzg",32);
 7 
 8         //批量插入数据
 9         sql = "insert into person(name,age) values(?,?)";
10         List<Object[]> batchArgs = new ArrayList<>();
11         batchArgs.add(new Object[]{"A",20});
12         batchArgs.add(new Object[]{"B",30});
13         batchArgs.add(new Object[]{"C",40});
14         jdbcTemplate.batchUpdate(sql,batchArgs);
15 
16         //根据ID查询数据
17         sql = "SELECT id,name,age FROM person WHERE id = ?";
18         RowMapper<Person> personRowMapper = new BeanPropertyRowMapper<>(Person.class);
19         Person person = jdbcTemplate.queryForObject(sql,personRowMapper,1);
20         System.out.println(person);
21 
22         //查询数据集合
23         sql = "SELECT id,name,age FROM person WHERE id > ?";
24         RowMapper<Person> rowMapper = new BeanPropertyRowMapper<>(Person.class);
25         List<Person> personList= jdbcTemplate.query(sql,rowMapper,1);
26         System.out.println(personList);
27 
28         //查询具体的值
29         sql = "SELECT count(1) FROM person WHERE id > ?";
30         int excuteCount = jdbcTemplate.queryForObject(sql,Integer.class,1);
31         System.out.println(excuteCount);
32     }