spring提供了一个可以操作数据库的对象，模板类
JDBCTemplate
com.springsource.com.mchange.v2.c3p0-0.9.1.2.jar
mysql-connector-java-5.1.40-bin.jar
spring-jdbc-4.2.4.RELEASE.jar
spring-tx-4.2.4.RELEASE.jar</code></pre></div> <div style="width: 100%; max-width: 996px; margin-top: 2px;">
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import java.beans.PropertyVetoException;
import javax.sql.DataSource;
import org.springframework.jdbc.core.JdbcTemplate;
import com.mchange.v2.c3p0.ComboPooledDataSource;
public class Demo1 {
public static void main(String[] args) throws Exception {
//创建连接池对象
ComboPooledDataSource ds = new ComboPooledDataSource();
//配置数据源的四大参数
ds.setDriverClass("com.mysql.jdbc.Driver");
ds.setJdbcUrl("jdbc:mysql://localhost:3306/dianshan");
ds.setUser("root");
ds.setPassword("1234");
//创建模板对象
JdbcTemplate jt = new JdbcTemplate(ds);
String sql = "insert into t_user values(1,'rose')";
//操作数据
jt.execute(sql);
}
}
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<!-- 指定spring使用的配置文件 -->
<context:property-placeholder location="classpath:db.properties"/>
<!-- 开启注解扫描 -->
<context:component-scan base-package="com.yh"/>
<!-- 配置连接池对象 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${driverClass}"/>
<property name="jdbcUrl" value="${jdbcUrl}"/>
<property name="user" value="${user}"/>
<property name="password" value="${password}"/>
</bean>
<!-- 配置JdbcTemplate模板对象，将DataScource注入模板对象中
<bean id="jt" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>
</bean>
-->
<!-- 配置UserDao，将模板对象注入 -->
<bean id="ud" class="com.yh.dao.UserDaoImpl">
<!-- <property name="jt" ref="jt"></property> -->
<property name="dataSource" ref="dataSource"/>
</bean>
</beans>
driverClass=com.mysql.jdbc.Driver
jdbcUrl=jdbc:mysql://localhost:3306/dianshan
user=root
password=1234import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.support.JdbcDaoSupport;
import org.springframework.jdbc.support.xml.Jdbc4SqlXmlHandler;
import com.yh.bean.User;
public class UserDaoImpl extends JdbcDaoSupport implements UserDao {
@Autowired
private ComboPooledDataSource dataSource;
@PostConstruct
private void init(){
super.setDataSource(dataSource);
}
@Override
public void save(User u) {
String sql = "insert into t_user values(?,?)";
super.getJdbcTemplate().update(sql, u.getId(),u.getName());
}
@Override
public void delete(int id) {
super.getJdbcTemplate().update("delete from t_user where id = ?", id);
}
@Override
public void update(User u) {
super.getJdbcTemplate().update("update t_user set name = ? where id = ?", u.getName(),u.getId());
}
@Override
public User getUserById(int id) {
String sql = "select * from t_user where id = ?";
return super.getJdbcTemplate().queryForObject(sql, new RowMapper<User>(){
@Override
public User mapRow(ResultSet arg0, int arg1) throws SQLException {
User user = new User();
user.setId(arg0.getInt(1));
user.setName(arg0.getString(2));
return user;
}
}, id);
}
@Override
public List<User> getAll() {
String sql = "select * from t_user";
return super.getJdbcTemplate().query(sql, new RowMapper<User>(){
@Override
public User mapRow(ResultSet arg0, int arg1) throws SQLException {
User user = new User();
user.setId(arg0.getInt(1));
user.setName(arg0.getString(2));
return user;
}
});
}
@Override
public int getUserCount() {
String sql = "select count(*) from t_user";
return super.getJdbcTemplate().queryForObject(sql, Integer.class);
}
}import javax.annotation.Resource;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import com.yh.bean.User;
import com.yh.dao.UserDao;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class Demo2 {
@Resource(name="ud")
private UserDao dao;
@Test
public void test1(){
User u = new User(2,"tony");
dao.save(u);
}
@Test
public void test2(){
dao.delete(2);
}
@Test
public void test3(){
System.out.println(dao.getUserById(1));
}
@Test
public void test4(){
System.out.println(dao.getUserCount());
}
@Test
public void test5(){
System.out.println(dao.getAll());
}
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