/**
* 设置数据库连接工具类
* 包括(连接、注册驱动、释放连接)
*
*
* 设置数据库连接工具类
* 包括(连接、注册驱动、释放连接)
*
*
*/
public
final
class
DBUtils {
private
static
String mysqlurl =
"jdbc:mysql://....../mytest"
;
private
static
String accessurl =
"jdbc:mysql://...../mytest"
;
private
static
String user =
"root"
;
private
static
String password =
"root"
;
// 获得连接
public
static
Connection getAccessConn()
throws
SQLException {
return
DriverManager.getConnection(accessurl, user, password);
}
public
static
Connection getMySqlConn()
throws
SQLException {
return
DriverManager.getConnection(mysqlurl, user, password);
}
// 释放连接
public
static
void
free(ResultSet rs, PreparedStatement ps, Connection conn) {
try
{
if
(rs !=
null
) {
rs.close();
}
}
catch
(SQLException e) {
e.printStackTrace();
}
finally
{
try
{
if
(ps !=
null
) {
ps.close();
}
}
catch
(SQLException e) {
e.printStackTrace();
}
finally
{
try
{
if
(conn !=
null
) {
conn.close();
}
}
catch
(SQLException e) {
e.printStackTrace();
}
}
}
}
// 加载驱动
static
{
try
{
Class.forName(
"com.mysql.jdbc.Driver"
);
}
catch
(ClassNotFoundException e) {
System.out.println(
"驱动加载出错"
);
}
}
}
使用测试类
public
class
BatchExample {
private
static
Connection mysqlConn =
null
;
private
static
ResultSet rs =
null
;
// 总条数
private
static
int
allCount =
10000
;
// 分批条数
private
static
int
preCount =
1000
;
// 计数器
private
static
int
count =
0
;
private
static
String insertSQL =
"insert into users(firstname, lastname, age) values(?, ?, ?)"
;
private
static
PreparedStatement mysqlPs =
null
;
public
static
void
main(String[] args)
throws
SQLException {
try
{
mysqlConn = DBUtils.getMySqlConn();
mysqlPs = mysqlConn.prepareStatement(insertSQL);
//执行操作不提交，最后通过手动进行提交事务
mysqlConn.setAutoCommit(
false
);
long
start = System.currentTimeMillis();
for
(
int
i =
1
; i <= allCount; i++) {
mysqlPs.setString(
1
,
"firstname"
+ i);
mysqlPs.setString(
2
,
"lastname"
+ i);
mysqlPs.setInt(
3
,
23
);
//先将数据暂存起来
mysqlPs.addBatch();
if
((i % preCount) ==
0
){
//将暂存的数据进行批量执行
mysqlPs.executeBatch();
System.out.println(
"当前进行完毕===>"
+ (++count) * preCount +
"条"
);
}
}
long
end = System.currentTimeMillis();
System.out.println(
"数据导入完毕,所用时间为: "
+ (end - start) +
" ms"
);
}
catch
(Exception e) {
mysqlConn.rollback();
System.out.println(
"数据出错,已进行回滚"
);
throw
new
RuntimeException();
}
finally
{
//进行事务提交
mysqlConn.commit();
DBUtils.free(rs, mysqlPs, mysqlConn);
}
}
}