這兩個對象的區別：
1.Statement它更適合執行不同sql的批處理，它沒有提供預處理功能，性能比較低。
2.PreparedStatement它適合執行相同的批處理，它提供了預處理功能，屬性比較高。
/**
*
@param
args
*
@throws
SQLException
*
@throws
ClassNotFoundException
*/
public
static
void
main(String[] args)
throws
ClassNotFoundException,
SQLException {
// 定義sql 語句
String sql1 =
"create table person(id int,name varchar(20))"
;
String sql2 =
"insert into person values(1,'tom')"
;
String sql3 =
"insert into person values(2,'fox')"
;
String sql4 =
"insert into person values(3,'tony')"
;
String sql5 =
"update person set name='張三' where id=1"
;
String sql6 =
"delete from person where id=3"
;
Connection conn = jdbcUtils.getConnection();
Statement st = conn.createStatement();
// 添加批處理sql
st.addBatch(sql1);
st.addBatch(sql2);
st.addBatch(sql3);
st.addBatch(sql4);
st.addBatch(sql5);
st.addBatch(sql6);
// 執行批處理sql
st.executeBatch();
st.clearBatch();
st.close();
conn.close();
}
使用版本高一點的 jdbc的jar包時加入參數可開啟緩存在url中加參數：
?useServerPrepStmts=true&cachePrepStmts=true&rewriteBatchedStatements=true
/**
*
@param
args
*
@throws
SQLException
*
@throws
ClassNotFoundException
*/
public
static
void
main(String[] args)
throws
ClassNotFoundException,
SQLException {
String sqlString =
"insert into person values(?,?)"
;
Connection conn = jdbcUtils. getConnection();
PreparedStatement pst = conn.prepareStatement(sqlString);
long
l = System. currentTimeMillis();
for
(
int
i = 0; i < 10000; i++) {
pst.setInt(1, i);
pst.setString(2,
"name"
+ i);
pst.addBatch();
if
(i % 1000 == 0) {
pst.executeBatch();
pst.clearBatch();
// 清空緩存
}
}
pst.executeBatch();
pst.close();
conn.close();
System.
out
.println(System. currentTimeMillis() - l);
}