这两个对象的区别：
1.Statement它更适合执行不同sql的批处理，它没有提供预处理功能，性能比较低。
2.PreparedStatement它适合执行相同的批处理，它提供了预处理功能，属性比较高。
/**
* @param args
* @throws SQLException
* @throws ClassNotFoundException
*/
public static void main(String[] args) throws ClassNotFoundException,
SQLException {
// 定义sql 语句
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='张三' where id=1";
String sql6 = "delete from person where id=3";
Connection conn = jdbcUtils.getConnection();
Statement st = conn.createStatement();
// 添加批处理sql
st.addBatch(sql1);
st.addBatch(sql2);
st.addBatch(sql3);
st.addBatch(sql4);
st.addBatch(sql5);
st.addBatch(sql6);
// 执行批处理sql
st.executeBatch();
st.clearBatch();
st.close();
conn.close();
}
使用版本高一点的 jdbc的jar包时加入参数可开启缓存在url中加参数：
?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(); // 清空缓存
}
}
pst.executeBatch();
pst.close();
conn.close();
System. out.println(System. currentTimeMillis() - l);
}
