mysql 批量插入 java 下执行mysql 批量插入的几种方法及用时
人气:7想了解java 下执行mysql 批量插入的几种方法及用时的相关内容吗，在本文为您仔细讲解mysql 批量插入的相关知识和一些Code实例，欢迎阅读和指正，我们先划重点：mysql,批量插入，下面大家一起来学习吧。
方法1：
Java code
复制代码 代码如下:
conn = DriverManager.getConnection(JDBC_URL, JDBC_USER, JDBC_PASS);
pstmt = conn
.prepareStatement("insert into loadtest (id, data) values (?, ?)");
for (int i = 1; i <= COUNT; i++) {
pstmt.clearParameters();
pstmt.setInt(1, i);
pstmt.setString(2, DATA);
pstmt.execute();
}
MyISAM：246.6秒、InnoDB：360.2秒
方法2： 使用事务，不自动commit
Java code
复制代码 代码如下:
conn = DriverManager.getConnection(JDBC_URL, JDBC_USER, JDBC_PASS);
conn.setAutoCommit(false);
pstmt = conn
.prepareStatement("insert into loadtest (id, data) values (?, ?)");
for (int i = 1; i <= COUNT; i++) {
pstmt.clearParameters();
pstmt.setInt(1, i);
pstmt.setString(2, DATA);
pstmt.execute();
if (i % COMMIT_SIZE == 0) {
conn.commit();
}
}
conn.commit();
InnoDB：31.5秒
方法3： executeBatch
Java code
复制代码 代码如下:
conn = DriverManager.getConnection(JDBC_URL
+ "?rewriteBatchedStatements=true", JDBC_USER, JDBC_PASS);
conn.setAutoCommit(false);
pstmt = conn
.prepareStatement("insert into loadtest (id, data) values (?, ?)");
for (int i = 1; i <= COUNT; i += BATCH_SIZE) {
pstmt.clearBatch();
for (int j = 0; j < BATCH_SIZE; j++) {
pstmt.setInt(1, i + j);
pstmt.setString(2, DATA);
pstmt.addBatch();
}
pstmt.executeBatch();
if ((i + BATCH_SIZE - 1) % COMMIT_SIZE == 0) {
conn.commit();
}
}
conn.commit();
InnoDB：5.2秒
上面的使用时必须
1）rewriteBatchedStatements=true
2）useServerPrepStmts=true
方法4：先LOAD再COMMIT
Java code
复制代码 代码如下:
conn = DriverManager.getConnection(JDBC_URL, JDBC_USER, JDBC_PASS);
conn.setAutoCommit(false);
pstmt = conn.prepareStatement("load data local infile '' "
+ "into table loadtest fields terminated by ','");
StringBuilder sb = new StringBuilder();
for (int i = 1; i <= COUNT; i++) {
sb.append(i + "," + DATA + "\n");
if (i % COMMIT_SIZE == 0) {
InputStream is = new ByteArrayInputStream(sb.toString()
.getBytes());
((com.mysql.jdbc.Statement) pstmt)
.setLocalInfileInputStream(is);
pstmt.execute();
conn.commit();
sb.setLength(0);
}
}
InputStream is = new ByteArrayInputStream(sb.toString().getBytes());
((com.mysql.jdbc.Statement) pstmt).setLocalInfileInputStream(is);
pstmt.execute();
conn.commit();
加载全部内容