我有200K行要插入到一个数据库表中。我试图在春季使用，以便每批插入10，000。但是，此过程消耗了太多时间（200K 行为 7 分钟）。因此，在数据库端，我检查了 插入的行数。我发现行数略有增加，而不是预期的10K。任何人都可以解释原因是什么，或者它应该在数据库端配置吗？jdbcTemplate.batchUpdateselect count(*) from table_X
PS：我正在使用sybase....
网络上有很多可用的方法。性能直接取决于
如果不看你的代码，任何人都可以猜到，但没有人能找到确切的解决方案。
方法 1
//insert batch example
public void insertBatch(final List<Customer> customers){
String sql = "INSERT INTO CUSTOMER " +
"(CUST_ID, NAME, AGE) VALUES (?, ?, ?)";
getJdbcTemplate().batchUpdate(sql, new BatchPreparedStatementSetter() {
@Override
public void setValues(PreparedStatement ps, int i) throws SQLException {
Customer customer = customers.get(i);
ps.setLong(1, customer.getCustId());
ps.setString(2, customer.getName());
ps.setInt(3, customer.getAge() );
}
@Override
public int getBatchSize() {
return customers.size();
}
});
}
参考
https://www.mkyong.com/spring/spring-jdbctemplate-batchupdate-example/
http://docs.spring.io/spring-framework/docs/3.0.0.M4/reference/html/ch12s04.html
方法 2.1
//insert batch example
public void insertBatch(final List<Customer> customers){
String sql = "INSERT INTO CUSTOMER " +
"(CUST_ID, NAME, AGE) VALUES (?, ?, ?)";
List<Object[]> parameters = new ArrayList<Object[]>();
for (Customer cust : customers) {
parameters.add(new Object[] {cust.getCustId(),
cust.getName(), cust.getAge()}
);
}
getSimpleJdbcTemplate().batchUpdate(sql, parameters);
}
或者，您可以直接执行 SQL。
//insert batch example with SQL
public void insertBatchSQL(final String sql){
getJdbcTemplate().batchUpdate(new String[]{sql});
}
参考
https://www.mkyong.com/spring/spring-simplejdbctemplate-batchupdate-example/
方法 2.2
public class JdbcActorDao implements ActorDao {
private SimpleJdbcTemplate simpleJdbcTemplate;
public void setDataSource(DataSource dataSource) {
this.simpleJdbcTemplate = new SimpleJdbcTemplate(dataSource);
}
public int[] batchUpdate(final List<Actor> actors) {
SqlParameterSource[] batch = SqlParameterSourceUtils.createBatch(actors.toArray());
int[] updateCounts = simpleJdbcTemplate.batchUpdate(
"update t_actor set first_name = :firstName, last_name = :lastName where id = :id",
batch);
return updateCounts;
}
// ... additional methods
}
方法 2.3
public class JdbcActorDao implements ActorDao {
private SimpleJdbcTemplate simpleJdbcTemplate;
public void setDataSource(DataSource dataSource) {
this.simpleJdbcTemplate = new SimpleJdbcTemplate(dataSource);
}
public int[] batchUpdate(final List<Actor> actors) {
List<Object[]> batch = new ArrayList<Object[]>();
for (Actor actor : actors) {
Object[] values = new Object[] {
actor.getFirstName(),
actor.getLastName(),
actor.getId()};
batch.add(values);
}
int[] updateCounts = simpleJdbcTemplate.batchUpdate(
"update t_actor set first_name = ?, last_name = ? where id = ?",
batch);
return updateCounts;
}
// ... additional methods
}
方法3：JDBC
dbConnection.setAutoCommit(false);//commit trasaction manually
String insertTableSQL = "INSERT INTO DBUSER"
+ "(USER_ID, USERNAME, CREATED_BY, CREATED_DATE) VALUES"
+ "(?,?,?,?)";
PreparedStatement = dbConnection.prepareStatement(insertTableSQL);
preparedStatement.setInt(1, 101);
preparedStatement.setString(2, "mkyong101");
preparedStatement.setString(3, "system");
preparedStatement.setTimestamp(4, getCurrentTimeStamp());
preparedStatement.addBatch();
preparedStatement.setInt(1, 102);
preparedStatement.setString(2, "mkyong102");
preparedStatement.setString(3, "system");
preparedStatement.setTimestamp(4, getCurrentTimeStamp());
preparedStatement.addBatch();
preparedStatement.executeBatch();
dbConnection.commit();
参考
https://www.mkyong.com/jdbc/jdbc-preparedstatement-example-batch-update/
/*Happy Coding*/
请尝试在下面为连接字符串 - 进行设置。没有尝试过，但它来自我的书签。您可以在这些行上进行搜索。useServerPrepStmts=false&rewriteBatchedStatements=true
Connection c = DriverManager.getConnection("jdbc:<db>://host:<port>/db?useServerPrepStmts=false&rewriteBatchedStatements=true", "username", "password");
