Java BatchSqlUpdate-如何获取自动生成的密钥
我正在使用SpringBatchSQLUpdate插入一组行。如何为插入的所有行获取自动生成的键 当做一次单次插入时,我得到的键如下-Java BatchSqlUpdate-如何获取自动生成的密钥,java,mysql,sql,spring,Java,Mysql,Sql,Spring,我正在使用SpringBatchSQLUpdate插入一组行。如何为插入的所有行获取自动生成的键 当做一次单次插入时,我得到的键如下- SqlUpdate sqlUpdate = new SqlUpdate(dataSource, sqlTemplate.toString()); sqlUpdate.setReturnGeneratedKeys(true); KeyHolder keyHolder = new GeneratedKeyHolder(); sqlUpdate.update(new
SqlUpdate sqlUpdate = new SqlUpdate(dataSource, sqlTemplate.toString());
sqlUpdate.setReturnGeneratedKeys(true);
KeyHolder keyHolder = new GeneratedKeyHolder();
sqlUpdate.update(new Object[] {}, keyHolder);
return keyHolder.getKey().longValue();
谢谢 据我所知,没有提供使用
BatchSqlUpdate
解决此问题的解决方案,但您始终可以
- 查询插入前的最后一个键
- 使用此信息,在插入后查询所有新键
- 模板过程类:
public abstract class BatchPreparedStatementSetterWithKeyHolder<T> implements BatchPreparedStatementSetter {
private final List<T> beans;
/**
* @param datas
* @param returnGeneratedKeys true设置{@linkplain Statement#RETURN_GENERATED_KEYS}
*/
public BatchPreparedStatementSetterWithKeyHolder(List<T> beans) {
this.beans = beans;
}
@Override
public void setValues(PreparedStatement ps, int i) throws SQLException {
setValues(ps, beans.get(i));
}
@Override
public final int getBatchSize() {
return beans.size();
}
public void setPrimaryKey(KeyHolder keyHolder) {
List<Map<String, Object>> keys = keyHolder.getKeyList();
for (int i = 0, len = keys.size(); i < len; i++) {
setPrimaryKey(keys.get(i), beans.get(i));
}
}
protected abstract void setValues(PreparedStatement ps, T bean) throws SQLException;
protected abstract void setPrimaryKey(Map<String, Object> primaryKey, T bean);
}
公共抽象类BatchPreparedStatementSetterWithKeyHolder实现BatchPreparedStatementSetter{
私有最终列表bean;
/**
*@param数据
*@param returnGeneratedKeys true设置{@linkplain语句#返回_生成的_键}
*/
公共BatchPreparedStatementSetterWithKeyHolder(列表bean){
这个.豆子=豆子;
}
@凌驾
公共void setValues(PreparedStatement ps,int i)引发SQLException{
设置值(ps,beans.get(i));
}
@凌驾
公共最终整数getBatchSize(){
返回beans.size();
}
公共无效设置PrimaryKey(钥匙座钥匙座){
List keys=keyHolder.getKeyList();
for(int i=0,len=keys.size();i
一个util方法batchupdate:
private static void generatedKeys(PreparedStatement ps, KeyHolder keyHolder) throws SQLException {
List<Map<String, Object>> keys = keyHolder.getKeyList();
ResultSet rs = ps.getGeneratedKeys();
if (rs == null) return;
try {
keys.addAll(new RowMapperResultSetExtractor<Map<String, Object>>(new ColumnMapRowMapper(), 1).extractData(rs));
} finally {
UtilIO.close(rs);
}
}
/**
* 批量更新
* @param jdbcTemplate
* @param sql
* @param pss
* @param keyHolder 存储主键,如果要存储主键,就必须传入此对象
* @return sql执行结果
* @see JdbcTemplate#batchUpdate(String, org.springframework.jdbc.core.BatchPreparedStatementSetter)
*/
public static <T> int[] batchUpdateWithKeyHolder(JdbcTemplate jdbcTemplate, final String sql, final BatchPreparedStatementSetterWithKeyHolder<T> pss) {
return jdbcTemplate.execute(new PreparedStatementCreator() {
@Override
public PreparedStatement createPreparedStatement(Connection con) throws SQLException {
return con.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS);
}
}, new PreparedStatementCallback<int[]>() {
@Override
public int[] doInPreparedStatement(PreparedStatement ps) throws SQLException, DataAccessException {
try {
int batchSize = pss.getBatchSize();
InterruptibleBatchPreparedStatementSetter ipss =
(pss instanceof InterruptibleBatchPreparedStatementSetter ?
(InterruptibleBatchPreparedStatementSetter) pss : null);
int[] result;
KeyHolder keyHolder = new GeneratedKeyHolder();
try {
if (JdbcUtils.supportsBatchUpdates(ps.getConnection())) {
for (int i = 0; i < batchSize; i++) {
pss.setValues(ps, i);
if (ipss != null && ipss.isBatchExhausted(i)) break;
ps.addBatch();
}
result = ps.executeBatch();
generatedKeys(ps, keyHolder);
} else {
List<Integer> rowsAffected = new ArrayList<Integer>();
for (int i = 0; i < batchSize; i++) {
pss.setValues(ps, i);
if (ipss != null && ipss.isBatchExhausted(i)) break;
rowsAffected.add(ps.executeUpdate());
generatedKeys(ps, keyHolder);
}
result = UtilObj.tointArray(rowsAffected);
}
} finally {
pss.setPrimaryKey(keyHolder);
}
return result;
} finally {
if (pss instanceof ParameterDisposer) ((ParameterDisposer) pss).cleanupParameters();
}
}
});
}
private static void generatedKeys(PreparedStatement ps,KeyHolder KeyHolder)抛出SQLException{
List keys=keyHolder.getKeyList();
ResultSet rs=ps.getGeneratedKeys();
如果(rs==null)返回;
试一试{
addAll(新的RowMapperResultSetExtractor(新的ColumnMapRowMapper(),1).extractData(rs));
}最后{
公用设施关闭(rs);
}
}
/**
* 批量更新
*@param jdbc模板
*@param-sql
*@param-pss
*@param钥匙夹存储主键,如果要存储主键,就必须传入此对象
*@returnsql执行结果
*@参见JdbcTemplate#batchUpdate(String,org.springframework.jdbc.core.BatchPreparedStatementSetter)
*/
公共静态int[]batchUpdateWithKeyHolder(JdbcTemplate JdbcTemplate,最终字符串sql,最终BatchPreparedStatementSetterWithKeyHolder pss){
返回jdbcTemplate.execute(新的PreparedStatementCreator(){
@凌驾
公共PreparedStatement createPreparedStatement(连接con)引发SQLException{
return con.prepareStatement(sql、Statement.return\u生成的\u键);
}
},新的PreparedStatementCallback(){
@凌驾
public int[]doInPreparedStatement(PreparedStatement ps)抛出SQLException、DataAccessException{
试一试{
int batchSize=pss.getBatchSize();
中断BatchPreparedStatementSetter ipss=
(pss中断BatchPreparedStatementSetter的实例?
(InterruptableBatchPreparedStatementSetter)pss:null);
int[]结果;
KeyHolder KeyHolder=新生成的KeyHolder();
试一试{
if(JdbcUtils.supportsBatchUpdates(ps.getConnection())){
对于(int i=0;i
e、 x:
UtilJdbc.batchUpdateWithKeyHolder(jdbcTemplate,
插入到tbe_vm_节点(创建者id、主机、ssh_ip、ssh_用户、ssh_密码)+
“值(?,,,?,?)”,
新的BatchPreparedStatementSetterWithKeyHolder(vmNodes){
@凌驾
受保护的void setValues(PreparedStatement ps,VmNode VmNode)引发SQLException{
UtilJdbc.setValues(ps,vmNode.getCreatorId(),vmNode.getHost(),
vmNode.getSshIp(),vmNode.getSshUser(),vmNode.getSshPasswd());
}
@凌驾
受保护的void setPrimaryKey(映射primaryKey、VmNode VmNode){
setId((长)primaryKey.get(“abc”);
}
});
感谢提供的解决方案,我实现了它,效果非常好。但是,您有对私有类(UtilIo、UtilObj)的引用,我必须在其中解释您所做的工作。我将“实用关闭(rs);”替换为:
我将“result=UtilObj.tointArray(rowsAffected);”替换为以下Java 8代码:
result = rowsAffected.stream().mapToInt(Integer::intValue).toArray();
谢谢(到目前为止,我问了大约14个问题,其中一半没有答案,我自己回答了一两个。
KeyHolder keyHolder = new GeneratedKeyHolder();
BatchSqlUpdate updateBatch = new BatchSqlUpdate();
updateBatch.setSql("Some INSERT SQL");
updateBatch.setJdbcTemplate(jdbcTemp);
updateBatch.setReturnGeneratedKeys(true);
updateBatch.updateByNamedParam( paramsMap ,keyHolder);
updateBatch.flush();
if (rs != null) {
rs.close();
}
result = rowsAffected.stream().mapToInt(Integer::intValue).toArray();