Apr 17, 2023 3:22:47 AM net.snowflake.client.core.SecureStorageWindowsManager getCredential
INFO: Failed to read target or could not find it in Windows Credential Manager. Error code = 1168
public static void destroy(){ // 我们必须在关闭资源之前先检查我们是否拥有有效的对象 // 因为我们不能对不存在的对象采取行动 尝试 { 如果( rs!=null) rs.close(); 如果（stm！=null）stm.close（）； 如果( con!=null) con.close(); } 赶上（异常 e）{ System.out.println("关闭资源时出错" + e.getMessage() ); }
}
/**
* This method will reset the cursor to before first location
*/
private static void resetCursor(){
try {
rs.beforeFirst();
} catch (Exception e) {
e.printStackTrace();
}
}
// find out the row count
/**
* find out the row count
* @return row count of this ResultSet
*/
public static int getRowCount(){
int rowCount = 0 ;
try {
rs.last() ;
rowCount = rs.getRow() ;
} catch (Exception e) {
System.out.println("ERROR OCCURRED WHILE GETTING ROW COUNT " + e.getMessage() );
}finally {
resetCursor();
}
return rowCount ;
}
/**
* find out the column count
* @return column count of this ResultSet
*/
public static int getColumnCount(){
int columnCount = 0 ;
try {
columnCount = rsmd.getColumnCount();
} catch (Exception e) {
System.out.println("ERROR OCCURRED WHILE GETTING COLUMN COUNT " + e.getMessage() );
}
return columnCount ;
}
// get entire row of data according to row number
/**
* Getting entire row of data in a List of String
* @param rowNum row number to get as a list
* @return row data as List of String
*/
public static List<String> getRowDataAsList( int rowNum ){
List<String> rowDataAsLst = new ArrayList<>();
int colCount = getColumnCount() ;
try {
rs.absolute( rowNum );
for (int colIndex = 1; colIndex <= colCount ; colIndex++) {
String cellValue = rs.getString( colIndex ) ;
rowDataAsLst.add( cellValue ) ;
}
} catch (Exception e) {
System.out.println("ERROR OCCURRED WHILE getRowDataAsList " + e.getMessage() );
}finally {
resetCursor();
}
return rowDataAsLst ;
}
/**
* getting the cell value according to row num and column index
* @param rowNum row number to get the data from
* @param columnIndex column number to get the data from
* @return the value in String at that location
*/
public static String getCellValue(int rowNum , int columnIndex) {
String cellValue = "" ;
try {
rs.absolute(rowNum) ;
cellValue = rs.getString(columnIndex ) ;
} catch (Exception e) {
System.out.println("ERROR OCCURRED WHILE getCellValue " + e.getMessage() );
}finally {
resetCursor();
}
return cellValue ;
}
/**
* getting the cell value according to row num and column name
* @param rowNum row number to get the data from
* @param columnName column Name to get the data from
* @return the value in String at that location
*/
public static String getCellValue(int rowNum ,String columnName){
String cellValue = "" ;
try {
rs.absolute(rowNum) ;
cellValue = rs.getString( columnName ) ;
} catch (Exception e) {
System.out.println("ERROR OCCURRED WHILE getCellValue " + e.getMessage() );
}finally {
resetCursor();
}
return cellValue ;
}
/**
* Get First Cell Value at First row First Column
*/
public static String getFirstRowFirstColumn(){
return getCellValue(1,1) ;
}
/**
* getting entire column data as list according to column number
* @param columnNum column number to get all data
* @return List object that contains all rows of that column
*/
public static List<String> getColumnDataAsList(int columnNum){
List<String> columnDataLst = new ArrayList<>();
try {
rs.beforeFirst(); // make sure the cursor is at before first location
while( rs.next() ){
String cellValue = rs.getString(columnNum) ;
columnDataLst.add(cellValue) ;
}
} catch (Exception e) {
System.out.println("ERROR OCCURRED WHILE getColumnDataAsList " + e.getMessage() );
}finally {
resetCursor();
}
return columnDataLst ;
}
/**
* getting entire column data as list according to column Name
* @param columnName column name to get all data
* @return List object that contains all rows of that column
*/
public static List<String> getColumnDataAsList(String columnName){
List<String> columnDataLst = new ArrayList<>();
try {
rs.beforeFirst(); // make sure the cursor is at before first location
while( rs.next() ){
String cellValue = rs.getString(columnName) ;
columnDataLst.add(cellValue) ;
}
} catch (Exception e) {
System.out.println("ERROR OCCURRED WHILE getColumnDataAsList " + e.getMessage() );
}finally {
resetCursor();
}
return columnDataLst ;
}
/**
* display all data from the ResultSet Object
* @return
*/
public static List<String> displayAllData(){
int columnCount = getColumnCount() ;
resetCursor();
try{
while(rs.next()){
for (int colIndex = 1; colIndex <= columnCount; colIndex++) {
//System.out.print( rs.getString(colIndex) + "\t" );
System.out.printf("%-25s", rs.getString(colIndex));
}
System.out.println();
}
}catch(Exception e){
System.out.println("ERROR OCCURRED WHILE displayAllData " + e.getMessage() );
}finally {
resetCursor();
}
return null;
}
/**
* Save entire row data as Map<String,String>
* @param rowNum row number
* @return Map object that contains key value pair
* key : column name
* value : cell value
*/
public static Map<String,String> getRowMap(int rowNum){
Map<String,String> rowMap = new LinkedHashMap<>();
int columnCount = getColumnCount() ;
try{
rs.absolute(rowNum) ;
for (int colIndex = 1; colIndex <= columnCount ; colIndex++) {
String columnName = rsmd.getColumnName(colIndex) ;
String cellValue = rs.getString(colIndex) ;
rowMap.put(columnName, cellValue) ;
}
}catch(Exception e){
System.out.println("ERROR OCCURRED WHILE getRowMap " + e.getMessage() );
}finally {
resetCursor();
}
return rowMap ;
}
/**
* We know how to store one row as map object
* Now Store All rows as List of Map object
* @return List of Map object that contain each row data as Map<String,String>
*/
public static List<Map<String,String>> getAllRowAsListOfMap(){
List<Map<String,String>> allRowLstOfMap = new ArrayList<>();
int rowCount = getRowCount() ;
// move from first row till last row
// get each row as map object and add it to the list
for (int rowIndex = 1; rowIndex <= rowCount ; rowIndex++) {
Map<String,String> rowMap = getRowMap(rowIndex);
allRowLstOfMap.add( rowMap ) ;
}
resetCursor();
return allRowLstOfMap ;
}
public static void createConnectionforSnowflake(String snowflakehost , int snowflakeport, String snowflakeusername,String snowflakepassword,String snowflakerole, String snowflakedatabase,String snowflakeschema,String snowflakewarehouse, String snowflakeurl){
try {
con = DriverManager.getConnection(snowflakeurl, snowflakeusername, snowflakepassword) ;
System.out.println("Successfully connected to Snowflake!");
} catch (SQLException e) {
e.printStackTrace();
}
}
public static ResultSet snowflakerunQuery(String sql){
try Class.forName("com.snowflake.client.jdbc.SnowflakeDriver");
stm = con.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
stm.executeQuery("");
stm.executeQuery("");
stm.executeQuery("");
stm.executeQuery("");
rs = stm.executeQuery(sql); // setting the value of ResultSet
objectrsmd = rs.getMetaData() ; // setting the value of ResultSetMetaData for reuse
} catch(Exception e){
System.out.println("ERROR OCCURRED WHILE RUNNING QUERY "+ e.getMessage() );
}
return rs ;
}
可能是什么问题？