我已经按照@TT的建议以这种方式重构了代码，而声纳 。
public boolean validateConnection(Connection conn) {
LOGGER.log( LogEntries.PingConn );
try{
if(conn == null){
LOGGER.log( LogEntries.PingError, "Null connection on PING. Reached max # of connections or network issue. Stats: "+getCacheStatistics() );
return false;
}
if(conn.isClosed()){
LOGGER.log( LogEntries.PingError, "Found closed connection during validation PING." );
return false;
}
try( PreparedStatement statement = conn.prepareStatement( PING ) ){
statement.setQueryTimeout(QUERY_TIMEOUT);
try( ResultSet rs = statement.executeQuery() ){
if ( rs != null && rs.next() ) {
return true;
}
}
}
}catch(Exception ex){
LOGGER.log( LogEntries.PingError, ex );
}
return false;
}
没有“ try-with-resource”，代码可以按以下方式重构，但是在这种情况下，Sonar ：
public boolean validateConnection(Connection conn) {
LOGGER.log( LogEntries.PingConn );
PreparedStatement statement = null;
ResultSet rs = null;
try{
if(conn == null){
LOGGER.log( LogEntries.PingError, "Null connection on PING. Reached max # of connections or network issue. Stats: "+getCacheStatistics() );
return false;
}
if(conn.isClosed()){
LOGGER.log( LogEntries.PingError, "Found closed connection during validation PING." );
return false;
}
statement = conn.prepareStatement( PING );
statement.setQueryTimeout( QUERY_TIMEOUT );
rs = statement.executeQuery();
if ( rs != null && rs.next() ) {
return true;
}
}catch(Exception ex){
LOGGER.log( LogEntries.PingError, ex );
}finally{
try {
if(rs!=null){
rs.close();
}
} catch (sqlException eClosing1) {
LOGGER.log( LogEntries.PingError, eClosing1 );
}finally{
try {
if(statement!=null){
statement.close();
}
}catch (sqlException eClosing2) {
LOGGER.log( LogEntries.PingError, eClosing2 );
}
}
}
return false;
}
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