它从主题中的错误消息开始。当我将connectionProperties添加到DriverManagerDataSource时，现在我得到了
线程“main”中的异常org.springframework.jdbc.CannotGetJdbcConnectionException：无法获取JDBC连接;嵌套异常是com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException：无法创建与数据库服务器的连接。尝试重新连接3次。放弃。
这在很多成功的选择和插入（数千）之后发生。 我错过了什么，我做错了什么？ mysql Connector是5.1.40，mysql Server是5.5.35和Spring Framework 4.0.1
这是我正在做的事情：
private void doTheTransfer() {
String requestStr = "SELECT edv_nr, edv_var, protokoll FROM HeaderBlock order by edv_nr, edv_var;";
JdbcTemplate jdbcTemplate = new JdbcTemplate();
jdbcTemplate.setDataSource(getMySQLDriverManagerDatasource());
List<HeaderBlockValueObject> rows = jdbcTemplate.query( requestStr, new HeaderBlockRowMapper());
int iEDVNr;
int iEDVVar;
String sProtokoll;
String sqlEntries;
String sqlInsert;
List<EdvProtocolValueObject> existingEntries;
RowMapper myRowMapper = new EdvProtocolRowMapper(true);
for (HeaderBlockValueObject headerBlockValueObject : rows) {
iEDVNr = headerBlockValueObject.getEdvNr();
iEDVVar = headerBlockValueObject.getEdvVar();
sProtokoll = headerBlockValueObject.getProtokoll();
if ( (iEDVNr > 0) && (sProtokoll != null) && (!sProtokoll.trim().isEmpty()) ){
int iNewProtocolID;
sqlEntries = "SELECT MIN(PROTOCOL_ID) FROM EDV_PROTOCOL"
+ " where edv_nr = " + iEDVNr
+ " and edv_var = " + iEDVVar;
existingEntries = jdbcTemplate.query( sqlEntries, myRowMapper);
if ( existingEntries == null || existingEntries.isEmpty()
|| existingEntries.get(0).getProtokoll_ID() > 0) {
iNewProtocolID = -1;
} else {
iNewProtocolID = (int) existingEntries.get(0).getProtokoll_ID() - 1;
}
sqlInsert = "insert into edv_protocol set EDV_NR = " + iEDVNr
+ ", EDV_VAR = " + iEDVVar
+ ", PROTOCOL_ID = " + iNewProtocolID
+ ", DESCRIPTION = '" + sProtokoll + "'"
+ ";";
try{
jdbcTemplate.execute(sqlInsert);
saveLogEntry(sqlInsert + " successful");
} catch ( DataAccessException exception ) {
saveLogEntry(sqlInsert + " failed");
saveLogEntry( exception.getLocalizedMessage() );
}
}
}
}
public DriverManagerDataSource getMySQLDriverManagerDatasource(){
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dataSource.setPassword("goforgold");
dataSource.setUrl("jdbc:mysql://localhost:3306/edvNewRelease");
dataSource.setUsername("root");
Properties connectionProperties = new Properties();
connectionProperties.setProperty("autoReconnect", "true");
connectionProperties.setProperty("maxActive", "750");
connectionProperties.setProperty("maxIdle", "30");
connectionProperties.setProperty("useUnicode", "true");
connectionProperties.setProperty("characterEncoding", "utf8");
connectionProperties.setProperty("validationQuery", "Select 1");
connectionProperties.setProperty("maxWait", "10000");
dataSource.setConnectionProperties(connectionProperties);
return dataSource;
}