public static void main(String[] args) {
for (int i = 0; i < 10; i++) System.out.println(UUID.randomUUID().toString().length());
}
/**
* 根据主键类型和主键的前缀生成表的主键
*
* @param type 表的主键类型
* @param prefix 表的主键前缀
* @return
* @throws SQLException
*/
public Sequence generateObjectKey(String type, String prefix, Connection con)
throws SQLException {
Sequence sequence = new Sequence();
if (type.equals("sequence")) // 不需要锁
{
long curValue = this.curValue;
// String sql = "select " + this.generator + ".nextval from dual";
do {
// PreparedDBUtil dbutil = new PreparedDBUtil();
try {
// dbutil.preparedSelect(this.dbname,sql);
// dbutil.executePrepared(con);
// curValue = dbutil.getLong(0,0);
// if(this.synsequece && this.exist(con,curValue))
// continue;
curValue = this.dbAdapter.getNextValue(this.seqfunction, generator, con, this.dbname);
if (this.synsequece && this.exist(con, curValue)) continue;
} catch (SQLException e) {
e.printStackTrace();
throw e;
}
// sequence.setPrimaryKey(new Long(curValue));
// sequence.setSequence(curValue);
// return sequence;
break;
} while (true);
this.curValue = curValue;
if (this.metaType.equals("int")
|| this.metaType.equals("java.lang.Integer")
|| this.metaType.equals("java.lang.integer")
|| this.metaType.equalsIgnoreCase("integer")) {
sequence.setPrimaryKey(new Long(curValue));
sequence.setSequence(curValue);
return sequence;
}
if (this.metaType.equals("java.lang.Long")
|| this.metaType.equals("java.lang.long")
|| this.metaType.equalsIgnoreCase("long")) {
sequence.setPrimaryKey(new Long(curValue));
sequence.setSequence(curValue);
return sequence;
}
if (this.metaType.equals("java.lang.String") || this.metaType.equalsIgnoreCase("string")) {
sequence.setPrimaryKey(this.prefix + curValue + "");
sequence.setSequence(curValue);
return sequence;
} else {
sequence.setPrimaryKey(this.prefix + curValue + "");
sequence.setSequence(curValue);
return sequence;
}
} else if (type.equals("uuid")) {
// UUID.randomUUID().toString();
sequence.setPrimaryKey(UUID.randomUUID().toString());
sequence.setSequence(this.curValue);
return sequence;
} else // 需要锁
{
synchronized (this) {
switch (keygenerator_mode) {
case 0: // 自动模式
curValue += increment;
break;
case 1:
curValue += increment;
synchroDB(con);
break;
}
if (this.metaType.equals("int")
|| this.metaType.equals("java.lang.Integer")
|| this.metaType.equals("java.lang.integer")
|| this.metaType.equalsIgnoreCase("integer")) {
sequence.setPrimaryKey(new Long(curValue));
sequence.setSequence(curValue);
return sequence;
}
if (this.metaType.equals("java.lang.Long")
|| this.metaType.equals("java.lang.long")
|| this.metaType.equalsIgnoreCase("long")) {
sequence.setPrimaryKey(new Long(curValue));
sequence.setSequence(curValue);
return sequence;
}
if (this.metaType.equals("java.lang.String") || this.metaType.equalsIgnoreCase("string")) {
sequence.setPrimaryKey(this.prefix + curValue + "");
sequence.setSequence(curValue);
return sequence;
} else {
sequence.setPrimaryKey(this.prefix + curValue + "");
sequence.setSequence(curValue);
return sequence;
}
}
}
// Sequence sequence = new Sequence();
// return curValue;
}