weka 连接数据库详细步骤

weka连接sqlserver或mysql步骤相同，只不过驱动和转换文件不同。

1、首先，下载weka，解压weka.jar；

2、找到weka\experiment 文件夹下的DatabaseUtils.props.mssqlserver（连接sqlserver）或DatabaseUtils.props.mysql（连接mysql）进行修改：

sqlserver驱动加载：
# JDBC driver (comma-separated list)
jdbcDriver=com.microsoft.jdbc.sqlserver.SQLServerDriver
　　数据库连接：

　　如果在本机上可以将server_name改为127.0.0.1或者localhost
# database URL
jdbcURL=jdbc:sqlserver://server_name:数据库名

mysql驱动加载：
# JDBC driver (comma-separated list)
jdbcDriver=org.gjt.mm.mysql.Driver
　　数据库连接：

# database URL
jdbcURL=jdbc:mysql://server_name:3306/数据库名

　　数据类型的转换：

　　由于weka仅支持名词型（nominal）、数值型（numeric）、字符串、日期（date）。所以我们要将现在数据库中的数据类型对应到这四种类型上来。

　　以下数据类型对应的句子前面的注释符合去掉。由于SQL Server2000有其他的数据类型Weka尚不能识别，所以我们在下面再添加上
smallint=3
datetime=8等等

string,getString()= 0; -->nominal
boolean,getBoolean() = 1; -->nominal
double,getDouble() = 2; -->numeric
byte,getByte() = 3; -->numeric
short,getByte()= 4; -->numeric
int,getInteger() = 5; -->numeric
long,getLong() = 6; -->numeric
gloat,getFloat() = 7; -->numeric
date,getDate() = 8; -->date
varchar=0
float=2
tinyint=3
int=5
其他说明，我们暂时用不到，不用去管了
# other options
CREATE_DOUBLE=DOUBLE PRECISION
CREATE_STRING=VARCHAR(8000)
CREATE_INT=INT
checkUpperCaseNames=false
checkLowerCaseNames=false
checkForTable=true

3、复制到主目录中并重命名为DatabaseUtils.props；

4、主目录中新建文件夹名为lib；下载驱动到lib中，如：sqljdbc或mysql-connector-java-5.1.39-bin

5、修改RunWeka.ini，在文件的最后修改为

#cp=%CLASSPATH%;F:\Weka-3-8\lib\mysql-connector-java-5.1.39-bin.jar（驱动的位置）

cp=%CLASSPATH%，保存；

6、配置环境，

“我的电脑”属性，设置环境变量

新建变量WEKA_HOME的安装目录，如（F:\Weka—3—8）在CLASSPATH变量中添加“；%WEKA_HOME%\lib\mysql-connector-java-5.1.39-bin.jar”

7、运行weka，进入explorer——>open DB

在URL框中输入：jdbcURL=jdbc:mysql://localhost:3306/数据库名（localhost是服务器名称，注：确保数据库存在）点击user：输入用户名和密码后，点击connect；如果下面的info框中，显示connecting to :jdbc:mysql://localhost:3306/数据库名=true,则连接成功；否则失败。

若失败，可在评论中说明，我会尽量解答。
MYSQL数据对照文件：
# Database settings for MySQL 3.23.x, 4.x
#
# General information on database access can be found here:
# http://weka.wikispaces.com/Databases #
# url: http://www.mysql.com/ # jdbc: http://www.mysql.com/products/connector/j/ # author: Fracpete (fracpete at waikato dot ac dot nz)
# version: $Revision: 11885 $

# JDBC driver (comma-separated list)
jdbcDriver=org.gjt.mm.mysql.Driver

# database URL
jdbcURL=jdbc:mysql://server_name:3306/lunwen

# specific data types
# string, getString() = 0; --> nominal
# boolean, getBoolean() = 1; --> nominal
# double, getDouble() = 2; --> numeric
# byte, getByte() = 3; --> numeric
# short, getByte()= 4; --> numeric
# int, getInteger() = 5; --> numeric
# long, getLong() = 6; --> numeric
# float, getFloat() = 7; --> numeric
# date, getDate() = 8; --> date
# text, getString() = 9; --> string
# time, getTime() = 10; --> date
# timestamp, getTime() = 11; --> date
TINYINT=3
SMALLINT=4
SHORT=5
INTEGER=5
INT=5
INT_UNSIGNED=6
BIGINT=6
LONG=6
REAL=7
NUMERIC=2
DECIMAL=2
FLOAT=2
DOUBLE=2
CHAR=0
TEXT=0
VARCHAR=0
LONGVARCHAR=9
BINARY=0
VARBINARY=0
LONGVARBINARY=9
BIT=1
BLOB=8
DATE=8
TIME=8
DATETIME=8
TIMESTAMP=8
# other options
CREATE_DOUBLE=DOUBLE
CREATE_STRING=TEXT
CREATE_INT=INT
CREATE_DATE=DATETIME
DateFormat=yyyy-MM-dd HH:mm:ss
checkUpperCaseNames=false
checkLowerCaseNames=false
checkForTable=true

# All the reserved keywords for this database
# Based on the keywords listed at the following URL (2009-04-13):
# http://dev.mysql.com/doc/mysqld-version-reference/en/mysqld-version-reference-reservedwords-5-0.html Keywords=\
ADD,\
ALL,\
ALTER,\
ANALYZE,\
AND,\
AS,\
ASC,\
ASENSITIVE,\
BEFORE,\
BETWEEN,\
BIGINT,\
BINARY,\
BLOB,\
BOTH,\
BY,\
CALL,\
CASCADE,\
CASE,\
CHANGE,\
CHAR,\
CHARACTER,\
CHECK,\
COLLATE,\
COLUMN,\
COLUMNS,\
CONDITION,\
CONNECTION,\
CONSTRAINT,\
CONTINUE,\
CONVERT,\
CREATE,\
CROSS,\
CURRENT_DATE,\
CURRENT_TIME,\
CURRENT_TIMESTAMP,\
CURRENT_USER,\
CURSOR,\
DATABASE,\
DATABASES,\
DAY_HOUR,\
DAY_MICROSECOND,\
DAY_MINUTE,\
DAY_SECOND,\
DEC,\
DECIMAL,\
DECLARE,\
DEFAULT,\
DELAYED,\
DELETE,\
DESC,\
DESCRIBE,\
DETERMINISTIC,\
DISTINCT,\
DISTINCTROW,\
DIV,\
DOUBLE,\
DROP,\
DUAL,\
EACH,\
ELSE,\
ELSEIF,\
ENCLOSED,\
ESCAPED,\
EXISTS,\
EXIT,\
EXPLAIN,\
FALSE,\
FETCH,\
FIELDS,\
FLOAT,\
FLOAT4,\
FLOAT8,\
FOR,\
FORCE,\
FOREIGN,\
FROM,\
FULLTEXT,\
GOTO,\
GRANT,\
GROUP,\
HAVING,\
HIGH_PRIORITY,\
HOUR_MICROSECOND,\
HOUR_MINUTE,\
HOUR_SECOND,\
IF,\
IGNORE,\
IN,\
INDEX,\
INFILE,\
INNER,\
INOUT,\
INSENSITIVE,\
INSERT,\
INT,\
INT1,\
INT2,\
INT3,\
INT4,\
INT8,\
INTEGER,\
INTERVAL,\
INTO,\
IS,\
ITERATE,\
JOIN,\
KEY,\
KEYS,\
KILL,\
LABEL,\
LEADING,\
LEAVE,\
LEFT,\
LIKE,\
LIMIT,\
LINES,\
LOAD,\
LOCALTIME,\
LOCALTIMESTAMP,\
LOCK,\
LONG,\
LONGBLOB,\
LONGTEXT,\
LOOP,\
LOW_PRIORITY,\
MATCH,\
MEDIUMBLOB,\
MEDIUMINT,\
MEDIUMTEXT,\
MIDDLEINT,\
MINUTE_MICROSECOND,\
MINUTE_SECOND,\
MOD,\
MODIFIES,\
NATURAL,\
NOT,\
NO_WRITE_TO_BINLOG,\
NULL,\
NUMERIC,\
ON,\
OPTIMIZE,\
OPTION,\
OPTIONALLY,\
OR,\
ORDER,\
OUT,\
OUTER,\
OUTFILE,\
PRECISION,\
PRIMARY,\
PRIVILEGES,\
PROCEDURE,\
PURGE,\
READ,\
READS,\
REAL,\
REFERENCES,\
REGEXP,\
RELEASE,\
RENAME,\
REPEAT,\
REPLACE,\
REQUIRE,\
RESTRICT,\
RETURN,\
REVOKE,\
RIGHT,\
RLIKE,\
SCHEMA,\
SCHEMAS,\
SECOND_MICROSECOND,\
SELECT,\
SENSITIVE,\
SEPARATOR,\
SET,\
SHOW,\
SMALLINT,\
SONAME,\
SPATIAL,\
SPECIFIC,\
SQL,\
SQLEXCEPTION,\
SQLSTATE,\
SQLWARNING,\
SQL_BIG_RESULT,\
SQL_CALC_FOUND_ROWS,\
SQL_SMALL_RESULT,\
SSL,\
STARTING,\
STRAIGHT_JOIN,\
TABLE,\
TABLES,\
TERMINATED,\
THEN,\
TINYBLOB,\
TINYINT,\
TINYTEXT,\
TO,\
TRAILING,\
TRIGGER,\
TRUE,\
UNDO,\
UNION,\
UNIQUE,\
UNLOCK,\
UNSIGNED,\
UPDATE,\
UPGRADE,\
USAGE,\
USE,\
USING,\
UTC_DATE,\
UTC_TIME,\
UTC_TIMESTAMP,\
VALUES,\
VARBINARY,\
VARCHAR,\
VARCHARACTER,\
VARYING,\
WHEN,\
WHERE,\
WHILE,\
WITH,\
WRITE,\
XOR,\
YEAR_MONTH,\
ZEROFILL

# The character to append to attribute names to avoid exceptions due to
# clashes between keywords and attribute names
KeywordsMaskChar=_

#flags for loading and saving instances using DatabaseLoader/Saver
nominalToStringLimit=50
idColumn=auto_generated_id