com.mysql.jdbc.MysqlDataTruncation: Data truncation: Out of range value adjusted for column 'price'
2011-08-25 14:44
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com.mysql.jdbc.MysqlDataTruncation: Data truncation: Out of range value adjusted for column 'price' at row 1
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3513)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3447)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1951)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2101)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2548)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1605)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1524)
at com.koubei.coupon.DataBaseDeal.insertData(DataBaseDeal.java:130)
at com.koubei.coupon.HttpRequestDemo.getAll(HttpRequestDemo.java:121)
at com.koubei.coupon.DailyGetEtaoData.run(DailyGetEtaoData.java:40)
at com.koubei.coupon.App.main(App.java:40)
错误的原因:不是因为float类型的数据太长,而是因为在数据库中设置的类型是unsigned无符号类型的。当插入的数据是负数(如-1.0)时就会报这样的错误。
下面是我为找float错误原因时,进行的测试:
我用试过几个数据,float型的整数支持很多位
String sf = "211111111111111111111111111111111111111111111111111112.000000000000";
float f = 0;
f = Float.parseFloat(sf);
System.out.println(f);
结果:211111111111111111111111111111111111111111111111111112.000000000000
Infinity
再测试
String sf = "211111111111111111111111222222255555552.000000000000";
float f = 0;
f = Float.parseFloat(sf);
System.out.println(f);
System.out.println(sf + " " + sf.length() + " " + sf.substring(0,sf.indexOf(".")).length());
结果:2.111111E38
211111111111111111111111222222255555552.000000000000 52 39
从这个测试中,我知道了,float型数据的整数部分的最长位数是39位。
String sf = "2.0000011";
float f = 0;
f = Float.parseFloat(sf);
System.out.println(f);
System.out.println(sf + " " + sf.length() + " " + sf.substring(0,sf.indexOf(".")).length());
结果:
2.0000012
2.0000011 9 1
小数点后最多位数是7位。最令人奇怪的是,我输入的是2.0000011,转换成float类型后,数据变成了2.0000012。这个不知道为什么?但是以后编程的时候要注意一些吧。
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3513)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3447)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1951)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2101)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2548)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1605)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1524)
at com.koubei.coupon.DataBaseDeal.insertData(DataBaseDeal.java:130)
at com.koubei.coupon.HttpRequestDemo.getAll(HttpRequestDemo.java:121)
at com.koubei.coupon.DailyGetEtaoData.run(DailyGetEtaoData.java:40)
at com.koubei.coupon.App.main(App.java:40)
错误的原因:不是因为float类型的数据太长,而是因为在数据库中设置的类型是unsigned无符号类型的。当插入的数据是负数(如-1.0)时就会报这样的错误。
下面是我为找float错误原因时,进行的测试:
我用试过几个数据,float型的整数支持很多位
String sf = "211111111111111111111111111111111111111111111111111112.000000000000";
float f = 0;
f = Float.parseFloat(sf);
System.out.println(f);
结果:211111111111111111111111111111111111111111111111111112.000000000000
Infinity
再测试
String sf = "211111111111111111111111222222255555552.000000000000";
float f = 0;
f = Float.parseFloat(sf);
System.out.println(f);
System.out.println(sf + " " + sf.length() + " " + sf.substring(0,sf.indexOf(".")).length());
结果:2.111111E38
211111111111111111111111222222255555552.000000000000 52 39
从这个测试中,我知道了,float型数据的整数部分的最长位数是39位。
String sf = "2.0000011";
float f = 0;
f = Float.parseFloat(sf);
System.out.println(f);
System.out.println(sf + " " + sf.length() + " " + sf.substring(0,sf.indexOf(".")).length());
结果:
2.0000012
2.0000011 9 1
小数点后最多位数是7位。最令人奇怪的是,我输入的是2.0000011,转换成float类型后,数据变成了2.0000012。这个不知道为什么?但是以后编程的时候要注意一些吧。
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