column can not be re-read 问题的解决办法

本文分享了使用JDBC连接MS SQL Server 2000时,出现column can not be re-read问题的解决方法。作者在JSP页面运行时遇到该错误,经排查发现是通过JDBC访问数据库列的顺序与表中列顺序不一致导致,将访问顺序调整后问题解决。

我觉得有必要在这里分享一下我得到解决关于 column can not be re-read 的问题,尽管这篇文章是受网上一篇文章的影响而发
jsp 页面:

view_edit.jsp
1 <jsp:useBean id="listType" class="net.inber.ViewListType" scope="page"/>
2 <jsp:useBean id="ls" class="net.inber.ListsBean" scope="page"/>
3 <%
4 String listsId=request.getParameter("id");
5 Lists lists=ls.getListsInfo(listsId);
6 %>

ListsBean 的部分代码:

21 public Lists getListsInfo(String listsId)throws Exception
22 {
23  
24  Statement stmts=con.createStatement();
25  ResultSet rsts=stmts.executeQuery("select * from list_table where id='"+listsId+"'");
26  Lists lists=null;
27  while(rsts.next())
28  {
29   
30   
31
32   lists=new Lists();
33
34   lists.setItemName(rsts.getString("item_name")); 
35   lists.setListTypeId(rsts.getString("list_type_id"));

   
  }
  return lists;
 } 
问题:
我一运行view_edit.jsp就出现如下错误:

[Microsoft][SQLServer 2000 Driver for JDBC]ResultSet can not re-read row data for column 2

开始我以为是1,2,行的bean和第5行的bean发生冲突,后来检查没有问题。。。郁闷得很。。
于是搜索一下baidu 受一文章启发

问题原因:34行item_name 和35行 list_type_id 在数据库中的位置 是list_type_id,item_name 在javabean中通过jdbc访问顺序不对就会再现些问题

解决办法将 34和35对换一下位置编译运行通过!!!
希望您尽快找到这篇文章并对您有所帮助---InberKong


引用原来出处:
利用JDBC连接MS SQL Ser2000+sp2  您要打印的文件是:利用JDBC连接MS SQL
                  Ser2000+sp2  打印本文


      利用JDBC连接MS SQL Ser2000+sp2

      作者:佚名    转贴自:本站原创    点击数:8


            我在学习j2ee的时候使用jdbc连接过ms sql server
            2000,开始的时候一切都正常,但是后来遇到了一个很头痛的问题,就是我们在从表中读取数据放到ResultSet中后,读取列值的时候一定的按照列的顺序读取。

              比如如果表中有三列id, name, address,按条件查询得到的结果放到ResultSet中,显示结果时如果这样写代码:


                    java.sql.ResultSet employees;
                    while(employees.next()){
                    employees.getString(address);
                    employees.getString(name);
                    }


              在运行的时候将会column can not be re-read错误,此时把两条语句颠倒就好了(此条只适用于连接MS SQL
            Server 2000)
              连接数据库代码如下:

                    try {
                    Class.forName(com.microsoft.jdbc.sqlserver.SQLServerDriver);
                    conn =
                    DriverManager.getConnection(
                    jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=Hotel;User=sa;Password=sa);
                    //   Class.forName(sun.jdbc.odbc.JdbcOdbcDriver);
                    //   conn = DriverManager.getConnection(jdbc:odbc:hotel);
                    } catch (SQLException e) {
                    System.err.println(e);
                    } catch (ClassNotFoundException e) {
                    System.err.println(e);
                    }

mysql Ver 14.14 Distrib 5.7.18, for Win64 (x86_64) Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Usage: mysql [OPTIONS] [database] -?, --help Display this help and exit. -I, --help Synonym for -? --auto-rehash Enable automatic rehashing. One doesn't need to use 'rehash' to get table and field completion, but startup and reconnecting may take a longer time. Disable with --disable-auto-rehash. (Defaults to on; use --skip-auto-rehash to disable.) -A, --no-auto-rehash No automatic rehashing. One has to use 'rehash' to get table and field completion. This gives a quicker start of mysql and disables rehashing on reconnect. --auto-vertical-output Automatically switch to vertical output mode if the result is wider than the terminal width. -B, --batch Don't use history file. Disable interactive behavior. (Enables --silent.) --bind-address=name IP address to bind to. --character-sets-dir=name Directory for character set files. --column-type-info Display column type information. -c, --comments Preserve comments. Send comments to the server. The default is --skip-comments (discard comments), enable with --comments. -C, --compress Use compression in server/client protocol. -#, --debug[=#] This is a non-debug version. Catch this and exit. --debug-check This is a non-debug version. Catch this and exit. -T, --debug-info This is a non-debug version. Catch this and exit. -D, --database=name Database to use. --default-character-set=name Set the default character set. --delimiter=name Delimiter to be used. --enable-cleartext-plugin Enable/disable the clear text authentication plugin. -e, --execute=name Execute command and quit. (Disables --force and history file.) -E, --vertical Print the output of a query (rows) vertically. -f, --force Continue even if we get an SQL error. --histignore=name A colon-separated list of patterns to keep statements from getting logged into syslog and mysql history. -G, --named-commands Enable named commands. Named commands mean this program's internal commands; see mysql> help . When enabled, the named commands can be used from any line of the query, otherwise only from the first line, before an enter. Disable with --disable-named-commands. This option is disabled by default. -i, --ignore-spaces Ignore space after function names. --init-command=name SQL Command to execute when connecting to MySQL server. Will automatically be re-executed when reconnecting. --local-infile Enable/disable LOAD DATA LOCAL INFILE. -b, --no-beep Turn off beep on error. -h, --host=name Connect to host. -H, --html Produce HTML output. -X, --xml Produce XML output. --line-numbers Write line numbers for errors. (Defaults to on; use --skip-line-numbers to disable.) -L, --skip-line-numbers Don't write line number for errors. -n, --unbuffered Flush buffer after each query. --column-names Write column names in results. (Defaults to on; use --skip-column-names to disable.) -N, --skip-column-names Don't write column names in results. --sigint-ignore Ignore SIGINT (CTRL-C). -o, --one-database Ignore statements except those that occur while the default database is the one named at the command line. -p, --password[=name] Password to use when connecting to server. If password is not given it's asked from the tty. -W, --pipe Use named pipes to connect to server. -P, --port=# Port number to use for connection or 0 for default to, in order of preference, my.cnf, $MYSQL_TCP_PORT, /etc/services, built-in default (3306). --prompt=name Set the mysql prompt to this value. --protocol=name The protocol to use for connection (tcp, socket, pipe, memory). -q, --quick Don't cache result, print it row by row. This may slow down the server if the output is suspended. Doesn't use history file. -r, --raw Write fields without conversion. Used with --batch. --reconnect Reconnect if the connection is lost. Disable with --disable-reconnect. This option is enabled by default. (Defaults to on; use --skip-reconnect to disable.) -s, --silent Be more silent. Print results with a tab as separator, each row on new line. --shared-memory-base-name=name Base name of shared memory. -S, --socket=name The socket file to use for connection. --ssl-mode=name SSL connection mode. --ssl Deprecated. Use --ssl-mode instead. (Defaults to on; use --skip-ssl to disable.) --ssl-verify-server-cert Deprecated. Use --ssl-mode=VERIFY_IDENTITY instead. --ssl-ca=name CA file in PEM format. --ssl-capath=name CA directory. --ssl-cert=name X509 cert in PEM format. --ssl-cipher=name SSL cipher to use. --ssl-key=name X509 key in PEM format. --ssl-crl=name Certificate revocation list. --ssl-crlpath=name Certificate revocation list path. --tls-version=name TLS version to use, permitted values are: TLSv1, TLSv1.1 -t, --table Output in table format. --tee=name Append everything into outfile. See interactive help (\h) also. Does not work in batch mode. Disable with --disable-tee. This option is disabled by default. -u, --user=name User for login if not current user. -U, --safe-updates Only allow UPDATE and DELETE that uses keys. -U, --i-am-a-dummy Synonym for option --safe-updates, -U. -v, --verbose Write more. (-v -v -v gives the table output format). -V, --version Output version information and exit. -w, --wait Wait and retry if connection is down. --connect-timeout=# Number of seconds before connection timeout. --max-allowed-packet=# The maximum packet length to send to or receive from server. --net-buffer-length=# The buffer size for TCP/IP and socket communication. --select-limit=# Automatic limit for SELECT when using --safe-updates. --max-join-size=# Automatic limit for rows in a join when using --safe-updates. --secure-auth Refuse client connecting to server if it uses old (pre-4.1.1) protocol. Deprecated. Always TRUE --server-arg=name Send embedded server this as a parameter. --show-warnings Show warnings after every statement. -j, --syslog Log filtered interactive commands to syslog. Filtering of commands depends on the patterns supplied via histignore option besides the default patterns. --plugin-dir=name Directory for client-side plugins. --default-auth=name Default authentication client-side plugin to use. --binary-mode By default, ASCII '\0' is disallowed and '\r\n' is translated to '\n'. This switch turns off both features, and also turns off parsing of all clientcommands except \C and DELIMITER, in non-interactive mode (for input piped to mysql or loaded using the 'source' command). This is necessary when processing output from mysqlbinlog that may contain blobs. --connect-expired-password Notify the server that this client is prepared to handle expired password sandbox mode. Default options are read from the following files in the given order: C:\WINDOWS\my.ini C:\WINDOWS\my.cnf C:\my.ini C:\my.cnf D:\mysql\mysql-5.7.18-winx64\mysql-5.7.18-winx64\my.ini D:\mysql\mysql-5.7.18-winx64\mysql-5.7.18-winx64\my.cnf The following groups are read: mysql client The following options may be given as the first argument: --print-defaults Print the program argument list and exit. --no-defaults Don't read default options from any option file, except for login file. --defaults-file=# Only read default options from the given file #. --defaults-extra-file=# Read this file after the global files are read. --defaults-group-suffix=# Also read groups with concat(group, suffix) --login-path=# Read this path from the login file. Variables (--variable-name=value) and boolean options {FALSE|TRUE} Value (after reading options) --------------------------------- ---------------------------------------- auto-rehash TRUE auto-vertical-output FALSE bind-address (No default value) character-sets-dir (No default value) column-type-info FALSE comments FALSE compress FALSE database (No default value) default-character-set utf8 delimiter ; enable-cleartext-plugin FALSE vertical FALSE force FALSE histignore (No default value) named-commands FALSE ignore-spaces FALSE init-command (No default value) local-infile FALSE no-beep FALSE host (No default value) html FALSE xml FALSE line-numbers TRUE unbuffered FALSE column-names TRUE sigint-ignore FALSE port 3306 prompt mysql> quick FALSE raw FALSE reconnect TRUE shared-memory-base-name (No default value) socket (No default value) ssl TRUE ssl-verify-server-cert FALSE ssl-ca (No default value) ssl-capath (No default value) ssl-cert (No default value) ssl-cipher (No default value) ssl-key (No default value) ssl-crl (No default value) ssl-crlpath (No default value) tls-version (No default value) table FALSE user (No default value) safe-updates FALSE i-am-a-dummy FALSE connect-timeout 0 max-allowed-packet 16777216 net-buffer-length 16384 select-limit 1000 max-join-size 1000000 secure-auth TRUE show-warnings FALSE plugin-dir (No default value) default-auth (No default value) binary-mode FALSE connect-expired-password FALSE C:\Users\lenovo>mysql –u root –p mysql Ver 14.14 Distrib 5.7.18, for Win64 (x86_64) Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Usage: mysql [OPTIONS] [database] -?, --help Display this help and exit. -I, --help Synonym for -? --auto-rehash Enable automatic rehashing. One doesn't need to use 'rehash' to get table and field completion, but startup and reconnecting may take a longer time. Disable with --disable-auto-rehash. (Defaults to on; use --skip-auto-rehash to disable.) -A, --no-auto-rehash No automatic rehashing. One has to use 'rehash' to get table and field completion. This gives a quicker start of mysql and disables rehashing on reconnect. --auto-vertical-output Automatically switch to vertical output mode if the result is wider than the terminal width. -B, --batch Don't use history file. Disable interactive behavior. (Enables --silent.) --bind-address=name IP address to bind to. --character-sets-dir=name Directory for character set files. --column-type-info Display column type information. -c, --comments Preserve comments. Send comments to the server. The default is --skip-comments (discard comments), enable with --comments. -C, --compress Use compression in server/client protocol. -#, --debug[=#] This is a non-debug version. Catch this and exit. --debug-check This is a non-debug version. Catch this and exit. -T, --debug-info This is a non-debug version. Catch this and exit. -D, --database=name Database to use. --default-character-set=name Set the default character set. --delimiter=name Delimiter to be used. --enable-cleartext-plugin Enable/disable the clear text authentication plugin. -e, --execute=name Execute command and quit. (Disables --force and history file.) -E, --vertical Print the output of a query (rows) vertically. -f, --force Continue even if we get an SQL error. --histignore=name A colon-separated list of patterns to keep statements from getting logged into syslog and mysql history. -G, --named-commands Enable named commands. Named commands mean this program's internal commands; see mysql> help . When enabled, the named commands can be used from any line of the query, otherwise only from the first line, before an enter. Disable with --disable-named-commands. This option is disabled by default. -i, --ignore-spaces Ignore space after function names. --init-command=name SQL Command to execute when connecting to MySQL server. Will automatically be re-executed when reconnecting. --local-infile Enable/disable LOAD DATA LOCAL INFILE. -b, --no-beep Turn off beep on error. -h, --host=name Connect to host. -H, --html Produce HTML output. -X, --xml Produce XML output. --line-numbers Write line numbers for errors. (Defaults to on; use --skip-line-numbers to disable.) -L, --skip-line-numbers Don't write line number for errors. -n, --unbuffered Flush buffer after each query. --column-names Write column names in results. (Defaults to on; use --skip-column-names to disable.) -N, --skip-column-names Don't write column names in results. --sigint-ignore Ignore SIGINT (CTRL-C). -o, --one-database Ignore statements except those that occur while the default database is the one named at the command line. -p, --password[=name] Password to use when connecting to server. If password is not given it's asked from the tty. -W, --pipe Use named pipes to connect to server. -P, --port=# Port number to use for connection or 0 for default to, in order of preference, my.cnf, $MYSQL_TCP_PORT, /etc/services, built-in default (3306). --prompt=name Set the mysql prompt to this value. --protocol=name The protocol to use for connection (tcp, socket, pipe, memory). -q, --quick Don't cache result, print it row by row. This may slow down the server if the output is suspended. Doesn't use history file. -r, --raw Write fields without conversion. Used with --batch. --reconnect Reconnect if the connection is lost. Disable with --disable-reconnect. This option is enabled by default. (Defaults to on; use --skip-reconnect to disable.) -s, --silent Be more silent. Print results with a tab as separator, each row on new line. --shared-memory-base-name=name Base name of shared memory. -S, --socket=name The socket file to use for connection. --ssl-mode=name SSL connection mode. --ssl Deprecated. Use --ssl-mode instead. (Defaults to on; use --skip-ssl to disable.) --ssl-verify-server-cert Deprecated. Use --ssl-mode=VERIFY_IDENTITY instead. --ssl-ca=name CA file in PEM format. --ssl-capath=name CA directory. --ssl-cert=name X509 cert in PEM format. --ssl-cipher=name SSL cipher to use. --ssl-key=name X509 key in PEM format. --ssl-crl=name Certificate revocation list. --ssl-crlpath=name Certificate revocation list path. --tls-version=name TLS version to use, permitted values are: TLSv1, TLSv1.1 -t, --table Output in table format. --tee=name Append everything into outfile. See interactive help (\h) also. Does not work in batch mode. Disable with --disable-tee. This option is disabled by default. -u, --user=name User for login if not current user. -U, --safe-updates Only allow UPDATE and DELETE that uses keys. -U, --i-am-a-dummy Synonym for option --safe-updates, -U. -v, --verbose Write more. (-v -v -v gives the table output format). -V, --version Output version information and exit. -w, --wait Wait and retry if connection is down. --connect-timeout=# Number of seconds before connection timeout. --max-allowed-packet=# The maximum packet length to send to or receive from server. --net-buffer-length=# The buffer size for TCP/IP and socket communication. --select-limit=# Automatic limit for SELECT when using --safe-updates. --max-join-size=# Automatic limit for rows in a join when using --safe-updates. --secure-auth Refuse client connecting to server if it uses old (pre-4.1.1) protocol. Deprecated. Always TRUE --server-arg=name Send embedded server this as a parameter. --show-warnings Show warnings after every statement. -j, --syslog Log filtered interactive commands to syslog. Filtering of commands depends on the patterns supplied via histignore option besides the default patterns. --plugin-dir=name Directory for client-side plugins. --default-auth=name Default authentication client-side plugin to use. --binary-mode By default, ASCII '\0' is disallowed and '\r\n' is translated to '\n'. This switch turns off both features, and also turns off parsing of all clientcommands except \C and DELIMITER, in non-interactive mode (for input piped to mysql or loaded using the 'source' command). This is necessary when processing output from mysqlbinlog that may contain blobs. --connect-expired-password Notify the server that this client is prepared to handle expired password sandbox mode. Default options are read from the following files in the given order: C:\WINDOWS\my.ini C:\WINDOWS\my.cnf C:\my.ini C:\my.cnf D:\mysql\mysql-5.7.18-winx64\mysql-5.7.18-winx64\my.ini D:\mysql\mysql-5.7.18-winx64\mysql-5.7.18-winx64\my.cnf The following groups are read: mysql client The following options may be given as the first argument: --print-defaults Print the program argument list and exit. --no-defaults Don't read default options from any option file, except for login file. --defaults-file=# Only read default options from the given file #. --defaults-extra-file=# Read this file after the global files are read. --defaults-group-suffix=# Also read groups with concat(group, suffix) --login-path=# Read this path from the login file. Variables (--variable-name=value) and boolean options {FALSE|TRUE} Value (after reading options) --------------------------------- ---------------------------------------- auto-rehash TRUE auto-vertical-output FALSE bind-address (No default value) character-sets-dir (No default value) column-type-info FALSE comments FALSE compress FALSE database (No default value) default-character-set utf8 delimiter ; enable-cleartext-plugin FALSE vertical FALSE force FALSE histignore (No default value) named-commands FALSE ignore-spaces FALSE init-command (No default value) local-infile FALSE no-beep FALSE host (No default value) html FALSE xml FALSE line-numbers TRUE unbuffered FALSE column-names TRUE sigint-ignore FALSE port 3306 prompt mysql> quick FALSE raw FALSE reconnect TRUE shared-memory-base-name (No default value) socket (No default value) ssl TRUE ssl-verify-server-cert FALSE ssl-ca (No default value) ssl-capath (No default value) ssl-cert (No default value) ssl-cipher (No default value) ssl-key (No default value) ssl-crl (No default value) ssl-crlpath (No default value) tls-version (No default value) table FALSE user (No default value) safe-updates FALSE i-am-a-dummy FALSE connect-timeout 0 max-allowed-packet 16777216 net-buffer-length 16384 select-limit 1000 max-join-size 1000000 secure-auth TRUE show-warnings FALSE plugin-dir (No default value) default-auth (No default value) binary-mode FALSE connect-expired-password FALSE C:\Users\lenovo>
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06-23
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