我正在使用sqlite（版本3.7.5）和http://www.xerial.org/trac/Xerial/wiki/SQLiteJDBC提供的sqlite jdbc驱动程序
几个月前，我在xerial论坛（http://groups.google.com/group/xerial/browse_thread/thread/ee19bd855e282f9c）上提出了一个几乎完全相同的问题，但从未得到任何回复。当我自己构建共享库sqlite.dll / libsqlite.so时，我的示例在Linux上正常工作（opensuse 64位），但在Windows XP专业版32位上无法正常工作。
但是，如果我使用sqlite.org网站（http://sqlite.org/sqlite-dll-win32-x86-3070500.zip）提供的共享库或者与jdbc驱动程序捆绑在一起的共享库（ http://www.xerial.org/maven/repository/artifact/org/xerial/sqlite-jdbc/3.7.2/sqlite-jdbc-3.7.2.jar），它在Linux和Windows上运行良好。< / p>
因此我猜测我没有正确构建sqlite库。我正在使用带有Microsoft Platform SDK的cygwin环境来构建sqlite。我使用以下命令集在Windows XP 32位上创建sqlite库。
mycl -32 -O2 / D“NDEBUG”/ MD / D“_WIN32”/ D“_WINDOWS”/ D“_MBCS”/ D“_USRDLL”/ D“SQLITE_ENABLE_COLUMN_METADATA”/ D“SQLITE_ENABLE_FTS3”/ D“SQLITE_THREADSAFE = 1“-c NativeDB.c -o NativeDB.o
mycl -32 -O2 / D“NDEBUG”/ MD / D“_WIN32”/ D“_WINDOWS”/ D“_MBCS”/ D“_USRDLL”/ D“SQLITE_ENABLE_COLUMN_METADATA”/ D“SQLITE_ENABLE_FTS3”/ D“SQLITE_THREADSAFE = 1“-c sqlite3.c -o sqlite3.o
mylink -32 / DLL /lpathpath:../lib/Win32 /out:sqlite.dll NativeDB.o sqlite3.o gdi32.lib vfw32.lib user32.lib comdlg32.lib comctl32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib wbemuuid.lib netapi32.lib ws2_32.lib kernel32.lib
mymt -32 / manifest sqlite.dll.manifest /outputresource：sqlite.dll';＃2'
（mycl，mylink和mymt是原始cl.exe，link.exe和mt.exe的包装器，用于转换命令行参数。它们可以与我用它们构建的许多其他项目一起使用。）
我还创建了一个SSCE来演示这个问题。
package org.sqlite;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class MainDriver {
public static void main(String[] args) {
new MainDriver();
}
public MainDriver() {
//Buffers to read and write
byte[] writeBuffer = new byte[10];
byte[] readBuffer = null;
for (int i = 1; i < 10; i++) {
writeBuffer[i] = (byte)i;
}
//Database objects
Connection conn = null;
Statement stat = null;
PreparedStatement prep = null;
//Load the database driver
try {
System.loadLibrary("sqlite");
Class.forName("org.sqlite.JDBC");
} catch (Exception e) {
System.err.println("Could not load sqlite library or instantiate the database driver.");
System.err.println(e);
e.printStackTrace();
return;
}
//Open a connection to the database
try {
conn = DriverManager.getConnection("jdbc:sqlite:" + "file.db");
} catch (SQLException e) {
System.err.println("Could not open a connection to the database with name file.db");
System.err.println(e);
e.printStackTrace();
return;
}
//Create a table
try {
stat = conn.createStatement();
stat.execute("CREATE TABLE TEST (model BLOB NOT NULL)");
stat.close();
} catch (SQLException e) {
System.err.println("The table could not be created.");
System.err.println(e);
e.printStackTrace();
return;
}
//Write buffer into the database
try {
conn.setAutoCommit(false);
prep = conn.prepareStatement("INSERT INTO TEST (model) VALUES(?)");
prep.setBytes(1, writeBuffer);
prep.addBatch();
prep.executeBatch();
conn.setAutoCommit(true);
prep.close();
} catch (SQLException e) {
System.err.println("The buffer could not be written to the database.");
System.err.println(e);
e.printStackTrace();
return;
}
//Read buffer from the database
try {
stat = conn.createStatement();
ResultSet rs = stat.executeQuery("SELECT * FROM TEST");
readBuffer = rs.getBytes(1);
rs.close();
stat.close();
} catch (SQLException e) {
System.err.println("The buffer could not be read");
System.err.println(e);
e.printStackTrace();
}
//Close the database
try {
conn.close();
} catch (SQLException e) {
System.err.println("Database could not be closed");
System.err.println(e);
e.printStackTrace();
}
//Print the buffers
System.out.print("Write buffer = ");
for (int i = 0; i < writeBuffer.length; i++) {
System.out.print(writeBuffer[i]);
}
System.out.println();
System.out.print("Read buffer = ");
for (int i = 0; i < readBuffer.length; i++) {
System.out.print(readBuffer[i]);
}
System.out.println();
//Check the md5sum
try {
java.security.MessageDigest digest = java.security.MessageDigest.getInstance("MD5");
byte[] md5sum = null;
java.math.BigInteger bigInt = null;
//Write buffer
digest.reset();
digest.update(writeBuffer);
md5sum = digest.digest();
bigInt = new java.math.BigInteger(1, md5sum);
System.out.println("MD5 checksum of write buffer = " + bigInt.toString(16));
//Read buffer
digest.reset();
digest.update(readBuffer);
md5sum = digest.digest();
bigInt = new java.math.BigInteger(1, md5sum);
System.out.println("MD5 checksum of read buffer = " + bigInt.toString(16));
} catch (Exception e) {
System.err.println("MD5 checksum not available");
return;
}
}
}
我还尝试使用ICU unicode库（版本4.4.2）构建sqlite。我使用以下命令来构建具有unicode支持的sqlite。
cl.exe -32 -O2 / D“NDEBUG”/ MD / D“_WIN32”/ D“_WINDOWS”/ D“_MBCS”/ D“_USRDLL”/ D“SQLITE_ENABLE_COLUMN_METADATA”/ D“SQLITE_ENABLE_FTS3”/ D“ SQLITE_THREADSAFE = 1“/ D”SQLITE_ENABLE_ICU“-I ../ external / icu / win32 / include -I ../ include -c NativeDB.c -o NativeDB.o
cl.exe -32 -O2 / D“NDEBUG”/ MD / D“_WIN32”/ D“_WINDOWS”/ D“_MBCS”/ D“_USRDLL”/ D“SQLITE_ENABLE_COLUMN_METADATA”/ D“SQLITE_ENABLE_FTS3”/ D“ SQLITE_THREADSAFE = 1“/ D”SQLITE_ENABLE_ICU“-I ../ external / icu / win32 / include -I ../ include -c sqlite3.c -o sqlite3.o
link.exe -32 / DLL /libpath:../external/icu/win32/lib /out:sqlite.dll NativeDB.o sqlite3.o icuuc.lib icuin.lib gdi32.lib vfw32.lib user32.lib comdlg32.lib comctl32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib wbemuuid.lib netapi32.lib ws2_32.lib kernel32.lib
mt.exe -32 / manifest sqlite.dll.manifest /outputresource：sqlite.dll';＃2'
使用/不使用unicode构建无效。我仍然无法解决问题。我将非常感谢任何帮助或指向可能的解决方案/解决方法。
答案 0 :(得分：0)
我终于解决了这个问题。罪魁祸首是Visual Studio 6自动添加的“NDEBUG”标志。以下命令集正确构建了sqlite库（构建环境是Microsoft Windows SDK v6.1 - 2008年发布）。
cl.exe / O2 / GL / D“WIN32”/ D“_WINDLL”/ D“_UNICODE”/ D“UNICODE”/ MD / W3 / c / Wp64 / TC / D“SQLITE_ENABLE_COLUMN_METADATA”/ D“SQLITE_ENABLE_FTS3” / D“SQLITE_THREADSAFE = 1”/ D“SQLITE_ENABLE_ICU”/ I“../external/icu/Win32/include”sqlite3.c
cl.exe / O2 / GL / D“WIN32”/ D“_DLL”/ D“_WINDLL”/ D“_UNICODE”/ D“UNICODE”/ MD / W3 / c / Wp64 / TC / D“SQLITE_ENABLE_COLUMN_METADATA” / D“SQLITE_ENABLE_FTS3”/ D“SQLITE_THREADSAFE = 1”/ D“SQLITE_ENABLE_ICU”NativeDB.c
link.exe / INCREMENTAL：NO / DLL / SUBSYSTEM：CONSOLE / OPT：REF / OPT：ICF / LTCG / MACHINE：X86 /LIBPATH:"../external/icu/Win32/lib“”/ out：sqlite .dll“NativeDB.obj sqlite3.obj icuuc.lib icuin.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib
mt.exe / manifest sqlite.dll.manifest /outputresource:sqlite.dll';#2'
我发布命令以防其他人可能遇到同样的问题。