见底部得出结论：
我正在尝试使用schemacrawler来绘制sqlite数据库。我的设置：
我在安装schemacrawler的目录中，并使用此命令行：
stebro$ java -classpath lib/*:. schemacrawler.tools.sqlite.Main /Library/Application\ Support/MyApp/Data/MyApp.db -command="select count(*) from myTable" -infolevel=maximum
SchemaCrawler 10.5
Copyright (c) 2000-2013, Sualeh Fatehi.
SchemaCrawler is a database schema discovery and comprehension tool.
You can search for database schema objects using regular expressions,
and output the schema and data in a readable text format. You can find
potential schema design issues with lint. The output serves for
database documentation is designed to be diff-ed against other database
schemas. SchemaCrawler also generates schema diagrams.
password:
java.sql.SQLException: Could not connect to database, for user null
at schemacrawler.schemacrawler.BaseDatabaseConnectionOptions.getConnection(BaseDatabaseConnectionOptions.java:93)
at schemacrawler.schemacrawler.BaseDatabaseConnectionOptions.getConnection(BaseDatabaseConnectionOptions.java:70)
at schemacrawler.tools.commandline.SchemaCrawlerCommandLine.execute(SchemaCrawlerCommandLine.java:173)
at schemacrawler.tools.commandline.SchemaCrawlerMain.main(SchemaCrawlerMain.java:93)
at schemacrawler.tools.commandline.SchemaCrawlerMain.main(SchemaCrawlerMain.java:52)
at schemacrawler.tools.sqlite.Main.main(Main.java:43)
Caused by: java.lang.IllegalArgumentException: Insufficient parameters for database connection URL: missing [database]
at schemacrawler.schemacrawler.DatabaseConfigConnectionOptions.getConnectionUrl(DatabaseConfigConnectionOptions.java:73)
at schemacrawler.schemacrawler.BaseDatabaseConnectionOptions.getConnection(BaseDatabaseConnectionOptions.java:89)
... 5 more
如果我指定-password，我会得到相同的错误，并为-user指定各种值也是一样的。 Sqlite不需要用户/密码 - 为什么jdbc或schemacrawler要我一个？
附录：
这是一系列特定的命令，它们创建一个简单的数据库，然后尝试使用schemacrawler绘制它：
bash-3.2$ sqlite3 MyApp.db
sqlite3 MyApp.db
SQLite version 3.7.12 2012-04-03 19:43:07
Enter ".help" for instructions
Enter SQL statements terminated with a ";"
sqlite> create table smbtest(col1 integer, col2 integer);
create table smbtest(col1 integer, col2 integer);
sqlite> ^D
bash-3.2$ ~/bin/sunjava -classpath lib/*:. schemacrawler.tools.sqlite.Main -database=MyApp.db -infolevel=maximum -command=graph -outputformat=pdf -outputfile=myapp.pdf
SchemaCrawler 10.5
Copyright (c) 2000-2013, Sualeh Fatehi.
SchemaCrawler is a database schema discovery and comprehension tool.
You can search for database schema objects using regular expressions,
and output the schema and data in a readable text format. You can find
potential schema design issues with lint. The output serves for
database documentation is designed to be diff-ed against other database
schemas. SchemaCrawler also generates schema diagrams.
password:
Graphviz was not available to create the requested graph. Please reinstall
Graphviz, and make it available on the system PATH. Meanwhile, a .dot text file
has been created instead. This .dot file can be opened in any Graphviz file
viewer.
java.io.IOException: Cannot run program "dot": error=2, No such file or directory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1041)
at schemacrawler.tools.integration.graph.ProcessExecutor.execute(ProcessExecutor.java:124)
at schemacrawler.tools.integration.graph.GraphGenerator.generateDiagram(GraphGenerator.java:87)
at schemacrawler.tools.integration.graph.GraphExecutable.executeOn(GraphExecutable.java:123)
at schemacrawler.tools.executable.SchemaCrawlerExecutable.executeOn(SchemaCrawlerExecutable.java:87)
at schemacrawler.tools.executable.BaseExecutable.execute(BaseExecutable.java:77)
at schemacrawler.tools.commandline.SchemaCrawlerCommandLine.execute(SchemaCrawlerCommandLine.java:176)
at schemacrawler.tools.commandline.SchemaCrawlerMain.main(SchemaCrawlerMain.java:93)
at schemacrawler.tools.commandline.SchemaCrawlerMain.main(SchemaCrawlerMain.java:52)
at schemacrawler.tools.sqlite.Main.main(Main.java:43)
Caused by: java.io.IOException: error=2, No such file or directory
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:135)
at java.lang.ProcessImpl.start(ProcessImpl.java:130)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1022)
... 9 more
最后结论： 问题在于我的数据库的路径中有一个空格;没有反斜杠，双引号或单引号的组合，或两者都解决了问题。从与我的db文件相同的目录运行命令就可以了。空间问题可能是由于我不理解在bash中使用的正确转义序列 - 如果schemacrawler使用我的名字作为命令行的一部分产生其他进程，我可能必须双重转义空格。
然而，该应用程序确实继续询问我的密码，但只需按Enter键即可继续成功。
答案 0 :(得分：1)
史蒂夫，
您需要像这样指定数据库：
"-database=/Library/Application Support/MyApp/Data/MyApp.db"
注意双引号以允许数据库文件路径中的空格和-database命令行开关。我还删除了反斜杠，因为整个开关都用双引号括起来。
有关命令行的帮助，只需运行：
java -classpath lib/*:. schemacrawler.tools.sqlite.Main
Sualeh Fatehi，SchemaCrawler
答案 1 :(得分：1)
使用SchemaCrawler生成DB Schema ER图我们可以使用SchemaCrawler可视化我们的数据库模式从这里下载最新的包： https://github.com/sualeh/SchemaCrawler/releases/
复制_schemacrawler文件夹并将其重命名为schemacrawler到另一个位置，并将其相同的目录路径添加到PATH使用GraphViz创建架构图http://sualeh.github.io/SchemaCrawler/diagramming.html
cd进入schemacrawler目录并使用如下所述的选项运行./schemacrawler.sh(on mac和ubuntu env）。
您可以运行sample命令以获取postgre db的png图像形式的架构图：
./schemacrawler.sh -command graph -outputformat png -outputfile=dh_er.png -loglevel=CONFIG -server=postgresql -host=localhost -port=5432 -database=testdb -user=testuser -password=testpass -infolevel=standard
包含/排除您需要定义配置的一些表 在schemacrawler.config.properties中作为示例：
schemacrawler.table.pattern.include=.*askbot_activityauditstatus |.*askbot_anonymousanswer|.*askbot_anonymousquestion |.*askbot_askwidget|.*askbot_badgedata|.*askbot_bulktagsubscription |.*askbot_bulktagsubscription_groups|.*askbot_bulktagsubscription_tags
schemacrawler.table.pattern.exclude是关键。值相同的是JAVA正则表达式
注意：如果您正面临＆＃34; SERVICE：无法运行程序＆＃34; dot＆＃34;：error = 2，没有这样的文件或目录＆＃34;问题...
Please install below(for mac only):
Install the app : brew install graphviz
答案 2 :(得分：0)
我认为您没有正确指定-classpath。我认为你需要一个围绕该命令的包装器shell脚本来扩展.jar中的每个lib，以便用:个字符分隔：
#!/bin/sh
classpath="."
for j in lib/*.jar
do
classpath=$classpath:$j
done
java -classpath $classpath schemacrawler.tools.sqlite.Main /Library/Application\ Support/MyApp/Data/MyApp.db -command="select count(*) from myTable" -infolevel=maximum
只是一个黑暗中的刺，但这就是我一直这样做的方式。显然，如果还必须包含非jar类路径，这会更复杂......