我有一组转换原始数据集的 SQL 文件。目前,我打开每个文件并执行它。如何在 Java 程序中执行每个文件?目标是使这个过程更加自动化。
我想做类似的事情SqlScript.execute("myScript.sql");
注意这些 SQL 脚本作用于一个数据库。我想我必须传递某种连接字符串。我正在使用 MySQL。
- 我需要哪些对象、库、包等...在 Java 中执行此操作?
Ibatis提供了一个ScriptRunner可以帮助你。您可以参考的简单代码片段:
Connection conn=getConnection();//some method to get a Connection
ScriptRunner runner=new ScriptRunner(conn, false, false);
InputStreamReader reader = new InputStreamReader(new FileInputStream("foo.sql"));
runner.runScript(reader);
reader.close();
conn.close();
使用 iBatics 会更容易。
http://repo1.maven.org/maven2/org/mybatis/mybatis/3.2.3/mybatis-3.2.3.jar
此外,您需要MySQL java 驱动程序:com.mysql.jdbc.Driver,可以在 mysql 站点中找到。
import java.io.BufferedReader;
import java.io.FileReader;
import java.sql.DriverManager;
import org.apache.ibatis.jdbc.ScriptRunner;
public class Main {
public static void main(String[] args) {
String script = "scriptname.sql";
try {
Class.forName("com.mysql.jdbc.Driver");
new ScriptRunner(DriverManager.getConnection(
"jdbc:mysql://localhost:3306/mysql", "root", "root`"))
.runScript(new BufferedReader(new FileReader(script)));
} catch (Exception e) {
System.err.println(e);
}
}
}
您可以尝试以下方法:http ://www.tonyspencer.com/2005/01/20/execute-mysql-script-from-java/
public static String executeScript (String dbname, String dbuser,
String dbpassword, String scriptpath, boolean verbose) {
String output = null;
try {
String[] cmd = new String[]{"mysql",
dbname,
"--user=" + dbuser,
"--password=" + dbpassword,
"-e",
"\"source " + scriptpath + "\""
};
System.err.println(cmd[0] + " " + cmd[1] + " " +
cmd[2] + " " + cmd[3] + " " +
cmd[4] + " " + cmd[5]);
Process proc = Runtime.getRuntime().exec(cmd);
if (verbose) {
InputStream inputstream = proc.getInputStream();
InputStreamReader inputstreamreader = new InputStreamReader(inputstream);
BufferedReader bufferedreader = new BufferedReader(inputstreamreader);
// read the output
String line;
while ((line = bufferedreader.readLine()) != null) {
System.out.println(line);
}
// check for failure
try {
if (proc.waitFor() != 0) {
System.err.println("exit value = " +
proc.exitValue());
}
}
catch (InterruptedException e) {
System.err.println(e);
}
}
} catch (Exception e) {
e.printStackTrace();
}
return output;
}