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如何在WebApp項目中實現嵌入式數據庫？所以，爲了測試我使用Tomcat的項目。有沒有一種方法可以在Web應用程序中擁有「本地」/獨立數據庫？DynamicWeb項目中的嵌入式數據庫
我的本地數據庫（db.script）：
SET DATABASE UNIQUE NAME HSQLDB56C1DBAB62
SET DATABASE GC 0
SET DATABASE DEFAULT RESULT MEMORY ROWS 0
SET DATABASE EVENT LOG LEVEL 0
SET DATABASE TRANSACTION CONTROL LOCKS
SET DATABASE DEFAULT ISOLATION LEVEL READ COMMITTED
SET DATABASE TRANSACTION ROLLBACK ON CONFLICT TRUE
SET DATABASE TEXT TABLE DEFAULTS ''
SET DATABASE SQL NAMES FALSE
SET DATABASE SQL REFERENCES FALSE
SET DATABASE SQL SIZE TRUE
SET DATABASE SQL TYPES FALSE
SET DATABASE SQL TDC DELETE TRUE
SET DATABASE SQL TDC UPDATE TRUE
SET DATABASE SQL TRANSLATE TTI TYPES TRUE
SET DATABASE SQL TRANSLATE TTI TYPES TRUE
SET DATABASE SQL CONCAT NULLS TRUE
SET DATABASE SQL UNIQUE NULLS TRUE
SET DATABASE SQL CONVERT TRUNCATE TRUE
SET DATABASE SQL AVG SCALE 0
SET DATABASE SQL DOUBLE NAN TRUE
SET FILES WRITE DELAY 500 MILLIS
SET FILES BACKUP INCREMENT TRUE
SET FILES CACHE SIZE 10000
SET FILES CACHE ROWS 50000
SET FILES SCALE 32
SET FILES LOB SCALE 32
SET FILES DEFRAG 0
SET FILES NIO TRUE
SET FILES NIO SIZE 256
SET FILES LOG TRUE
SET FILES LOG SIZE 50
CREATE USER "Chris" PASSWORD DIGEST '4a7d1ed414474e4033ac29ccb8653d9b'
ALTER USER "Chris" SET LOCAL TRUE
CREATE SCHEMA PUBLIC AUTHORIZATION DBA
SET SCHEMA PUBLIC
CREATE MEMORY TABLE PUBLIC.CUSTOMER(ID VARCHAR(20))
ALTER SEQUENCE SYSTEM_LOBS.LOB_ID RESTART WITH 1
SET DATABASE DEFAULT INITIAL SCHEMA PUBLIC
GRANT USAGE ON DOMAIN INFORMATION_SCHEMA.SQL_IDENTIFIER TO PUBLIC
GRANT USAGE ON DOMAIN INFORMATION_SCHEMA.YES_OR_NO TO PUBLIC
GRANT USAGE ON DOMAIN INFORMATION_SCHEMA.TIME_STAMP TO PUBLIC
GRANT USAGE ON DOMAIN INFORMATION_SCHEMA.CARDINAL_NUMBER TO PUBLIC
GRANT USAGE ON DOMAIN INFORMATION_SCHEMA.CHARACTER_DATA TO PUBLIC
GRANT DBA TO "Chris"
SET SCHEMA SYSTEM_LOBS
INSERT INTO BLOCKS VALUES(0,2147483647,0)
SET SCHEMA PUBLIC
INSERT INTO CUSTOMER VALUES('CHRIS')
這是我的Java類conenct到數據庫中（只是一個測試類）：
package jdbc;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
/**
* Dies Klasse liefert eine JDBC Connection zurück
* @author Christian
*
*/
public class JDBCConnector {
private Connection connection;
public JDBCConnector(String url, String user, String password){
try{
Class.forName("org.hsqldb.jdbcDriver");
connection = DriverManager.getConnection(url, user, password);
if(connection != null){
System.out.println("Verbindung hergestellt");
}
}catch (ClassNotFoundException e){
System.err.println("Der Datenbanktreiber konnte nicht geladen werden");
e.printStackTrace();
} catch (SQLException e) {
System.err.println("Beim Erstellen der Verbindung ist ein Feheler aufgetreten.\n"
+ "Bitte überprüfen Sie die URL, sowie Usernamen und Passwort");
}
}
public Connection getConnection() throws Exception{
if(connection != null){
return connection;
}else{
throw new Exception("Connection == null");
}
}
public String getFirstEntry(){
try {
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM CUSTOMER");
String s = "";
while(rs.next()){
s = rs.getString(1);
System.out.println("s: " + s);
}
return s;
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "";
}
}
這裏是JSP文件，被稱爲連接到數據庫：
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page import="jdbc.JDBCConnector" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<% JDBCConnector connector = new JDBCConnector("jdbc:hsqldb:file:/Gefaehrdungsbeurteilung_Full/gefaehrdungsbeurteilung_full/server/db/db", "Chris", "0000");
out.append(connector.getFirstEntry());
%>
</body>
</html>
如果我執行，我得到以下錯誤：
Verbindung hergestellt
java.sql.SQLSyntaxErrorException: user lacks privilege or object not found: CUSTOMER
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
at org.hsqldb.jdbc.JDBCStatement.fetchResult(Unknown Source)
at org.hsqldb.jdbc.JDBCStatement.executeQuery(Unknown Source)
at jdbc.JDBCConnector.getFirstEntry(JDBCConnector.java:45)
at org.apache.jsp.gefaehrdungsbeurteilung_005ffull.server.jsp.Access_jsp._jspService(Access_jsp.java:121)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Caused by: org.hsqldb.HsqlException: user lacks privilege or object not found: CUSTOMER
at org.hsqldb.error.Error.error(Unknown Source)
at org.hsqldb.error.Error.error(Unknown Source)
at org.hsqldb.ParserDQL.readTableName(Unknown Source)
at org.hsqldb.ParserDQL.readTableOrSubquery(Unknown Source)
at org.hsqldb.ParserDQL.XreadTableReference(Unknown Source)
at org.hsqldb.ParserDQL.XreadFromClause(Unknown Source)
at org.hsqldb.ParserDQL.XreadTableExpression(Unknown Source)
at org.hsqldb.ParserDQL.XreadQuerySpecification(Unknown Source)
at org.hsqldb.ParserDQL.XreadSimpleTable(Unknown Source)
at org.hsqldb.ParserDQL.XreadQueryPrimary(Unknown Source)
at org.hsqldb.ParserDQL.XreadQueryTerm(Unknown Source)
at org.hsqldb.ParserDQL.XreadQueryExpressionBody(Unknown Source)
at org.hsqldb.ParserDQL.XreadQueryExpression(Unknown Source)
at org.hsqldb.ParserDQL.compileCursorSpecification(Unknown Source)
at org.hsqldb.ParserCommand.compilePart(Unknown Source)
at org.hsqldb.ParserCommand.compileStatements(Unknown Source)
at org.hsqldb.Session.executeDirectStatement(Unknown Source)
at org.hsqldb.Session.execute(Unknown Source)
... 31 more
的路徑必須是正確的，因爲當我添加http://localhost:8080/Gefaehrdungsbeurteilung_Full/gefaehrdungsbeurteilung_full/server/db/db.script我看到腳本文件。並在腳本文件中，您看到該客戶被聲明...
Gefaehrdungsbeurteilung_Full/gefaehrdungsbeurteilung_full/server/db/db.script位於何處？ –
在webcontent下，然後選擇路徑gefaehrdungsbeurteilung_full/sever/db /。 – Chris