我是数据库的初学者，因为我现在切换到Intellij想法我正在尝试获取数据库信息，但它仍然给我这个错误：
"C:\Program Files\Java\jdk1.8.0\bin\java" -Didea.launcher.port=7535 "-Didea.launcher.bin.path=C:\Program Files\JetBrains\IntelliJ IDEA 13.1.1\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\rt.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\access-bridge.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0\jre\lib\ext\zipfs.jar;C:\Users\Raj\IdeaProjects\untitled11\out\production\untitled11;C:\Program Files\JetBrains\IntelliJ IDEA 13.1.1\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain JdbcSelectTest
java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:9999/ebookshop
at java.sql.DriverManager.getConnection(DriverManager.java:689)
at java.sql.DriverManager.getConnection(DriverManager.java:247)
at JdbcSelectTest.main(JdbcSelectTest.java:10)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Process finished with exit code 0
这是我的JdbcSelectTest.java代码：
import java.sql.*; // Use classes in java.sql package
// JDK 6 and above
public class JdbcSelectTest { // Save as JdbcSelectTest.java
public static void main(String[] args) {
Connection conn = null;
Statement stmt = null;
try {
// Step 1: Allocate a database "Connection" object
conn = DriverManager.getConnection(
"jdbc:mysql://localhost:9999/ebookshop", "root", "1234"); // MySQL
// Step 2: Allocate a "Statement" object in the Connection
stmt = conn.createStatement();
// Step 3: Execute a SQL SELECT query, the query result
// is returned in a "ResultSet" object.
String strSelect = "select title, price, qty from books";
System.out.println("The SQL query is: " + strSelect); // Echo For debugging
System.out.println();
ResultSet rset = stmt.executeQuery(strSelect);
// Step 4: Process the ResultSet by scrolling the cursor forward via next().
// For each row, retrieve the contents of the cells with getXxx(columnName).
System.out.println("The records selected are:");
int rowCount = 0;
while(rset.next()) { // Move the cursor to the next row
String title = rset.getString("title");
double price = rset.getDouble("price");
int qty = rset.getInt("qty");
System.out.println(title + ", " + price + ", " + qty);
++rowCount;
}
System.out.println("Total number of records = " + rowCount);
} catch(SQLException ex) {
ex.printStackTrace();
} finally {
// Step 5: Always free resources
try {
if (stmt != null) stmt.close(); // This closes ResultSet too
if (conn != null) conn.close();
} catch(SQLException ex) {
ex.printStackTrace();
}
}
}
}
这是我的raj.sql查询...
create database if not exists ebookshop;
use ebookshop;
drop table if exists books;
create table books (
id int,
title varchar(50),
author varchar(50),
price float,
qty int,
primary key (id));
insert into books values (1001, 'Java for dummies', 'Tan Ah Teck', 11.11, 11);
insert into books values (1002, 'More Java for dummies', 'Tan Ah Teck', 22.22, 22);
insert into books values (1003, 'More Java for more dummies', 'Mohammad Ali', 33.33, 33);
insert into books values (1004, 'A Cup of Java', 'Kumar', 44.44, 44);
insert into books values (1005, 'A Teaspoon of Java', 'Kevin Jones', 55.55, 55);
select * from books;
我已成功下载Mysql连接器，请参阅我的pic
编辑：
使用Class.forName("com.mysql.jdbc.Driver");后现在显示新错误：
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:259)
at JdbcSelectTest.main(JdbcSelectTest.java:9)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Process finished with exit code 0
答案 0 :(得分：0)
下载Mysql jdbc驱动程序jar文件并将其添加到类路径
答案 1 :(得分：0)
好像你忘记了
//step 0 : register driver to driver manager
Class.forName("com.mysql.jdbc.Driver");