執行xampp-win32-1.5.5-installer.exe，安裝了xampp後，其自帶的mysql是5.0.27版的,安裝一切正常，成功後訪問資料庫也沒問題，在資料庫操作一切也正常。

但我寫了個簡單的java程式訪問資料庫時，卻出現了問題。原程式如下：

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

publicclass DAOTest {

private

privatestaticfinal String USERNAME = "root";

privatestaticfinal String PASSWORD = "root";

privatestaticfinal String DRIVER = "com.mysql.jdbc.Driver";

publicstatic Connection getConnection() {

try

Class.forName(DRIVER);

return DriverManager.getConnection(URL, USERNAME, PASSWORD);

} catch (ClassNotFoundException ce) {

thrownew java.lang.RuntimeException(ce);

} catch (SQLException se) {

thrownew java.lang.RuntimeException(se);

}

}

publicstaticvoid main(String[] args){

Connection conn=getConnection

try{

Statement stmt=conn.createStatement();

ResultSet rs=stmt.executeQuery("select * from user");

while(rs.next())

System.out.println(rs.getString("username"));

}catch(SQLException e){

e.printStackTrace();

}

}

}

執行後問題如下：

Exception in thread "main" java.lang.RuntimeException: java.sql.SQLException: Unknown initial character set index '48' received from server. Initial client character set can be forced via the 'characterEncoding' property.

at com.kemei.database.dao.DAOTest.getConnection(DAOTest.java:25)

at com.kemei.database.dao.DAOTest.main(DAOTest.java:29)

Caused by: java.sql.SQLException: Unknown initial character set index '48' received from server. Initial client character set can be forced via the 'characterEncoding' property.

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:910)

at com.mysql.jdbc.Connection.configureClientCharacterSet(Connection.java:2345)

at com.mysql.jdbc.Connection.initializePropsFromServer(Connection.java:3913)

at com.mysql.jdbc.Connection.createNewIO(Connection.java:2683)

at com.mysql.jdbc.Connection.<init>(Connection.java:1531)

at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266)

at java.sql.DriverManager.getConnection(DriverManager.java:525)

at java.sql.DriverManager.getConnection(DriverManager.java:171)

at com.kemei.database.dao.DAOTest.getConnection(DAOTest.java:21)

... 1 more

從錯誤的提示資訊中發現字符集設定出現問題，於是想到可能是xampp自帶mysql的配置檔案可能出有問題。於是到mysql/bin目錄下，找到my.cnf，開啟該檔案，把

collation-server = latin1_general_ci改為collation-server = latin1_swedish_ci，重啟資料庫，再執行該程式，問題解決。