我是Java和Oracle的新手。我试图制作一个列出产品序列号的应用程序,当您从列表中单击产品的序列号时,它会在文本框中显示数据库中的其他列信息。我有一个名为CRUD的表单,我使用的是Oracle 10g。代码是在这里:Java Oracle数据库连接错误
package project1;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
public class CRUD extends javax.swing.JFrame {
Connection connection = null;
public CRUD() {
try {
initComponents();
String driverName = "oracle.jdbc.driver.OracleDriver";
Class.forName(driverName);
String serverName = "192.168.0.36";
String portNumber = "1521";
String sid = "XE";
String url = "jdbc:oracle:thin:@"+serverName+":"+portNumber+":"+sid;
String userName = "HR";
String password = "hr";
try {
connection = DriverManager.getConnection(url,userName,password);
} catch (SQLException ex) {
Logger.getLogger(CRUD.class.getName()).log(Level.SEVERE, null, ex);
}
try {
String temp="";
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery("SELECT SERI_NO FROM KART");
while(rs.next()) // dönebildiği süre boyunca
{
String s = rs.getString("SERI_NO") ; //kolon isimleri oluşturuldu
temp+=s+"_";
}
Object [] tem_obj;
tem_obj=temp.split("_");
listOgrenciler.setListData(tem_obj);
} catch (SQLException ex) {
Logger.getLogger(edit.class.getName()).log(Level.SEVERE, null, ex);
}
} catch (ClassNotFoundException ex) {
Logger.getLogger(CRUD.class.getName()).log(Level.SEVERE, null, ex);
}
listOgrenciler.addListSelectionListener(new ListSelectionListener() {
@Override
public void valueChanged(ListSelectionEvent arg0) {
if (!arg0.getValueIsAdjusting()) {
try {
Statement stmtx = connection.createStatement();
Object[] sss=listOgrenciler.getSelectedValues();
String swhere="" ;
for (int i = 0; i < sss.length; i++) {
swhere+=sss[i].toString()+",";
}
swhere=swhere.substring(0,swhere.length()-1);
ResultSet rsx = stmtx.executeQuery("SELECT * FROM KART where SERI_NO in ("+swhere+")") ;
String temp="";
Object [] tem_obj;
tem_obj=temp.split("_");
String ara="";
for (int i = 0; i < tem_obj.length; i++) {
ara+=tem_obj[i].toString()+"\n";
}
texttoarea.setText(ara);
} catch (SQLException ex)
{
Logger.getLogger(edit.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
});
}
错误,我得到的是在这里:
20.Şub.2014 11:22:11 project1.CRUD$1 valueChanged
SEVERE: null
java.sql.SQLSyntaxErrorException: ORA-00904: "SNS080961097": invalid identifier
.....
at project1.CRUD$1.valueChanged(CRUD.java:78)
......
正如我以前说过,我是新来的Java和甲骨文。如果错误是如此明显,不要笑:)
您应该打印出生成的语句,然后向我们显示* that *。并请包括表格定义。但是我想你是用双引号将'IN'子句中的字符文字括起来。在SQL中,使用双引号(''')来引用标识符。字符文字需要用单引号引起来,所以这个值应该是''SNS080961097'** **不**'“SNS080961097”' –
调试以查看什么您的变量'swhere'正在携带... – sadhu