您的 SQL 语法有错误；检查与您的 MySQL 服务器版本相对应的手册以获取正确的语法解决方案：
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【中文标题】您的 SQL 语法有错误；检查与您的 MySQL 服务器版本相对应的手册以获取正确的语法解决方案：【英文标题】：You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax Solution: 【发布时间】：2020-10-25 11:17:41 【问题描述】：数据库管理员：
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.swing.JOptionPane;
public class DBManager
private String connectionString="jdbc:mysql://localhost/freedbtech_technocontrol?autoReconnect=true&useSSL=false";
private Connection conn=null;
private Statement st=null;
private ResultSet rs=null;
private String out;
public DBManager()
private void createConnection()
try
conn=DriverManager.getConnection(connectionString,"root","");
st=conn.createStatement();
catch (SQLException e)
// TODO Auto-generated catch block
e.printStackTrace();
public void addProject(int po,java.sql.Date idate,String POA,String comp,String pd, String pc,java.sql.Date pcd,String r)
createConnection();
String query="Insert into project_details(P0#,IssueDate,POAmount,CompanyName,ProjectDescription,ProjectCompletion,ProjectCompletionDate,Remarks) VALUES ("+po+",'"+idate+"','"+POA+"','"+comp+"','"+pd+"','"+pc+"','"+pcd+"','"+r+"')";
System.out.println(query);
try
st.execute(query);
JOptionPane.showMessageDialog(null, "Added Project :)");
st.close();
conn.close();
catch (SQLException e)
// TODO Auto-generated catch block
e.printStackTrace();
public static void main(String args[])
DBManager test=new DBManager();
项目详情： 这是访问数据库的部分。
AddButton.addActionListener(new ActionListener()
@Override
public void actionPerformed(ActionEvent e)
// TODO Auto-generated method stub
try
db=new DBManager();
pon=po.getText();
pn=Integer.parseInt(pon);
idate=i.getText();
java.util.Date dateUtil = DATE_FORMAT.parse(idate);
java.sql.Date dateSql = new java.sql.Date(dateUtil.getTime());
pa=poa.getText();
comp=compName.getText();
pd=pdes.getText();
pcd=pcdate.getText();
java.util.Date dateUtil2 = DATE_FORMAT.parse(pcd);
java.sql.Date cdate = new java.sql.Date(dateUtil2.getTime());
r=remarks.getText();
db.addProject(pn,dateSql, pa,comp, pd, radioResponse,cdate, r);
catch (ParseException e1)
// TODO Auto-generated catch block
e1.printStackTrace();
);
输出是：
Insert into project_details(P0#,IssueDate,POAmount,CompanyName,ProjectDescription,ProjectCompletion,ProjectCompletionDate,Remarks) VALUES (12312,'1999-09-12','342342sfdsdfsfsd','fsfwe','fsdfsdfs','Yes','1999-09-12','')
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
at mysql.connector.java@5.1.38-bin/com.mysql.jdbc.Util.handleNewInstance(Util.java:404)
at mysql.connector.java@5.1.38-bin/com.mysql.jdbc.Util.getInstance(Util.java:387)
at mysql.connector.java@5.1.38-bin/com.mysql.jdbc.SQLError.createSQLException(SQLError.java:939)
at mysql.connector.java@5.1.38-bin/com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3878)
at mysql.connector.java@5.1.38-bin/com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3814)
at mysql.connector.java@5.1.38-bin/com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2478)
at mysql.connector.java@5.1.38-bin/com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2625)
at mysql.connector.java@5.1.38-bin/com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2547)
at mysql.connector.java@5.1.38-bin/com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2505)
at mysql.connector.java@5.1.38-bin/com.mysql.jdbc.StatementImpl.executeInternal(StatementImpl.java:840)
at mysql.connector.java@5.1.38-bin/com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:740)
at DBManager.addProject(DBManager.java:37)
at ProjectDetails$3.actionPerformed(ProjectDetails.java:231)
at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1967)
at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2308)
at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
at java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
at java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:279)
at java.desktop/java.awt.Component.processMouseEvent(Component.java:6636)
at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3342)
at java.desktop/java.awt.Component.processEvent(Component.java:6401)
at java.desktop/java.awt.Container.processEvent(Container.java:2263)
at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5012)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4844)
at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918)
at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4547)
at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307)
at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2762)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4844)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:772)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:743)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
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【问题讨论】：
【参考方案1】：您的查询以
开头String query="Insert into project_details(P0#,IssueDate
ü0# 是无效的列名并且被禁止。
如果那是你的列名，你必须在它周围使用反引号
String query="Insert into project_details(`P0#`,IssueDate
【讨论】：
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