程序每次到stmt.executeUpdate()是就回出错，下面是一小段代码：
Class.forName("com.mysql.jdbc.Driver");
Connection connection = DriverManager.getConnection(url);
connection.setAutoCommit(false);
String sql ="insert into article values(null,0,?,?,?,now(),0)";
PreparedStatement stmt2 = connection.prepareStatement(sql,Statement.RETURN_GENERATED_KEYS);
Statement stmt = connection.createStatement();
stmt2.setInt(1,-1);
stmt2.setString(2,title);
cont=cont.replaceAll("\n"," <br>");
stmt2.setString(3,cont);
stmt2.executeUpdate();
ResultSet rsKey = stmt2.getGeneratedKeys();
rsKey.next();
int key = rsKey.getInt(1);
rsKey.close();
stmt.executeUpdate("update article set id ="+ key + "where id=" + key);//在这老是出错。。
connection.commit();
connection.setAutoCommit(true);
stmt2.close();
stmt.close();
connection.close();
请大家帮忙谢谢。
Class.forName("com.mysql.jdbc.Driver");
Connection connection = DriverManager.getConnection(url);
connection.setAutoCommit(false);
String sql ="insert into article values(null,0,?,?,?,now(),0)";
PreparedStatement stmt2 = connection.prepareStatement(sql,Statement.RETURN_GENERATED_KEYS);
Statement stmt = connection.createStatement();
stmt2.setInt(1,-1);
stmt2.setString(2,title);
cont=cont.replaceAll("\n"," <br>");
stmt2.setString(3,cont);
stmt2.executeUpdate();
ResultSet rsKey = stmt2.getGeneratedKeys();
rsKey.next();
int key = rsKey.getInt(1);
rsKey.close();
stmt.executeUpdate("update article set id ="+ key + "where id=" + key);//在这老是出错。。
connection.commit();
connection.setAutoCommit(true);
stmt2.close();
stmt.close();
connection.close();
请大家帮忙谢谢。
错误信息是这样的：
HTTP Status 500 - -------------------------------------------------------------------------------- type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception org.apache.jasper.JasperException: An exception occurred processing JSP page /ShowAticleTree.jsp at line 82 79: rsKey.next();
80: int key = rsKey.getInt(1);
81: rsKey.close();
82: stmt.executeUpdate("update article set id ="+ key + "where id=" + key);
83: connection.commit();
84: connection.setAutoCommit(true);
85: stmt2.close();
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:524)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:417)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause javax.servlet.ServletException: java.sql.SQLException: 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 'id=221' at line 1
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:850)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:779)
org.apache.jsp.ShowAticleTree_jsp._jspService(ShowAticleTree_jsp.java:220)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause java.sql.SQLException: 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 'id=221' at line 1
com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2975)
com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1600)
com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1695)
com.mysql.jdbc.Connection.execSQL(Connection.java:2998)
com.mysql.jdbc.Statement.executeUpdate(Statement.java:1071)
com.mysql.jdbc.Statement.executeUpdate(Statement.java:1005)
org.apache.jsp.ShowAticleTree_jsp._jspService(ShowAticleTree_jsp.java:137)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.14 logs.
-------------------------------------------------------------------------------- Apache Tomcat/6.0.14
貌似少了个空格stmt.executeUpdate("update article set id ="+ key + " where id=" + key);