--------------------Configuration: test - JDK version 1.4 <Default> - <Default>--------------------
D:\JBuilder9\thirdparty\jakarta-tomcat-4.1.24-LE-jdk14\webapps\test\WEB-INF\Dbcon.java:9: unreported exception java.lang.ClassNotFoundException; must be caught or declared to be thrown
Class.forName("com.mysql.jdbc.Driver");
^
D:\JBuilder9\thirdparty\jakarta-tomcat-4.1.24-LE-jdk14\webapps\test\WEB-INF\Dbcon.java:10: unreported exception java.sql.SQLException; must be caught or declared to be thrown
con=DriverManager.getConnection("jdbc:mysql:///books","root","123");
^
D:\JBuilder9\thirdparty\jakarta-tomcat-4.1.24-LE-jdk14\webapps\test\WEB-INF\Dbcon.java:11: unreported exception java.sql.SQLException; must be caught or declared to be thrown
stmt=con.createStatement();
^
D:\JBuilder9\thirdparty\jakarta-tomcat-4.1.24-LE-jdk14\webapps\test\WEB-INF\Dbcon.java:12: unreported exception java.sql.SQLException; must be caught or declared to be thrown
rs=stmt.executeQuery(sqlstring);
^
4 errorsProcess completed.
D:\JBuilder9\thirdparty\jakarta-tomcat-4.1.24-LE-jdk14\webapps\test\WEB-INF\Dbcon.java:9: unreported exception java.lang.ClassNotFoundException; must be caught or declared to be thrown
Class.forName("com.mysql.jdbc.Driver");
^
D:\JBuilder9\thirdparty\jakarta-tomcat-4.1.24-LE-jdk14\webapps\test\WEB-INF\Dbcon.java:10: unreported exception java.sql.SQLException; must be caught or declared to be thrown
con=DriverManager.getConnection("jdbc:mysql:///books","root","123");
^
D:\JBuilder9\thirdparty\jakarta-tomcat-4.1.24-LE-jdk14\webapps\test\WEB-INF\Dbcon.java:11: unreported exception java.sql.SQLException; must be caught or declared to be thrown
stmt=con.createStatement();
^
D:\JBuilder9\thirdparty\jakarta-tomcat-4.1.24-LE-jdk14\webapps\test\WEB-INF\Dbcon.java:12: unreported exception java.sql.SQLException; must be caught or declared to be thrown
rs=stmt.executeQuery(sqlstring);
^
4 errorsProcess completed.
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我真是糊涂了。
你的jsp没有找到你的驱动程序
你在jbuilder里的话先要将你
的驱动加到jbuilder的类路径
里!
错误报告说java.lang包里找不到Class这个类,可是在script里能通过Class.forName("com.mysql.jdbc.Driver");这句呢并正确运行jsp文件就说明java.lang包里找到Class这个类了啊!
IDE的类路径里
还有你是在jbuilder编译jsp还是
java类文件?
这句话的意思就是,有例外必须被捕获,
package test;
import java.sql.*;
import java.io.Serializable;
public class DbCon implements Serializable{
private ResultSet rs;
private Connection con;
private Statement stmt;
public ResultSet getResultSet(String sqlstring){
try{
Class.forName("com.mysql.jdbc.Driver");
}catch(ClassNotFoundException e){
...............
}
con=DriverManager.getConnection("jdbc:mysql:///books","root","123");
stmt=con.createStatement();
rs=stmt.executeQuery(sqlstring);
return rs;
}
}
类文件当然需要!
呵呵!