1.请问我这个程序的错误到底在哪呢
文件名为amtlab.java程序:
package com.amtlab;
import java.io.PrintStream;
import java.sql.*;
public class amtlab
{
public static void main(String[] args)
{
public amtlab() /*编译器提示为illegal start of expression public amtlab() */
{ ^
String sDBDriver;
String ConnStr;
Connection con;
ResultSet rs;
sDBDriver = "com.microsoft.jdbc.sqlserver.SQLServerDriver";
sConnStr ="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=amtlab";
con = null;
rs = null;
try {
Class.forName(sDBDriver);
}
catch (ClassNotFoundException classnotfoundexception)
{
System.err.println(classnotfoundexception.getMessage());
} } public ResultSet executeQuery(String s) {
try {
con = DriverManager.getConnection(sConnStr, "sa", "***********");
Statement statement = con.createStatement(1003, 1007);
rs = statement.executeQuery(s);
}
catch (SQLException sqlexception) {
System.err.println(sqlexception.getMessage());
}
return rs;
} public int executeUpdate(String s) {
int i = 0;
try {
con = DriverManager.getConnection(sConnStr, "sa", "**********");
Statement statement = con.createStatement();
i = statement.executeUpdate(s);
}
catch (SQLException sqlexception) {
System.err.println(sqlexception.getMessage());
}
return i;
}/*编译器提示为 ';'excepted */
}
}
amtlab.java所在的完整路径为D:\amtlab\WEB-INF\classes\com\amtlab
我在编译之前设置了包的路径为classpath:D:\amtlab\WEB-INF\classes;
编译时写的语句为D:\>javac amtlab\WEB-INF\classes\com\amtlab.amtlab.java
2.我想引用自己定义的包,为什么编译时说找不到包,该怎么给自己定义的包设置路径,让编译器能找到?(请尽量举一个实际的例子好吗?)
希望高手帮帮小弟!!如果谁能帮我解决,分不够尽量提,谢谢各位了!!
文件名为amtlab.java程序:
package com.amtlab;
import java.io.PrintStream;
import java.sql.*;
public class amtlab
{
public static void main(String[] args)
{
public amtlab() /*编译器提示为illegal start of expression public amtlab() */
{ ^
String sDBDriver;
String ConnStr;
Connection con;
ResultSet rs;
sDBDriver = "com.microsoft.jdbc.sqlserver.SQLServerDriver";
sConnStr ="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=amtlab";
con = null;
rs = null;
try {
Class.forName(sDBDriver);
}
catch (ClassNotFoundException classnotfoundexception)
{
System.err.println(classnotfoundexception.getMessage());
} } public ResultSet executeQuery(String s) {
try {
con = DriverManager.getConnection(sConnStr, "sa", "***********");
Statement statement = con.createStatement(1003, 1007);
rs = statement.executeQuery(s);
}
catch (SQLException sqlexception) {
System.err.println(sqlexception.getMessage());
}
return rs;
} public int executeUpdate(String s) {
int i = 0;
try {
con = DriverManager.getConnection(sConnStr, "sa", "**********");
Statement statement = con.createStatement();
i = statement.executeUpdate(s);
}
catch (SQLException sqlexception) {
System.err.println(sqlexception.getMessage());
}
return i;
}/*编译器提示为 ';'excepted */
}
}
amtlab.java所在的完整路径为D:\amtlab\WEB-INF\classes\com\amtlab
我在编译之前设置了包的路径为classpath:D:\amtlab\WEB-INF\classes;
编译时写的语句为D:\>javac amtlab\WEB-INF\classes\com\amtlab.amtlab.java
2.我想引用自己定义的包,为什么编译时说找不到包,该怎么给自己定义的包设置路径,让编译器能找到?(请尽量举一个实际的例子好吗?)
希望高手帮帮小弟!!如果谁能帮我解决,分不够尽量提,谢谢各位了!!
你试试到当前目录下去编译,文件名不要搞错了。
import java.sql.*;
class amtlab
{
String sDBDriver;
String sConnStr;
Connection con;
ResultSet rs;
public static void main(String[] args)
{
new amtlab();
}
public amtlab() /*编译器提示为illegal start of expression public amtlab() */
{ ^
sDBDriver = "com.microsoft.jdbc.sqlserver.SQLServerDriver";
sConnStr ="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=amtlab";
con = null;
rs = null;
try {
Class.forName(sDBDriver);
}
catch (ClassNotFoundException classnotfoundexception)
{
System.err.println(classnotfoundexception.getMessage());
}
}
public ResultSet executeQuery(String s) {
try {
con = DriverManager.getConnection(sConnStr, "sa", "***********");
Statement statement = con.createStatement(1003, 1007);
rs = statement.executeQuery(s);
}
catch (SQLException sqlexception) {
System.err.println(sqlexception.getMessage());
}
return rs;
}
public int executeUpdate(String s) {
int i = 0;
try {
con = DriverManager.getConnection(sConnStr, "sa", "**********");
Statement statement = con.createStatement();
i = statement.executeUpdate(s);
}
catch (SQLException sqlexception) {
System.err.println(sqlexception.getMessage());
}
return i;
}/*编译器提示为 ';'excepted */
}
改成这样试试