Question

java连接到oracle。下面这段代码编译没有报错但是没有任何输出结果？请问是什么原因

package com.zp;
import java.sql.*;
public class java_oracle_jdbc {

private Connection conn;
private Statement stmt;

public void ConnectionInit() {

try {
Class.forName("oracle.jdbc.driver.OracleDriver");
conn = DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:orcl","scott","shujku");

System.out.println("DB connecting successfully!");
}catch(ClassNotFoundException e) {
System.err.println(e);
}catch(SQLException se) {
System.err.println(se);
}
}
public void Query() {

String sqlStr = "select * from test";
ResultSet rs = null;

String id = null;
String name = null;

ConnectionInit();
try {

rs = stmt.executeQuery(sqlStr);
while(rs.next()) {
id = rs.getString("id");
name = rs.getString("name");
System.out.println(id + " " + name);
}
stmt.close();
conn.close();
}catch(SQLException se) {
System.err.println(se);
}
}

public static void main(String[] args) {

}
}

Answer 1

因为你的主函数是空的

Answer 2

你这都不调用执行Query()咋个显示结果

Answer 3

main是空的，没粘贴吗？话说你叫什么

Answer 4

笑死我了 你一个空的 怎么输出结果啊 你这不是强人所难吗

Answer 5

高手～～～这代码谁教你的