[英]Print SQL table with java
I cant print SQL table with JAVA.我不能用 JAVA 打印 SQL 表。 I think JDBC Connection is not a problem.我认为 JDBC Connection 不是问题。 How can I print table in console??如何在控制台中打印表格?
Connection conn = null;
Statement stmt = null;
String url = "jdbc:oracle:thin:@localhost:1521:orcl";
String user = "system";
String pwd = "SSTTaarr00119922";
ResultSet rs = null;
I did drivermanager getconnection.我做了 drivermanager getconnection。
System.out.println("start Connection");
try {
Class.forName("oracle.jdbc.OracleDriver");
conn = DriverManager.getConnection(url, user, pwd);
} catch (ClassNotFoundException e1) {
System.out.println("Error loading driver:" + e1.toString());
return;
} catch (Exception e2) {
System.out.println("Fail DB Connection:" + e2.toString());
return;
}
String sql = "SELECT * FROM dept";
try {
stmt = conn.createStatement();
rs = stmt.executeQuery(sql);
System.out.println(sql);
while (rs.next()) {
String deptno = rs.getString(1);
String dname = rs.getString(2);
String Loc = rs.getString(3);
System.out.println(deptno + dname + Loc);
}
I cant print while func. func 时我无法打印。
In your code, you are missing the catch in try---catch block.在您的代码中,您缺少 try---catch 块中的 catch。 The code below is worked with SQL Server下面的代码适用于 SQL Server
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
System.out.println("start Connection");
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
conn = DriverManager.getConnection("jdbc:sqlserver://localhost;databaseName=xxx;", "yyy", "zzz");
} catch (ClassNotFoundException e1) {
System.out.println("Error loading driver:" + e1.toString());
return;
} catch (Exception e2) {
System.out.println("Fail DB Connection:" + e2.toString());
return;
}
String sql = "SELECT * FROM [dbo].[User]";
try {
stmt = conn.createStatement();
rs = stmt.executeQuery(sql);
System.out.println(sql);
while (rs.next()) {
String deptno = rs.getString(1);
String dname = rs.getString(2);
String Loc = rs.getString(3);
System.out.println(deptno + dname + Loc);
}
} catch (Exception e2) {
System.out.println("Fail DB Connection:" + e2.toString());
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.