本文实例讲述了java实现将结果集封装到List中的方法。分享给大家供大家参考,具体如下:
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import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
public class TestResultSet {
public static List query(){
Connection conn = new ConnectionUtil().openConnection();
try {
Statement stmt = conn.createStatement();
String sql = "select id,name,email from customertbl" ;
ResultSet rs = stmt.executeQuery(sql);
//将结果集封装到List中
List list = new ArrayList();
while (rs.next()){
// 可以根据列名称也可以根据列索引
int id = rs.getInt( 1 );
String name = rs.getString( "name" );
String email = rs.getString( "email" );
System.out.println(id+ ":" +name+ ":" +email);
Customer c = new Customer();
c.setId(id);
c.setName(name);
c.setEmail(email);
//将对象存放到list容器中
list.add(c);
}
return list;
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
conn.close();
} catch (SQLException e) {
conn = null ;
e.printStackTrace();
}
}
return null ;
}
}
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希望本文所述对大家java程序设计有所帮助。