Java in eclipse gets the query result set for MySQL

No nonsense, first on the code, then explain the explanation

1PackageCom.ningmeng;23Import java.sql.*;4/**5* 1: Get query result set6*@authorBiexiansheng7*8*/9PublicClassTest03 {1011PublicStaticvoidMain (string[] args) {12Try{Class.forName ("Com.mysql.jdbc.Driver");SYSTEM.OUT.PRINTLN ("Load Database driver succeeded");String url= "Jdbc:mysql://localhost:3306/test";//Declaring the URL of the database testString user= "root";//Database accountPass= "123456";//Database Password18//Establish a database connection and get the connection object connConnection conn=Drivermanager.getconnection (Url,user,pass);SYSTEM.OUT.PRINTLN ("Database connection succeeded");Statement stmt=conn.createstatement ();//Create a statement objectString sql= "SELECT * from users";//Generate an SQL statementResultSet rs=stmt.executequery (SQL);//Execute the query and assign the query result to the result set object24int id,age,sex;//Declare 3 variables as Id,age,sexString Username,password;//Declare 2 variables for user name, passwordSystem.out.println ("id\t user name \ t password \ t age \ t gender");//where \ t equals 8 spaces27while (Rs.next ()) {//Traversing result SetsId=rs.getint ("id");//Get IDUsername=rs.getstring (2);//Password=rs.getstring ("password");//Age=rs.getint (4);//Sex=rs.getint (5);//System.out.println (id+ "\ t" +username+ "\ T" +password+ "\ T" +age+ "\ T" +sex+ "\ T");35}SYSTEM.OUT.PRINTLN ("Get query result set");37Conn.close ();SYSTEM.OUT.PRINTLN ("Close Database Connection object");39}Catch(ClassNotFoundException e) {40// TODO auto-generated catch block e.printstacktrace ();      (SQLException e) {$/ / TODO auto-generated catch block45)//LOAD Database driver c14> E.printstacktrace ();               +} 

The results are as follows

The 1:result interface is similar to a temporary table used to temporarily hold the result set obtained by a database query operation.

The Excutequery () method in the 2:preparedstatement interface, in which the PreparedStatement object executes a SQL query statement that returns the result as a result set of query results object

3:next () Moves the pointer down one line

The GetXXX () method of the 4:resultset object gets the data in the query result set. Because the data saved in ResultSet is in the form of a table, you can specify the column ordinal and column name by using the GetXXX () method.

Id=rs.getint ("id");//Get ID

Username=rs.getstring (2);//

Password=rs.getstring ("password");//

Age=rs.getint (4);//

Sex=rs.getint (5);//

You can understand it carefully, GetXXX (parameters), the parameter can be either the name of the column or the number of the first column.

Java in eclipse gets the query result set for MySQL