Java learning -JDBC practice

Exercise 1

Circulation means, inserting data into the database 100, and the query results observed in mysql-front

 1 package jdbc;
 2 
 3 import java.sql.Connection;
 4 import java.sql.DriverManager;
 5 import java.sql.SQLException;
 6 import java.sql.Statement;
 7 
 8 public class TestJDBC {
 9     public static void main(String[] args) {
10         // 初始化驱动
11         try {
12             Class.forName("com.mysql.jdbc.Driver");
13         } catch (ClassNotFoundException e) {
14             // the TODO Auto-Generated Block the catch 
15              e.printStackTrace ();
 16          }
 . 17          // use the try-with-resource manner automatically close the connection, because the Connection and Statement interfaces are implemented AutoCloseable 
18 is          the try (
 . 19                  Connection C = the DriverManager. the getConnection ( "JDBC: MySQL: //127.0.0.1:? 3306 / how2java = UTF-characterEncoding. 8" ,
 20 is                  "the root", "ADMIN" ); 
 21 is                  the Statement S = c.createStatement ();) {
 22 is              s.execute ( "TRUNCATE Table Hero" );
 23 is              String name = null ;
 24             float hp = 100.0f;
25             int damage = 100;
26             for (int i = 0; i < 100; i++) {
27                 name = "\'" + "Hero-" + String.valueOf(i + 1) + "\'";    //注意格式，必须单引号'
28                 String sql = "insert into hero values(null," + name + "," + (hp++) + "," + (damage++) + ")";
29                 s.execute(sql);
30             }
31         } catch (SQLException e) {
32             // TODO Auto-generated catch block
33             e.printStackTrace ();
34          }
 35  
36      }
 37 }

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