CRUD是最常见的数据库操作，即增删改查 
C 增加(Create) 
R 读取查询(Retrieve) 
U 更新(Update) 
D 删除(Delete) 

在JDBC中增加，删除，修改的操作都很类似，只是传递不同的SQL语句就行了。 
查询因为要返回数据，所以和上面的不一样，将在查询章节讲解。

1  增

package jdbc;
  
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
  
public class TestJDBC {
    public static void main(String[] args) {
  
        try {
            Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
  
        try (
            Connection c = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/xxxxx?characterEncoding=UTF-8",
                "xxx", "xxx");
            Statement s = c.createStatement();             
        )
        {
            String sql = "insert into hero values(null," + "'提莫'" + "," + 373.0f + "," + 160 + ")";
            s.execute(sql);
              
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

2  删

​
package jdbc;
  
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
  
public class TestJDBC {
    public static void main(String[] args) {
  
        try {
            Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
  
        try (
            Connection c = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/xxxxx?characterEncoding=UTF-8",
                "xxx", "xxx");
            Statement s = c.createStatement();             
        )
        {
           String sql = "delete from hero where id = 5";
            s.execute(sql);
              
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

​

3 改

​
​
package jdbc;
  
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
  
public class TestJDBC {
    public static void main(String[] args) {
  
        try {
            Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
  
        try (
            Connection c = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/xxxxx?characterEncoding=UTF-8",
                "xxx", "xxx");
            Statement s = c.createStatement();             
        )
        {
          String sql = "update hero set name = 'name 5' where id = 3";
            s.execute(sql);
              
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

​

​