老师，我的删除语句一直执行失败（其它的操作正常执行，就是删除一直显示失败）

package com.imooc.jdbc.demo1;
 
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
 
import org.junit.Test;
 
public class JDBCDemo7 {
    @Test
    public void demo() {
         
        Connection conn = null;
        Statement stmt = null;
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/jdbctest","root","1234");
            stmt = conn.createStatement();
            String sql = "DELETE FROM goods WHERE name='耳机' ";
            int i = stmt.executeUpdate(sql);
            if(i>0) {
                System.out.println("执行删除成功！");
            }else {
                System.out.println("执行失败！");
            }
        } catch (Exception e) {
 
            e.printStackTrace();
        }finally {
            if(conn != null) {
                try {
                    conn.close();
                } catch (SQLException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                conn = null;
            }
             
            if(stmt != null) {
                try {
                    conn.close();
                } catch (SQLException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                stmt = null;
            }
             
        }
         
    }
     
}