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JDBC各类详解_statement和JDBC练习_insert语句

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statement:执行sql的对象

    执行java

       boolean execute(String sql) 可执行任意的SQL了解

       int executeUpdate(String sql) : 执行DML (insert update delete)语句DDL(create,alter,drop)语句

       返回值 :影响行数,可以通过这个影响的行数来判断DML语句是否执行成功 返回值 >0的执行成功,反之,则失败

       Result execuitQuery(String sql) : 执行DQL(select)语句

 

 

 

 

 

 

 

 

 

 

JDBC练习_insert语句

  需求:account表:添加一条数据

java

  

Statement statement = null;
        Connection connection = null;
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            String sql = "insert into account values(null,'王五',3000)";
            connection = DriverManager.getConnection("jdbc:mysql:///a2", "root", "root");
            statement = connection.createStatement();
            int i = statement.executeUpdate(sql);
            System.out.println(i);
            if (i>0){
                System.out.println("添加成功");
            }else {
                System.out.println("添加失败");
            }
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        }finally {
            if (statement !=null){
                try {
                    statement.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
            if (connection !=null){
                try {
                    connection.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }

 

 

 

 

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标签:语句,insert,JDBC,String,connection,statement,sql,null
来源: https://www.cnblogs.com/12-12-12/p/16521319.html