如何在Java Servlet中的插入查询中将字符串类型转换为二进制类型

Question

Here i am inserting data into sql server table in one column data type is binary type data it stores i am taking

When i trying to pass data it shows error message and how to insert this

String ins="insert into Users(ID,Name,Password)     values(?,?,?)";

ps.setString(1,id); 
ps.setString(2,Name); 
ps.setString(3,password);  

Answer 1

You need to convert your password String object to byte[] and use preparedStatement.setBytes method as shown below:

byte[] passwordBytes = password.getBytes();
ps.setBytes(9,passwordBytes);  

I am getting this error now:: com.microsoft.sqlserver.jdbc.SQLServerException: Conversion failed when converting the nvarchar value 'SuperUser' to data type int

The problem with your code is that you are using preparedStatement.setString for all datatypes. You need to use preparedStatement.setInt or other suitable methods (look here for API) according to the database table's column design.

Also, I strongly recommend to close the preparestatement object in the finally block or use try with resources , otherwise you will run out of resources.