我如何在Java中将整数值转换为字符串值

Question

String doc = String.valueOf(po.get_Value("DocumentNo"));

I used above code but still it's taking the integer value in the query. Below I mentioned the query where I want the String value.

String sql = "update C_partial SET IsExported = 'Y' where documentno ="+doc;

Answer 1

Use PreparedStatement

String sql = "update C_partial SET IsExported = 'Y' where documentno =?";

PreparedStatement stmt = connection.prepareStatement(sql);
stmt.setString(1, doc);

It is just safer and cleaner

Answer 2

You can use

String.valueof();

like this and add ' to your query

String sql = "update C_partial SET IsExported = 'Y' where documentno = '"+String.valueOf(doc) +"'";

Answer 3

您需要用撇号换行

String sql = "update C_partial SET IsExported = 'Y' where documentno = '"+doc+"'";