Omnifaces Escape JSON Strings

Question

有没有办法转义文本以便在Omnifaces的json表达式中使用： e.g：

declare 
sql_stmt varchar2(4000);
rec refcursor;
begin 
IF  p_trantype='AP'THEN                                                     -- Should execute below block
 sql_stmt:=  'SELECT al.tax_rate_code AS taxcode,
         al.amount AS netamount,
         al.amount AS taxamount,
         ai.invoice_date AS reportingdate,
         ai.invoice_num AS invoicenumber,
         ai.invoice_date AS invoicedate,
         ai.invoice_amount AS grossamount,
         ai.invoice_num AS documentnumber,
         ai.invoice_date AS documentdate,
         ai.vendor_id AS suplierid,
         hz.tax_reference AS suppliervatnumber,
         gl.segment1 AS companycode,
         'AP' AS transactiontype
       from...';
 else 
sql_stmt:=...
end if;
open rec for sql_stmt;
fetch rec into ...

这似乎是为了逃避单引号，但我想逃避双引号。

Answer 1

对于EL中的JSON编码，请改用#{of:toJson}（在OmniFaces 1.5中引入）。

"reviewBody": #{of:toJson(reviewBean.text)}

请注意，它已经处理了双引号。此功能不仅可以处理CharSequence（String和朋友），还可以正确处理Number，Boolean，Date，Object[]， Collection，Map甚至是真正的Javabeans。基本上，您可以使用它编码“所有内容”，而无需担心格式和引用。另请参阅showcase，javadoc和source code。