passing value dynamically to the JASPER API to generate a Report

I am generating the Report using the Jasper Reports . Inside the JRXML file in queryString , the query that is formed is

 SELECT * FROM Address WHERE city = $P{customerId}

Now inside my servlet please tell me how can i pass this value dy开发者_运维知识库namically ??

int custid  = Integer.parseInt(request.getParameter("customerId")) ;

Map parameters = new HashMap();

parameters.put("customerId", custid);

Please tell me is this the correct way of passing the data ??

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You can implement your own datasource (must be net.sf.jasperreports.engine.JRDataSource interface implementation).

After filling (preparing) datasource it should be passed to the JasperFillManager.fillReport(java.lang.String sourceFileName, java.util.Map parameters, JRDataSource jrDataSource) method.

The sample:

    JRMapArrayDataSource dataSource = new JRMapArrayDataSource(data);
    JasperPrint jasperPrint = JasperFillManager.fillReport(sourceFileName, paramsMap, dataSource);