Insert query in jasper reports

Is it possible to execute "insert query" in IReports/jasper reports during report g开发者_如何学JAVAeneration?

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Yes, the idea you need is parameters using this syntax: $P!{PARAM_NAME}.

So your entire SQL query (or other type of query) could be simply $P!{SQL}. Then you pass in exactly the dynamic SQL that you need.

UPDATE: After reading Sharad's comment, I realized that my answer above is not good. What I wrote is true... but it fails to address the core question.

No, your report cannot really execute an insert statement. Strictly speaking, I'm sure it's not impossible. You could add a scriptlet or custom function in a .jar file that makes a connection and does an insert. But realistically speaking... a report will execute one or more queries. The JR framework is not intended to execute inserts or updates.

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Yes you can. You can execute the query when you want to display the report. Here is a sample that works for me.

    try {
        Map parameters = new HashMap();
        connectionString ="jdbc:mysql://localhost/myDb", "myUsername", "myPassword"
        Class.forName("com.mysql.jdbc.Driver");
        Connection conn = DriverManager.getConnection(connectionString);
        PreparedStatement stmt = conn.prepareStatement(query);
        ResultSet rs = stmt.executeQuery();
        JRResultSetDataSource rsdt = new JRResultSetDataSource(rs);

        JasperPrint jp;
        jp = JasperFillManager.fillReport("sourceFileName.jasper", parameters, rsdt);
        JasperViewer jv = new JasperViewer(jp, false);
        jv.setVisible(true);

    } catch (ClassNotFoundException | SQLException | JRException ex) {
        ex.printStackTrace();
    }