struts2中的jasperreports

Question

我试图通过向它传递整数参数来使用Struts2来运行jasper。但我收到错误

cannot assign instance of net.sf.jasperreports.engine.base.JRBaseTextField to field
net.sf.jasperreports.engine.base.JRBaseParagraph.paragraphContainer of type
net.sf.jasperreports.engine.JRParagraphContainer in instance of 
net.sf.jasperreports.engine.base.JRBaseParagraph

我使用的代码

parameterMap.put(parametername, param);
connection = dbc.getConnection(); 
JasperPrint jasperPrint = JasperFillManager.fillReport("jasper.jasper", parameterMap, connection);
JasperExportManager.exportReportToPdfFile(jasperPrint,"jasper.pdf");  

请任何人帮我解决这个问题

Answer 1

这是已知问题，因为see。

您可能正在使用 commons-digester 2.1 。您应该使用 1.7 版本的 commons-digester 库。

更新：

我的工作示例（独立的maven java应用程序）：

public static void testReport() {
    Connection connection = null;
    try {
        Class.forName("org.hsqldb.jdbcDriver");


        String url = "jdbc:hsqldb:file:d:\\path_to_db\db_file_name";
        connection = DriverManager.getConnection(url, "sa", "");

        String reportSource = "d:\\path_to_jrxml\\simple.jrxml";
        Map<String, Object> params = new HashMap<String, Object>();
        JasperReport jasperReport = JasperCompileManager.compileReport(reportSource);
        JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params, connection);

        JasperExportManager.exportReportToPdfFile(jasperPrint, "d:\\output_path\\out.pdf");
    } catch (Exception e) {
        e.printStackTrace();
        System.out.println(e.getMessage());
    } finally {
        try {
            if (connection != null) {
                connection.close();
            }
        } catch (SQLException ex) {
            System.out.println(ex.getMessage());
        }
    }
}

pom.xml的片段：

<dependencies>
    <dependency>
        <groupId>net.sf.jasperreports</groupId>
        <artifactId>jasperreports</artifactId>
        <version>4.1.2</version>
        <exclusions>
            <exclusion>
                <groupId>tomcat</groupId>
                <artifactId>jasper-compiler-jdt</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>groovy</groupId>
        <artifactId>groovy-all-1.0-jsr</artifactId>
        <version>05</version>
        <scope>runtime</scope>
        <exclusions>
            <exclusion>
                <groupId>xerces</groupId>
                <artifactId>xercesImpl</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>org.hsqldb</groupId>
        <artifactId>hsqldb</artifactId>
        <version>2.2.4</version>
        <scope>runtime</scope>
    </dependency>
</dependencies>

您可以尝试使用像我这样的示例应用程序来构建报表。
我认为您的问题与classpath有关。