Jasper打印示例

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletContext;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;

import com.htf.ap.security.operatelog.annotation.OperateLog;
import com.htf.common.businessconfig.invoice.InvoicePrintModel;
import com.htf.framework.webutil.xwork.annotation.Action;
import com.opensymphony.webwork.ServletActionContext;

import net.sf.jasperreports.engine.JRDataSource;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRExporterParameter;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
import net.sf.jasperreports.engine.export.JRPdfExporter;
import net.sf.jasperreports.engine.util.JRLoader;

public class JasperPrintUtil {

/**
* 生成JasperPrint
*
* @param list 数据源
* @param pathMap报表
* @return JasperPrint list
*/
public static <T> List<JasperPrint> createJasperPrint(List<T> list,
Map<String, String> pathMap, String path, Map<String, Object> paramMap) {
List<JasperPrint> printList = new ArrayList<JasperPrint>();
if (list != null && pathMap != null) {
List<T> dataList = new ArrayList<T>();
try {
for (String kn : pathMap.keySet()) {
dataList.addAll(list);
ServletContext context = ServletActionContext.getRequest().getSession()
.getServletContext();
String file = context.getRealPath(pathMap.get(kn));
JasperReport report = (JasperReport) JRLoader.loadObject(file);
JRDataSource source = new JRBeanCollectionDataSource(dataList);
Map<String, Object> imgMap = paramMap;
JasperPrint print = JasperFillManager.fillReport(report, imgMap, source);
if (print != null) printList.add(print);
//imgMap.clear();
dataList.clear();
}
} catch (JRException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
return printList;
}

/**
* 打印JasperPrint 修改：打印有返回值，以方便调用时判断传递不同的打印参数
*
* @param JasperPrint list
* @return
*/
public static int print(List<JasperPrint> list) {
int flag = -1;// 默认打印失败，1打印成功
ServletOutputStream out = null;
try {
if (list == null) {
return flag;
}
HttpServletResponse response = ServletActionContext.getResponse();
out = response.getOutputStream();
response.setContentType("application/pdf");
JRPdfExporter exporter = new JRPdfExporter();
exporter.setParameter(JRExporterParameter.JASPER_PRINT_LIST, list);
exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, out);
exporter.exportReport();
out.flush();
flag = 1;
return flag;
} catch (JRException e) {
e.printStackTrace();
return flag;
} catch (IOException e) {
e.printStackTrace();
return flag;
} /*finally {刘燕明注释：方便上层调用此方法时可以重新判断打印
IOUtil.close(out);
}*/
}

}

/**
* 打印贷款申请审批表
* 
* @date 2017-3-18
*/
@SuppressWarnings("unchecked")
@OperateLog(moduleName="打印贷款申请审批表", content = "打印贷款申请审批表")
@Action(name="LoanApplyAction_goLoanApplyAppPrint")
public String goLoanApplyAppPrint() {
Long tempId = model.getTempId();
Long stateId = model.getStateId();
//stateId = 4310441L;
// InvoicePrintModel invoicePrintModel = loanApplyBPO.findLoanApplyAppPrintContext(tempId, stateId);
InvoicePrintModel invoicePrintModel = new InvoicePrintModel();
List<String> list = new ArrayList<String>();
list.add("aa");
invoicePrintModel.setDataList(list);
//定义Map集
Map<String, String> pathMap = new HashMap<String, String>();
pathMap.put("a1", "/gjj-pl/pages/g3/gjj/pl/jasper/LoanApplyAppReport1.jasper");
pathMap.put("a2", "/gjj-pl/pages/g3/gjj/pl/jasper/LoanApprove.jasper");
//调用打印方法
JasperPrintUtil.print(JasperPrintUtil.createJasperPrint(
invoicePrintModel.getDataList(), pathMap, null,
invoicePrintModel.getContext()));
//this.print(this.createJasperPrint(invoicePrintModel.getDataList(), pathMap, null,invoicePrintModel.getContext()));
return NONE;
}

流程 创建jasper  然后调用export方法打印jasper对象。