我试图将数据导出为PDF，但是当我尝试将其导出时，pdf不会像“未找到数据”那样显示
此代码在bean上
public JasperPrint exportTo() {
if(this.listReportMaster == null || this.listReportMaster.isEmpty()){
FacesMessage messageFailed = new FacesMessage(FacesMessage.SEVERITY_INFO,"Info","No data found");
RequestContext.getCurrentInstance().showMessageInDialog(messageFailed);
return null;
}
String path = FacesContext.getCurrentInstance().getExternalContext().getRealPath("/resources/report/PRPKReportPDF.jasper");
JRBeanCollectionDataSource beanCollectionDataSource = new JRBeanCollectionDataSource(this.listReportMaster);
try {
JasperPrint jasperPrint = JasperFillManager.fillReport(path, null, beanCollectionDataSource);
return jasperPrint;
} catch (JRException e) {
e.printStackTrace();
return null;
}
}
public void exportToPdf(ActionEvent actionEvent){
if(this.lazyMasterReportDataModel != null){
System.out.println("masuk exporttopdf");
String sql = ((LazyMasterReportDataModel) this.lazyMasterReportDataModel).getSqlReportPrint();
List<Object> listObject = ((LazyMasterReportDataModel) this.lazyMasterReportDataModel).getObjectSqlListReportPrint();
this.listReportMaster = reportMasterPRPKController.getPRPKForReport(sql, listObject);
JasperPrint jasperPrint = exportTo();
String fileName = "PRPKNew_Report".concat("_").concat(".pdf");
if(jasperPrint != null) reportMasterPRPKController.exportToPDF(fileName, jasperPrint);
else System.out.println("jasperprint null");
}else{
System.out.println("keluar exporttopdf");
FacesMessage messageFailed = new FacesMessage(FacesMessage.SEVERITY_INFO,"Info","No data found");
RequestContext.getCurrentInstance().showMessageInDialog(messageFailed);
}
}
每当我尝试导出它时，总是显示“未找到数据”，这是程序运行此代码FacesMessage messageFailed = new FacesMessage(FacesMessage.SEVERITY_INFO,"Info","No data found");的结果，并且“ this.lazyMasterReportDataModel”为空，但是当我再次检查时，没有任何问题在代码上，我不知道它是否有错误的代码或缺陷代码
这是惰性代码
List<ReportMasterPRPK> listMasterPRPK = new ArrayList<>();
ReportMasterPRPKQuery reportMasterPRPKQuery = new ReportMasterPRPKQuery();
Page page = new Page();
String order = "GROUP a.prpk_number, a.prpk_type_id, a.created_date, a.pic_prpk_id, a.business_unit_id, a.pic_department_id, a.prpk_desc, a.prpk_request, a.prpk_background, a.prpk_analysis_benefit, a.priority_level_id, a.cost, b.prpk_type_name, c.business_unit, d.department_name, e.priority_name, f.user_name ORDER BY a.created_date ";
String columname = "";
String sql = "";
List<Object> objectSqlList = new ArrayList<>();
String sqlReport = "";
String sqlReportPrint = "";
List<Object> objectSqlListReport = new ArrayList<>();
List<Object> objectSqlListReportPrint = new ArrayList<>();
String flag;
public LazyMasterReportDataModel() {
}
public LazyMasterReportDataModel(String flag) { //ini
this.flag = flag;
}
public LazyMasterReportDataModel(String sqlReport, List<Object> objectSqlListReport) {
this.sqlReport = sqlReport;
this.objectSqlListReport = objectSqlListReport;
}
@Override
public List<ReportMasterPRPK> load(int first, int pageSize, String sortField, SortOrder sortOrder,
Map<String, Object> filters) {
page.setLimit(pageSize);
page.setOffset(first);
if(this.sqlReport != null){
this.sql = this.sqlReport;
this.objectSqlList = this.objectSqlListReport;
}else{
sql = "";
objectSqlList = new ArrayList<>();
//objectSqlList.clear();
}
if(flag != null){ //ini
if(flag.equals("no selected")){
sql = sql+" AND c.is_selected = 'n' ";
}
}
if (filters != null){
for(String key: filters.keySet()){
String filterColumnName = "";
for(Field field : ReportMasterPRPK.class.getDeclaredFields()){
if(field.getName().equals(key)) filterColumnName = field.getAnnotation(Column.class).value();
}
if(filters.get(key) instanceof String){
if("receivedDate".equals(key)){
if(((String)filters.get(key)).trim().length() > 20){
String startDate = "'" + filters.get(key).toString().substring(0, 10) + "'";
String endDate = "'" + filters.get(key).toString().substring(11, 21) + "'";
sql = sql + " AND " + filterColumnName + " BETWEEN " + startDate + " AND " + endDate+ " ";
}
}else{
if(((String) filters.get(key)).trim().length() > 0){
sql = sql+"AND "+filterColumnName+" ILIKE ? ";
String value = "%"+filters.get(key)+"%";
objectSqlList.add(value);
}
}
}else{
if(((String[]) filters.get(key)).length > 0){
sql = sql+" AND "+filterColumnName+" in ";
String value = "(";
for(String string : (String[]) filters.get(key)){
value = value+"'"+string+"',";
}
value = value.substring(0, value.length()-1)+") ";
sql = sql + value;
}
}
}
}
if(sortField != null){
for(Field field : ReportMasterPRPK.class.getDeclaredFields()){
if(field.getName().equals(sortField)) columname = field.getAnnotation(Column.class).value();
}
if(sortOrder.toString().equals("ASCENDING")) order = " ASC";
else order = " DESC";
sql = sql+" GROUP a.prpk_number, a.prpk_type_id, a.created_date, a.pic_prpk_id, a.business_unit_id, a.pic_department_id, a.prpk_desc, a.prpk_request, a.prpk_background, a.prpk_analysis_benefit, a.priority_level_id, a.cost, b.prpk_type_name, c.business_unit, d.department_name, e.priority_name, f.user_name ORDER BY "+columname+" "+order;
System.out.println("sql sort: "+sql+" : "+objectSqlList.size());
}else{
sql = sql + order;
}
sqlReportPrint = sql;
objectSqlListReportPrint = objectSqlList;
this.listMasterPRPK = reportMasterPRPKQuery.retrivePage(page, sql, objectSqlList.toArray());
int dataSize = reportMasterPRPKQuery.retrieveMaxRow(sql, objectSqlList.toArray());
this.setRowCount(dataSize);
//objectSqlList.clear();
if(this.sqlReport != null){
this.sql = this.sqlReport;
this.objectSqlList = this.objectSqlListReport;
}else{
sql = "";
objectSqlList.clear();
}
order = "GROUP a.prpk_number, a.prpk_type_id, a.created_date, a.pic_prpk_id, a.business_unit_id, a.pic_department_id, a.prpk_desc, a.prpk_request, a.prpk_background, a.prpk_analysis_benefit, a.priority_level_id, a.cost, b.prpk_type_name, c.business_unit, d.department_name, e.priority_name, f.user_name ORDER BY a.created_date ";
return listMasterPRPK;
}
public List<ReportMasterPRPK> calculateRownum(List<ReportMasterPRPK> listMasterPRPK, int first){
int i = 1;
for (ReportMasterPRPK masterPRPK : listMasterPRPK) {
masterPRPK.setRownum(first + i);
i++;
}
return listMasterPRPK;
}
public String getSqlReportPrint() {
return sqlReportPrint;
}
public void setSqlReportPrint(String sqlReportPrint) {
this.sqlReportPrint = sqlReportPrint;
}
public List<Object> getObjectSqlListReportPrint() {
return objectSqlListReportPrint;
}
public void setObjectSqlListReportPrint(List<Object> objectSqlListReportPrint) {
this.objectSqlListReportPrint = objectSqlListReportPrint;
}
对不起，如果我的英语不好，但是我希望你能理解我的意思...
感谢...