Upload File data into database using spring mvc and hibernate - spring

Question

I need to upload data into 2 database tables(factory and factoryType) using the below form but it isnt working can somebody take a look :
Factory table:factoryId,factoryname
FactoryType table: factoryType,factoryTypeId
FactoryConf table: factoryID,factoryTypeId
We are using hibernate for the database operations.
Model:
#Entity
#Table(name = "FactoryConf", uniqueConstraints = {
#UniqueConstraint(columnNames = { "factoryId" } )
})
public class FactoryConf {
#Id
long factoryId;
#OneToOne
#JoinColumn(name = "factoryId", insertable = false, updatable = false)
Factory factory;
#ManyToOne(optional = false)
#JoinColumn(name = "factoryTypeId")
FactoryType factoryType;
public FactoryConf() {
super();
}
public FactoryConf(long factoryId, FactoryType factoryType) {
super();
this.factoryType = factoryType;
this.factoryId = factoryId;
}
public Factory getFactory() {
return factory;
}
public void setFactory(Factory factory) {
this.factory = factory;
}
public FactoryType getFactoryType() {
return factoryType;
}
public void setFactoryType(FactoryType factoryType) {
this.factoryType = factoryType;
}
public long getFactoryId() {
return factoryId;
}
public void setFactoryId(long factoryId) {
this.factoryId = factoryId;
}
public FactoryType getFactoryTypeByFactoryID(long factoryId){
return factoryType;
}
}
Bean class:
/**
* This bean is defined to parse each record from the CSV file.
* All records are mapped to instances of this bean class.
*
*/
public class FactoryCSVFileInputBean {
private String upload_id;
private String file_name;
private byte file_data;
private long Id;
private String Name;
private String Type;
//getter setters
}
CSV parsing:
/**
* This class is defined for following actions
* 1. Validate the input CSV file format, header columns.
* 2. Parse the CSV file into a list of beans.
* 3. Validate input records with missing data and prepare a valid factory list to be processed. *
*/
public class FactoryCSVUtil {
private static Log log = LogFactory.getLog(FactoryCSVUtil.class);
private static final List<String> fileHeaderFields = new ArrayList<String>();
private static final String UTF8CHARSET = "UTF-8";
static{
for (Field f : FactoryCSVFileInputBean.class.getDeclaredFields()) {
fileHeaderFields.add(f.getName());
}
}
public static List<FactoryCSVFileInputBean> getCSVInputList(InputStream inputStream){
CSVReader reader = null;
List<FactoryCSVFileInputBean> csvList = null;
FactoryCSVFileInputBean inputRecord = null;
String[] header = null;
String[] row = null;
try {
reader = new CSVReader(new InputStreamReader(inputStream,UTF8CHARSET));
csvList = new ArrayList<FactoryCSVFileInputBean>();
header = reader.readNext();
boolean isEmptyLine = true;
while ((row = reader.readNext()) != null) {
isEmptyLine = true;
if(!(row.length==1 && StringUtils.isBlank(row[0]))){//not an empty line, not even containing ','
inputRecord = new FactoryCSVFileInputBean();
isEmptyLine = populateFields(inputRecord, header, row);
if(row.length != header.length)
//inputRecord.setUploadStatus("Not Loaded - Missing or invalid Data");
if(!isEmptyLine)
csvList.add(inputRecord);
}
}
} catch (IOException e) {
log.debug("IOException while accessing FactoryCSVFileInputBean: " + e);
return null;
} catch (IllegalAccessException e) {
log.debug("IllegalAccessException while accessing FactoryCSVFileInputBean: " + e);
return null;
} catch (InvocationTargetException e) {
log.debug("InvocationTargetException while copying FactoryCSVFileInputBean properties: " + e);
return null;
} catch (Exception e) {
log.debug("Exception while parsing CSV file: " + e);
return null;
}finally{
try{
if(reader!=null)
reader.close();
}catch(IOException ioe){}
}
return csvList;
}
protected static boolean populateFields(FactoryCSVFileInputBean inputRecord,String[] header, String[] row) throws IllegalAccessException, InvocationTargetException {
boolean isEmptyLine = true;
for (int i = 0; i < row.length; i++) {
String val = row[i];
if(!StringUtils.isBlank(val)){
BeanUtilsBean.getInstance().copyProperty(inputRecord, header[i], val);
isEmptyLine = false;
} else {
//inputRecord.setUploadStatus(String.format("Not Loaded - Missing or invalid Data for:%s",header[i]));
}
}
return isEmptyLine;
}
public static void validateInputFile(CommonsMultipartFile csvFile, Model model){
InputStream inputStream = null;
CSVReader reader = null;
String fileName = csvFile.getOriginalFilename();
String fileExtension = fileName.substring(fileName.lastIndexOf('.') + 1);
if(fileExtension.toUpperCase().equals("CSV")){
try{
inputStream = csvFile.getInputStream();
reader = new CSVReader(new InputStreamReader(inputStream,UTF8CHARSET));
String[] header = reader.readNext();
if(header!=null){
for (int i = 0; i < header.length; i++) {
if(!header[i].equals("") && !fileHeaderFields.contains(header[i])){
log.debug("Invalid Column found in upload file: " + header[i]);
model.addAttribute("failureMsg", "Invalid Column found in upload file: " + header[i]);
break;
}
}
for(csvHeaderFieldsEnum field : csvHeaderFieldsEnum.values()){
if(!Arrays.asList(header).contains(field.getValue())){
log.debug("Missing column in upload file: " + field.getValue());
model.addAttribute("failureMsg", "Missing column in upload file: " + field.getValue());
break;
}
}
}else{
model.addAttribute("failureMsg", "File is Empty - Please select a valid file");
}
String[] data = reader.readNext();
if(data==null){
log.debug("Empty file with header - No data found");
model.addAttribute("failureMsg", "Empty file with header - No data found");
}
}catch(IOException e){
log.debug("IOException in reading the CSV file: " + e);
model.addAttribute("failureMsg", "Exception in reading the CSV file");
}finally{
if(reader!=null)
try{
reader.close();
}catch(IOException e){ log.debug("IOException in closing reader of CSV file: " + e);}
}
}
else{
model.addAttribute("failureMsg", "Invalid file format - Please select a CSV file");
}
}
}
Model
public class FactoryUploadForm {
private CommonsMultipartFile fileData;
private String uploadComment;
/**
* #return the fileData
*/
public CommonsMultipartFile getFileData() {
return fileData;
}
/**
* #param fileData the fileData to set
*/
public void setFileData(CommonsMultipartFile fileData) {
this.fileData = fileData;
}
/**
* #return the uploadComment
*/
public String getUploadComment() {
return uploadComment;
}
/**
* #param uploadComment the uploadComment to set
*/
public void setUploadComment(String uploadComment) {
this.uploadComment = uploadComment;
}
public String toString(){
return " CSVFileName: " + getFileData().getOriginalFilename() + "; Upload Comment: " + uploadComment;
}
}
Controller
#Controller
public class FactoryUploadDownloadController {
private static final Log logger = LogFactory.getLog(FactoryUploadDownloadController.class);
#Resource
Service Service;
#Resource
FactoryUploadRepository repository;
#RequestMapping(value = "/submitUploadFactoryForm")
public String uploadFactory(FactoryUploadForm uploadform,
HttpServletRequest request, Model model, BindingResult result) {
logger.debug("====================================================================");
List<FactoryCSVFileInputBean> csvList = null;
List<FactoryType> factoryTypes = Service.getFactoryTypes();
try {
CommonsMultipartFile file = uploadform.getFileData();
// parse csv file to list
csvList = FactoryCSVUtil.getCSVInputList(file.getInputStream());
if (csvList == null) {
model.addAttribute("failureMsg","Error in file parsing - Please verify the file");
logger.debug("---------------------------------------------------------");
return "sucess";
}
} catch (Exception e) {
logger.debug("sorry this isn't working for you");
}
try {
CommonsMultipartFile file = uploadform.getFileData();
for (FactoryCSVFileInputBean inputRecord : csvList) {
Factory factoryentity = new Factory();
factoryentity.setId(inputRecord.getId());
factoryentity.setName(inputRecord.getName());
factoryentity = this.Service.saveFactory(factoryentity);
FactoryConf factoryconf = new FactoryConf();
factoryconf.setFactory(factoryentity);
factoryconf.setFactoryType(pickFactoryType(factoryTypes,inputRecord.getType()));
model.addAttribute("factoryconf", factoryconf);
this.Service.savefactoryCfg(factoryconf);
}
} catch (Exception e) {
logger.debug("sorry this isnt working for you");
}
return "success";
}
private FactoryType pickFactoryType(List<FactoryType> types, String typeName) {
for (FactoryType type : types) {
if (type.getFactoryType().equalsIgnoreCase(typeName))
return type;
}
throw new RuntimeException(String.format("Factory Type Invalid :%s", typeName));
}
}

Answer 1

From your question, I understand that you are not able to parse data from a CSV file. Here is sample code for similar task. I think it should help.