嘿，我正试图从其他类中获取静态地图的大小...
我在一个班级中定义静态地图......如
tasklet.class
package com.hcsc.ccsp.nonadj.subrogation.integration;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import org.apache.commons.lang3.StringUtils;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import org.springframework.batch.core.StepContribution;
import org.springframework.batch.core.scope.context.ChunkContext;
import org.springframework.batch.core.step.tasklet.Tasklet;
import org.springframework.batch.repeat.RepeatStatus;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.core.io.Resource;
import org.springframework.util.Assert;
import com.hcsc.ccsp.nonadj.subrogation.batch.Subrogation;
import com.hcsc.ccsp.nonadj.subrogation.common.SubrogationConstants;
/**
* @author Manan Shah
*
*/
public class SubrogationFileTransferTasklet implements Tasklet,
InitializingBean {
private Logger logger = LogManager
.getLogger(SubrogationFileTransferTasklet.class);
private Resource inputfile;
private Resource outputfile;
public static String fileLastName;
public static String header = null;
public static String trailer = null;
public static List<Subrogation> fileDataListSubro = new ArrayList<Subrogation>();
public List<String> fileDataListS = new ArrayList<String>();
public static TreeMap<String, Subrogation> map = new TreeMap<String, Subrogation>();
public int counter = 0;
public String value;
@Override
public void afterPropertiesSet() throws Exception {
Assert.notNull(inputfile, "inputfile must be set");
}
public void setTrailer(String trailer) {
this.trailer = trailer;
}
public void setHeader(String header) {
this.header = header;
}
public String getTrailer() {
return trailer;
}
public String getHeader() {
return header;
}
public Resource getInputfile() {
return inputfile;
}
public void setInputfile(Resource inputfile) {
this.inputfile = inputfile;
}
public Resource getOutputfile() {
return outputfile;
}
public void setOutputfile(Resource outputfile) {
this.outputfile = outputfile;
}
public static void setFileDataListSubro(List<Subrogation> fileDataListSubro) {
SubrogationFileTransferTasklet.fileDataListSubro = fileDataListSubro;
}
public static List<Subrogation> getFileDataListSubro() {
return fileDataListSubro;
}
public static void setMap(TreeMap<String, Subrogation> map) {
SubrogationFileTransferTasklet.map = map;
}
public static TreeMap<String, Subrogation> getMap() {
return map;
}
@Override
public RepeatStatus execute(StepContribution contribution,
ChunkContext chunkContext) throws Exception {
value = (String) chunkContext.getStepContext().getStepExecution()
.getJobExecution().getExecutionContext().get("outputFile");
readFromFile();
return RepeatStatus.FINISHED;
}
public void readFromFile() {
BufferedReader br = null;
try {
String sCurrentLine;
br = new BufferedReader(new FileReader(inputfile.getFile()));
fileLastName = inputfile.getFile().getName();
while ((sCurrentLine = br.readLine()) != null) {
if (sCurrentLine.indexOf("TRAILER") != -1) {
setTrailer(sCurrentLine);
} else if (sCurrentLine.indexOf("HEADER") != -1) {
setHeader(sCurrentLine);
} else if (sCurrentLine.equalsIgnoreCase("")) {
} else {
fileDataListS.add(sCurrentLine);
}
}
convertListOfStringToListOfSubrogaion(fileDataListS);
writeDataToFile();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (br != null)
br.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
public void convertListOfStringToListOfSubrogaion(List<String> list) {
Iterator<String> iterator = list.iterator();
while (iterator.hasNext()) {
Subrogation subrogration = new Subrogation();
String s = iterator.next();
subrogration.setGRP_NBR(StringUtils.substring(s, 0, 6));
subrogration.setSECT_NBR(StringUtils.substring(s, 6, 10));
subrogration.setAFP_VAL(StringUtils.substring(s, 10, 13));
subrogration.setDOL_MIN_VAL(StringUtils.substring(s, 13, 20));
subrogration
.setCORP_ENT_CD(StringUtils.substring(s, 20, s.length()));
map.put(subrogration.getGRP_NBR() + subrogration.getSECT_NBR(),
subrogration);
fileDataListSubro.add(subrogration);
}
}
public void writeDataToFile() {
try {
File file = new File(value);
if (!file.exists()) {
logger.info("output file is:-" + file.getAbsolutePath());
file.createNewFile();
}
FileWriter fw = new FileWriter(file.getAbsoluteFile());
BufferedWriter bw = new BufferedWriter(fw);
Iterator it = map.entrySet().iterator();
while (it.hasNext()) {
Map.Entry subrogation = (Map.Entry) it.next();
// System.out.println(subrogation.getKey() + " = " +
// subrogation.getValue());
// it.remove(); // avoids a ConcurrentModificationException
bw.append(subrogation.getValue().toString()
+ SubrogationConstants.filler58);
}
bw.close();
} catch (IOException e) {
e.printStackTrace();
}
logger.info("subrogationFileTransferTasklet Step completes");
}
}
在处理器中我想将地图大小放入int。
processor.class
package com.hcsc.ccsp.nonadj.subrogation.processor;
import org.apache.commons.lang3.StringUtils;
import org.springframework.batch.item.ItemProcessor;
import com.hcsc.ccsp.nonadj.subrogation.Utils.SubrogationUtils;
import com.hcsc.ccsp.nonadj.subrogation.batch.Subrogation;
import com.hcsc.ccsp.nonadj.subrogation.common.SubrogationConstants;
import com.hcsc.ccsp.nonadj.subrogation.integration.SubrogationFileTransferTasklet;
public class SubrogationProcessor implements
ItemProcessor<Subrogation, Subrogation> {
public SubrogationFileTransferTasklet fileTransferTasklet = new SubrogationFileTransferTasklet();
SubrogationUtils subrogationUtils = new SubrogationUtils();
public int countFromFile=SubrogationFileTransferTasklet.map.size();
public static int totalRecords = 0;
public static int duplicate = 0;
@Override
public Subrogation process(Subrogation subrogration) throws Exception {
// TODO Auto-generated method stub
if (subrogationUtils.validateData(subrogration)) {
Subrogation newSubro = new Subrogation();
newSubro.setGRP_NBR(StringUtils.leftPad(subrogration.getGRP_NBR()
.trim(), SubrogationConstants.length6, "0"));
if (subrogration.getSECT_NBR().trim().length() < 5) {
newSubro.setSECT_NBR(StringUtils.leftPad(subrogration
.getSECT_NBR().trim(), SubrogationConstants.length4,
"0"));
} else if (subrogration.getSECT_NBR().trim().length() == 5) {
newSubro.setSECT_NBR(StringUtils.substring(subrogration.getSECT_NBR().trim(), 1));
} else {
return null;
}
newSubro.setAFP_VAL(StringUtils.leftPad(subrogration.getAFP_VAL()
.trim(), SubrogationConstants.length3, "0"));
if (subrogration.getDOL_MIN_VAL().trim().contains(".")) {
newSubro.setDOL_MIN_VAL(StringUtils.leftPad(StringUtils.substring(subrogration.getDOL_MIN_VAL(),0,subrogration.getDOL_MIN_VAL().indexOf(".")), SubrogationConstants.length7,
"0"));
} else {
newSubro.setDOL_MIN_VAL(StringUtils.leftPad(subrogration
.getDOL_MIN_VAL().trim(), SubrogationConstants.length7,
"0"));
}
newSubro.setCORP_ENT_CD(StringUtils.substring(
subrogration.getCORP_ENT_CD(), 0, 2));
if (SubrogationFileTransferTasklet.map.containsKey(newSubro
.getGRP_NBR() + newSubro.getSECT_NBR())) {
duplicate++;
return null;
} else {
if(SubrogationFileTransferTasklet.fileLastName.contains("TX")){
if(newSubro.getCORP_ENT_CD().equalsIgnoreCase("TX")){
SubrogationFileTransferTasklet.map.put(newSubro
.getGRP_NBR() + newSubro.getSECT_NBR(), newSubro);
totalRecords++;
return newSubro;
}
}
else{
if(SubrogationFileTransferTasklet.fileLastName.contains("IL")){
if(!newSubro.getCORP_ENT_CD().equalsIgnoreCase("TX"))
{
newSubro.setCORP_ENT_CD("IL");
SubrogationFileTransferTasklet.map.put(newSubro
.getGRP_NBR() + newSubro.getSECT_NBR(), newSubro);
totalRecords++;
return newSubro;
}
}
else{
return null;
}
}
return null;
}
}
else {
return null;
}
}
}
class SubrogrationException extends RuntimeException {
private static final long serialVersionUID = -8971030257905108630L;
public SubrogrationException(String message) {
super(message);
}
}
最后我想在其他类中使用countFromFile ..
writer.class
package com.hcsc.ccsp.nonadj.subrogation.writer;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.LineNumberReader;
import java.io.Writer;
import java.util.Date;
import java.util.List;
import org.apache.commons.lang3.StringUtils;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import org.springframework.batch.item.ItemStreamException;
import org.springframework.batch.item.ItemWriter;
import org.springframework.batch.item.file.FlatFileFooterCallback;
import org.springframework.batch.item.file.FlatFileHeaderCallback;
import com.hcsc.ccsp.nonadj.subrogation.Utils.SubrogationUtils;
import com.hcsc.ccsp.nonadj.subrogation.batch.Subrogation;
import com.hcsc.ccsp.nonadj.subrogation.common.SubrogationConstants;
import com.hcsc.ccsp.nonadj.subrogation.integration.SubrogationFileTransferTasklet;
import com.hcsc.ccsp.nonadj.subrogation.processor.SubrogationProcessor;
public class SubrogationHeaderFooterWriter implements FlatFileFooterCallback,FlatFileHeaderCallback{
private Logger logger = LogManager
.getLogger(SubrogationHeaderFooterWriter.class);
SubrogationFileTransferTasklet fileTransferTasklet = new SubrogationFileTransferTasklet();
SubrogationUtils subrogationUtils=new SubrogationUtils();
SubrogationProcessor processor=new SubrogationProcessor();
private ItemWriter<Subrogation> delegate;
public void setDelegate(ItemWriter<Subrogation> delegate) {
this.delegate = delegate;
}
public ItemWriter<Subrogation> getDelegate() {
return delegate;
}
@Override
public void writeHeader(Writer writer) throws IOException {
//writer.write(SubrogationFileTransferTasklet.header);
}
@Override
public void writeFooter(Writer writer) throws IOException {
String trailer = SubrogationFileTransferTasklet.trailer;
String s1 = StringUtils.substring(trailer, 0, 23);
logger.info(" Data from input file size is---- "+new SubrogationProcessor().countFromFile);
int trailerCounter=new SubrogationProcessor().countFromFile+SubrogationProcessor.totalRecords;
logger.info(" Data comming from database is"+SubrogationProcessor.totalRecords);
logger.info(" Duplicate data From DataBase is " +SubrogationProcessor.duplicate);
logger.info(" Traileer is " + s1+ trailerCounter);
writer.write(s1 + trailerCounter);
SubrogationFileTransferTasklet.map.clear();
SubrogationFileTransferTasklet.fileDataListSubro.clear();
SubrogationProcessor.totalRecords=0;
SubrogationProcessor.duplicate=0;
}
public void writeErrorDataToFile(List<String> errorDataList,String errorfile){
File file;
try {
file = new File(errorfile);
logger.info("error file is "+errorfile);
FileWriter fileWriter = new FileWriter(file,true);
BufferedWriter bufferWritter = new BufferedWriter(fileWriter);
for(String data:errorDataList){
bufferWritter.write(new Date()+" "+data);
bufferWritter.write(SubrogationConstants.LINE_SEPARATOR);
}
bufferWritter.close();
}
catch (IOException e) {
throw new ItemStreamException("Could not convert resource to file: [" + errorfile + "]", e);
}
}
/*
public void write(List<? extends Subrogation> subrogation) throws Exception {
System.out.println("inside writer");
delegate.write(subrogation);
}*/
}
所以这里记录器massage.size打印0 .... 我无法理解为什么???
答案 0 :(得分：1)
以这种方式确保在构造对象时使用当前的地图大小初始化它。
class SubrogationProcessor{
public int countFromFile;
public SubrogationProcessor(){
countFromFile=SubrogationFileTransferTasklet.map.size();
}
}
答案 1 :(得分：1)
这取决于运行“map.put”代码行的时间。它是在tasklet类的静态块中吗？
如果在将记录添加到地图之前初始化处理器实例，则map.size（）确实为0。
我的建议是尽可能将映射添加到静态块中，或者调试代码并查看调用.size（）方法时调用.put（）方法的时间
public static TreeMap<String, Subrogation> map = new TreeMap<String, Subrogation>();
static{
map.put(subrogration.getGRP_NBR() + subrogration.getSECT_NBR(), subrogration);
}