java处理金证中登查询图片二进制流问题

package com.szkingdom.kess.model;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.List;
import java.util.Vector;

import org.apache.axis.encoding.Base64;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;

import com.szkingdom.kess.service.ConfigService;
import com.szkingdom.kess.ui.ClientFrame;

/**
 * 处理接口的返回结果集
 */
public class ServiceResult {

private String operation = null;
private String resultStr = null;

private String recordType = null;
private String binaryOutput = null;
private String flag = null;
private String prompt = null;

private String[] resultHeads = new String[0];
private Vector<Vector<String>> allRecord = new Vector<Vector<String>>();

private byte[] imgBytes = null;

private String recordXml = null;

public ServiceResult(String operation, String resultStr) throws DocumentException, IOException {
this.operation = operation;
this.resultStr = resultStr;
Service service = ConfigService.getInstance().getServices().getService(operation);
this.recordType = service.getRecordType();
this.binaryOutput = service.getBinaryOutput();
if(null == this.binaryOutput || this.binaryOutput.equals("0")) { //处理xml格式的数据
handleXmlResult(resultStr);
}
else { //处理二进制的数据,图片
byte[] resultStrBytes = Base64.decode(resultStr);
if(4 == resultStrBytes.length) {
handleXmlResult(ClientFrame.clientReqServices.parseXMLResultError("未能查询到对应的影像数据"));
}
else {
int xmlLen = 0;
for (int i = 0; i < 4; i++) {
int shift = (4 - 1 - i) * 8;
xmlLen += (resultStrBytes[i + 0] & 0x000000FF) << shift;
}
this.resultStr = new String(resultStrBytes, 4, xmlLen);
handleXmlResult(this.resultStr);

imgBytes = new byte[resultStrBytes.length - xmlLen - 4];
System.arraycopy(resultStrBytes, xmlLen + 4, imgBytes, 0, imgBytes.length);
File file = new File("images");
if(!file.exists()) {
file.mkdir();
}
FileOutputStream fops = new FileOutputStream(new File("images/download" + getImgType(imgBytes)));
fops.write(imgBytes);
fops.close();
}
}
}

private void handleXmlResult(String xmlStr) throws DocumentException {
Document doc = DocumentHelper.parseText(xmlStr);
Element rootEle = doc.getRootElement();
Element resultEle = rootEle.element("result");
this.flag = resultEle.element("flag").getText();
this.prompt = resultEle.element("prompt").getText();
List<Element> rowEleList = rootEle.element("record").elements("row");
if(this.recordType.equals("1")) {
for(int i = 0, rowLen = rowEleList.size(); i < rowLen; i++) {
Element rowEle = rowEleList.get(i);
List<Element> resultEleList = rowEle.elements();
int resultLen = resultEleList.size();
if(0 == i) {
resultHeads = new String[resultLen];
}
Vector<String> tmpVec = new Vector<String>();
for(int j = 0; j < resultLen; j++) {
Element rowResultEle = resultEleList.get(j);
if(0 == i) {
resultHeads[j] = rowResultEle.getName();
}
tmpVec.add(rowResultEle.getText());

}
allRecord.add(tmpVec);
}
}
else {
String recordNodeXml = rootEle.element("record").asXML();
recordXml = recordNodeXml.equals("<record/>") ? "" : 
recordNodeXml.substring(recordNodeXml.indexOf("<record>") + 8, recordNodeXml.lastIndexOf("</record>"));
}
}

private String getImgType(byte[] imgBytes) {
if(null == imgBytes) {
return null;
}

StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < 4; i++) {
String hexStr = Integer.toHexString(imgBytes[i] & 0xFF); //byte to int
stringBuilder.append(hexStr.length() < 2 ? "0" : hexStr);
}
String typeStr = stringBuilder.toString().toUpperCase();

if(typeStr.contains("424D")) {
return ".bmp";
}
if(typeStr.contains("FFD8FF")) {
return ".jpg";
}
if(typeStr.contains("47494638")) {
return ".gif";
}
if(typeStr.contains("49492A0")) { //tif格式有两个版本的标准，"49492A00"
return ".tif";
}
if(typeStr.contains("89504E47")) {
return".png";
}

return ".jpg";
}

public String getResultStr() {
StringBuilder strBuilder = new StringBuilder();
strBuilder.append("接口名称:" + this.operation + "\n");
strBuilder.append("执行结果:" + ("1".equals(this.flag) ? "执行成功" : "执行失败") + "\n");
strBuilder.append("提示信息:" + this.prompt + "\n");

StringBuilder strBuilderRec = new StringBuilder();
if(this.recordType.equals("1")) {
for(int i = 0; i < this.resultHeads.length; i++) {
strBuilderRec.append(this.resultHeads[i].trim() + "\t");
}
strBuilderRec.append("\n");
for(int i = 0, rowLen = this.allRecord.size(); i < rowLen; i++) {
Vector<String> rowVec = this.allRecord.get(i);
for(int j = 0, colLen = rowVec.size(); j < colLen; j++) {
strBuilderRec.append(rowVec.get(j).trim() + "\t");
}
strBuilderRec.append("\n");
}
}
else {
strBuilderRec.append(this.recordXml);
}
String recStr = strBuilderRec.toString().trim();
strBuilder.append(recStr.equals("") ? "" : "返回结果:\n" + recStr);
return strBuilder.toString();
}
public byte[] getImgBytes() {
return imgBytes;
}

public String getOperation() {
return operation;
}

public String getRecordType() {
return recordType;
}

public String getFlag() {
return flag;
}

public String getPrompt() {
return prompt;
}

public String[] getResultHeads() {
return resultHeads;
}

public String getRecordXml() {
return recordXml;
}
}