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设计思路采用生产者消费者模式，生产者生产报表消费者消费报表生成pdf文件其中报表以html形式存储在线程安全列表中．使用到技术有:多线程协作，线程池，线程安全，html 生成pdf.
一．生产者生成html模版，方式通过多线程将数据和html模版整合技术是使用freemarker.
1．ValPdfProduce
package hk.buttonwood.ops.report;
import java.io.File;
import java.util.HashMap;
import java.util.List;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import hk.buttonwood.ops.pdf.Msg;
import hk.buttonwood.ops.pdf.PdfProducer;
import hk.buttonwood.ops.portfolio.PortfolioService;
import net.zweb.core.ioc.annotation.Inject;
import net.zweb.core.ioc.annotation.Resource;
import net.zweb.core.util.FileUtil;
/**
* @author maybo 2015年10月31日
*/
@Resource
public class ValPdfProduce {
private String root = "/home/maybo/myProject/";// 保存文件的根目录
private String tPath = "src/main/webapp/WEB-INF/templates/ops/report/cash_pdf.html";// html模版文件
public ThreadPoolExecutor producerPool;
public PdfProducer pdfProducer;
@Inject
private PortfolioService portfolioService;// 投资组合服务用于获取所有列
private ValProducer producer;
public ThreadPoolExecutor getProducerPool() {
return this.producerPool;
}
public void setPortfolioService(PortfolioService portfolioService) {
this.portfolioService = portfolioService;
}
public ValPdfProduce(String root, String tPath, ValProducer producer) {
this.root = root;
this.tPath = tPath;
this.producer = producer;
}
public ValPdfProduce() {
}
/*
* 生成pdf
*/
public void produce(List<Integer> portfolios,String from,String to,String root, String tPath, ValProducer producer) {
this.root=root;
this.tPath=tPath;
this.producer=producer;
int cpu = Runtime.getRuntime().availableProcessors();
Msg msg=new Msg();
//如果portfolio存在无需查询
if(portfolios==null||portfolios.size()<=0){
// 获取所有portfolio列表
portfolios = this.portfolioService.findAll();
}
if (portfolios == null || portfolios.isEmpty()||portfolios.size()<=0) {
Msg.State state=new Msg.State();
state.setState(Msg.State.NO_DATA);
msg.add(state);
msg.setTotal(-1);
return;
}
pdfProducer = PdfProducer.newInstance();
LinkedBlockingQueue<HashMap<String, Object>> queue = pdfProducer.getCached();
String html = htmlToString(tPath);
if (html == null || html == "") {
Msg.State state=new Msg.State();
state.setState(Msg.State.NO_DATA);
msg.add(state);
msg.setTotal(-1);
return;
}
msg.setTotal(portfolios.size());
pdfProducer.setMsg(msg);
// 开启一个生产估值数据的线程池
producerPool = new ThreadPoolExecutor(cpu / 2, 500, 5, TimeUnit.MINUTES, new ArrayBlockingQueue<Runnable>(500));
for (Integer p : portfolios) {
if (p< 0) {//但没有值时返回状态
Msg.State state=new Msg.State();
state.setPortfolio(p);
state.setState(Msg.State.NO_DATA);
msg.add(state);
continue;
}
producerPool.execute(new ValProduceTask( msg,queue, p,html, root, this.producer,from,to));
try {
pdfProducer.addTask(null);
} catch (Exception e) {
e.printStackTrace();
}
}
try {
pdfProducer.shutDown();
} catch (Exception e) {
e.printStackTrace();
}
producerPool.shutdown();
}
/*
* 将html和数据整合到一起
*
* @param:html文件路径
*
*/
private String htmlToString(String htmlFile) {
String html = "";
File file = new File(htmlFile);
if (file.exists() && file.isFile()) {
html = FileUtil.readFile(file);
}
return html;
}
}
2．
package hk.buttonwood.ops.report;
import java.util.Map;
import hk.buttonwood.ops.pdf.ExcTask;
/**
* @author maybo 2015年10月31日
*/
public abstract class ValProducer{
/*
* 将月结单数据保存到数据模版中
*
* @param:portfolio中id
*
* @param:保存文件的根目录
*
* @param:htmlFile的位置
* @param:更新日期
*/
protected abstract Map<String, Object> valToPdfTemplate(int portfolio,String root, String html,String date);
/*
* 将月结单数据保存到数据模版中
*
* @param:portfolio中id
*
* @param:保存文件的根目录
*
* @param:htmlFile的位置
*
* @param:更新日期
* @param:截至日期
*/
protected abstract Map<String, Object> valToPdfTemplate(int portfolio, String root, String html,String from,String to);
}
３．生产任务
package hk.buttonwood.ops.report;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.LinkedBlockingQueue;
import hk.buttonwood.ops.pdf.Msg;
/*
* 建立一个获取数据的线程
*/
/**
* @author maybo
* 2015年10月31日
*/
public class ValProduceTask extends Thread {
// 线程安全队列用以存储数据
private LinkedBlockingQueue<HashMap<String, Object>> queue;
private int portfolio;// 投资组合的id
private String from;// 当前日期
private String html;// html模版
private String root;// 存储的根目录
private ValProducer valProducer;// 获取相应的数据
private String to;// 截至日期日期
private Msg msg;//执行状态
/*
* 传递所需数据
*
* @param:缓存队列
*
* @param：投资组合id
*
* @param:查询日期
*
* @param:html模版
*
* @param：提供的数据获取方法有调用者实现传递
*
* @param:跟目录
*
* @保存文件名
*/
public ValProduceTask(Msg msg,LinkedBlockingQueue<HashMap<String, Object>> queue, int portfolio,String html,
String root, ValProducer valProducer,String from,String to) {
this.queue = queue;
this.from = from;
this.html = html;
this.to=to;
this.portfolio = portfolio;
this.root = root;
this.valProducer = valProducer;
this.msg=msg;
}
@Override
public void run() {
synchronized (queue) {
Map<String, Object> data;
if(to==null){
data = valProducer.valToPdfTemplate(portfolio,root, html, from);
}else{
data = valProducer.valToPdfTemplate(portfolio,root, html, from,to);
}
if (data != null) {
queue.add((HashMap<String, Object>) data);
}else{
Msg.State state=new Msg.State();
state.setPortfolio(this.portfolio);
state.setState(Msg.State.NO_DATA);
msg.add(state);
}
queue.notifyAll();
}
}
}
二．消费者也就是pdf的生产者消费html模版生成pdf.
1．底层类实现将html to pdf.
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package zweb.plugins.pdf;
/**
*
* @author john
*/
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.util.HashMap;
import java.util.Map;
import net.zweb.core.config.Config;
import net.zweb.core.config.MapConfig;
import net.zweb.core.util.FileUtil;
import org.apache.commons.lang.StringUtils;
import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Document;
import com.itextpdf.text.Font;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.tool.xml.XMLWorkerFontProvider;
import com.itextpdf.tool.xml.XMLWorkerHelper;
public class HtmlToPDF {
private HeaderFooter headerFooter = null;
public HtmlToPDF(){
}
public HtmlToPDF(HeaderFooter headerFooter){
this.headerFooter = headerFooter;
}
public String print(String html, Map<String, Object> data, String path) throws Exception {
try {
Document document = null;
if(data!=null){
Config<String, Object> cfg = new MapConfig<String, Object>(data);
String pageSize = cfg.getString("pageSize");
String direction = cfg.getString("direction");
if(StringUtils.isBlank(pageSize)){
pageSize = "letter";
}
if(StringUtils.isBlank(direction))
direction = "verticle";
if(StringUtils.equals(direction, "verticle"))
document = new Document(PageSize.getRectangle(pageSize)); // 竖向打印
else
document = new Document(PageSize.getRectangle(pageSize).rotate()); // 横向打印
}else{
document = new Document(PageSize.LETTER);
}
PdfWriter pdfWriter = PdfWriter.getInstance(document, new FileOutputStream(path));
if (this.headerFooter != null)
pdfWriter.setPageEvent(headerFooter);
document.open();
document.addAuthor(String.valueOf(data.get("author")));
document.addCreator(String.valueOf(data.get("creator")));
document.addSubject(String.valueOf(data.get("subject")));
document.addCreationDate();
document.addTitle(String.valueOf(data.get("title")));
XMLWorkerHelper worker = XMLWorkerHelper.getInstance();
// worker.parseXHtml(pdfWriter, document, new StringReader(str));
worker.parseXHtml(pdfWriter, document, new ByteArrayInputStream(html.getBytes()), null,
new XMLWorkerFontProvider(){
@Override
public Font getFont(final String fontname, final String encoding,
final boolean embedded, final float size, final int style,final BaseColor color) {
String fntname = fontname;
if(fntname==null){
fntname="宋体";
fntname="微软雅黑";
// fntname="uming";
}
return super.getFont(fntname, encoding, size, style);
}
}
);
// worker.parseXHtml(pdfWriter, document, new
// ByteArrayInputStream(html.getBytes()));
document.close();
} catch (Exception e) {
throw e;
}
return null;
}
public static void main(String... args) throws Exception {
String root = "src/main/webapp";
HeaderFooter headerFooter = new HeaderFooter(root);
headerFooter.setPrintDirection("horizon");
headerFooter.setX(-30);
headerFooter.setY(630);
headerFooter.setImg("/images/print_holder.png");
HtmlToPDF toPdf = new HtmlToPDF(headerFooter);
String path = "d:/testpdf3.pdf";
//String str = FileUtil.readFile(new File("src/main/webapp/WEB-INF/templates/custody/fund/voucher/print.html"));
String str = FileUtil.readFile(new File("src/main/webapp/WEB-INF/templates/register/holder/print_bond.html"));
Map<String, Object> data = new HashMap<String, Object>();
data.put("author", "author");
data.put("creator", "creator");
data.put("subject", "subject");
data.put("title", "title");
data.put("direction", "horizon");
data.put("pageSize", "A4");
toPdf.print(str, data, path);
}
}
2．PdfPrint 基本执行生成pdf.
package hk.buttonwood.ops.pdf;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import net.zweb.core.mvc.template.AbstractTemplateEnginePlugin;
import net.zweb.core.mvc.template.TemplateEngine;
import zweb.plugins.pdf.HeaderFooter;
import zweb.plugins.velocity.VelocityPlugin;
public class PrintPdf implements ExcTask {
private Map<String, Object> data;
private static TemplateEngine engine;
private HeaderFooter headerFooter;
private Logger logger=LoggerFactory.getLogger(PdfTask.class);
static {
AbstractTemplateEnginePlugin plugin = new VelocityPlugin();
engine = plugin.templateEngine();
}
public PrintPdf(Map<String, Object> data,HeaderFooter headerFooter) {
this.data = data;
this.headerFooter=headerFooter;
}
@SuppressWarnings("unchecked")
@Override
public void excute() throws Exception {
String html = "";
html = htmlToString((String) data.get("html"), (Map<String, Object>) data.get("datas"));
if ("".equals(html)) {
return;
}
new BuildPdfUtil(this.headerFooter).build(html, (String) data.get("saveFile"), (Map<String, Object>) data.get("datas"));
logger.debug((String)data.get("saveFile")+"---------------完成");
}
/*
* 将html和数据整合到一起
*
* @param:html文件路径
*
* @param:数据模型
*/
private String htmlToString(String html, Map<String, Object> datas) {
String htl = "";
htl = engine.render(html, datas);
return htl;
}
}
3．线程任务生成pdf调用PdfPrint
package hk.buttonwood.ops.pdf;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.LinkedBlockingQueue;
import zweb.plugins.pdf.HeaderFooter;
/**
* @author maybo 2015年10月28日 估值报告线程任务
*/
public class PdfTask extends Thread {
// 线程安全队列用以存储数据
private LinkedBlockingQueue<HashMap<String, Object>> queue;
private HeaderFooter headerFooter;
private Msg msg;
public PdfTask(LinkedBlockingQueue<HashMap<String, Object>> queue,HeaderFooter headerFooter,Msg msg) {
this.queue = queue;
this.headerFooter=headerFooter;
this.msg=msg;
}
@Override
public void run() {
synchronized(queue){
while (queue.size() <= 0) {
try {
queue.wait();
} catch (InterruptedException e) {
e.printStackTrace();
queue.notifyAll();
}
}
Map<String, Object> data = queue.poll();
queue.notifyAll();
try {
ExcTask excTask = new PrintPdf(data,headerFooter);
excTask.excute();
Msg.State state=new Msg.State();
if(data.get("portfolio")!=null){
state.setPortfolio((Integer)data.get("portfolio"));
state.setState(Msg.State.OK);
msg.add(state);
}
} catch (Exception e1) {
Msg.State state=new Msg.State();
if(data.get("portfolio")!=null){
state.setPortfolio((Integer)data.get("portfolio"));
state.setState(Msg.State.ERROR);
msg.add(state);
}
e1.printStackTrace();
}
}
}
}
4．PdfProducer //也就是消费者
package hk.buttonwood.ops.pdf;
import java.util.HashMap;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import zweb.plugins.pdf.HeaderFooter;
public class PdfProducer {
private LinkedBlockingQueue<HashMap<String, Object>> queue;
private ThreadPoolExecutor pool;
private Msg msg;
private PdfProducer() {
}
public static PdfProducer newInstance() {
PdfProducer pdfProducer = new PdfProducer();
int cpu = Runtime.getRuntime().availableProcessors();// 获取cpu核数
pdfProducer.queue = new LinkedBlockingQueue<HashMap<String, Object>>();// 创建队列用于缓存任务
// 开启一个生产估值数据的线程池
pdfProducer.pool = new ThreadPoolExecutor(cpu / 2-1<=0?1:cpu/2-1, 500, 5, TimeUnit.MINUTES,
new ArrayBlockingQueue<Runnable>(500));// 开启线程池
return pdfProducer;
}
public LinkedBlockingQueue<HashMap<String, Object>> getCached() {
return queue;
}
public void setMsg(Msg msg) {
this.msg = msg;
}
public Msg getMsg() {
return this.msg;
}
// 关闭线程池
public void shutDown() {
this.pool.shutdown();
}
// 现在关闭
public void shutDownNow() {
this.pool.shutdownNow();
}
// 关闭状态
public boolean isShutDown() {
return this.pool.isShutdown();
}
// 是否完成任务
public boolean isTerminated() {
return this.pool.isTerminated();
}
public boolean isTerminating() {
return this.pool.isTerminating();
}
/*
* 添加任务数
* param:pdf的页眉
*/
public void addTask(HeaderFooter footer) throws Exception {
if (this.isShutDown()) {
throw new Exception("已经关闭任务.");
}
pool.execute(new PdfTask(queue,footer,msg));
}
}
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原文地址：http://www.cnblogs.com/maybo/p/5182528.html
