利用ItextPdf、core-renderer-R8 来生成PDF

最近由于工作上的需要,需要做一个简历产品的下载功能,而下载的形式要去为PDF,内容要求为整个简历的内容,而且格式上要求和简历的格式排版时一致的!前期调研、开发,最后测试上线,差不多花了7天的时间,当然,期间主要完成了主体功能,现在的话,该功能已经相当完善。下面,我主要是总结下我在这个开发的过程中遇到的问题和总结的心得,希望能帮组有这方面需要的人。

原创文章,转载请注明出处:http://blog.csdn.net/jessonlv

前期调研

前期调研的时候,在网上看了很多关于转pdf的相关文章和技术框架,详细的我不想在此一一赘述,总体给我的感觉就是,第一:国外的相关技术框架做的就是好,关于这方面的,基本都是国外的技术,最多也就是国内牛人改改源码,来适应中文等相关的本土化需要。第二:国内有关生产pdf的需求一般都很简单,要么就是简单文本,复杂的最多也就是相关报表等,基本么有自己想要实现的那么复杂的内容、排版。尤其是生成的内容要和也也面上的内容完全一致,样式排版完全一致!

需求和思路

具体需求就是:

1、产品是一个简历产品,简历上展示的所有数据都是通过动态获取的。
2、要求内容一致,并保持样式排版一致!
首先大家可以看下我们这个产品的下载功能的应用,网址:www.mojianli.com  右上角的下载功能。 

思路    

大体思路:取出简历所有数据-->通过freemarker生成静态页面-->将html静态页面转换成PDF
这样的思路主要是保证pdf的样式要和页面样式一致。

1、首先通过相关功能接口,取出这个简历的所有数据。

2、通过freemarker排版输出的html静态页面。静态页面的样式决定了生成的pdf的样式。

3、读取html静态页面,转换成pdf。

4、将pdf输出在浏览器,实现下载功能。

开发过程

第一步:取出相关简历的所有数据

这个是和项目相关的,就不再此赘述,换成你自己想要生成的pdf内容即可。

第二步:通过freemarker生成静态页面。

首先,利用了freemarker框架,对此框架不熟悉的请自行学习,本问的重点是生成pdf,为了让大家明白此功能的应用场景,所有写了很多,但用到的pdf之外的相关技术,请大家自行学习。
freemarker模板代码:
<#assign freemarkerTool= "com.shengao.mojianli.util.FreemarkerTool"?new()>  
<html>

<head>
    <title>mojianli</title>
        <style>
        @font-face {
            font-family: 'Microsoft YaHei';
            font-family: 'Arial';
        }

        html, body, p {
            margin: 0;
            padding: 0;
        }

        span {
            line-height: 1px;
        }

        body {
            font-family: 'Microsoft YaHei';
            font-size: 11px;
            color: #666666;
        }

        .wrapper {
            width: 900px;
            margin: 0 auto;
        }

        .block {
            margin-top: 20px;//+2
        }

        .align-center {
            text-align: center;
            margin-left: 252px;
            width: 200px;
        }

        #name {
            font-size: 25px;
            margin-top: 0px;
            color: #333333;
            margin-bottom: 0;
        }

        #phone {
            font-size: 12px;
            margin-top: 12px;
            font-family: "Arial";
        }

        #email {
            font-size: 11px;
            margin-top: 4px;
            font-family: "Arial";
        }

        .timestamp {
            display: inline-block;
            width: 110px;
        }

        .title {
            font-size: 13px;
        }

        .simple-module {
            margin-bottom: 10px;
            font-size: 11px;
        }
        
		.simple-module-item{
			font-size: 11px;
            margin-right: 16px;
		}
        .simple-item {
            font-size: 11px;
            margin-right: 16px;
        }
        .item_thing {
            font-size: 11px;
            margin-right: 6px;
            line-height: 18px;
        }
        .label {
            background: #666;
            border-radius: 1px;
            color: white;
            font-size: 7px;
            position: relative;
            top: -1px;
            line-height: 7px;
        }

        .product {
            margin-left: 150px;
            margin-bottom: 5px;
            margin-top: 4px;
            width:750px;
        }

        .capacity-block {
            margin-left: 22px;
        }

        .things {
            padding-left: 12px;
            margin-top: 5px;
            background: url(img/dot.png) left top no-repeat;
        }

        .tag {
            background: #333333;
            border-radius: 1px;
            color: white;
            font-size: 11px;
            padding: 0 1px 1px 1px;
   			margin-right: 4px;
   			border-radius: 1px;
   			 
        }
        .enterprise{
        	margin-bottom: 9px;
        }
		.enterprise .simple-item {
		  margin-bottom: 5px;
		}
		.capacity-group {
		  margin-top: 5px;
		  width: 520px;
		}
        .paragraph {
            line-height: 16px;
            font-size: 11px;
            margin-bottom: 10px;
            width: 700px;
        }

        .h-seperator {
            border-color: #666;
            margin-top: 7px;
            height: 0;
            border-top: none;
            border-bottom: 1px solid;
            margin-bottom: 6px;
        }
        .company,.department,.title{
        	color: #333;
        }
    </style>
</head>

<body>
<#escape x as x!""></#escape>
<div class="wrapper">
    <div class="block align-center" id="contact">
        <p id="name">${name}</p>

        <p id="phone">${phone}</p>

        <p id="email">${email}</p>
    </div>
    <div class="block" id="education">
        <span class="title">${exp}</span>

        <div class="h-seperator"></div>

    <#list education as education>
    <p class="simple-module">
        <span class="timestamp simple-module-item">${education.start_date} ~ ${education.end_date}</span>
    <span class="simple-module-item"><#if education.university??>${education.university}</#if></span>
    <span class="simple-module-item"><#if education.colleges??>${education.colleges}</#if> · <#if education.major??>${education.major}</#if></span>
        <span class="simple-module-item"><#if education.degree??>${education.degree}</#if></span>
            <span class="simple-module-item"><#if education.explain??>${education.explain}</#if></span>
                </p>
    </#list>
    </div>

    <!--under-->
    <!--割一割-->
    <div class="block" id="experience">
        <span class="title">${project}</span>
        <div class="h-seperator"></div>

        <!--项目模板代码开始-->
        <!--项目经历开始-->
    <#list experience as experiences>
        <div class="enterprise">
            <span class="timestamp simple-item">${experiences.experience.start_date} ~ ${experiences.experience.end_date}</span>
            <span class="simple-item company">${experiences.experience.company}</span>
            <span class="simple-item department">${experiences.experience.department}</span>
            <span class="simple-item title">${experiences.experience.title}</span>

            <!--项目名称开始-->
            <#list experiences.projects as projects>
                <div class="product">
                    <span class="simple-item">${projects.project.name}</span>
                    <span class="simple-item">${projects.project.phase}</span>
                    <span class="simple-item">${projects.project.core_goal}</span>

                    <!--标签、事情开始-->
                    <#list projects.tags as tags>
                        <div class="capacity-block">
                            <div class="capacity-group">
                                <!--标签开始-->
                                <#list tags.tags as tag>
                                    <span class="tag">${tag.base_tag_name}</span>
                                </#list>
                                <!--标签结束-->

                                <!--事情开始-->
                                <#list tags.items as item>
                                    <div class="things">
                                        <#list item.labels as label>
                                            <span class="label">${label.base_label_name}</span>
                                            <span class="item_thing">${label.content}</span>
                                        </#list>
                                    </div>
                                </#list>
                                <!--事情结束-->

                            </div>
                        </div>
                    </#list>
                    <!--标签、事情结束-->

                </div>
            </#list>
            <!--项目名称结束-->

        </div>
    </#list>
        <!--项目名称结束-->
        <!--项目模板代码结束-->
    </div>

    <!--割一割-->
    <div class="block" id="honor">
        <span class="title">${awards}</span>
        <div class="h-seperator"></div>
    <#list awardses as awardses>
        <p class="simple-module">
            <span class="simple-item timestamp">${awardses.start_date} ~ ${awardses.end_date}</span>
            <span class="simple-item"><#if awardses.name??>${awardses.name}</#if></span>
            <span class="simple-item"><#if awardses.level??>${awardses.level}</#if></span>
            <span class="simple-item"><#if awardses.rank??>${awardses.rank}</#if></span>
            <span class="simple-item"><#if awardses.number??>${awardses.number}</#if></span>
        </p>
    </#list>
    </div>
    <div class="block" id="evaluation">
        <span class="title">${evaluate}</span>
        <div class="h-seperator"></div>
    <#list evaluates as evaluates>
        <p class="paragraph">${freemarkerTool(evaluates.content)}</p>
    </#list>
    </div>
</div>
</body>

</html>

模板相关的数据填充,调用java方法的做法等,网上很多,我也是现学现用的。
利用此模板生成的静态页面的样式,就是你想要的pdf的样式。

然后是读取此模板,生成html页面的代码:
@RequestMapping(value = "/createPdf.s", method = {RequestMethod.POST,RequestMethod.GET})
    public void getAllResumeInfoById(HttpServletRequest request, HttpServletResponse response,
                                    @RequestParam(value="id", required = true) Long id) {
    	
    	String perName = ""; 
    	String positionName = "";
    	long resumeId = id;
    	//获取所有的数据
    	//个人基本信息
    	ResumeInfoBean resumeInfo = new ResumeInfoBean();
    	//教育经历
    	List<EducationBean> eduList =  new ArrayList<EducationBean>();
    	//获奖经历
    	List<AwardsBean> awardsList = new ArrayList<AwardsBean>();
    	//个人评价
    	List<EvaluateBean> evaList = new ArrayList<EvaluateBean>();
    	//项目经历
    	List<PdfExperience> pdfExperience = new ArrayList<PdfExperience>();
    	try {
        	Map<String, Object> map = resumeInfoService.getAllResumeInfoById(id);
        	
        	resumeInfo = (ResumeInfoBean)map.get("resumeInfo");
        	eduList = (List<EducationBean>)map.get("education");
        	awardsList = (List<AwardsBean>)map.get("awards");
        	evaList = (List<EvaluateBean>)map.get("evaluates");
        	pdfExperience = (List<PdfExperience>)map.get("experiences");
        	
        	System.out.println("finish...pdfExperience.size=="+pdfExperience.size());
        } catch (Exception e) {
            log.warn(e);
            JsonUtil.errorToClient(response, 400, e.getMessage());
            return;
        }
    	//工程路径
        String path = request.getSession().getServletContext().getRealPath("/");
    	try {

            Configuration cfg = new Configuration();
            cfg.setDirectoryForTemplateLoading(new File(getPath(request,response)));
            cfg.setObjectWrapper(new DefaultObjectWrapper());
            cfg.setDefaultEncoding("UTF-8");   //这个一定要设置,不然在生成的页面中会乱码

            //设置对象包装器
            cfg.setObjectWrapper(new DefaultObjectWrapper());

            //设计异常处理器
            cfg.setTemplateExceptionHandler(TemplateExceptionHandler.IGNORE_HANDLER);

            //准备魔简历数据
            Map<String, Object> ResumeMap = new HashMap<String, Object>();

            //头部信息bean对象
            String name = resumeInfo.getName();
            perName = name;
            positionName = resumeInfo.getBase_position_name();
            String phone = resumeInfo.getMobile();
            String email = resumeInfo.getEmail();
            ResumeMap.put("name",name);
            ResumeMap.put("phone",phone);
            ResumeMap.put("email",email);

            //定义四个模块标题
            ResumeMap.put("exp","教育经历");
            ResumeMap.put("project","项目经历");
            ResumeMap.put("awards","获奖经历");
            ResumeMap.put("evaluate","个人评价");

            //封装教育经历对象数据
            ResumeMap.put("education", eduList);
            String streducationlist = JsonUtil.list2json(eduList);
            	
            //封装项目经历数据
            ResumeMap.put("experience", pdfExperience);
            String strEx= JsonUtil.list2json(pdfExperience);
            System.out.print(strEx);
            //封装获奖经历数据
            ResumeMap.put("awardses",awardsList);
            String strawardsList = JsonUtil.list2json(awardsList);

            //封装个人评价数据
            ResumeMap.put("evaluates",evaList);
            String strevaList = JsonUtil.list2json(evaList);

            //获取指定模板文件
            Template template = cfg.getTemplate("mojianli.ftl");

            //控制台打印
            template.process(ResumeMap, new PrintWriter(System.out));

            //定义输入文件,默认生成在工程根目录
            String s = getPath(request,response);
        	path = s+id+"_mojianli.html";
            Writer out = new OutputStreamWriter(new FileOutputStream(path),"UTF-8");

            //最后开始生成
            template.process(ResumeMap, out);
            System.out.println("create the html successful!!!"+"path="+request.getSession().getServletContext().getRealPath("/"));
        }catch (Exception e){
            e.printStackTrace();
            jsonObjOutPut.clear();
            jsonObjOutPut = JsonUtil.createJsonObject(MSG.STATUS_RESPONSE_FAIL_201, MSG.MSG_RESPONSE_FAIL_201);
            stringOutPutData = JsonUtil.object2json(jsonObjOutPut);
            JsonUtil.jsonStringToClient(response,stringOutPutData);
        }
        boolean boo = false;
        try {
            boo =  html2Pdf(request,response,perName,resumeId,positionName);
        }catch (Exception e){
            e.printStackTrace();
            jsonObjOutPut.clear();
            jsonObjOutPut = JsonUtil.createJsonObject(MSG.STATUS_RESPONSE_FAIL_201, MSG.MSG_RESPONSE_FAIL_201);
            stringOutPutData = JsonUtil.object2json(jsonObjOutPut);
            JsonUtil.jsonStringToClient(response,stringOutPutData);
        }
 }

前半段关于数据的封装等的代码可以不管,填上自己的数据就行了。

生成页面有就是读取相关页面,并生成pdf的代码

//html转成pdf
    private boolean html2Pdf(HttpServletRequest request,HttpServletResponse response,String name,long id,String postionName) throws  IOException, DocumentException, ParserConfigurationException {

    boolean bl = false;
    //工程路径
    /*String separator = File.separator;
	String root = request.getSession().getServletContext().getRealPath("");
    String path = root+separator+"WEB-INF"+separator+"resources"+name+"_"+id+"_mojianli.html";*/
    String path = getPath(request,response)+id+"_mojianli.html";
    //获取已经生成的html页面的路径
    //String path = "F:\\tomcat_myeclipse\\webapps\\mojianli\\WEB-INF\\resources\\mojianli.html";

    //读取html
    FileInputStream fis =new FileInputStream(path);
    StringWriter writers = new StringWriter();
    InputStreamReader isr = null;
    String string = null;
    //此处将io流转换成String
    try {
        isr = new InputStreamReader(fis,"utf-8");//包装基础输入流且指定编码方式
        //将输入流写入输出流
        char[] buffer = new char[2048];
        int n = 0;
        while (-1 != (n = isr.read(buffer))) {
            writers.write(buffer, 0, n);
        }
    }catch (Exception e){
        e.printStackTrace();
    } finally {
        if (isr != null)
            try {
                isr.close();
            } catch (IOException e) {
                e.printStackTrace();
                jsonObjOutPut.clear();
                jsonObjOutPut = JsonUtil.createJsonObject(MSG.STATUS_RESPONSE_FAIL_201, MSG.MSG_RESPONSE_FAIL_201);
                stringOutPutData = JsonUtil.object2json(jsonObjOutPut);
                JsonUtil.jsonStringToClient(response,stringOutPutData);
            }
    }
    if (writers!=null){
        string = writers.toString();
    }
    System.out.print(string);
    //利用renderer来准备数据
    ITextRenderer renderer = new ITextRenderer();
    ITextFontResolver fontResolver = renderer.getFontResolver();

    //设置创建PDF的时候要用的字体,此字体必须要和简历模板的字体保持一致!!
    fontResolver.addFont(getPath(request, response)+"msyh.ttf", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
    fontResolver.addFont(getPath(request, response)+"arial.ttf", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);

    //get font family name
    BaseFont font = null;
    BaseFont font2 = null;
    try {
        font = BaseFont.createFont(getPath(request, response)+"msyh.ttf", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
        font2 = BaseFont.createFont(getPath(request, response)+"arial.ttf", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
    } catch (DocumentException e) {
        e.printStackTrace();
        jsonObjOutPut.clear();
        jsonObjOutPut = JsonUtil.createJsonObject(MSG.STATUS_RESPONSE_FAIL_201, MSG.MSG_RESPONSE_FAIL_201);
        stringOutPutData = JsonUtil.object2json(jsonObjOutPut);
        JsonUtil.jsonStringToClient(response,stringOutPutData);
    }

    //fontFamilyName‘s  value is the key for font-family
    String fontFamilyName = TrueTypeUtil.getFamilyName(font2);
    System.out.println("fontFamilyName222="+fontFamilyName);

    //设置pdf内容!!
    renderer.setDocumentFromString(string);
    //设置图片的绝对路径
    renderer.getSharedContext().setBaseURL("file:"+getPath(request,response)+"\\img");
    System.out.println(getPath(request,response)+"img");
    renderer.layout();

    //create the pdf
    
    //String pdfPath = path+"WEB-INF\\resources\\"+name+"_mojianli.pdf";
    String pdfPath = getPath(request, response)+id+"_mojianli.pdf";
    FileOutputStream outputStream = new FileOutputStream(pdfPath);//文件输出根目录下
    renderer.createPDF(outputStream);
  
    //Finishing up
    //renderer.finishPDF();
    System.out.println("created the pdf !!");
    //下载
    try{
    	//downloadPdf(response,request,name,outputStream);	
    	downLoadPdf(request,response,name,id,postionName);
    }catch (Exception e ){
    	e.printStackTrace();
    }
    
    bl = true;
    return  bl;
    }

这里需要注意的两点是:1、设置中文字体,以及中文字体文件的引用2、引用图片的问题。 仔细看代码注释,上面都有!

生成pdf以后,就是推送到浏览器的问题:
public void downLoadPdf(HttpServletRequest request, HttpServletResponse response,String name,long id,String postionName) {

        try {
        	
        	String separator = File.separator;
        	
        	String root = request.getSession().getServletContext().getRealPath("");
        	
        	String filePath = root+separator+"WEB-INF"+separator+"resources";
        	String headerName = new String(name.getBytes("utf-8"),"iso8859_1");//解决下载文件中文标题乱码问题
        	String postion = new String(postionName.getBytes("utf-8"),"iso8859_1");
			response.setCharacterEncoding("UTF-8");
			response.setContentType("application/pdf");
			response.setHeader("Content-Disposition", "attachment; filename="+headerName+"-"+postion+".pdf");
			
			OutputStream outputStream = response.getOutputStream();
			InputStream inputStream = new FileInputStream(filePath + separator+id+"_mojianli.pdf");

			byte[] buffer = new byte[1024];
			int i = -1;
			while ((i = inputStream.read(buffer)) != -1) 
			{
				outputStream.write(buffer, 0, i);
			}
			outputStream.flush();
			//outputStream.close();
			inputStream.close();
			
        } catch (Exception e) {
        	e.printStackTrace();
            log.warn(e);
            JsonUtil.errorToClient(response, 400, e.getMessage());
            return;
        }
    }
这里的注意点是:注意下载文件中文标题乱码问题

至此,以上总体的代码大概是这样,需要的人,可以多看看,如果有什么问题,欢迎随时私信、留言等交流。
posted @ 2014-07-03 15:41  jessonlv  阅读(820)  评论(0编辑  收藏  举报