利用ItextPdf、core-renderer-R8 来生成PDF
近期因为工作上的须要，须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，并且格式上要求和简历的格式排版时一致的!前期调研、开发，最后測试上线。差点儿相同花了7天的时间。当然，期间主要完毕了主体功能。如今的话，该功能已经相当完好。
以下，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须要的人。
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，在网上看了非常多关于转pdf的相关文章和技术框架，具体的我不想在此一一赘述，整体给我的感觉就是，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代码。来适应中文等相关的本土化须要。
第二：国内有关生产pdf的需求一般都非常easy。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全然一致，样式排版全然一致！
需求和思路
详细需求就是：
思路
1、首先通过相关功能接口。取出这个简历的全部数据。
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：取出相关简历的全部数据
第二步：通过freemarker生成静态页面。
<#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">${project}</span>
<div class="h-seperator"></div>
<!--项目模板代码開始-->
<!--项目经历開始-->
<#list experience as experiences>
<div class="enterprise">
<span class="timestamp simple-item">${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>
<!--项目名称開始-->
<#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">${projects.project.core_goal}</span>
<!--标签、事情開始-->
<#list projects.tags as tags>
<div class="capacity-block">
<div class="capacity-group">
<!--标签開始-->
<#list tags.tags as tag>
<span class="tag">${tag.base_tag_name}</span>
</#list>
<!--标签结束-->
<!--事情開始-->
<#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。网上非常多，我也是现学现用的。
@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;
//获取全部的数据
//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;
}
//project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project根文件夹
String s = getPath(request,response);
path = s+id+"_mojianli.html";
Writer out = new OutputStreamWriter(new FileOutputStream(path),"UTF-8");
//最后開始生成
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能够无论。填上自己的数据即可了。
//html转成pdf
private boolean html2Pdf(HttpServletRequest request,HttpServletResponse response,String name,long id,String postionName) throws IOException, DocumentException, ParserConfigurationException {
boolean bl = false;
//project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，此字体必需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);//文件输出根文件夹下
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;
}
这里须要注意的两点是：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。 细致看代码凝视，上面都有。
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");//解决下载文件里文标题乱码问题
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：注意下载文件里文标题乱码问题至此，以上整体的代码大概是这样。须要的人，能够多看看，假设有什么问题，欢迎随时私信、留言等交流。
