说明
调用方法生成PDF时,使用的ftl模版,以及字体都是从jar中读取的,无需担心多节点部署
引用jar
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker-gae</artifactId>
<version>2.3.23</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.76</version>
</dependency>
文件存放路径
// 字体文件
resources/fonts
// 模版文件
resources/templates
代码
import com.lowagie.text.pdf.BaseFont;
import freemarker.cache.StringTemplateLoader;
import freemarker.template.Configuration;
import freemarker.template.Template;
import org.apache.commons.io.FileUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.xhtmlrenderer.pdf.ITextRenderer;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.StringWriter;
import java.util.Map;
@Component
public class PdfHelper {
/**
* classpath路径
*/
private String classpath = getClass().getResource("/").getPath();
/**
* 指定FreeMarker模板文件的位置
*/
private String templatePath = "/templates";
/**
* freeMarker模板文件名称
*/
private String templateFileName = "pdf.ftl";
/**
* 图片路径 —— 默认是classpath下面的images文件夹
*/
private String imagePath = "/images/";
/**
* 字体资源文件 存放路径
*/
private String fontPath = "fonts/";
/**
* 字体 [宋体][simsun.ttc] [黑体][simhei.ttf]
*/
private String font = "simsun.ttc";
/**
* 指定编码
*/
private String encoding = "UTF-8";
@Value("{$file.path}")
private String filePath;
/**
* 生成pdf
*
* @param data 传入到freemarker模板里的数据
* @param out 生成的pdf文件流
*/
public void createPDF(Map<String, Object> data, OutputStream out, String templateName) throws Exception {
// 创建一个FreeMarker实例, 负责管理FreeMarker模板的Configuration实例
Configuration cfg = new Configuration(Configuration.DEFAULT_INCOMPATIBLE_IMPROVEMENTS);
// 指定FreeMarker模板文件的位置
ITextRenderer renderer = new ITextRenderer();
String simsun = System.getProperty("user.dir") + "/simsun.ttc";
String arialuni = System.getProperty("user.dir") + "/arialuni.ttf";
File fondFile = new File(simsun);
if (!fondFile.exists()) {
getFondPath();
}
// 设置 css中 的字体样式(暂时仅支持宋体和黑体)
renderer.getFontResolver().addFont(simsun, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
renderer.getFontResolver().addFont(arialuni, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
StringTemplateLoader stringLoader = new StringTemplateLoader();
String templateString = getFileData("templates/" + templateName);
stringLoader.putTemplate("myTemplate", templateString);
cfg.setTemplateLoader(stringLoader);
Template tpl = cfg.getTemplate("myTemplate", "utf-8");
StringWriter writer = new StringWriter();
// 把null转换成""
Map<String, Object> dataMap = CommunalTool.objectToMap(data);
// 将数据输出到html中
tpl.process(data, writer);
writer.flush();
String html = writer.toString();
// 把html代码传入渲染器中
renderer.setDocumentFromString(html);
renderer.layout();
renderer.createPDF(out, false);
renderer.finishPDF();
out.flush();
out.close();
}
// 读取jar中的ftl模版文件
private String getFileData(String path) {
InputStream stream = getClass().getClassLoader().getResourceAsStream(path);
// log.info("infile:"+infile);
StringBuffer sb = new StringBuffer();
BufferedReader br = null;
try {
br = new BufferedReader(new InputStreamReader(stream, "UTF-8"));
String s = null;
while ((s = br.readLine()) != null) {
sb.append(s);
}
br.close();
return sb.toString();
} catch (Exception e) {
e.printStackTrace();
return null;
} finally {
if (br != null) {
try {
br.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
/**
* 获取字体路径
*
* @return
* @throws IOException
*/
private String getFondPath() throws IOException {
String fontPath = System.getProperty("user.dir");
InputStream inputStream = getClass().getClassLoader().getResourceAsStream("fonts/simsun.ttc");
//在根目录生成一个文件
File targetFile = new File(fontPath + "/simsun.ttc");
// //将流转成File格式
FileUtils.copyInputStreamToFile(inputStream, targetFile);
InputStream arialuniStream = getClass().getClassLoader().getResourceAsStream("fonts/arialuni.ttf");
File arialuni = new File(fontPath + "/arialuni.ttf");
FileUtils.copyInputStreamToFile(arialuniStream, arialuni);
return fontPath;
}
public void setClasspath(String classpath) {
this.classpath = classpath;
}
public void setTemplatePath(String templatePath) {
this.templatePath = templatePath;
}
public void setTemplateFileName(String templateFileName) {
this.templateFileName = templateFileName;
}
public void setImagePath(String imagePath) {
this.imagePath = imagePath;
}
public void setFontPath(String fontPath) {
this.fontPath = fontPath;
}
public void setFont(String font) {
this.font = font;
}
public void setEncoding(String encoding) {
this.encoding = encoding;
}
}
工具类
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.serializer.ValueFilter;
import org.apache.commons.lang3.StringUtils;
import sun.misc.BASE64Encoder;
import java.io.File;
import java.io.FileInputStream;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Map;
public class CommunalTool {
/**
* 转换数据中的null为""(空串)
*
* @param obj 转换之前的数据
* @param beanClass 转换之后的数据类型
* @return 返回Object
* @throws Exception
*/
public static Object objectToData(Object obj, Class<?> beanClass) throws Exception {
return JSONObject.parseObject(objectToString(obj), beanClass);
}
/**
* Map中的null转换成""(空串)
*
* @param map 转换之前的数据
* @return 返回 Map<String,Object>
* @throws Exception
*/
public static Map<String, Object> objectToMap(Map<String, Object> map) throws Exception {
return JSONObject.parseObject(objectToString(map), Map.class);
}
/**
* 把list中的null转换成""(空串)
*
* @param list 转换之前的数据
* @return 返回list
* @throws Exception
*/
public static List objectToList(List list) throws Exception {
return JSONObject.parseObject(objectToString(list), List.class);
}
// fistJson 的一个过滤器
static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
static DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
private static ValueFilter filter = new ValueFilter() {
@Override
public Object process(Object obj, String s, Object v) {
if (v instanceof Date) {
return simpleDateFormat.format(v);
} else {
if (v == null) {
return "";
} else {
return v;
}
}
}
};
/**
* 将对象转换为json格式的字符串
*
* @param obj
* @return String
*/
public static String objectToString(Object obj) {
// JSON.DEFFAULT_DATE_FORMAT = "yyyy-MM-dd";
return JSON.toJSONString(obj, filter, SerializerFeature.WriteNonStringKeyAsString, SerializerFeature.WriteNullStringAsEmpty);
}
/**
* 将图片转成base64 字符串
*
* @param path 文件路径
* @return
* @throws Exception
*/
public static String encodeBase64Picture(String path) throws Exception {
File file = new File(path);
FileInputStream inputFile = new FileInputStream(file);
byte[] buffer = new byte[(int) file.length()];
inputFile.read(buffer);
inputFile.close();
String result = new BASE64Encoder().encode(buffer);
if (StringUtils.isNotBlank(result)) {
result = "data:image/png;base64," + result;
} else {
result = null;
}
return result;
}
/**
* 时间转换 yyyy-MM-dd
*
* @param date
* @return
*/
public static String getTransformationDate(Date date) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(date);
}
/**
* 时间转换 yyyy-MM-dd
*
* @param date
* @return
*/
public static String getTimeDate(Date date) {
int minte = getMinute(date);
minte = minte % 5;
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
Date afterDate = new Date(date.getTime() + 300000);
System.out.println(sdf.format(afterDate));
return "1";
}
/**
* 功能描述:返回分
*
* @param date
* 日期
* @return 返回分钟
*/
public static int getMinute(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(Calendar.MINUTE);
}
/**
* 获取日期年份
* @param date 日期
* @return
*/
public static String FORMAT_FULL = "yyyy-MM-dd HH:mm:ss";
public static String getTime(Date date) {
SimpleDateFormat df = new SimpleDateFormat(FORMAT_FULL);
return df.format(date).substring(12, 16);
}
}
ftl模版
电子化模版单个表格
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="UTF-8" />
<title>模版</title>
<style type="text/css">
body{width:100%;}
@media screen and (max-width: 768px) {
body{font-size: 14px;}
table{table-layout: fixed;} }
p{line-height: 26px;margin-right:15px;}
table td p{line-height:6px;margin-right:0;padding-right:0;padding-left:0;}
span{margin:0;padding:0;}
</style>
<style type="text/css" mcs_bogus="1">
@page {
size: a4 landscape;/*210*297*/
/*size:195mm 271mm;*/
margin: 8mm 8mm;
padding: 0;
/*border:solid #F00 1px;*/
background-image:url(images/water.gif);
background-repeat:no-repeat;
background-position:center;
@top-left {
content: element(header);
}
@bottom-left {
content: element(footer);
}
@bottom-center {
content: "--- " counter(page) " ---" counter(main-heading);
}
@bottom-right {
content: "";
}
}
@page blank {
size: a4 portrait;
/*size:195mm 271mm;*/
margin: 10mm 10mm;
padding: 0;
@top-left {
content: normal
}
@bottom-left {
content: normal
}
@top-right {
content: normal
}
@bottom-right {
content: normal
}
@bottom-center {
content: normal
}
}
#pagenumber:before {
content: counter(page);
}
#pagecount:before {
content: counter(pages);
}
/* Used for generating Table of content */
#toc a::after {
content: leader('.') target-counter(attr(href), page);
}
/* Use this class for
first level titles */
.page_break_before {
page-break-before: always;
}
/* Use this class for forcing page break inside pdf */
.page_breaker {
page-break-after: always;
}
.blank {
page : blank;
}
.version {
page: version;
}
@page :[counter(page)=3] {
margin-top:0;
margin-right:0;
@bottom-center {
content: "第N页";
font-family:SimSun,'宋体';
font-size:10px;
}
}
@page version {
@bottom-left {
content: "version";
margin: 0;
padding: 0;
font-size: 8pt;
font-style:italic;
font-family:SimSun,'宋体';
}
}
/* footnote */
.notebox {
page: notebox;
}
@page notebox {
page-break-after: auto;
}
@media print {
.notebox {
position: relative;
}
.notebox .content {
width: 100%;
margin-bottom: 0px;
}
.notebox .footnote {
position: absolute;
top: 265mm;
left: 0;
z-index: 100;
border-top: 1pt solid #000;
width: 100%;
font-size: 8.76pt;
}
}
body {
line-height: 100%;
font-family:SimSun,'宋体';
/*width:178mm;*/
margin: 0;
}
.page {
/*size:195mm 271mm;*/
height: 100mm;
/*height:246mm; 16K*/
border: 0px;
}
.font {
font-size: 10px;
line-height: 20px;
}
.xhx {
border-bottom:solid 1px #000000;
}
td{
border-top:solid 1px #000000;
border-bottom:solid 0px #000000;
border-left:solid 1px #000000;
border-right:solid 0px #000000;
display:inline-black;
padding:6px 0px 6px 0px;
margin:0px;
}
tr td:last-child {
border-right:solid 1px #000000;
}
table { page-break-inside:auto; -fs-table-paginate:paginate;border-spacing: 0;border-bottom:solid 1px #000000;}
</style>
</head>
<body>
<div style="width:90%;margin:0 auto">
<div>
<h2 style="text-align: center;">${name}</h2>
<div class="Section1">
<div style="width:100%;overflow:hidden;">
<div style="float:left;">
<span>货物交接单号:</span>
<img src="${zhwjjdh}" style="height:50px;width:150px;" />
</div>
<div style="float:right;">
<span>生成时间:2021-12-16</span>
</div>
</div>
<table cellspacing="0" cellpadding="0" style="width:100%;margin:0;text-align: center;border-bottom:solid 0px #000000;" rules="all" border="0">
<thead style="display:table-header-group;border:0px;cellpadding:0;cellspacing:0;height:0px;">
</thead>
<tbody>
<tr style="border-bottom: none">
<td width="15%">工程名称</td>
<td width="85%" style="text-align:left;padding-left:10px;"></td>
</tr>
<tr>
<td >合同名称</td>
<td style="text-align:left;padding-left:10px;"></td>
</tr>
<tr>
<td >合同编号</td>
<td style="text-align:left;padding-left:10px;"></td>
</tr>
<tr>
<td >违约事实</td>
<td style="text-align:left;padding-left:10px;"></td>
</tr>
<tr>
<td >约谈情况</td>
<td style="text-align:left;padding-left:10px;"></td>
</tr>
<tr>
<td height="50px">供应商</td>
<td height="80px" style="text-align:left;padding-left:10px;"></td>
</tr>
<tr>
<td height="50px">物资公司</td>
<td height="80px"></td>
</tr>
<tr>
<td height="50px">项目管理部门</td>
<td height="80px" style="text-align:left;padding-left:10px;"></td>
</tr>
<tr>
<td height="50px">物资部</td>
<td height="80px" style="text-align:left;padding-left:10px;"></td>
</tr>
<tr>
<td height="50px">财务部</td>
<td height="80px" style="text-align:left;padding-left:10px;"></td>
</tr>
</tbody>
<tfoot style="display:table-footer-group;">
<tr>
<td style="height: 0px;padding: 0px;border: none;border-bottom: solid 1px #000000;" colspan="2"></td>
</tr>
</tfoot>
</table>
<p>注:1.涉及技术的违约事实,由项目管理部门确认;涉及商务的违约事实,由物资公司/供应中心确认;技术、商务均涉及的,由项目管理部门,由物资公司/供应中心确认。各个单位可根据实际情况增加其他部门(单位)确认。
</p>
</div>
</div>
</div>
</body>
</html>
调用主函数生成
import com.sgcc.cn.utils.PdfHelper;
import java.io.File;
import java.io.FileOutputStream;
import java.util.HashMap;
import java.util.Map;
public class test {
public static void main(String[] args) {
try {
PdfHelper pdfHelper = new PdfHelper();
Map<String,Object> map = new HashMap<>();
map.put("name","唯有碎银解千愁");
FileOutputStream out = new FileOutputStream(new File( "D:\\1.pdf"));
pdfHelper.createPDF(map,out,"gererate.ftl");
} catch (Exception e) {
e.printStackTrace();
}
}
}
电子化模版嵌套表格
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="UTF-8" />
<title>调配申请单</title>
<style type="text/css">
body{width:100%;}
@media screen and (max-width: 768px) {
body{font-size: 14px;}
table{table-layout: fixed;} }
p{line-height: 26px;margin-right:15px;}
table td p{line-height:6px;margin-right:0;padding-right:0;padding-left:0;}
span{margin:0;padding:0;}
</style>
<style type="text/css" mcs_bogus="1">
@page {
size: a4 landscape;/*210*297*/
/*size:195mm 271mm;*/
margin: 8mm 8mm;
padding: 0;
/*border:solid #F00 1px;*/
background-image:url(images/water.gif);
background-repeat:no-repeat;
background-position:center;
@top-left {
content: element(header);
}
@bottom-left {
content: element(footer);
}
@bottom-center {
content: "--- " counter(page) " ---" counter(main-heading);
}
@bottom-right {
content: "";
}
}
@page blank {
size: a4 portrait;
/*size:195mm 271mm;*/
margin: 10mm 10mm;
padding: 0;
@top-left {
content: normal
}
@bottom-left {
content: normal
}
@top-right {
content: normal
}
@bottom-right {
content: normal
}
@bottom-center {
content: normal
}
}
#pagenumber:before {
content: counter(page);
}
#pagecount:before {
content: counter(pages);
}
/* Used for generating Table of content */
#toc a::after {
content: leader('.') target-counter(attr(href), page);
}
/* Use this class for
first level titles */
.page_break_before {
page-break-before: always;
}
/* Use this class for forcing page break inside pdf */
.page_breaker {
page-break-after: always;
}
.blank {
page : blank;
}
.version {
page: version;
}
@page :[counter(page)=3] {
margin-top:0;
margin-right:0;
@bottom-center {
content: "第N页";
font-family:SimSun,'宋体';
font-size:10px;
}
}
@page version {
@bottom-left {
content: "version";
margin: 0;
padding: 0;
font-size: 8pt;
font-style:italic;
font-family:SimSun,'宋体';
}
}
/* footnote */
.notebox {
page: notebox;
}
@page notebox {
page-break-after: auto;
}
@media print {
.notebox {
position: relative;
}
.notebox .content {
width: 100%;
margin-bottom: 0px;
}
.notebox .footnote {
position: absolute;
top: 265mm;
left: 0;
z-index: 100;
border-top: 1pt solid #000;
width: 100%;
font-size: 8.76pt;
}
}
body {
line-height: 100%;
font-family:SimSun,'宋体';
/*width:178mm;*/
margin: 0;
}
.page {
/*size:195mm 271mm;*/
height: 100mm;
/*height:246mm; 16K*/
border: 0px;
}
.font {
font-size: 10px;
line-height: 20px;
}
.xhx {
border-bottom:solid 1px #000000;
}
td{
border-top:solid 1px #000000;
border-bottom:solid 0px #000000;
border-left:solid 1px #000000;
border-right:solid 0px #000000;
display:inline-black;
padding:6px 0px 6px 0px;
margin:0px;
}
tr td:last-child {
border-right:solid 1px #000000;
}
table { page-break-inside:auto; -fs-table-paginate:paginate;border-spacing: 0;border-bottom:solid 1px #000000;}
</style>
</head>
<body>
<div style="width:90%;margin:0 auto">
<div>
<h2 style="text-align: center;">调配申请单</h2>
<div class="Section1">
<div style="width:95%;overflow:hidden;text-align: right;">
<div>
编号:${receive.zdpsq}
</div>
</div>
<table cellspacing="0" cellpadding="0" style="width:100%;margin:0;text-align: center;" rules="all" border="0" frame="void">
<tbody>
<tr style="border-bottom: none">
<td width="10%" >申请单位</td>
<td width="18%" >${receive.zbutxt}</td>
<td width="18%" >申请日期</td>
<td width="18%" >${receive.createDate}</td>
<td width="18%" >调配类型</td>
<td width="18%" >市内调配/省内跨市调配</td>
</tr>
<tr>
<td rowspan="3" >需求<br/>描述</td>
<td colspan="2">调配方式</td>
<td>划转</td>
<td>拟调配地址</td>
<td>${receive.zdpdz}</td>
</tr>
<tr>
<td colspan="2">联系人</td>
<td>${receive.zxqflxr}</td>
<td>联系电话</td>
<td>${receive.zxqflxfs}</td>
</tr>
<tr>
<td colspan="5" style="padding:0px 0px 0px 0px;border:solid 0px #000000">
<table cellspacing="0" cellpadding="0" style="width:100%;margin:0;text-align: center;border-bottom:solid 0px #000000;" rules="all" border="0">
<thead style="display:table-header-group;">
<td>序号</td>
<td>物料编码</td>
<td>物料名称</td>
<td>规格型号</td>
<td>单位</td>
<td>需求数量</td>
<td>备注</td>
</thead>
<tbody>
<#list checkList as item>
<tr>
<td>${item_index+1}</td>
<td>${item.matnr}</td>
<td>${item.maktx}</td>
<td>${item.zggxh}</td>
<td>${item.meins}</td>
<td>${item.menge}</td>
<td>${item.remark}</td>
</tr>
</#list>
</tbody>
<tfoot style="display:table-footer-group;">
<tr>
<td style="height: 0px;padding: 0px;border: none;border-bottom: solid 0px #000000;" colspan="5"></td>
</tr>
</tfoot>
</table>
</td>
</tr>
<tr>
<td height="170px">市公司分管领导(签字)</td>
<td></td>
<td height="170px">市公司物资部/物资供应中心(签字、盖章)</td>
<td></td>
<td height="170px">市公司专业部门(签字、盖章)</td>
<td></td>
</tr>
<tr>
<td colspan="6">本调配单一式四份,省/地市物资部、省物资公司/县公司供应分中心、调入方和调出方各一份</td>
</tr>
</tbody>
</table >
</div>
</div>
</div>
</body>
</html>
如果不想把文件存在本地,想在生成之后返回流文件,代码如下
public byte[] createPDF(Map<String, Object> data, String templateName) throws Exception {
// 创建一个FreeMarker实例, 负责管理FreeMarker模板的Configuration实例
Configuration cfg = new Configuration(Configuration.DEFAULT_INCOMPATIBLE_IMPROVEMENTS);
// 指定FreeMarker模板文件的位置
ITextRenderer renderer = new ITextRenderer();
String simsun = System.getProperty("user.dir") + "/simsun.ttc";
String arialuni = System.getProperty("user.dir") + "/arialuni.ttf";
File fondFile = new File(simsun);
if (!fondFile.exists()) {
getFondPath();
}
// 设置 css中 的字体样式(暂时仅支持宋体和黑体)
renderer.getFontResolver().addFont(simsun, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
renderer.getFontResolver().addFont(arialuni, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
StringTemplateLoader stringLoader = new StringTemplateLoader();
String templateString = getFileData("templates/" + templateName);
stringLoader.putTemplate("myTemplate", templateString);
cfg.setTemplateLoader(stringLoader);
Template tpl = cfg.getTemplate("myTemplate", "utf-8");
StringWriter writer = new StringWriter();
// 把null转换成""
Map<String, Object> dataMap = CommunalTool.objectToMap(data);
// 将数据输出到html中
tpl.process(data, writer);
writer.flush();
String html = writer.toString();
// 把html代码传入渲染器中
renderer.setDocumentFromString(html);
ByteArrayOutputStream out = new ByteArrayOutputStream();
renderer.layout();
renderer.createPDF(out);
renderer.finishPDF();
byte[] fileByte = out.toByteArray();
out.flush();
out.close();
return fileByte;
}
在文件中添加图片,代码如下
在ftl文件中添加代码
<span>货物交接单号:</span>
<img src="${zhwjjdh}" style="height:50px;width:150px;" />
用java代码把图片转换成base64
/**
* 将图片转成base64 字符串
*
* @param path 文件路径
* @return
* @throws Exception
*/
public static String encodeBase64Picture(String path) throws Exception {
File file = new File(path);
FileInputStream inputFile = new FileInputStream(file);
byte[] buffer = new byte[(int) file.length()];
inputFile.read(buffer);
inputFile.close();
String result = new BASE64Encoder().encode(buffer);
if (StringUtils.isNotBlank(result)) {
result = "data:image/png;base64," + result;
} else {
result = null;
}
return result;
}
如果想要动态读取模版也可以
templateString 这个就是模版字符串,然后你可以写一个扩展方法去读取,如你想从数据库中存储和读取
String templateString = getFileData("templates/" + templateName);
stringLoader.putTemplate("myTemplate", templateString);
设置mysql数据库存储文件的字段为大字段类型blob
// 这里只提供一个公共方法,读取文件后返回一个字符串。
public String uploadModelSql(MultipartFile file) {
BufferedReader reader = null;
StringBuffer sbf = new StringBuffer();
try {
// Reader read = new InputStreamReader(file.getInputStream(), "UTF-8");
Reader read = new InputStreamReader(file.getInputStream(), "utf-8");
reader = new BufferedReader(read);
String tmpString = null;
//一行一行的读取文件里面的内容,这个是防止文件存储数据库之后,在读取模版布局问题
while ((tmpString = reader.readLine()) != null) {
sbf.append(tmpString).append("\r\n");
}
if (sbf == null) {
throw new RuntimeException("文件内容为空!");
}
return sbf.toString();
} catch (IOException e) {
e.printStackTrace();
return sbf.toString();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
}
模版下载
/**
* 下载模版文件
*
* @param response
* @param id
* @return
*/
@RequestMapping("/downLoad")
public void downLoadFile(HttpServletResponse response, @RequestParam String id) {
try {
//根据id查询数据库中的记录
SignatureTemplatesFile record = signatureTemplatesFileService.downLoadFile(id);
// 清空response
response.reset();
// 设置response的Header,record.getTemplateName() 文件名称
response.addHeader("Content-Disposition", "attachment;filename=" + new String(record.getTemplateName()));
// response.addHeader("Content-Length", "" + file.length());
OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
response.setContentType("application/octet-stream");
//大字段中的字符串,转换成byte数组
byte[] bytes = record.getTemplateFile().getBytes();
toClient.write(bytes);
toClient.flush();
toClient.close();
} catch (Exception e) {
e.printStackTrace();
}
}
总结
代码写的有点乱,总体来说该有的功能都有了,如:从jar中读取字体和ftl模版,如果你不想从jar中读取,可以自己改造一下,就是不管你是从其他地方读文件或者从数据库中字符串,总之你要把他转换成字符串,最后给(templateString)它就行。还有PDF生成的时候也可以返回流文件,你可以把返回的流文件,存储fastDFS(文件管理插件)上面去统一管理。