Java多线程+PDF生成实战（笔记）
多线程实战
- 新建项目
- 文件配置
- 资源配置教程
- 单线程版开发
- 多线程工作框架
- 源码：
- 问题
- 总结
新建项目
打开idea，新建一个moudle。
选择Spring Initializr，单击next，进入下一步。
接下来，安装Spring Boot套路设置项目名称和包名。
单击next。
再单击next。
单击finish完成工程的创建。工程目录结构为：
文件配置
修改pom.xml，添加pdf和Spring等相关依赖
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.2.5.RELEASEversion>
<relativePath/>
parent>
<groupId>com.njustgroupId>
<artifactId>pdfmutithreadartifactId>
<version>0.0.1-SNAPSHOTversion>
<name>pdfmutithreadname>
<description>Demo project for Spring Bootdescription>
<properties>
<java.version>1.8java.version>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-freemarkerartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
<version>RELEASEversion>
<scope>compilescope>
dependency>
<dependency>
<groupId>com.itextpdfgroupId>
<artifactId>itextpdfartifactId>
<version>5.5.13version>
dependency>
<dependency>
<groupId>com.itextpdf.toolgroupId>
<artifactId>xmlworkerartifactId>
<version>5.5.13version>
dependency>
<dependency>
<groupId>commons-iogroupId>
<artifactId>commons-ioartifactId>
<version>2.5version>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
plugin>
<plugin>
<artifactId>maven-compiler-pluginartifactId>
<configuration>
<source>${java.version}source>
<target>${java.version}target>
configuration>
plugin>
plugins>
build>
project>
资源配置教程
首先完成资源文件的创建和配置，新建如下文件。
freemarker.ftl,这里的模板为了后面和多线程版本测试做对比，将PDF设置的比较大，由于数据比较简单。暂时使用数量模拟现实中的质量。说白了就是模拟一段耗时操作。
<html lang="en">
<head>
<meta charset="UTF-8"/>
<title>Titletitle>
<style>
body {
font-family: SimHei;
}
.pos {
position: absolute;
left: 100px;
top: 150px
}
style>
head>
<body>
<div class="blue pos">
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">水调歌头·明月几时有h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">宋代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">苏轼a>p>
<div class="contson" id="contson632c5beb84eb">
<p>丙辰中秋，欢饮达旦，大醉，作此篇，兼怀子由。p>
<p>明月几时有？把酒问青天。不知天上宫阙，今夕是何年。我欲乘风归去，又恐琼楼玉宇，高处不胜寒。起舞弄清影，何似在人间。p>
div>
<h1 style="font-size:20px; line-height:22px; height:22px; margin-bottom:10px;">清平乐·别来春半h1>
<p class="source"><a href="https://blog.csdn.net/qq_32510597/article/details/105060870">五代a><span>：span><a
href="https://blog.csdn.net/qq_32510597/article/details/105054876">李煜a>p>
<div class="contson" id="contson632c5beb84eb">
别来春半，触目柔肠断。砌下落梅如雪乱，拂了一身还满。(柔肠断 一作：愁肠断) 雁来音信无凭，路遥归梦难成。离恨恰如春草，更行更远还生。
div>