关于cdp4j请参考Java操作Chrome浏览器的API库-cdp4j。因为html包含js影响页面展示，所以必须要使用html渲染，才能正常导出为pdf
1.下载cdp4j jar
新的cdp4j在maven中没有，所以我是先下载然后安装到本地仓库，再maven引用。
jar下载地址
https://github.com/webfolderio/cdp4j/releases/download/4.2.2/cdp4j-4.2.2.jar
https://github.com/webfolderio/cdp4j/releases/download/4.2.2/cdp4j-4.2.2-sources.jar
然后安装jar包到manve
另外要注意的是下载的jar依赖的包很多是没有打进来的，所以把项目的pom打开，然后把maven信息复制进来
2.pom配置
我是把源码中的有需要的pom的maven依赖都复制到自己项目了，能正常运行
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
</dependency>
<dependency>
<groupId>io.webfolder</groupId>
<artifactId>cdp</artifactId>
<version>4.2.2</version>
</dependency>
<dependency>
<groupId>io.webfolder</groupId>
<artifactId>cdp-sources</artifactId>
<version>4.2.2</version>
</dependency>
<dependency>
<groupId>com.vimeo.stag</groupId>
<artifactId>stag-library</artifactId>
<version>2.6.0</version>
<scope>provided</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.6</version>
</dependency>
<dependency>
<groupId>io.webfolder</groupId>
<artifactId>wf-exec</artifactId>
<version>1.0.3</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.neovisionaries</groupId>
<artifactId>nv-websocket-client</artifactId>
<version>2.9</version>
</dependency>
<dependency>
<groupId>org.asynchttpclient</groupId>
<artifactId>async-http-client</artifactId>
<version>2.10.1</version>
<scope>provided</scope>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.jvnet.winp</groupId>
<artifactId>winp</artifactId>
<version>1.28</version>
</dependency>
<dependency>
<groupId>org.java-websocket</groupId>
<artifactId>Java-WebSocket</artifactId>
<version>1.4.0</version>
<scope>provided</scope>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-websocket</artifactId>
<version>9.0.24</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.eclipse.jetty.websocket</groupId>
<artifactId>websocket-client</artifactId>
<version>9.4.20.v20190813</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>io.undertow</groupId>
<artifactId>undertow-core</artifactId>
<version>2.0.26.Final</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.glassfish.tyrus</groupId>
<artifactId>tyrus-container-grizzly-client</artifactId>
<version>1.15</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-websocket</artifactId>
<version>9.0.24</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-api</artifactId>
<version>9.0.24</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.graalvm.nativeimage</groupId>
<artifactId>svm</artifactId>
<version>19.3.0.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.java-websocket</groupId>
<artifactId>Java-WebSocket</artifactId>
<version>1.4.0</version>
<scope>provided</scope>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>io.github.kostaskougios</groupId>
<artifactId>cloning</artifactId>
<version>1.10.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.squareup</groupId>
<artifactId>javapoet</artifactId>
<version>1.11.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.forge.roaster</groupId>
<artifactId>roaster-jdt</artifactId>
<version>2.21.0.Final</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>io.vertx</groupId>
<artifactId>vertx-core</artifactId>
<version>4.0.0-milestone4</version>
<scope>provided</scope>
<exclusions>
<exclusion>
<groupId>io.netty</groupId>
<artifactId>netty-codec-http2</artifactId>
</exclusion>
<exclusion>
<groupId>io.netty</groupId>
<artifactId>netty-resolver-dns</artifactId>
</exclusion>
<exclusion>
<groupId>io.netty</groupId>
<artifactId>netty-codec-socks</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- https://mvnrepository.com/artifact/org.jsoup/jsoup -->
<dependency>
<groupId>org.jsoup</groupId>
<artifactId>jsoup</artifactId>
<version>1.10.1</version>
</dependency>
3.官方案例 导出网页html到pdf
public static void main(String[] args) throws IOException {
Path file = createTempFile("cdp4j", ".pdf");
Options options = Options.builder()
.headless(true)
.build();
Launcher launcher = new Launcher(options);
try (SessionFactory factory = launcher.launch()) {
String context = factory.createBrowserContext();
try (Session session = factory.create(context)) {
session.navigate("https://webfolder.io/cdp4j.html");
session.waitDocumentReady();
byte[] content = session.printToPDF();
write(file, content);
}
factory.disposeBrowserContext(context);
}
if (isDesktopSupported()) {
getDesktop().open(file.toFile());
}
launcher.kill();
}
4.我自己写的使用cdp4j导出html到pdf的工具类
@Slf4j
public class HTML2PDF {
public static int c=0;
public static Vector<PDFSessionDetail> sessionPool=new Vector();
public synchronized static PDFSessionDetail useSession(){
PDFSessionDetail returnSession=null;
if(!CollectionUtils.isEmpty(sessionPool))
for(PDFSessionDetail pdfSessionDetail:sessionPool){
if(!pdfSessionDetail.isHold()&&pdfSessionDetail.isActive()){
pdfSessionDetail.setHold(true);
pdfSessionDetail.setLastHoldDate(new Date());
pdfSessionDetail.setHoldTimes(pdfSessionDetail.getHoldTimes()+1);
returnSession=pdfSessionDetail;
break;
}
}
return returnSession;
}
public static void releaseSession(PDFSessionDetail pdfSessionDetail){
if(pdfSessionDetail!=null){
if(pdfSessionDetail.getHoldTimes()>100){
log.warn("切换session");
Session session=pdfSessionDetail.getSession();
session.close();
session=null;
pdfSessionDetail.setSession(null);
Session newSession=createSession(pdfSessionDetail.getSessionFactory(),pdfSessionDetail.getBrowserContext());
pdfSessionDetail.setSession(newSession);
pdfSessionDetail.setHoldTimes(0);
}
pdfSessionDetail.setHold(false);
}
}
public static Session createSession(SessionFactory factory ,String context){
return factory.create(context);
}
public static String createBrowserContext(SessionFactory factory){
return factory.createBrowserContext();
}
public static Launcher createLauncher(String tempPath){
File tempFile =new File(tempPath);
if(tempFile.exists()){
deleteDirectoryContent(tempFile);
};
Options options = Options.builder()
.headless(true)
.userDataDir(tempFile.toPath())
.build();
Launcher launcher = new Launcher(options);
return launcher;
}
public static SessionFactory createFactory(Launcher launcher){
return launcher.launch();
}
public static Result html2Pdf(Session session, String url, String path) {
FileOutputStream out=null;
IO io=null;
String stream=null;
try {
log.warn("开始访问");
session.navigate(url);
session.waitDocumentReady();
String html=session.getContent();
Document doc= Jsoup.parse(html);
String str=doc.body().text();
JSONObject errObject=null;
try {
if(str.contains("statusCode"))
errObject= JSON.parseObject(str);
} catch (Exception e) {
log.error(e.getMessage(),e);
}
if(errObject!=null&&errObject.containsKey("statusCode")){
return Result.failure(errObject.getString("statusCode"),errObject.getString("error"));
}else {
log.warn("完成文档渲染-开始打印PDF");
PrintToPDFResult result = session.getCommand().getPage().printToPDF(null, null,
true, null,
null, null,
null, null,
null, null,
null, null,
null, null,
null, ReturnAsStream);
io = session.getCommand().getIO();
stream = result.getStream();
out = new FileOutputStream(path);
boolean eof = false;
while (!eof) {
ReadResult streamResult = io.read(stream);
eof = streamResult.getEof();
if (streamResult.getBase64Encoded()) {
if (streamResult.getData() != null &&
!streamResult.getData().isEmpty()) {
byte[] content = getDecoder().decode(streamResult.getData());
out.write(content);
}
} else {
return Result.failure("-9","编码错误:Inavlid content encoding: it must be base64");
}
}
result = null;
return Result.sucess("0",null);
}
} catch (Throwable e) {
log.error(e.getMessage(),e);
return Result.failure("-10","未知错误："+e.getMessage());
} finally {
try {
out.flush();
out.close();
io.close(stream);
} catch (IOException e) {
log.error(e.getMessage(),e);
}
}
}
public static void deleteDirectoryContent(File file){
File[] list = file.listFiles();
for (File f:list){
if (f.isDirectory()){
deleteDirectoryContent(new File(f.getPath()));
}else{
f.delete();
}
}
file.delete();
};
}
