通过Java代码启动Jetty【programmatically start a jetty server】
通过Java代码启动Jetty的方式有以下几种：【第一种】在java代码中通过标准的jetty.xml配置文件启动，示例代码如下：
EmbeddedViaXml.java
////////////////////////////////begin/////////////////////////////////
package jetty;
import java.io.File;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.xml.XmlConfiguration;
public class EmbeddedViaXml
{
public static void main(String[] args)
{
try
{
// The configuration files
List<URL> configs = new ArrayList<>();
configs.add(new File("jetty.xml").toURI().toURL());
configs.add(new File("jetty-plus.xml").toURI().toURL());
// The properties
Map<String, String> props = new HashMap<String, String>();
props.put("jetty.home",new File(System.getProperty("user.dir")).getCanonicalPath());
Server server = load(configs,props);
server.start();
server.join();
}
catch (Throwable t)
{
t.printStackTrace();
}
}
public static Server load(List<URL> xmlConfigUrls, Map<String, String> props) throws Exception
{
XmlConfiguration last = null;
// Hold list of configured objects
Object[] obj = new Object;
// Configure everything
for (int i = 0; i < xmlConfigUrls.size(); i++)
{
URL configURL = xmlConfigUrls.get(i);
XmlConfiguration configuration = new XmlConfiguration(configURL);
if (last != null)
{
// Let configuration know about prior configured objects
configuration.getIdMap().putAll(last.getIdMap());
}
configuration.getProperties().putAll(props);
obj = configuration.configure();
last = configuration;
}
// Find Server Instance.
Server foundServer = null;
int serverCount = 0;
for (int i = 0; i < xmlConfigUrls.size(); i++)
{
if (obj instanceof Server)
{
if (obj.equals(foundServer))
{
// Identical server instance found
continue; // Skip
}
foundServer = (Server)obj;
serverCount++;
}
}
if (serverCount <= 0)
{
throw new IllegalStateException("Load failed to configure a " + Server.class.getName());
}
if (serverCount == 1)
{
return foundServer;
}
throw new IllegalStateException(String.format("Configured %d Servers, expected 1",serverCount));
}
}
////////////////////////////////end///////////////////////////////////
【第二种】在java代码中通过spring bean格式的jetty.xml配置文件启动，示例代码如下：
//////////////////////////////////begin///////////////////////
public static final String DEFAULT_CONFIG_URI_FOR_JETTY = "xbean:jetty.xml";
configURI4Jetty = new URI(DEFAULT_CONFIG_URI_FOR_JETTY);
if (configURI4Jetty != null) {
System.out.println("Loading jetty server from: "
+ configURI4Jetty);
ApplicationContext context = createApplicationContext(configURI4Jetty);
server = (Server) context.getBean("Server");
server.start();
server.join();
}
protected ApplicationContext createApplicationContext(URI config)
throws MalformedURLException, URISyntaxException {
String uri = config.getSchemeSpecificPart();
if (uri.lastIndexOf('?') != -1) {
IntrospectionSupport
.setProperties(this, URISupport.parseQuery(uri));
uri = uri.substring(0, uri.lastIndexOf('?'));
}
Resource resource = Utils.resourceFromString(uri);
try {
return new ResourceXmlApplicationContext(resource) {
@Override
protected void initBeanDefinitionReader(
XmlBeanDefinitionReader reader) {
reader.setValidating(isValidate());
}
};
} catch (FatalBeanException errorToLog) {
throw errorToLog;
}
}
public static Resource resourceFromString(String uri) throws MalformedURLException {
Resource resource;
File file = new File(uri);
if (file.exists()) {
resource = new FileSystemResource(uri);
} else if (ResourceUtils.isUrl(uri)) {
try {
resource = new UrlResource(ResourceUtils.getURL(uri));
} catch (FileNotFoundException e) {
MalformedURLException malformedURLException = new MalformedURLException(uri);
malformedURLException.initCause(e);
throwmalformedURLException;
}
} else {
resource = new ClassPathResource(uri);
}
return resource;
}
//////////////////////////////////end/////////////////////////
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