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国庆假期,闲来无事,翻翻Tomcat 7的书籍,顺便总结一下
Tomcat 7 支持嵌入的Web容器,在本地测试环境或者本地应用场景下比较有用,类似于Jetty的功能,可能是Tomcat觉得自己这个方面有所缺失,在Tomcat 7当中就增加了该功能
下载好Tomcat 7 Embedded版本:
里面包含这几个Jar包:
tomcat-embed-core.jar Tomcat核心类包,包含Tomcat Server的主要实现
tomcat-dbcp.jar Apache DBCP,用来在Tomcat实例中集成JDBC
tomcat-embed-jasper.jar Tomcat的JSP引擎
ecj-4.2.2.jar 来自Eclipse的JSP编译器,用来给Jasper引擎提供编译JSP文件使用
tomcat-embed-logging-juli.jar 集成JULI日志
tomcat-embed-logging-log4j.jar 集成Log4j日志
以测试一个Servlet为例:
import static org.junit.Assert.assertEquals;
import java.io.IOException;
import javax.servlet.ServletException;
import org.apache.catalina.Context;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.startup.Tomcat;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.xml.sax.SAXException;
public class TomcatServletTest {
private Tomcat tomcat;
@Before
public void startTomcat() throws ServletException, LifecycleException {
tomcat = new Tomcat();
tomcat.setPort(8080);
String tmpDirPath = System.getProperty("java.io.tmpdir");
Context ctxt = this.tomcat.addContext("/sqrt", tmpDirPath);
Tomcat.addServlet(ctxt, "servletTest", new ServletTest());
ctxt.addServletMapping("/", "servletTest");
this.tomcat.start();
}
@Test
public void testSuccess() throws IOException, SAXException {
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpGet httpget = new HttpGet("http://localhost:8080/sqrt/?number=49");
CloseableHttpResponse response = httpClient.execute(httpget);
try {
response = httpClient.execute(httpget);
HttpEntity entity = response.getEntity();
System.out.println(EntityUtils.toString(entity));
assertEquals("The result is 7.0", EntityUtils.toString(entity));
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
@After
public void stopTomcat() throws LifecycleException {
this.tomcat.stop();
}
}
import java.io.IOException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ServletTest extends HttpServlet {
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws IOException {
Double input = Double.parseDouble(request.getParameter("number"));
double result = Math.sqrt(input);
String message = "The result is " + result;
response.getOutputStream().write(message.getBytes());
}
}
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