Java Servlet and JSP Cookbook

With literally hundreds of examples and thousands of lines of code, the Java Servlet and JSP Cookbook yields tips and techniques that any Java web developer who uses JavaServer Pages or servlets will use every day, along with full-fledged solutions to significant web application development problems that developers can insert directly into their own applications. Java Servlet and JSP Cookbook presents real-world problems, and provides concise, practical solutions to each. Finding even one tested code "recipe" that solves a gnarly problem in this comprehensive collection of solutions and best practices will save hours of frustration--easily justifying the cost of this invaluable book. But "Java Servlet and JSP Cookbook" is more than just a wealth of cut-and-paste code. It also offers clear explanations of how and why the code works, warns of potential pitfalls, and directs you to sources of additional information, so you can learn to adapt the problem-solving techniques to similar situations. These recipes include vital topics like the use of Ant to setup a build environment, extensive coverage of the WAR file format and web.xml deployment descriptor, file-uploading, error-handling, cookies, logging, dealing with non-HTML content, multimedia, request filtering, web services, I18N, web services, and a host of other topics that frustrate even the most seasoned developers. For Java web developers of all levels who are eager to put into practice the theory presented in other API-focused books, the solutions presented in this practical book will prove invaluable over and over again. This is painless way for less experienced developers who prefer to learn by doing to expand their skills and productivity, while accomplishing practical solutions to the pressing problems they face every day. More experienced developers can use these recipes to solve time-consuming problems quickly, freeing up their time for the more creative aspects of their work.

Preface; What's in the Book; Audience; Organization; Conventions Used in This Book; Using Code Examples; Comments and Questions; Acknowledgments; Chapter 1: Writing Servlets and JSPs; 1.1 Introduction; 1.1 Writing a Servlet; 1.2 Writing a JSP; 1.3 Compiling a Servlet; 1.4 Packaging Servlets and JSPs; 1.5 Creating the Deployment Descriptor; Chapter 2: Deploying Servlets and JSPs; 2.1 Introduction; 2.1 Deploying an Individual Servlet on Tomcat; 2.2 Using a Context Element in Tomcat'sserver.xml; 2.3 Deploying an Individual Servlet on WebLogic; 2.4 Deploying an Individual JSP on Tomcat; 2.5 Deploying an Individual JSP on WebLogic; 2.6 Deploying a Web Application on Tomcat; 2.7 Deploying a Web Application on WebLogic Using Ant; 2.8 Using the WebLogic Administration Console; 2.9 Using WebLogic Builder to Deploy a Web Application; 2.10 Using the weblogic.DeployerCommand-Line Tool; Chapter 3: Naming Your Servlets; 3.1 Introduction; 3.1 Mapping a Servlet to a Name in web.xml; 3.2 Creating More Than One Mapping to a Servlet; 3.3 Creating a JSP-Type URL for a Servlet; 3.4 Mapping Static Content to a Servlet; 3.5 Invoking a Servlet Without a web.xml Mapping; 3.6 Mapping All Requests Within a Web Application to a Servlet; 3.7 Mapping Requests to a Controller and Preserving Servlet Mappings; 3.8 Creating Welcome Files for a Web Application; 3.9 Restricting Requests for Certain Servlets; 3.10 Giving Only the Controller Access to Certain Servlets; Chapter 4: Using Apache Ant; 4.1 Introduction; 4.1 Obtaining and Setting Up Ant; 4.2 Using Ant Targets; 4.3 Including Tomcat JAR files in the Build File Classpath; 4.4 Compiling a Servlet with an Ant Build File; 4.5 Creating a WAR File with Ant; 4.6 Creating a JAR File with Ant; 4.7 Starting a Tomcat Application with Ant; 4.8 Stopping a Tomcat Application with Ant; Chapter 5: Altering the Format of JSPs; 5.1 Introduction; 5.1 Precompiling a JSP in Tomcat; 5.2 Precompiling a JSP in WebLogic; 5.3 Precompiling JSPs with the Precompilation Protocol; 5.4 Mapping a JSP to Its Page Implementation Class; 5.5 Creating a JSP from Scratch as a JSP Document; 5.6 Generating an XML View from a JSP; Chapter 6: Dynamically Including Content in Servlets and JSPs; 6.1 Introduction; 6.1 Including a Resource Each Time a Servlet Handles a Request; 6.2 Using an External Configuration to Include a Resource in a Servlet; 6.3 Including Resources Nested at Multiple Levels in a Servlet; 6.4 Including a Resource that Seldom Changes into a JSP; 6.5 Including Content in a JSP Each Time the JSP Handles a Request; 6.6 Using an External Configuration File to Include a Resource in a JSP; 6.7 Including an XML Fragment in a JSP Document; 6.8 Including Content from Outside a Context in a JSP; Chapter 7: Handling Web Form Data in Servlets and JSPs; 7.1 Introduction; 7.1 Handling a POST HTTP Request in a Servlet; 7.2 Handling a POST HTTP Request in a JSP; 7.3 Setting the Properties of a JavaBean in a JSP; 7.4 Setting a Scoped Attribute in a JSP to the Value of a Form Parameter; 7.5 Posting Data from a Servlet; 7.6 Posting Data from a JSP; 7.7 Using a Servlet to Add a Parameter to a Query String; 7.8 Using a JSP to Add a Parameter to a Query String; 7.9 Using a Filter to Read Parameter Values; Chapter 8: Uploading Files; 8.1 Introduction; 8.1 Preparing the HTML Page for File Uploads; 8.2 Using the com.oreilly.servlet Library; 8.3 Uploading One File at a Time; 8.4 Uploading Multiple Files; 8.5 Renaming Files; 8.6 Using a JSP to Handle a File Upload; Chapter 9: Handling Exceptions in Web Applications; 9.1 Introduction; 9.1 Declaring Exception Handlers in web.xml; 9.2 Creating an Exception-Handling Servlet; 9.3 Sending an Error from a Servlet; 9.4 Sending an Error from a JSP; 9.5 Creating an Error-Handling JSP; 9.6 Declaring a Special Exception-Handling JSP for Other JSPs; Chapter 10: Reading and Setting Cookies; 10.1 Introduction; 10.1 Setting a Cookie with a Servlet; 10.2 Creating an Array from All of the Request's Cookies; 10.3 Setting a Cookie with a JSP; 10.4 Reading Cookie Values with a Servlet; 10.5 Reading Cookie Values with a JSP; 10.6 Altering or Removing a Cookie That Has Already Been Set; Chapter 11: Session Tracking; 11.1 Introduction; 11.1 Setting the Session Timeout in web.xml; 11.2 Setting the Session Timeout in All Tomcat Web Applications; 11.3 Setting the Session Timeout Programmatically; 11.4 Checking if a Session Exists in an HttpServletRequest; 11.5 Tracking Session Activity in Servlets; 11.6 Tracking Session Activity in JSPs; 11.7 Using URL Rewriting in a JSP; 11.8 Using URL Rewriting in a Servlet; 11.9 Using a Listener to Track the Session Lifecycle; 11.10 Using a Listener to Monitor Session Attributes; 11.11 Using a Filter to Monitor Session Attributes; Chapter 12: Integrating JavaScript with Servlets and JSPs; 12.1 Introduction; 12.1 Including JavaScript Modules in a Servlet; 12.2 Including JavaScript Modules in a JSP; 12.3 Creating a New Window with JavaScript in a Servlet; 12.4 Creating a New Window with JavaScript in a JSP; 12.5 Using JavaScript to Validate Form Values in a Servlet; 12.6 Using JavaScript to Validate Form Values in a JSP; Chapter 13: Sending Non-HTML Content; 13.1 Introduction; 13.1 Sending a PDF File; 13.2 Sending a Word Processing File; 13.3 Sending an XML file; 13.4 Sending an Audio File; 13.5 Viewing Internal Resources in a Servlet; Chapter 14: Logging Messages from Servlets and JSPs; 14.1 Introduction; 14.1 Logging Without Log4j; 14.2 Setting Up Log4j; 14.3 Using a Logger Without a Configuration File; 14.4 Adding an Appender to the Root Logger; 14.5 Using a Pattern with a Logger's Appender; 14.6 Using log4j in a JSP; 14.7 Logging Messages Using a Servlet Context Event Listener; 14.8 Logging Messages Using a Session Event Listener; Chapter 15: Authenticating Clients; 15.1 Introduction; 15.1 Creating Users and Passwords with Tomcat; 15.2 Setting Up SSL on Tomcat; 15.3 Using BASIC Authentication; 15.4 Using Form-Based Authentication; 15.5 Logging Out a User; 15.6 Using JAAS to Create a LoginModule; 15.7 Creating the JAAS Configuration File; 15.8 Using JAAS in a Servlet; 15.9 Using JAAS in a JSP; Chapter 16: Binding, Accessing, and Removing Attributes in Web Applications; 16.1 Introduction; 16.1 Setting ServletContext Attributes in Servlets; 16.2 Setting ServletContext Attributes in JSPs; 16.3 Accessing or Removing ServletContext Attributes in Servlets; 16.4 Accessing or Removing ServletContext Attributes in JSPs; 16.5 Setting Session Attributes in Servlets; 16.6 Setting Session Attributes in JSPs; 16.7 Accessing or Removing Session Attributes in Servlets; 16.8 Accessing or Removing Session Attributes in JSPs; 16.9 Setting Request Attributes in Servlets; 16.10 Setting Request Attributes in JSPs; 16.11 Accessing or Removing Request Attributes in Servlets; 16.12 Accessing or Removing Request Attributes in JSPs; Chapter 17: Embedding Multimedia in JSPs; 17.1 Introduction; 17.1 Embedding an Applet in a JSPUsing jsp:plugin; 17.2 Embedding an Applet in a JSP Using the HTML Converter; 17.3 Automatically Creating HTML Template for Including Flash Files; 17.4 Writing HTML Template to Embed a Flash File; 17.5 Embedding Flash in a Servlet; 17.6 Embedding a QuickTime Movie in a JSP; 17.7 Embedding an SVG File in a JSP; 17.8 Embedding a Background Soundtrack in a JSP; Chapter 18: Working With the Client Request; 18.1 Introduction; 18.1 Examining HTTP Request Headers in a Servlet; 18.2 Examining HTTP Request Headers in a JSP; 18.3 Using a Filter to Alter Request Headers; 18.4 Automatically Refreshing a Servlet; 18.5 Automatically Refreshing a JSP; 18.6 Counting the Number of Web Application Requests; Chapter 19: Filtering Requests and Responses; 19.1 Introduction; 19.1 Mapping a Filter to a Servlet; 19.2 Mapping a Filter to a JSP; 19.3 Mapping More Than One Filter to a Servlet; 19.4 Changing the Order in Which Filters are Applied to Servlets; 19.5 Configuring Initialization Parameters for a Filter; 19.6 Optionally Blocking a Request with a Filter; 19.7 Filtering the HTTP Response; 19.8 Using Filters with RequestDispatcher Objects; 19.9 Checking Form Parameters with a Filter; 19.10 Blocking IP Addresses with a Filter; Chapter 20: Managing Email in Servlets and JSPs; 20.1 Introduction; 20.1 Placing the Email-Related Classes on your Classpath; 20.2 Sending Email from a Servlet; 20.3 Sending Email from a Servlet Using a JavaBean; 20.4 Accessing Email from a Servlet; 20.5 Accessing Email from a Servlet Using a JavaBean; 20.6 Handling Attachments from an Email Received in a Servlet; 20.7 Adding Attachments to an Email in a Servlet; 20.8 Reading a Received Email's Headers from a Servlet; Chapter 21: Accessing Databases; 21.1 Introduction; 21.1 Accessing a Database from a Servlet Without DataSource; 21.2 Configuring a DataSource in Tomcat; 21.3 Using a DataSource in a Servlet with Tomcat; 21.4 Creating a DataSource on WebLogic; 21.5 Using a JNDI Lookup to get a DataSource from WebLogic; 21.6 Using a DataSource from WebLogic in a JSP; 21.7 Calling a Stored Procedure from a Servlet; 21.8 Calling a Stored Procedure from a JSP; 21.9 Converting a ResultSet to a Result Object; 21.10 Executing Several SQL Statements Within a Single Transaction; 21.11 Using Transactions with JSPs; 21.12 Finding Information about a ResultSet; Chapter 22: Using Custom Tag Libraries; 22.1 Introduction; 22.1 Creating a Classic Tag Handler; 22.2 Creating a JSP 1.2 TLD for a Classic Tag Handler; 22.3 Creating a JSP 2.0 TLD for a Classic Tag Handler; 22.4 Packaging a Tag Library in a Web Application; 22.5 Packaging the Tag Library in a JAR File; 22.6 Using the Custom Tag in a JSP; 22.7 Handling Exceptions in a Custom Tag Class; 22.8 Creating a Simple Tag Handler; 22.9 Creating a TLD for a Simple Tag Handler; 22.10 Using a Simple Tag Handler in a JSP; 22.11 Creating a JSP Tag File; 22.12 Packaging the JSP Tag File in a Web Application; 22.13 Packaging the JSP Tag File in a JAR; 22.14 Using a Custom Tag Associated with a Tag File; 22.15 Adding a Listener Class to a Tag Library; Chapter 23: Using the JSTL; 23.1 Introduction; 23.1 Downloading the JSTL 1.0 and Using the JSTL Tags in JSPs; 23.2 Downloading the Java Web Services Developer Pack; 23.3 Using the Core JSTL Tags; 23.4 Using the XML Core JSTL Tags; 23.5 Using the XML Transform Tags; 23.6 Using the Formatting JSTL Tags; 23.7 Using A SQL JSTL Tag with a DataSource Configuration; 23.8 Using A SQL JSTL Tag Without a DataSource Configuration; 23.9 Accessing Scoped Variables with the EL; 23.10 Accessing Request Parameters with the EL; 23.11 Using the EL to Access Request Headers; 23.12 Using the EL to Access One Request Header; 23.13 Accessing Cookies with the EL; 23.14 Using the EL to Access JavaBean Properties; 23.15 Using JSTL Functions; Chapter 24: Internationalization; 24.1 Introduction; 24.1 Detecting the Client Locale in a Servlet; 24.2 Detecting the Client's Locales in a JSP; 24.3 Creating a ResourceBundle as a Properties File; 24.4 Creating a ResourceBundle as a Java Class; 24.5 Using the ResourceBundle in a Servlet; 24.6 Using the ResourceBundle in a JSP; 24.7 Formatting Dates in a Servlet; 24.8 Formatting Dates in a JSP; 24.9 Formatting Currencies in a Servlet; 24.10 Formatting Currencies in a JSP; 24.11 Formatting Percentages in a Servlet; 24.12 Formatting Percentages in a JSP; 24.13 Setting the Localization Context in the Deployment Descriptor; Chapter 25: Using JNDI and Enterprise JavaBeans; 25.1 Introduction; 25.1 Configuring a JNDI Object in Tomcat; 25.2 Accessing the Tomcat JNDI Resource from a Servlet; 25.3 Accessing the Tomcat JNDI Resource from a JSP; 25.4 Configuring a JNDI Resource in WebLogic; 25.5 Viewing the JNDI Tree in WebLogic; 25.6 Accessing the WebLogic JNDI Resource from a Servlet; 25.7 Accessing the WebLogic JNDI Resource from a JSP; 25.8 Accessing an EJB Using the WebLogic JNDI Tree; Chapter 26: Harvesting Web Information; 26.1 Introduction; 26.1 Parsing an HTML Page Using thejavax.swing.text Subpackages; 26.2 Using a Servlet to Harvest Web Data; 26.3 Creating a JavaBean as a Web Page Parser; 26.4 Using the Web Page Parsing JavaBean in a Servlet; 26.5 Using the Web Page Parsing JavaBean in a JSP; Chapter 27: Using the Google and Amazon Web APIs; 27.1 Introduction; 27.1 Getting Set Up with Google's Web API; 27.2 Creating a JavaBean to Connect with Google; 27.3 Using a Servlet to Connect with Google; 27.4 Using a JSP to Connect with Google; 27.5 Getting Set Up with Amazon's Web Services API; 27.6 Creating a JavaBean to Connect with Amazon; 27.7 Using a Servlet to Connect with Amazon; 27.8 Using a JSP to Connect with Amazon; Colophon;|

• Preface
• Chapter 1: Writing Servlets and JSPs
• Chapter 2: Deploying Servlets and JSPs
• Chapter 3: Naming Your Servlets
• Chapter 4: Using Apache Ant
• Chapter 5: Altering the Format of JSPs
• Chapter 6: Dynamically Including Content in Servlets and JSPs
• Chapter 7: Handling Web Form Data in Servlets and JSPs
• Chapter 8: Uploading Files
• Chapter 9: Handling Exceptions in Web Applications
• Chapter 10: Reading and Setting Cookies
• Chapter 11: Session Tracking
• Chapter 12: Integrating JavaScript with Servlets and JSPs
• Chapter 13: Sending Non-HTML Content
• Chapter 14: Logging Messages from Servlets and JSPs
• Chapter 15: Authenticating Clients
• Chapter 16: Binding, Accessing, and Removing Attributes in Web Applications
• Chapter 17: Embedding Multimedia in JSPs
• Chapter 18: Working With the Client Request
• Chapter 19: Filtering Requests and Responses
• Chapter 20: Managing Email in Servlets and JSPs
• Chapter 21: Accessing Databases
• Chapter 22: Using Custom Tag Libraries
• Chapter 23: Using the JSTL
• Chapter 24: Internationalization
• Chapter 25: Using JNDI and Enterprise JavaBeans
• Chapter 26: Harvesting Web Information
• Chapter 27: Using the Google and Amazon Web APIs
• Colophon