《SSD1 2.1-2课件》.ppt

* * * * * * * * * * * * * * *  For each step, we should Edit the servlet source file TravelRequest.java to include the code for that step. Compile the servlet source file using the javac command Run the servlet using the form in TravelRequestForm.html and the iCarnegie Servlet Workbench to see result. Coding a Servlet Example Step1: output the confirmation message including the dummy name Visitor Compile and Run Step2: The getParameter statement for obtaining the value of the radio button input control called Destination The out.println statements that output HTML code from the servlet. including the HTML code for the IMG tag whose src and alt attributes both specify the image file obtained earlier. Compile and Run Step3: Add the getParameter statement for obtaining the value of the text input control called Name Edit the out.println statement that outputs the greeting in the confirmation message to include the value obtained above instead of the dummy name Visitor. Compile and Run Testing and Evaluating the Servlet We do need to check that the response generated by our servlet is indeed as specified to us. We also need to make sure that the Web page constructed by the servlet is valid HTML. (WDG) Remember to follow the steps Define the problem you are attempting to solve. Make a plan on how you can do this. Code the solution as per your plan above. Evaluate your solution against the specification given to you. 2.1 Programming with Java Programming with Objects Java Program Development First Look at Java Element of a Java Servlet Planning Servlet Development Guidelines for Java Development 2.1.6 Guidelines for Java Development The process of Programming The Java API Documentation Coding Style Commenting Source Code Javadoc Developing Web pages Defining Web page content 定义网页内容 Planning the look of the page and the needed links 规划网页的布局和所需的链接 Implementing the Web page by writing it incrementally in small steps 一步步实现网页内容 Evaluating the Web page in