大家好,本人是JAVA 初学者,有些基础问题想请教大家。
在java servlet programming 2nd edition中
提到import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;public class HelloWorld extends HttpServlet { public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException { res.setContentType("text/html");
PrintWriter out = res.getWriter(); out.println("<HTML>");
out.println("<HEAD><TITLE>Hello World</TITLE></HEAD>");
out.println("<BODY>");
out.println("<BIG>Hello World</BIG>");
out.println("</BODY></HTML>");
}
}getWriter( )方法返回一个PrintWriter,用于响应字节型数据的输出public PrintWriter ServletResponse.getWriter() throws IOException
public ServletOutputStream ServletResponse.getOutputStream() throws IOException请问:上面这两条声明代表什么意思,应该怎样理解啊?
JAVA有这种方法的声明方式?还有为什么我在eclipse中的JAR包javax.servlet中找到了ServletResponse类,但是却无法显示?
Source not found
在java servlet programming 2nd edition中
提到import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;public class HelloWorld extends HttpServlet { public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException { res.setContentType("text/html");
PrintWriter out = res.getWriter(); out.println("<HTML>");
out.println("<HEAD><TITLE>Hello World</TITLE></HEAD>");
out.println("<BODY>");
out.println("<BIG>Hello World</BIG>");
out.println("</BODY></HTML>");
}
}getWriter( )方法返回一个PrintWriter,用于响应字节型数据的输出public PrintWriter ServletResponse.getWriter() throws IOException
public ServletOutputStream ServletResponse.getOutputStream() throws IOException请问:上面这两条声明代表什么意思,应该怎样理解啊?
JAVA有这种方法的声明方式?还有为什么我在eclipse中的JAR包javax.servlet中找到了ServletResponse类,但是却无法显示?
Source not found
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