servlet零配置，不晓得这个标题合适不

最新推荐文章于 2024-03-22 17:50:44 发布

最新推荐文章于 2024-03-22 17:50:44 发布 · 136 阅读

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本文介绍了一个简单的Servlet转发示例，通过定义一个处理转发请求的TtServlet类和一个实现IServlet接口的A类，展示了如何在Java Web应用中进行页面请求处理与转发。

写了一个简单的servlet转发，供大家参考下。
jsp页面：
<body>
<form id="form1" name="form1" method="post" action="servlet/com.test.A">
<input name="name" type="text" id="name" />
<input type="submit" name="Submit" value="提交" />
</form>
</body>
-----------------
servlet/com.test.A表示com.test.A负责处理页面的请求，
----------------------------------------------------

下面的类TtServlet 负责处理转发

package com.test;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class TtServlet extends HttpServlet {

public void init(ServletConfig arg0) throws ServletException {
super.init(arg0);
}

@Override
protected void doGet(HttpServletRequest arg0, HttpServletResponse arg1) throws ServletException, IOException {

this.service(arg0, arg1);
}

@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

try {
String clazz = request.getRequestURI();
String[] clazzs = clazz.split("/");
IServlet servlet = (IServlet)Class.forName(clazzs[clazzs.length-1]).newInstance();
servlet.service(request, response,this.getServletContext());
} catch (Exception e) {
e.printStackTrace();
}
}

private String getRequestURI(HttpServletRequest arg0) {
return arg0.getRequestURI();
}
}

--------------------------------------------------------
IServlet接口定义处理页面的需求，这个类里面可以用sendRedirect或者forward

package com.test;

import java.io.IOException;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public interface IServlet {
public void service(HttpServletRequest request, HttpServletResponse response,ServletContext sc) throws ServletException, IOException;
}

---------------------------------------
A类实现了IServlet接口，真正处理页面的请求

package com.test;

import java.io.IOException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class A implements IServlet{
private static final String CONTENT_TYPE= "text/html;charset=GB2312 ";

public void service(HttpServletRequest request, HttpServletResponse response,ServletContext sc) throws ServletException, IOException{
request.setCharacterEncoding("gbk");
response.setContentType(CONTENT_TYPE);
response.getWriter().write("com.test.A！");
RequestDispatcher rd = sc.getRequestDispatcher("/servlet/com.test.B");
System.out.println("BBBBBBBBBBBBBBBB");
rd.forward(request,response);
System.out.println("CCCCCCCCCCCCCCCCCCCCCCcc");
System.out.println("testB");

}

}

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以上的类可以实现jsp+javabean编程中解决jsp代码乱的问题