急！jsp 从servlet 传值到jsp页面显示？乱码
[code=Java][/code]package book.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.nio.charset.Charset;
import java.util.List;
import javax.jms.Session;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import book.dao.BaseDao;
import book.entity.Book;
public class BookServlet extends HttpServlet {
/**
* Constructor of the object.
*/
public BookServlet() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
PrintWriter out = response.getWriter();
BaseDao b=new BaseDao();
response.setContentType("text/html");
String action=request.getParameter("action");
if(action!=null&&action.equals("showAll")){
List<Book> list=b.listAll();
request.setAttribute("booklist", list);
RequestDispatcher rd=request.getRequestDispatcher("show.jsp");
rd.forward(request, response);
}
if(action!=null&&action.equals("del")){
String bookID=request.getParameter("bookID");
int ac=Integer.parseInt(bookID);
int row=b.delBook(ac);
List<Book> list=b.listAll();
request.setAttribute("booklist", list);
RequestDispatcher rd=request.getRequestDispatcher("show.jsp");
rd.forward(request, response);
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// doGet(request,response);
}
public void init() throws ServletException {
// Put your code here
}
}
上面是SERVLET代码
-------------------------------
下面是显示代码
-------------------
<%@ page language="java" pageEncoding="UTF-8"%>
<%@page import="java.util.*" %>
<%@page import="book.entity.Book" %>
<%
//request.setCharacterEncoding("gbk");
//new String(request.getParameterValues("checkbox1").getBytes("ISO-8859-1"),"UTF-8")
List<Book> blist=(List<Book>)request.getAttribute("booklist");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>show.jsp</title>
</head>
<body>
<table border="1" cellpadding="0" cellspacing="0"><caption>
图书信息
</caption>
<tr>
<td>图书编号</td>
<td>图书名字</td>
<td>图书价格</td>
<td>操作</td>
</tr>
<%for(Book book:blist){ %>
<tr>
<td><%=book.getBookID() %></td>
<td><%=book.getBookName() %></td>
<td><%=book.getBookPrice() %></td>
<td><a href="BookShow?action=del&bookID=<%=book.getBookID() %>">删除</a></td>
</tr>
<%} %>
</table>
速度
</body>
</html>
-------------------------
第一次查询显示的时候页面没乱码，等执行了删除然后再次显示的时候就显示？乱码了（同个显示页面的）
-------------------
我的过滤器
-----------------
package book.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class bookFilter implements Filter {
public void init(FilterConfig config) throws ServletException {
}
public void destroy() {
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain arg2) throws IOException, ServletException {
response.setContentType("html/text,charset=gb2312");
request.setCharacterEncoding("gb2312");
arg2.doFilter(request, response);
//request.setCharacterEncoding("gbk");
}
}
-----------加了过滤器还是不行，tomcat里也改过了！我的项目编码都是UTF-8的格式的，整页面的编码也改了！都是不行呢？我是菜鸟求高手帮忙解决下谢谢了
[解决办法]
你找个问题解决了没有？你的程序写错拉
PrintWriter out = response.getWriter();
BaseDao b=new BaseDao();
response.setContentType("text/html");
你先获得out了 再设置编码是没有用的
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
out对象获得放在设置编码后面
PrintWriter out = response.getWriter();