Java Code Examples for javax.servlet.ServletResponse#setCharacterEncoding()

protected void redirectToLogin(ServletRequest request, ServletResponse response) throws IOException {  	
	if (isAjaxRequest((HttpServletRequest)request)) {
		response.setCharacterEncoding( Constants.BASE_ENCODING );
		response.setContentType("application/json");
		response.getWriter().write(Constants.NO_LOGIN_JSON_DATA);
		return;
	}
	if (this.isIframeMode((HttpServletRequest)request)) { // iframe 不要導向 login.action 因為畫面會怪怪的    		
		WebUtils.issueRedirect(request, response, "/pages/system/error_static.jsp");
		return;
	}    	
	if (this.isDojoxContentPane((HttpServletRequest)request)) { // 在 dojox.layout.ContentPane 不要出現 login.action 頁面    		
		WebUtils.issueRedirect(request, response, Constants.DOJOX_CONTENT_PANE_XHR_RE_LOGIN_PAGE);
		return;
	}
	WebUtils.issueRedirect(request, response, getLoginUrl());
}
 

/**
 * description 封装response  统一json返回
 *
 * @param content 内容
 * @param response response
 */
public static void responseWrite(ResponseEntity content, ServletResponse response) {
    response.setCharacterEncoding("UTF-8");
    response.setContentType("application/json;charset=utf-8");
    ((HttpServletResponse)response).setStatus(content.getStatusCodeValue());
    content.getHeaders().forEach((key, value) ->
            ((HttpServletResponse) response).addHeader(key, value.get(0)));
    try (PrintWriter printWriter = response.getWriter()) {
        if (content.getBody() != null) {
            if (content.getBody() instanceof String) {
                printWriter.write(content.getBody().toString());
            } else {
                ObjectMapper objectMapper = new ObjectMapper();
                printWriter.write(objectMapper.writeValueAsString(content.getBody()));
            }
        } else {
            printWriter.flush();
        }
    } catch (IOException e) {
        logger.error("responseWrite response error: ", e);
    }
}
 

@Override
public void doFilter(ServletRequest req, ServletResponse resp,
		FilterChain chain) throws IOException, ServletException {
	/**
	 * 设置页面编码
	 */
	HttpServletRequest request = (HttpServletRequest) req;
	HttpServletResponse response = (HttpServletResponse) resp;
	req.setCharacterEncoding("utf-8");
	resp.setCharacterEncoding("utf-8");
	
	/**
	 * 清除页面缓存
	 */
	response.setHeader("Pragma", "No-cache");
	response.setHeader("Cache-Control", "no-cache");
	response.setDateHeader("Expires", -10);
	chain.doFilter(req, resp);

}
 

private void authFailure(ServletResponse servletResponse) throws IOException {
	servletResponse.setCharacterEncoding("UTF-8");
	servletResponse.setContentType("application/json; charset=utf-8");
	
	HttpServletResponse response = (HttpServletResponse) servletResponse;
	response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
	response.setContentType("application/json; charset=utf-8");
	
	PrintWriter out = response.getWriter();												
	
	OpenCPSErrorDetails error = new OpenCPSErrorDetails(new Date(), "permission denied", "");
	
	out.println(error.toString());
	out.flush();
	out.close();
}
 

/**
 * Select and set (if specified) the character encoding to be used to
 * interpret request parameters for this request.
 *
 * @param request The servlet request we are processing
 * @param response The servlet response we are creating
 * @param chain The filter chain we are processing
 *
 * @exception IOException if an input/output error occurs
 * @exception ServletException if a servlet error occurs
 */
public void doFilter(ServletRequest request, ServletResponse response,
                     FilterChain chain)
       throws IOException, ServletException {

    // Conditionally select and set the character encoding to be used
    if ((request.getCharacterEncoding() == null)) {
        String encodingIn = selectEncoding(request);
        if (encoding != null) {
            request.setCharacterEncoding(encodingIn);
            response.setContentType("text/html; charset=" + encodingIn);
            response.setCharacterEncoding(encodingIn);
        }
    }

    // Pass control on to the next filter
    chain.doFilter(request, response);

}
 

/**
 * Select and set (if specified) the character encoding to be used to
 * interpret request parameters for this request.
 *
 * @param request The servlet request we are processing
 * @param response The servlet response we are creating
 * @param chain The filter chain we are processing
 *
 * @exception IOException if an input/output error occurs
 * @exception ServletException if a servlet error occurs
 */
public void doFilter(ServletRequest request, ServletResponse response,
                     FilterChain chain)
       throws IOException, ServletException {

    // Conditionally select and set the character encoding to be used
    if ((request.getCharacterEncoding() == null)) {
        String encodingIn = selectEncoding(request);
        if (encoding != null) {
            request.setCharacterEncoding(encodingIn);
            response.setContentType("text/html; charset=" + encodingIn);
            response.setCharacterEncoding(encodingIn);
        }
    }

    // Pass control on to the next filter
    chain.doFilter(request, response);

}
 

/**
 * 输出JSON
 */
public static void writeJson(Object object, ServletResponse response) {
    PrintWriter out = null;
    try {
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/json; charset=utf-8");
        out = response.getWriter();
        out.write(JSONUtil.toJsonStr(object));
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (out != null) {
            out.close();
        }
    }
}
 

/**
 * 主要是处理登入失败的方法
 */
@Override
protected boolean onLoginFailure(AuthenticationToken token,
		AuthenticationException e, ServletRequest request,
		ServletResponse response) {
	setFailureAttribute(request, e);
	if (!"XMLHttpRequest".equalsIgnoreCase(((HttpServletRequest) request)
			.getHeader("X-Requested-With"))) {// 不是ajax请求
		return true;
	}
	try {
		response.setCharacterEncoding("UTF-8");
		PrintWriter out = response.getWriter();
		out.printf("{success:false,message:'%s'}",
				request.getAttribute(getFailureKeyAttribute()));
		out.flush();
		out.close();
	} catch (IOException e1) {
		log.fatal("异步跳转异常", e);
	}
	return false;
}
 

public void doFilter(ServletRequest request, ServletResponse response,
		FilterChain chain) throws IOException, ServletException {
     HttpServletRequest req=(HttpServletRequest)request;    
     String  flag=req.getParameter("flag");
     if(((HttpServletRequest)request).getRequestURI().equals("/TLX/admin/adminLogin.jsp")||!((HttpServletRequest)request).getRequestURI().endsWith(".jsp")){
    	 chain.doFilter(request, response);
     }else{
    	 if(!"adminLogin".equals(flag)){
	    	 
	    	 HttpServletRequest httpServletRequest = (HttpServletRequest)request;
				HttpSession httpSession = httpServletRequest.getSession();
			    String account=(String)httpSession.getAttribute("account");
			    response.setCharacterEncoding("GBK");
			
				if(account == null){
					response.setCharacterEncoding("GBK");
					((HttpServletResponse)response).getWriter().write("<script>alert('����δ��¼�����ȵ�¼��ϵͳ���Զ���ת����¼ҳ��');window.top.location.href='" + ((HttpServletRequest)request).getContextPath() + "/admin/adminLogin.jsp';</script>");
				}else{
					chain.doFilter(request, response);
				}
	     }else{
	    		chain.doFilter(request, response);
	    	 
	     }
     }
     

}
 

protected void redirectToLogin(ServletRequest request, ServletResponse response) throws IOException {
	if (isAjaxRequest((HttpServletRequest)request)) {
		response.setCharacterEncoding("UTF-8");
		response.setContentType("application/json");
		response.getWriter().write(Constants.NO_LOGIN_JSON_DATA);
		return;
	}
	if (this.isDojoxContentPane((HttpServletRequest)request)) { // 在 dojox.layout.ContentPane 不要出現 login.action 頁面    		
		WebUtils.issueRedirect(request, response, Constants.DOJOX_CONTENT_PANE_XHR_RE_LOGIN_PAGE);
		return;
	}
	WebUtils.issueRedirect(request, response, getLoginUrl());
}
 

protected void redirectToLogin(ServletRequest request, ServletResponse response) throws IOException {
 	if ( !Constants.getSystem().equals( Constants.getMainSystem() ) && !isAjaxRequest((HttpServletRequest)request) ) { // 非 core-web
 		try {
	if ( this.loginUseCurrentCookieForGeneralPackage(request, response) ) { // no need to login-page
		String url = SimpleUtils.getHttpRequestUrl( (HttpServletRequest)request );
		logger.warn("URL = " + url );					
		WebUtils.issueRedirect(request, response, url);
		return;
	}
} catch (Exception e) {
	e.printStackTrace();
}
 	}    	
 	if (isAjaxRequest((HttpServletRequest)request)) {
 		response.setCharacterEncoding( Constants.BASE_ENCODING );
 		response.setContentType("application/json");
 		response.getWriter().write(Constants.NO_LOGIN_JSON_DATA);
 		return;
 	}
 	if (this.isIframeMode((HttpServletRequest)request)) { // iframe 不要導向 login.action 因為畫面會怪怪的    		
 		WebUtils.issueRedirect(request, response, "/pages/system/error_static.jsp");
 		return;
 	}    	
 	if (this.isDojoxContentPane((HttpServletRequest)request)) { // 在 dojox.layout.ContentPane 不要出現 login.action 頁面    		
 		WebUtils.issueRedirect(request, response, Constants.DOJOX_CONTENT_PANE_XHR_RE_LOGIN_PAGE);
 		return;
 	}
 	WebUtils.issueRedirect(request, response, getLoginUrl());
 }
 

@Override
protected boolean onAccessDenied(ServletRequest request, ServletResponse response) throws Exception {
    response.setCharacterEncoding("UTF-8");
    response.setContentType("application/json; charset=UTF-8");
    PrintWriter out = response.getWriter();
    out.write(JSON.toJSONString(MyResponse.createResponse(ResponseEnum.NON_AUTH)));
    return false;
}
 

@Override
protected boolean onLoginSuccess(AuthenticationToken token, Subject subject, 
		ServletRequest request, ServletResponse response) throws Exception {
	
       HttpServletRequest httpServletRequest = (HttpServletRequest)request;
       HttpServletResponse httpServletResponse = (HttpServletResponse)response;
       if (!this.isAjaxRequest(httpServletRequest)) {
       	httpServletResponse.sendRedirect(httpServletRequest.getContextPath() + this.getSuccessUrl());
       } else {
   		response.setCharacterEncoding( Constants.BASE_ENCODING );
   		response.setContentType("application/json");
   		response.getWriter().write(Constants.NO_AUTHZ_JSON_DATA);
       }
	return false;
}
 

@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		try {
			chain.doFilter(request, response);
		} catch (Exception ex) {
//			Throwable[] causeChain = throwableAnalyzer.determineCauseChain(ex);
			response.setCharacterEncoding("UTF-8");
			response.setContentType("application/json;charset=utf-8");
			JsonData<Object> objectJsonData = new JsonData<>(StatusEnum.ACCESS_DENIED);
			response.getWriter().print(JsonUtil.toJsonString(objectJsonData));
		}
	}
 

@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
    try {
        super.doFilter(request, response, chain);
    } catch (ServletException e) {
        if (e.getCause() instanceof MaxUploadSizeExceededException) {
            response.setContentType("application/json");
            response.setCharacterEncoding("utf8");
            response.getWriter().println("{\"message\":\"文件不能超过" + AdminConstants.MAX_FILE_SIZE_IN_K + "k\",\"data\":null,\"status\":1}");
        } else {
            throw e;
        }
    }
}
 

public static void writeJson(ServletResponse response, AjaxResult ajaxResult) {
    try {
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/json; charset=utf-8");
        PrintWriter out = response.getWriter();
        out.write(
                JsonMapper.defaultMapper()
                        .toJson(ajaxResult)
        );
        out.flush();
        out.close();
    } catch (IOException e) {
        log.error("发生异常。", e);
    }
}
 

@Override
protected boolean onPreHandle(ServletRequest request, ServletResponse response, Object mappedValue) throws Exception {

    //请求的url
    String requestURL = getPathWithinApplication(request);
    System.out.println("请求的url :" + requestURL);
    Subject subject = SecurityUtils.getSubject();
    if (!subject.isAuthenticated()) {
        // 如果没有登录, 进入登录流程
        WebUtils.issueRedirect(request, response, "/admin/login");
        return false;
    }

    //从session里读取当前用户的权限URL列表
    Set<String> urls = (Set<String>) subject.getSession().getAttribute("permissionUrls");
    if (urls.contains(requestURL)) {
        return true;
    }

    //没有权限
    if (isAjax((HttpServletRequest) request)) {
        response.setCharacterEncoding("utf-8");
        response.setContentType("application/json; charset=utf-8");
        PrintWriter writer = response.getWriter();
        Map<String, Object> map = new HashMap<>();
        map.put("code", 0);
        map.put("msg", "没有权限访问");
        writer.write(JSONObject.toJSONString(map));
    } else {
        WebUtils.issueRedirect(request, response, "/403");
    }
    return false;
}
 

/**
* @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
*/
public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException {
	req.setCharacterEncoding(iEncoding);
	resp.setCharacterEncoding(iEncoding);
	chain.doFilter(req, resp);
}
 

/**
 * Handle blog posts that are not published. If the user is authenticated,
 * display a preview bar. If the user is anonymous, seve a 404.
 *
 * @param request The Sling HTTP Servlet Request.
 * @param response The Sling HTTP Servlet Response.
 * @param chain The Filter Chain to continue processin the response.
 */
@Override
public void doFilter(final ServletRequest request, final ServletResponse response,
        final FilterChain chain) throws IOException, ServletException {

    // Since this is a Sling Filter, the request and response objects are guaranteed
    // to be of types SlingHttpServletRequest and SlingHttpServletResponse.
    final SlingHttpServletRequest slingRequest = (SlingHttpServletRequest)request;
    final SlingHttpServletResponse slingResponse = (SlingHttpServletResponse)response;

    final Resource resource = slingRequest.getResource();
    final String method = slingRequest.getMethod();
    final String resourceType = resource.getResourceType();

    response.setCharacterEncoding(CharEncoding.UTF_8);

    if ("GET".equals(method) && PublickConstants.PAGE_TYPE_BLOG.equals(resourceType)) {

        if (!resource.getValueMap().get("visible", false)) {
            final boolean authorable = userService.isAuthorable(slingRequest.getResourceResolver().adaptTo(Session.class));

            /* If user is logged in and page isn't published, inject a preview bar. */
            if (authorable) {
                PrintWriter out = response.getWriter();
                CharResponseWrapper responseWrapper = new CharResponseWrapper((HttpServletResponse)response);

                try {
                  chain.doFilter(request, responseWrapper);
                } catch (Exception e) {
                  LOGGER.error("Could not continue chain", e);
                  chain.doFilter(request, response);
                }

                final String servletResponse = new String(responseWrapper.toString());
                final String previewHeader = getPreviewHeader(slingRequest, PREVIEW_HEADER_PATH);

                /* Insert component before body close tag. Append to end if body close tag doesn't exist. */
                if (servletResponse != null && servletResponse.contains(INSERTION_TAG)) {
                    String[] html = servletResponse.split(INSERTION_TAG);

                    out.write(html[0] + INSERTION_TAG + previewHeader + html[1]);
                } else {
                    out.write(servletResponse + previewHeader);
                }
            } else {
                /* If user is not logged in and page isn't published, forward to 404. */
                slingResponse.sendError(SlingHttpServletResponse.SC_NOT_FOUND);
            }
        } else {
            chain.doFilter(request, slingResponse);
        }
    } else {
        chain.doFilter(request, slingResponse);
    }
}
 

@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
                                                                                          ServletException {
    response.setCharacterEncoding("UTF-8");
    chain.doFilter(request, response);
}