Liferay 6.1开发学习

Liferay 6.1开发学习
http://www.huqiwen.com/2013/01/10/liferay-6-1-development-study-17-springmvc-portlet/

http://www.blogjava.net/allen-zhe/archive/2008/07/03/212259.html

http://www.open-open.com/lib/view/open1374399276230.html

http://www.cnblogs.com/liukemng/p/3751338.html

http://www.cnblogs.com/liukemng/p/3751338.html

http://www.googlestable.com/

http://www.aol.com/

http://208.187.128.27/
```
package com.demo.web.models;

import java.util.Date;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.format.annotation.NumberFormat;
import org.springframework.format.annotation.NumberFormat.Style;

public class FormatModel{
    
    @NumberFormat(style=Style.CURRENCY)
　　 private double money;
    @DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss")
    private Date date;
    
    public double getMoney(){
        return money;
    }
    public Date getDate(){
        return date;
    }
    
    public void setMoney(double money){
        this.money=money;
    }
    public void setDate(Date date){
        this.date=date;
    }
        
}
```
如何实现全局的异常处理？

在spring MVC的配置文件中：
Xml代码
1. 
2. <bean id="exceptionResolver" class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
3. <property name="defaultErrorView">
4. <value>/error/error</value>
5. </property>
6. <property name="defaultStatusCode">
7. <value>500</value>
8. </property>
9. <property name="warnLogCategory">
10. <value>org.springframework.web.servlet.handler.SimpleMappingExceptionResolver</value>
11. </property>
12. </bean>
这里主要的类是SimpleMappingExceptionResolver类，和他的父类AbstractHandlerExceptionResolver类。

具体可以配置哪些属性，我是通过查看源码知道的。

你也可以实现HandlerExceptionResolver接口，写一个自己的异常处理程序。spring的扩展性是很好的。

通过SimpleMappingExceptionResolver我们可以将不同的异常映射到不同的jsp页面（通过exceptionMappings属性的配置）。

同时我们也可以为所有的异常指定一个默认的异常提示页面（通过defaultErrorView属性的配置），如果所抛出的异常在exceptionMappings中没有对应的映射，则Spring将用此默认配置显示异常信息。

注意这里配置的异常显示界面均仅包括主文件名，至于文件路径和后缀已经在viewResolver中指定。如/error/error表示/error/error.jsp

显示错误的jsp页面：
Html代码
1. <%@ page language="java" contentType="text/html; charset=GBK"
2. pageEncoding="GBK"%>
3. <%@ page import="java.lang.Exception"%>
4. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
5. <html>
6. <head>
7. <meta http-equiv="Content-Type" content="text/html; charset=GBK">
8. <title>错误页面</title>
9. </head>
10. <body>
11. <h1>出错了</h1>
12. <%
13. Exception e = (Exception)request.getAttribute("exception");
14. out.print(e.getMessage());
15. %>
16. </body>
17. </html>
其中一句：request.getAttribute("exception")，key是exception，也是在SimpleMappingExceptionResolver类默认指定的，是可能通过配置文件修改这个值的，大家可以去看源码。

参考文章：

http://www.blogjava.net/wuxufeng8080/articles/191150.html

http://fangjunai.blog.163.com/blog/static/1124970520108102013839/
1. @Autowired和@Qualifier 自动注入[根据类型注入]
2. @Autowired 可以对成员变量、方法以及构造函数进行注释，
3. @Qualifier 的标注对象是成员变量、方法入参、构造函数入参。
4. ps：两者结合使用相当于@Resourcede效果。
5. @Resource 自动注入[根据名称注入],可写参数name=""
6. @Controller 表示控制器
7. @Service 表示业务处理层[一般在serviceImpl]
8. @Repository 表示持久层[一般在daoImpl]
9. @Component 当你的类不清楚是哪一层的时候使用该注解
10. @ResponseBody 异步返回数据类型为json
11. @RequestMapping 路径，请求类型等设置
12. @InitBinder 数据绑定
package org.springframework.samples.mvc31.crudcontroller;

import javax.validation.Valid;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.validation.BindingResult;

import org.springframework.web.bind.annotation.ModelAttribute;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

@Controller

@RequestMapping("/accounts")

public class AccountController {

private AccountManager accountManager;

@Autowired

public AccountController(AccountManager accountManager) {

this.accountManager = accountManager;

}

@RequestMapping(method = RequestMethod.GET)

public String list(Model model) {

model.addAttribute("accounts", this.accountManager.getAccounts());

return "accounts/list";

}

@RequestMapping(value="/new", method = RequestMethod.GET)

public String newForm(Model model) {

model.addAttribute(new Account());

return "accounts/new";

}

// The account is loaded from the "account" URI variable via {@link AccountConverter}.

@RequestMapping(value="/{account}/edit", method = RequestMethod.GET)

public String edit(@PathVariable Account account) {

return "accounts/edit";

}

// The account is loaded from the "account" URI variable via {@link AccountConverter}.

// Data binding and validation are also applied.

@RequestMapping(value="/{account}", method = RequestMethod.PUT)

public String update(@Valid @ModelAttribute Account account, BindingResult result) {

if (result.hasErrors()) {

return "accounts/edit";

}

this.accountManager.saveOrUpdate(account);

return "redirect:../accounts";

}

// The account is created with its default constructor.

// Data binding and validation are also applied.

@RequestMapping(method = RequestMethod.POST)

public String save(@Valid @ModelAttribute Account account, BindingResult result) {

if (result.hasErrors()) {

return "accounts/edit";

}

this.accountManager.saveOrUpdate(account);

return "redirect:accounts";

}

// The account is loaded from the "account" URI variable via {@link AccountConverter}.

@RequestMapping(value="/{account}", method = RequestMethod.DELETE)

public String delete(@PathVariable Account account) {

this.accountManager.delete(account);

return "redirect:../accounts";

}

}

package com.sprhib.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.ModelAttribute;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.servlet.ModelAndView;

import com.sprhib.model.Team;

import com.sprhib.service.TeamService;

@Controller

@RequestMapping(value="/team")

public class TeamController {

@Autowired

private TeamService teamService;

@RequestMapping(value="/add", method=RequestMethod.GET)

public ModelAndView addTeamPage() {

ModelAndView modelAndView = new ModelAndView("add-team-form");

modelAndView.addObject("team", new Team());

return modelAndView;

}

@RequestMapping(value="/add", method=RequestMethod.POST)

public ModelAndView addingTeam(@ModelAttribute Team team) {

ModelAndView modelAndView = new ModelAndView("home");

teamService.addTeam(team);

String message = "Team was successfully added.";

modelAndView.addObject("message", message);

return modelAndView;

}

@RequestMapping(value="/list")

public ModelAndView listOfTeams() {

ModelAndView modelAndView = new ModelAndView("list-of-teams");

List<Team> teams = teamService.getTeams();

modelAndView.addObject("teams", teams);

return modelAndView;

}

@RequestMapping(value="/edit/{id}", method=RequestMethod.GET)

public ModelAndView editTeamPage(@PathVariable Integer id) {

ModelAndView modelAndView = new ModelAndView("edit-team-form");

Team team = teamService.getTeam(id);

modelAndView.addObject("team",team);

return modelAndView;

}

@RequestMapping(value="/edit/{id}", method=RequestMethod.POST)

public ModelAndView edditingTeam(@ModelAttribute Team team, @PathVariable Integer id) {

ModelAndView modelAndView = new ModelAndView("home");

teamService.updateTeam(team);

String message = "Team was successfully edited.";

modelAndView.addObject("message", message);

return modelAndView;

}

@RequestMapping(value="/delete/{id}", method=RequestMethod.GET)

public ModelAndView deleteTeam(@PathVariable Integer id) {

ModelAndView modelAndView = new ModelAndView("home");

teamService.deleteTeam(id);

String message = "Team was successfully deleted.";

modelAndView.addObject("message", message);

return modelAndView;

}

}

package org.jamesdbloom.web.controller;

import org.jamesdbloom.dao.UserDAO;

import org.jamesdbloom.domain.User;

import org.jamesdbloom.email.EmailService;

import org.jamesdbloom.uuid.UUIDFactory;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.core.env.Environment;

import org.springframework.security.web.csrf.CsrfToken;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.validation.BindingResult;

import org.springframework.validation.ObjectError;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.annotation.Resource;

import javax.servlet.http.HttpServletRequest;

import javax.validation.Valid;

import java.io.UnsupportedEncodingException;

import java.net.MalformedURLException;

/**

* @author jamesdbloom

*/

@Controller

public class RegistrationController {

    protected Logger logger = LoggerFactory.getLogger(getClass());

    @Resource

    private UserDAO userDAO;

    @Resource

    private Environment environment;

    @Resource

    private EmailService emailService;

    @Resource

    private UUIDFactory uuidFactory;

    private void setupModel(Model model) {

        model.addAttribute("passwordPattern", User.PASSWORD_PATTERN);

        model.addAttribute("emailPattern", User.EMAIL_PATTERN);

        model.addAttribute("environment", environment);

    }

    @RequestMapping(value = "/register", method = RequestMethod.GET)

    public String registerForm(HttpServletRequest request, Model model) {

        setupModel(model);

        model.addAttribute("user", new User());

        CsrfToken csrfToken = (CsrfToken) request.getAttribute(CsrfToken.class.getName());

        if (csrfToken != null) {

            model.addAttribute("csrfParameterName", csrfToken.getParameterName());

            model.addAttribute("csrfToken", csrfToken.getToken());

        }

        return "register";

    }

    @RequestMapping(value = "/register", method = RequestMethod.POST)

    public String register(@Valid User user, BindingResult bindingResult, HttpServletRequest request, Model model, RedirectAttributes redirectAttributes) throws MalformedURLException, UnsupportedEncodingException {

        boolean userAlreadyExists = user.getEmail() != null && (userDAO.findByEmail(user.getEmail()) != null);

        if (bindingResult.hasErrors() || userAlreadyExists) {

            setupModel(model);

            if (userAlreadyExists) {

                bindingResult.addError(new ObjectError("user", "validation.user.alreadyExists"));

            }

            model.addAttribute("bindingResult", bindingResult);

            model.addAttribute("user", user);

            return "register";

        }

        user.setOneTimeToken(uuidFactory.generateUUID());

        userDAO.save(user);

        emailService.sendRegistrationMessage(user, request);

        redirectAttributes.addFlashAttribute("message", "Your account has been created and an email has been sent to " + user.getEmail() + " with a link to create your password and login, please check your spam folder if you don't see the email within 5 minutes");

        redirectAttributes.addFlashAttribute("title", "Account Created");

        return "redirect:/message";

    }

}

package org.davidmendoza.fileUpload.web;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Iterator;

import java.util.LinkedList;

import java.util.List;

import java.util.Map;

import java.util.UUID;

import javax.imageio.ImageIO;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.IOUtils;

import org.davidmendoza.fileUpload.config.PropertyPlaceholderConfig;

import org.davidmendoza.fileUpload.dao.ImageDao;

import org.davidmendoza.fileUpload.model.Image;

import org.imgscalr.Scalr;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.context.annotation.Import;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.ResponseBody;

import org.springframework.web.multipart.MultipartFile;

import org.springframework.web.multipart.MultipartHttpServletRequest;

/**

*

* @author jdmr

*/

@Controller

@RequestMapping

@Import(PropertyPlaceholderConfig.class)

public class ImageController {



    private static final Logger log = LoggerFactory.getLogger(ImageController.class);



    @Autowired

    private ImageDao imageDao;

    @Value("${file.upload.directory}")

    private String fileUploadDirectory;

    @RequestMapping

    public String index() {

        log.debug("ImageController home");

        return "image/index";

    }



    @RequestMapping(value = "/upload", method = RequestMethod.GET)

    public @ResponseBody Map list() {

        log.debug("uploadGet called");

        List<Image> list = imageDao.list();

        for(Image image : list) {

            image.setUrl("/picture/"+image.getId());

            image.setThumbnailUrl("/thumbnail/"+image.getId());

            image.setDeleteUrl("/delete/"+image.getId());

            image.setDeleteType("DELETE");

        }

        Map<String, Object> files = new HashMap<>();

        files.put("files", list);

        log.debug("Returning: {}", files);

        return files;

    }



    @RequestMapping(value = "/upload", method = RequestMethod.POST)

    public @ResponseBody Map upload(MultipartHttpServletRequest request, HttpServletResponse response) {

        log.debug("uploadPost called");

        Iterator<String> itr = request.getFileNames();

        MultipartFile mpf;

        List<Image> list = new LinkedList<>();



        while (itr.hasNext()) {

            mpf = request.getFile(itr.next());

            log.debug("Uploading {}", mpf.getOriginalFilename());



            String newFilenameBase = UUID.randomUUID().toString();

            String originalFileExtension = mpf.getOriginalFilename().substring(mpf.getOriginalFilename().lastIndexOf("."));

            String newFilename = newFilenameBase + originalFileExtension;

            String storageDirectory = fileUploadDirectory;

            String contentType = mpf.getContentType();



            File newFile = new File(storageDirectory + "/" + newFilename);

            try {

                mpf.transferTo(newFile);



                BufferedImage thumbnail = Scalr.resize(ImageIO.read(newFile), 290);

                String thumbnailFilename = newFilenameBase + "-thumbnail.png";

                File thumbnailFile = new File(storageDirectory + "/" + thumbnailFilename);

                ImageIO.write(thumbnail, "png", thumbnailFile);



                Image image = new Image();

                image.setName(mpf.getOriginalFilename());

                image.setThumbnailFilename(thumbnailFilename);

                image.setNewFilename(newFilename);

                image.setContentType(contentType);

                image.setSize(mpf.getSize());

                image.setThumbnailSize(thumbnailFile.length());

                image = imageDao.create(image);



                image.setUrl("/picture/"+image.getId());

                image.setThumbnailUrl("/thumbnail/"+image.getId());

                image.setDeleteUrl("/delete/"+image.getId());

                image.setDeleteType("DELETE");



                list.add(image);



            } catch(IOException e) {

                log.error("Could not upload file "+mpf.getOriginalFilename(), e);

            }



        }



        Map<String, Object> files = new HashMap<>();

        files.put("files", list);

        return files;

    }



    @RequestMapping(value = "/picture/{id}", method = RequestMethod.GET)

    public void picture(HttpServletResponse response, @PathVariable Long id) {

        Image image = imageDao.get(id);

        File imageFile = new File(fileUploadDirectory+"/"+image.getNewFilename());

        response.setContentType(image.getContentType());

        response.setContentLength(image.getSize().intValue());

        try {

            InputStream is = new FileInputStream(imageFile);

            IOUtils.copy(is, response.getOutputStream());

        } catch(IOException e) {

            log.error("Could not show picture "+id, e);

        }

    }



    @RequestMapping(value = "/thumbnail/{id}", method = RequestMethod.GET)

    public void thumbnail(HttpServletResponse response, @PathVariable Long id) {

        Image image = imageDao.get(id);

        File imageFile = new File(fileUploadDirectory+"/"+image.getThumbnailFilename());

        response.setContentType(image.getContentType());

        response.setContentLength(image.getThumbnailSize().intValue());

        try {

            InputStream is = new FileInputStream(imageFile);

            IOUtils.copy(is, response.getOutputStream());

        } catch(IOException e) {

            log.error("Could not show thumbnail "+id, e);

        }

    }



    @RequestMapping(value = "/delete/{id}", method = RequestMethod.DELETE)

    public @ResponseBody List delete(@PathVariable Long id) {

        Image image = imageDao.get(id);

        File imageFile = new File(fileUploadDirectory+"/"+image.getNewFilename());

        imageFile.delete();

        File thumbnailFile = new File(fileUploadDirectory+"/"+image.getThumbnailFilename());

        thumbnailFile.delete();

        imageDao.delete(image);

        List<Map<String, Object>> results = new ArrayList<>();

        Map<String, Object> success = new HashMap<>();

        success.put("success", true);

        results.add(success);

        return results;

    }

<%@page contentType="text/html" pageEncoding="UTF-8"%>

<%@taglib prefix="s" uri="http://www.springframework.org/tags" %>

<!DOCTYPE HTML>



<html lang="en">

<head>

    

    

    <meta charset="utf-8">

    <title>jQuery File Upload Demo</title>

    <meta name="description" content="File Upload widget with multiple file selection, drag&drop support, progress bars, validation and preview images, audio and video for jQuery. Supports cross-domain, chunked and resumable file uploads and client-side image resizing. Works with any server-side platform (PHP, Python, Ruby on Rails, Java, Node.js, Go etc.) that supports standard HTML form file uploads.">

    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    

    <link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">

    

    <link rel="stylesheet" href="css/style.css">

    

    <link rel="stylesheet" href="http://blueimp.github.io/Gallery/css/blueimp-gallery.min.css">

    

    <link rel="stylesheet" href="css/jquery.fileupload.css">

    <link rel="stylesheet" href="css/jquery.fileupload-ui.css">

    

    <noscript><link rel="stylesheet" href="css/jquery.fileupload-noscript.css"></noscript>

    <noscript><link rel="stylesheet" href="css/jquery.fileupload-ui-noscript.css"></noscript>

</head>

<body>

<div class="navbar navbar-default navbar-fixed-top">

    <div class="container">

        <div class="navbar-header">

            <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-fixed-top .navbar-collapse">

                <span class="icon-bar"></span>

                <span class="icon-bar"></span>

                <span class="icon-bar"></span>

            </button>

            <a class="navbar-brand" href="https://github.com/blueimp/jQuery-File-Upload">jQuery File Upload</a>

        </div>

        <div class="navbar-collapse collapse">

            <ul class="nav navbar-nav">

                <li><a href="https://github.com/blueimp/jQuery-File-Upload/tags">Download</a></li>

                <li><a href="https://github.com/blueimp/jQuery-File-Upload">Source Code</a></li>

                <li><a href="https://github.com/blueimp/jQuery-File-Upload/wiki">Documentation</a></li>

                <li><a href="https://blueimp.net">© Sebastian Tschan</a></li>

            </ul>

        </div>

    </div>

</div>

<div class="container">

    <h1>jQuery File Upload Demo</h1>

    <h2 class="lead">Basic Plus UI version</h2>

    <ul class="nav nav-tabs">

        <li><a href="basic.html">Basic</a></li>

        <li><a href="basic-plus.html">Basic Plus</a></li>

        <li class="active"><a href="index.html">Basic Plus UI</a></li>

        <li><a href="angularjs.html">AngularJS</a></li>

        <li><a href="jquery-ui.html">jQuery UI</a></li>

    </ul>

    <br>

    <blockquote>

        <p>File Upload widget with multiple file selection, drag&drop support, progress bars, validation and preview images, audio and video for jQuery.<br>

            Supports cross-domain, chunked and resumable file uploads and client-side image resizing.<br>

            Works with any server-side platform (PHP, Python, Ruby on Rails, Java, Node.js, Go etc.) that supports standard HTML form file uploads.</p>

    </blockquote>

    <br>

    

    <form id="fileupload" action='<s:url value="/upload"/>' method="POST" enctype="multipart/form-data">

        

        <noscript><input type="hidden" name="redirect" value="http://blueimp.github.io/jQuery-File-Upload/"></noscript>

        

        <div class="row fileupload-buttonbar">

            <div class="col-lg-7">

                

                <span class="btn btn-success fileinput-button">

                    <i class="glyphicon glyphicon-plus"></i>

                    <span>Add files...</span>

                    <input type="file" name="files[]" multiple>

                </span>

                <button type="submit" class="btn btn-primary start">

                    <i class="glyphicon glyphicon-upload"></i>

                    <span>Start upload</span>

                </button>

                <button type="reset" class="btn btn-warning cancel">

                    <i class="glyphicon glyphicon-ban-circle"></i>

                    <span>Cancel upload</span>

                </button>

                <button type="button" class="btn btn-danger delete">

                    <i class="glyphicon glyphicon-trash"></i>

                    <span>Delete</span>

                </button>

                <input type="checkbox" class="toggle">

                

                <span class="fileupload-process"></span>

            </div>

            

            <div class="col-lg-5 fileupload-progress fade">

                

                <div class="progress progress-striped active" role="progressbar" aria-valuemin="0" aria-valuemax="100">

                    <div class="progress-bar progress-bar-success" style="0%;"></div>

                </div>

                

                <div class="progress-extended"> </div>

            </div>

        </div>

        

        <table role="presentation" class="table table-striped"><tbody class="files"></tbody></table>

    </form>

    <br>

    <div class="panel panel-default">

        <div class="panel-heading">

            <h3 class="panel-title">Demo Notes</h3>

        </div>

        <div class="panel-body">

            <ul>

                <li>The maximum file size for uploads in this demo is <strong>5 MB</strong> (default file size is unlimited).</li>

                <li>Only image files (<strong>JPG, GIF, PNG</strong>) are allowed in this demo (by default there is no file type restriction).</li>

                <li>Uploaded files will be deleted automatically after <strong>5 minutes</strong> (demo setting).</li>

                <li>You can <strong>drag & drop</strong> files from your desktop on this webpage (see <a href="https://github.com/blueimp/jQuery-File-Upload/wiki/Browser-support">Browser support</a>).</li>

                <li>Please refer to the <a href="https://github.com/blueimp/jQuery-File-Upload">project website</a> and <a href="https://github.com/blueimp/jQuery-File-Upload/wiki">documentation</a> for more information.</li>

                <li>Built with Twitter's <a href="http://twitter.github.com/bootstrap/">Bootstrap</a> CSS framework and Icons from <a href="http://glyphicons.com/">Glyphicons</a>.</li>

            </ul>

        </div>

    </div>

</div>



<div id="blueimp-gallery" class="blueimp-gallery blueimp-gallery-controls" data-filter=":even">

    <div class="slides"></div>

    <h3 class="title"></h3>

    <a class="prev">‹</a>

    <a class="next">›</a>

    <a class="close">×</a>

    <a class="play-pause"></a>

    <ol class="indicator"></ol>

</div>



<script id="template-upload" type="text/x-tmpl">

{% for (var i=0, file; file=o.files[i]; i++) { %}

    <tr class="template-upload fade">

        <td>

            <span class="preview"></span>

        </td>

        <td>

            <p class="name">{%=file.name%}</p>

            <strong class="error text-danger"></strong>

        </td>

        <td>

            <p class="size">Processing...</p>

            <div class="progress progress-striped active" role="progressbar" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0"><div class="progress-bar progress-bar-success" style="0%;"></div></div>

        </td>

        <td>

            {% if (!i && !o.options.autoUpload) { %}

                <button class="btn btn-primary start">

                    <i class="glyphicon glyphicon-upload"></i>

                    <span>Start</span>

                </button>

            {% } %}

            {% if (!i) { %}

                <button class="btn btn-warning cancel">

                    <i class="glyphicon glyphicon-ban-circle"></i>

                    <span>Cancel</span>

                </button>

            {% } %}

        </td>

    </tr>

{% } %}

</script>



<script id="template-download" type="text/x-tmpl">

{% for (var i=0, file; file=o.files[i]; i++) { %}

    <tr class="template-download fade">

        <td>

            <span class="preview">

                {% if (file.thumbnailUrl) { %}

                    <a href="{%=file.url%}" title="{%=file.name%}" download="{%=file.name%}" data-gallery><img src="{%=file.thumbnailUrl%}"></a>

                {% } %}

            </span>

        </td>

        <td>

            <p class="name">

                {% if (file.url) { %}

                    <a href="{%=file.url%}" title="{%=file.name%}" download="{%=file.name%}" {%=file.thumbnailUrl?'data-gallery':''%}>{%=file.name%}</a>

                {% } else { %}

                    <span>{%=file.name%}</span>

                {% } %}

            </p>

            {% if (file.error) { %}

                <div><span class="label label-danger">Error</span> {%=file.error%}</div>

            {% } %}

        </td>

        <td>

            <span class="size">{%=o.formatFileSize(file.size)%}</span>

        </td>

        <td>

            {% if (file.deleteUrl) { %}

                <button class="btn btn-danger delete" data-type="{%=file.deleteType%}" data-url="{%=file.deleteUrl%}"{% if (file.deleteWithCredentials) { %} data-xhr-fields='{"withCredentials":true}'{% } %}>

                    <i class="glyphicon glyphicon-trash"></i>

                    <span>Delete</span>

                </button>

                <input type="checkbox" name="delete" value="1" class="toggle">

            {% } else { %}

                <button class="btn btn-warning cancel">

                    <i class="glyphicon glyphicon-ban-circle"></i>

                    <span>Cancel</span>

                </button>

            {% } %}

        </td>

    </tr>

{% } %}

</script>

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>



<script src="js/vendor/jquery.ui.widget.js"></script>



<script src="http://blueimp.github.io/JavaScript-Templates/js/tmpl.min.js"></script>



<script src="http://blueimp.github.io/JavaScript-Load-Image/js/load-image.min.js"></script>



<script src="http://blueimp.github.io/JavaScript-Canvas-to-Blob/js/canvas-to-blob.min.js"></script>



<script src="//netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>



<script src="http://blueimp.github.io/Gallery/js/jquery.blueimp-gallery.min.js"></script>



<script src="js/jquery.iframe-transport.js"></script>



<script src="js/jquery.fileupload.js"></script>



<script src="js/jquery.fileupload-process.js"></script>



<script src="js/jquery.fileupload-image.js"></script>



<script src="js/jquery.fileupload-audio.js"></script>



<script src="js/jquery.fileupload-video.js"></script>



<script src="js/jquery.fileupload-validate.js"></script>



<script src="js/jquery.fileupload-ui.js"></script>



<script src="js/main.js"></script>





</body>

</html>

package tr.com.lucidcode.controller;

import java.awt.image.BufferedImage;

import java.io.ByteArrayOutputStream;

import javax.annotation.Resource;

import javax.servlet.ServletOutputStream;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.ResponseBody;

import com.octo.captcha.service.CaptchaServiceException;

import com.octo.captcha.service.image.ImageCaptchaService;

import com.sun.image.codec.jpeg.JPEGCodec;

import com.sun.image.codec.jpeg.JPEGImageEncoder;

@SuppressWarnings("restriction")

@Controller

@RequestMapping("/captcha")

public class CaptchaController {

protected static Logger logger = Logger.getLogger("controller");

@Resource(name = "captchaService")

private ImageCaptchaService captchaService;

@RequestMapping(value = "/getImage", method = RequestMethod.GET)

public @ResponseBody

Model showImage(HttpServletRequest request,

HttpServletResponse response, Model model) throws Exception {

logger.debug("Received a request to show captcha image");

byte[] captchaChallengeAsJpeg = null;

// the output stream to render the captcha image as jpeg into

ByteArrayOutputStream jpegOutputStream = new ByteArrayOutputStream();

try {

// get the session id that will identify the generated captcha.

// the same id must be used to validate the response, the session id

// is a good candidate!

String captchaId = request.getSession().getId();

logger.debug("Captcha ID which gave the image::" + captchaId);

// call the ImageCaptchaService getChallenge method

BufferedImage challenge = captchaService.getImageChallengeForID(

captchaId, request.getLocale());

// a jpeg encoder

JPEGImageEncoder jpegEncoder = JPEGCodec

.createJPEGEncoder(jpegOutputStream);

jpegEncoder.encode(challenge);

} catch (IllegalArgumentException e) {

response.sendError(HttpServletResponse.SC_NOT_FOUND);

return null;

} catch (CaptchaServiceException e) {

response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);

return null;

}

captchaChallengeAsJpeg = jpegOutputStream.toByteArray();

// flush it in the response

response.setHeader("Cache-Control", "no-store");

response.setHeader("Pragma", "no-cache");

response.setDateHeader("Expires", 0);

// response.setContentType("image/jpeg");

// response.getOutputStream().write(jpegOutputStream);

ServletOutputStream responseOutputStream = response.getOutputStream();

responseOutputStream.write(captchaChallengeAsJpeg);

responseOutputStream.flush();

responseOutputStream.close();

return null;

}

}
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原文地址：https://www.cnblogs.com/fx2008/p/3802912.html