Java处理wangeditor上传图片并升级一下
2021/9/18 1:04:47
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wangeditor上传图片
1.在页面上设置富文本编辑器
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <script src="static/js/jquery-3.5.1.js"></script> <!--jquery拿来备用--> <script src="static/js/wangEditor.min.js"></script> <!--引入wangEditor的js文件--> <title>Insert title here</title> </head> <body> <span>WANGEDITOR富文本编辑器</span> <br> <div id="myeditor" style="height: 600px;width: 800px"> <p>默认的值</p> </div> <script> const E = window.wangEditor const editor = new E('#myeditor') /*为富文本编辑器绑定显示的div容器*/ editor.config.uploadImgServer = '${pageContext.request.contextPath}/upload_img.do'; editor.config.uploadFileName = 'file'; /*设置编辑器上传文件的请求接口,和参数名称*/ editor.create() //创建wangeditor编辑器 </script> </body> </html>
2.wangeditor的上传图片返回格式的要求(官方文档)
接口返回格式,重要
接口要返回 application/json
格式,格式要求如下:
必须返回如下格式,图片才会回显,需要构造一个Vo类
{ // errno 即错误代码,0 表示没有错误。 // 如果有错误,errno != 0,可通过下文中的监听函数 fail 拿到该错误码进行自定义处理 "errno": 0, // data 是一个数组,返回图片Object,Object中包含需要包含url、alt和href三个属性,它们分别代表图片地址、图片文字说明和跳转链接,alt和href属性是可选的,可以不设置或设置为空字符串,需要注意的是url是一定要填的。 "data": [ { url: "图片地址", alt: "图片文字说明", href: "跳转链接" }, { url: "图片地址1", alt: "图片文字说明1", href: "跳转链接1" }, "……" ] }
wangEditor返回包装类
public class WangEditorVO { //错误码 private Integer errno; //data数据 private Object data; public Integer getErrno() { return errno; } public Object getData() { return data; } public static WangEditorVO success(Object data) { WangEditorVO wangEditorVO = new WangEditorVO(); wangEditorVO.errno = 0; wangEditorVO.data = data; return wangEditorVO; } public static WangEditorVO error(Integer errno, Object data) { WangEditorVO wangEditorVO = new WangEditorVO(); wangEditorVO.errno = errno; wangEditorVO.data = data; return wangEditorVO; } }
3.编写上传图片接口(使用springMVC)
/** * * @ClassName: TestController * @Description:TODO(描述这个类的作用) * @author: 你的名字 * @date: 2021年9月16日 上午9:44:26 * @Copyright: */ @Controller public class TestController { /*上传图片接口*/ @RequestMapping("/upload_img.do") @ResponseBody public WangEditorVO UploadFileInWangEditor(@RequestParam("file") MultipartFile file) throws IllegalStateException, IOException { //接收上传的图片 String oldname = file.getOriginalFilename(); //保存到项目的upload目录下 file.transferTo(new File("E:\\vc++\\AllAnnoationTest\\WebContent\\upload","fucking"+oldname)); List<String> list = new ArrayList<String>(); //因为回显的图片使用src属性,必须使用url形式,不能使用绝对路径 String resource = "http://localhost:8082/AllAnnoationTest/upload/fucking"+oldname; //放入list集合 list.add(resource); return WangEditorVO.success(list); //创建Vo类并传入data属性,然后返回 } }
4.测试,查看网页的控制台
5.升级,保存带图片的文章,(全注解JPA)
将内容保存到数据库中去(全注解使用JPA)
编写主配Class,DataSourceConfig
/** * * @ClassName: DataSourceConfig * @Description: 配置数据源 * @author: 你的名字 * @date: 2021年9月17日 下午7:20:16 * @Copyright: */ @Configuration @EnableAspectJAutoProxy() //开启自动代理 @EnableTransactionManagement //开启注解事务 public class DataSourceConfig { /*配置C3P0数据源*/ @Bean public DataSource dataSource() throws PropertyVetoException { ComboPooledDataSource datasource = new ComboPooledDataSource(); datasource.setJdbcUrl("jdbc:mysql://localhost:3306/jpatest?useSSL=true&useUnicode=true&CharacterEncoding=UTF-8&serverTimeZone=UTC"); datasource.setDriverClass("com.mysql.cj.jdbc.Driver"); datasource.setUser("root"); datasource.setPassword("XXXXXXXXXXXXXXXXX"); return datasource; } /** * * @Title: entityManagerFactory * @Description: 配置entityManageFatory(SessionFactory) Session工厂 * @param: @return * @param: @throws PropertyVetoException * @return: LocalContainerEntityManagerFactoryBean * @throws */ @Bean public EntityManagerFactory entityManagerFactory() throws PropertyVetoException { LocalContainerEntityManagerFactoryBean enFactory = new LocalContainerEntityManagerFactoryBean(); enFactory.setDataSource(dataSource()); //设置JPA的Hibernate适配器 HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter(); vendorAdapter.setGenerateDdl(true); //扫描实体类所在的包 enFactory.setJpaVendorAdapter(vendorAdapter); enFactory.setPackagesToScan("com.anno.pojo"); //设置JPA的一些特性信息 Properties properties = new Properties(); properties.put("hibernate.show_sql", "true"); properties.put("hibernate.format_sql", "true"); properties.put("hibernate.dialect", "org.hibernate.dialect.MySQL8Dialect"); properties.put("hibernate.hbm2ddl.auto", "update"); enFactory.setJpaProperties(properties); enFactory.afterPropertiesSet(); //用spring提供的转型转为符合JPA规范的EntityManageFactory接口的方法转型然后返回 return enFactory.getObject(); } /*配置事务管理器*/ @Bean public PlatformTransactionManager transactionManager() throws PropertyVetoException { JpaTransactionManager manager = new JpaTransactionManager(); manager.setEntityManagerFactory(entityManagerFactory()); //设置JPA的事务管理器,注入Session工厂,(EntityManageFactory) return manager; } }
(PS.WebMvc的配置)
/** * * @ClassName: WebMvcConfig * @Description:配置SpringMVC * @author: 黎翰 * @date: 2021年9月16日 上午9:29:51 * @Copyright: */ @Configuration @ComponentScan("com.anno") @EnableWebMvc public class WebMvcConfig implements WebMvcConfigurer { /*** * 通过注解 @Bean 初始化视图解析器 * @return ViewResolver 视图解析器 */ @Bean(name="internalResourceViewResolver") public ViewResolver initViewResolver() { InternalResourceViewResolver viewResolver =new InternalResourceViewResolver(); viewResolver.setPrefix(""); viewResolver.setSuffix(".jsp"); return viewResolver; } /** * 初始化RequestMappingHandlerAdapter,并加载Http的Json转换器 * @return RequestMappingHandlerAdapter 对象 */ @Bean(name="requestMappingHandlerAdapter") public HandlerAdapter initRequestMappingHandlerAdapter() { //创建RequestMappingHandlerAdapter适配器 RequestMappingHandlerAdapter rmhd = new RequestMappingHandlerAdapter(); // HTTP JSON转换器 MappingJackson2HttpMessageConverter jsonConverter = new MappingJackson2HttpMessageConverter(); //MappingJackson2HttpMessageConverter接收JSON类型消息的转换 MediaType mediaType = MediaType.APPLICATION_JSON_UTF8; List<MediaType> mediaTypes = new ArrayList<MediaType>(); mediaTypes.add(mediaType); //加入转换器的支持类型 jsonConverter.setSupportedMediaTypes(mediaTypes); //往适配器加入json转换器 rmhd.getMessageConverters().add(jsonConverter); return rmhd; } /** * * @Title: commonsMultipartResolver * @Description: 配置上传文件解析器 * @param: @return * @return: CommonsMultipartResolver * @throws */ @Bean public CommonsMultipartResolver multipartResolver() { CommonsMultipartResolver resolver = new CommonsMultipartResolver(); resolver.setDefaultEncoding("UTF-8"); resolver.setMaxInMemorySize(1024*1024*10); resolver.setMaxUploadSize(1024*1024*20); return resolver; } @Override public void addResourceHandlers(ResourceHandlerRegistry registry) { registry.addResourceHandler("/static/**").addResourceLocations("/static/"); registry.addResourceHandler("/upload/**").addResourceLocations("/upload/"); WebMvcConfigurer.super.addResourceHandlers(registry); } }
WebInit配置(代替的Web.xml)
/** * * @ClassName: WebInit * @Description: 代替了Web.xml文件 * @author: 黎翰 * @date: 2021年9月16日 上午9:16:38 * @Copyright: */ public class WebInit extends AbstractAnnotationConfigDispatcherServletInitializer{ @Override protected Class<?>[] getRootConfigClasses() { return null; } @Override protected Class<?>[] getServletConfigClasses() { return new Class[] {WebMvcConfig.class}; } @Override protected String[] getServletMappings() { return new String[] {"*.do"}; } @Override public void onStartup(ServletContext servletContext) throws ServletException { servletContext.addFilter("encodingFilter", MyencodingFilter.class) .addMappingForUrlPatterns(null, false, "/*"); //必须调用父类的onStarup不然DispatchServlet不会加载 super.onStartup(servletContext); } }
dao层:
/** * * @ClassName: ArticleDaoImpl * @Description:文章Dao的实现类 * @author: 黎翰 * @date: 2021年9月17日 下午8:04:11 * @Copyright: */ @Repository public class ArticleDaoImpl implements ArticleDao{ @PersistenceContext private EntityManager entityManager;//Session @Override public void SaveArticle(Article article) { entityManager.persist(article); } @Override public Article getArticle(Integer id) { return entityManager.find(Article.class, id); } }
service层:
@Service public class ArticleService { @Autowired private ArticleDao articleDao; @Transactional public void SaveArticle(Article article) { articleDao.SaveArticle(article); } public Article getArticle(Integer id) { return articleDao.getArticle(id); } }
pojo:
/** * * @ClassName: Article * @Description:保存输入的文章pojo * @author: 黎翰 * @date: 2021年9月17日 下午7:25:27 * @Copyright: */ @Entity @Table(name="t_article") public class Article { @Id @GeneratedValue(strategy=GenerationType.IDENTITY) @Column(name="a_id") private Integer id; @Column(name="a_title") private String title; @Column(name="a_auther") private String auther; @Column(name="a_context",length=500) private String context; //-------------------省略Getter&Setter方法 }
控制层:
@RequestMapping("/submitArticle.do") @ResponseBody public String submitArticle(Article article) { //调用业务层保存到数据库里去 articleService.SaveArticle(article); System.out.println("标题为"+article.getTitle()); System.out.println("作者为"+article.getAuther()); System.out.println("内容为"+article.getContext()); return "提交成功"; }
页面:
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <script src="static/js/jquery-3.5.1.js"></script> <script src="static/js/wangEditor.min.js"></script> <title>Insert title here</title> </head> <body> <span>WANGEDITOR富文本编辑器--------------------------------------------------</span><br> <span>标题</span><input id="theTitle" type="text" name="title" /><br> <span>作者</span><input id="theAuther" type="text" name="auther" /> <div id="myeditor" style="height: 600px;width: 800px"> <p>默认的值</p> </div> <script> const E = window.wangEditor const editor = new E('#myeditor') editor.config.uploadImgServer = '${pageContext.request.contextPath}/upload_img.do'; editor.config.uploadFileName = 'file'; editor.create(); </script> <!-- 用一个按钮来提交AJAX,帮个AJAX函数 --> <input id="sub" type="button" οnclick="AJAXsubmit()" value="提交文章"> <script> var AJAXsubmit = function(){ $.ajax({ url:"${pageContext.request.contextPath}/submitArticle.do", type:"POST", data:{"title":$('#theTitle').val(),"auther":$('#theAuther').val(),"context":editor.txt.html()}, success:function(result){ alert(result); } }); } </script> </body> </html>
测试:
6.查看保存的文章,是否能正常显示图片
前提:和Spring和整合Hibernate一样,Spring为Hibernate提供了OpenSessionInViewFilter(懒加载拦截器)
让Hibernate的懒加载机制,能够在视图层才发送sql语句进行查询,
Spring也为JPA提供了类似的懒加载拦截器,可以在spring-orm包的jpa子包中看到
现在需要配置上Filter,在WebInit类中注册EntityManageInViewFilter,
@Override public void onStartup(ServletContext servletContext) throws ServletException { //自定义的字符编码过滤器 servletContext.addFilter("encodingFilter", MyencodingFilter.class) .addMappingForUrlPatterns(null, false, "/*"); //配置懒加载拦截器 servletContext.addFilter("openEntityManagerInView", OpenEntityManagerInViewFilter.class) .addMappingForUrlPatterns(null, false, "/*"); //必须调用父类的onStarup不然DispatchServlet不会加载 super.onStartup(servletContext); }
现在编写请求,将数据库里的文章显示出来
@RequestMapping("/testaction.do") public String test1(Model model) { //调用业务对象,查询t_article的指定id文章 Article myarticle = articleService.getArticle(2); model.addAttribute("myarticle", myarticle); return "success"; }
在页面里显示一下:
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <span>标题:</span>${myarticle.title}<br> <span>作者:</span>${myarticle.auther}<br> ${myarticle.context} </body> </html> ```![请添加图片描述](https://www.www.zyiz.net/i/ll/?i=00bba0d67f364f41bdb9278e3ebb10cf.png?,type_ZHJvaWRzYW5zZmFsbGJhY2s,shadow_50,text_Q1NETiBA572X6ams6IuP5Li56buY572V6buY5b63,size_20,color_FFFFFF,t_70,g_se,x_16)
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