Struts开发笔记二

Struts2

配置细节问题

• struts.xml中默认配置

  <default-action-ref name="default"></default-action-ref><default-class-ref class="com.example.struts2.DefaultAction"> </default-class-ref><action name="default">    <result name="success">/index.jsp</result></action>

  • 通用界面配置 —如果某个action中没有对应的result，默认跳转到default.jsp中

    <global-results>    <result>/default.jsp</result></global-results>

• 全局异常

  <global-exception-mappings>    <exception-mapping result="error" exception="java.lang.Exception"        name="ErrorAction"></exception-mapping></global-exception-mappings>

• 常用常量配置

  <constant name="struts.action.extension" value="action,do,"/> <constant name="struts.devMode" value="true" />  提供详细报错页面，修改struts.xml后不需要重启服务器 （要求）<constant name="struts.serve.static.browserCache" value="false"/> false不缓存，true浏览器会缓存静态内容，产品环境设置true、开发环境设置false 

• struts.xml模块分离

  <include file="struts-user.xml"></include>复制 创建struts-user的xml文件

文件上传

企业常用文件上传技术 ： jspSmartUpload（主要应用 JSP model1 时代） 、
fileupload （Apache commons项目中一个组件）、
Servlet3.0 集成文件上传 Part类
文件上传 enctype=”multipart/form-data”
是 MIME协议定义多部分请求体 （消息体）

private File upload;private String uploadContentType;private String uploadFileName;public void setUpload(File upload) {    this.upload = upload;}public void setUploadFileName(String uploadFileName) {    this.uploadFileName = uploadFileName;}public void setUploadContentType(String uploadContentType) {    this.uploadContentType = uploadContentType;}@Overridepublic String execute() throws Exception {    // 查询    String realPath = ServletActionContext.getServletContext().getRealPath(            "/upload");    // 路径    String targetPath = realPath + File.separator + uploadFileName;    // 开始上传    File targetFile = new File(targetPath);    FileUtils.copyFile(upload, targetFile);    return NONE;}

多文件上传

private File[] upload;private String[] uploadContentType;private String[] uploadFileName;// 查询String realPath = ServletActionContext.getServletContext().getRealPath("/upload");for (int i = 0; i < uploadFileName.length; i++) {    String targetPath = realPath + File.separator + uploadFileName[i];    File targetFile = new File(targetPath);    FileUtils.copyFile(upload[i], targetFile);        }ServletActionContext.getRequest().setAttribute("name", "上传成功");

案例