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<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="ht ...
public class PublishAction extends ActionSupport { private String msg; /** * @return the msg */ public String getMsg() { return msg; } /** * @param msg the msg to set */ public void setMsg(String msg) { this.msg = msg; ...
<servlet-name>dwr-invoker</servlet-name> <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class> <!-- This should NEVER be present in live --> <init-param> <param-name>debug</param-name> <param-value ...
<%@ page contentType="text/html;charset=utf-8" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <title ...
public class BaseAction extends ActionSupport { private static final long serialVersionUID = 4260238422873356334L; /** * 返回json数据 * @param object * @return */ public String jsonOut(Object object){ ObjectMapper objectMapper=new ObjectMapper(); ...

JPA主键生成策略

    博客分类:
  • java
  @GeneratedValue:主键的产生策略,通过strategy属性指定。   主键产生策略通过GenerationType来指定。GenerationType是一个枚举,它定义了主键产生策略的类型。   1、AUTO 自动选择一个最适合底层数据库的主键生成策略。如MySQL会自动对应auto increment。这个是默认选项,即如果只写@GeneratedValue,等价于@GeneratedValue(strategy=GenerationType.AUTO)。   2、IDENTITY 表自增长字段,Oracle不支持这种方式。   3、SEQUENCE 通过序列产生主键 ...
struts2默认使用json_lib传送数据 所需jar包如下: json-lib-2.1.jar struts2-json-plugin-2.1.8.1.jar commons-logging-1.0.4.jar <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://strut ...
struts2简单实现多文件上传,希望各位大侠多多指教
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