提供一个Struts2的Axtion基类

此基类最主要的功能是往前端传json数据,足够灵活,使用方便.源项目是用于easyui支持的.此代码也使我初步接触Struts2零配置的强大之处

这里致谢easyui中文社区论坛:http://bbs.jeasyuicn.com/ 提供的学习源码,及作者:孙宇

项目源码下载地址:http://pan.baidu.com/s/1o6kFgEY#dir/path=%2Fyu%E5%85%B1%E4%BA%AB%E6%96%87%E4%BB%B6%2FSSHE%E7%A4%BA%E4%BE%8B%E9%A1%B9%E7%9B%AE

package sy.action;import java.io.IOException;import java.util.Arrays;import java.util.List;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import org.apache.commons.lang3.StringUtils;import org.apache.commons.lang3.reflect.FieldUtils;import org.apache.log4j.Logger;import org.apache.struts2.ServletActionContext;import org.apache.struts2.convention.annotation.Action;import org.apache.struts2.convention.annotation.Namespace;import org.apache.struts2.convention.annotation.ParentPackage;import sy.model.easyui.Grid;import sy.model.easyui.Json;import sy.service.BaseServiceI;import sy.util.base.BeanUtils;import sy.util.base.FastjsonFilter;import sy.util.base.HqlFilter;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.serializer.SerializerFeature;import com.opensymphony.xwork2.ActionSupport;/** * 基础ACTION,其他ACTION继承此ACTION来获得writeJson和ActionSupport的功能 *  * 基本的CRUD已实现，子类继承BaseAction的时候，提供setService方法即可 *  * 注解@Action后，访问地址就是命名空间+类名(全小写，并且不包括Action后缀)，本action的访问地址就是/base.sy *  * @author 孙宇 *  */@ParentPackage("SyPackage")@Namespace("/")@Actionpublic class BaseAction<T> extends ActionSupport {private static final Logger logger = Logger.getLogger(BaseAction.class);protected int page = 1;// 当前页protected int rows = 10;// 每页显示记录数protected String sort;// 排序字段protected String order = "asc";// asc/descprotected String q;// easyui的combo和其子类过滤时使用protected String id;// 主键protected String ids;// 主键集合，逗号分割protected T data;// 数据模型(与前台表单name相同，name="data.xxx")protected BaseServiceI<T> service;// 业务逻辑/** * 继承BaseAction的action需要先设置这个方法，使其获得当前action的业务服务 *  * @param service */public void setService(BaseServiceI<T> service) {this.service = service;}public String getId() {return id;}public void setId(String id) {this.id = id;}public String getIds() {return ids;}public void setIds(String ids) {this.ids = ids;}public T getData() {return data;}public void setData(T data) {this.data = data;}public int getPage() {return page;}public void setPage(int page) {this.page = page;}public int getRows() {return rows;}public void setRows(int rows) {this.rows = rows;}public String getSort() {return sort;}public void setSort(String sort) {this.sort = sort;}public String getOrder() {return order;}public void setOrder(String order) {this.order = order;}public String getQ() {return q;}public void setQ(String q) {this.q = q;}/** * 将对象转换成JSON字符串，并响应回前台 *  * @param object * @param includesProperties *            需要转换的属性 * @param excludesProperties *            不需要转换的属性 */public void writeJsonByFilter(Object object, String[] includesProperties, String[] excludesProperties) {try {FastjsonFilter filter = new FastjsonFilter();// excludes优先于includesif (excludesProperties != null && excludesProperties.length > 0) {filter.getExcludes().addAll(Arrays.<String> asList(excludesProperties));}if (includesProperties != null && includesProperties.length > 0) {filter.getIncludes().addAll(Arrays.<String> asList(includesProperties));}logger.info("对象转JSON：要排除的属性[" + excludesProperties + "]要包含的属性[" + includesProperties + "]");String json;String User_Agent = getRequest().getHeader("User-Agent");if (StringUtils.indexOfIgnoreCase(User_Agent, "MSIE 6") > -1) {// 使用SerializerFeature.BrowserCompatible特性会把所有的中文都会序列化为\\uXXXX这种格式，字节数会多一些，但是能兼容IE6json = JSON.toJSONString(object, filter, SerializerFeature.WriteDateUseDateFormat, SerializerFeature.DisableCircularReferenceDetect, SerializerFeature.BrowserCompatible);} else {// 使用SerializerFeature.WriteDateUseDateFormat特性来序列化日期格式的类型为yyyy-MM-dd hh24:mi:ss// 使用SerializerFeature.DisableCircularReferenceDetect特性关闭引用检测和生成json = JSON.toJSONString(object, filter, SerializerFeature.WriteDateUseDateFormat, SerializerFeature.DisableCircularReferenceDetect);}logger.info("转换后的JSON字符串：" + json);getResponse().setContentType("text/html;charset=utf-8");getResponse().getWriter().write(json);getResponse().getWriter().flush();getResponse().getWriter().close();} catch (IOException e) {e.printStackTrace();}}/** * 将对象转换成JSON字符串，并响应回前台 *  * @param object * @throws IOException */public void writeJson(Object object) {writeJsonByFilter(object, null, null);}/** * 将对象转换成JSON字符串，并响应回前台 *  * @param object * @param includesProperties *            需要转换的属性 */public void writeJsonByIncludesProperties(Object object, String[] includesProperties) {writeJsonByFilter(object, includesProperties, null);}/** * 将对象转换成JSON字符串，并响应回前台 *  * @param object * @param excludesProperties *            不需要转换的属性 */public void writeJsonByExcludesProperties(Object object, String[] excludesProperties) {writeJsonByFilter(object, null, excludesProperties);}/** * 获得request *  * @return */public HttpServletRequest getRequest() {return ServletActionContext.getRequest();}/** * 获得response *  * @return */public HttpServletResponse getResponse() {return ServletActionContext.getResponse();}/** * 获得session *  * @return */public HttpSession getSession() {return ServletActionContext.getRequest().getSession();}/** * 获得一个对象 */public void getById() {if (!StringUtils.isBlank(id)) {writeJson(service.getById(id));} else {Json j = new Json();j.setMsg("主键不可为空！");writeJson(j);}}/** * 查找一批对象 */public void find() {HqlFilter hqlFilter = new HqlFilter(getRequest());writeJson(service.findByFilter(hqlFilter, page, rows));}/** * 查找所有对象 */public void findAll() {HqlFilter hqlFilter = new HqlFilter(getRequest());writeJson(service.findByFilter(hqlFilter));}/** * 查找分页后的grid */public void grid() {Grid grid = new Grid();HqlFilter hqlFilter = new HqlFilter(getRequest());grid.setTotal(service.countByFilter(hqlFilter));grid.setRows(service.findByFilter(hqlFilter, page, rows));writeJson(grid);}/** * 查找grid所有数据，不分页 */public void gridAll() {Grid grid = new Grid();HqlFilter hqlFilter = new HqlFilter(getRequest());List<T> l = service.findByFilter(hqlFilter);grid.setTotal((long) l.size());grid.setRows(l);writeJson(grid);}/** * 获得treeGrid，treeGrid由于提供了pid的扩展，所以不分页 */public void treeGrid() {HqlFilter hqlFilter = new HqlFilter(getRequest());writeJson(service.findByFilter(hqlFilter));}/** * 保存一个对象 */public void save() {Json json = new Json();if (data != null) {service.save(data);json.setSuccess(true);json.setMsg("新建成功！");}writeJson(json);}/** * 更新一个对象 */public void update() {Json json = new Json();String reflectId = null;try {if (data != null) {reflectId = (String) FieldUtils.readField(data, "id", true);}} catch (IllegalAccessException e) {e.printStackTrace();}if (!StringUtils.isBlank(reflectId)) {T t = service.getById(reflectId);BeanUtils.copyNotNullProperties(data, t, new String[] { "createdatetime" });service.update(t);json.setSuccess(true);json.setMsg("更新成功！");}writeJson(json);}/** * 删除一个对象 */public void delete() {Json json = new Json();if (!StringUtils.isBlank(id)) {T t = service.getById(id);service.delete(t);json.setSuccess(true);json.setMsg("删除成功！");}writeJson(json);}}