SSH-BOS项目：重构BaseAction以及工具类抽取

重构后（请对照SSH-BOS项目：底层代码抽取(BaseDao、BaseAction)）：点击打开链接

package com.xushuai.bos.web.action;

import java.io.IOException;
import java.lang.reflect.ParameterizedType;
import java.util.List;

import javax.servlet.http.HttpServletResponse;

import org.hibernate.criterion.DetachedCriteria;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.xushuai.bos.utils.BOSUtils;
import com.xushuai.bos.utils.PageBean;

import net.sf.json.JSONObject;
import net.sf.json.JsonConfig;

public class BaseAction<T> extends ActionSupport implements ModelDriven<T> {

//↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓

protected PageBean pageBean = new PageBean();
protected DetachedCriteria criteria = null;

//接收分页参数
protected int page;
protected int rows;
//直接将接收到的参数赋给pageBean
public void setPage(int page) {
pageBean.setCurrentPage(page);
}
public void setRows(int rows) {
pageBean.setPageSize(rows);
}

//↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑
public final static String HOME = "home";
public final static String LIST = "list";

protected T model;
//获取运行时期实际类型，并对其进行实例化
public BaseAction() {
ParameterizedType type = (ParameterizedType) this.getClass().getGenericSuperclass();
Class entityClass = (Class) type.getActualTypeArguments()[0];

//↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
//对查询条件进行初始化,并赋给pageBean
criteria = DetachedCriteria.forClass(entityClass);
pageBean.setCriteria(criteria);
//↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑

try {
model = (T) entityClass.newInstance();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}

@Override
public T getModel() {
return model;
}

}

BOSUtils：

package com.xushuai.bos.utils;

import java.io.IOException;
import java.util.List;
import java.util.UUID;

import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts2.ServletActionContext;

import com.xushuai.bos.entity.User;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.JsonConfig;

public class BOSUtils {

/**
* 获取session对象
* @return
*/
public static HttpSession getSession(){
return ServletActionContext.getRequest().getSession();
}

/**
* 获取response对象
* @return
*/
public static HttpServletResponse getResponse(){
return ServletActionContext.getResponse();
}

/**
* 获取当前登录的用户
* @return
*/
public static User getLoginUser(){
return (User) getSession().getAttribute("user");
}

/**
* 生成32位uuid
* @return
*/
public static String uuid() {
return UUID.randomUUID().toString().replace("-", "").toUpperCase();
}

/**
* 将制定对象转换为json对象，并向页面回写
* @param o
* @param exclude
*/
public static void writerJson(Object o,String[] exclude){
HttpServletResponse response = getResponse();
response.setContentType("text/json;charset=UTF-8");
//将PageBean转换为JSON串，返回给页面
JsonConfig jsonConfig = new JsonConfig();
//去除不需要返回的值
jsonConfig.setExcludes(exclude);
//将查询结果转换为json串
String json = JSONObject.fromObject(o, jsonConfig).toString();
//返回json数据
try {
response.getWriter().print(json);
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 将指定的List转换
* @param list
* @param exclude
*/
public static void writerJson(List list,String[] exclude){
HttpServletResponse response = getResponse();
response.setContentType("text/json;charset=UTF-8");
//将PageBean转换为JSON串，返回给页面
JsonConfig jsonConfig = new JsonConfig();
//去除不需要返回的值
jsonConfig.setExcludes(exclude);
//将查询结果转换为json串
String json = JSONArray.fromObject(list, jsonConfig).toString();
//返回json数据
try {
response.getWriter().print(json);
} catch (IOException e) {
e.printStackTrace();
}
}

}