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java类常用方法

    博客分类:
  • java
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---获取系统当前时间
DateUtil.getDateTimeHelper()


---表示字符串为空
引入包import com.cthq.crm.util.StringUtils;
---StringUtils.isEmpty(XXX)


---字符串串联
StringBuffer  String = new StringBuffer("");
串联方法:String.append("XXX");
StringBuffer类型转换为String类型:String.toString();


--字符串分割(java类和js中通用)
通过逗号分割字符串:
String a = "a,b,c";
//java类中                                                  
String arr[] = a.split(","); 用数据存储
使用数组arr时 : arr[0],arr[1].....
//在js中                 
var arr = a.split(","); //js中数组不用[]    
使用数组arr时 : arr[0],arr[1].....


---插入表
ICommonBean cb = new DefaultCommonBean("TH_PARTNER", "ROW_ID=?ROW_ID?");
cb.addRow();
cb.addValue("ROW_ID", find());  //rowI用find()方法自动生成
cb.addValue("PTNR_STATUS", "10470007");
cb.addValue("LAST_MODIFY_DATE",DateUtil.getDateTimeHelper());
insert(cb);  //插入数据

---修改表
ICommonBean cb = new DefaultCommonBean("TH_PARTNER", "ROW_ID=?ROW_ID?");
cb.addRow();
cb.addValue("PTNR_STATUS", "10470007");
cb.addValue("LAST_MODIFY_DATE",DateUtil.getDateTimeHelper());
cb.addCondition("ROW_ID",(String)map.get("ROW_ID")); //通过此条件插入
update(cb);  //修改数据


---Dao中打印sql语句
String sql = QueryParse.getInstance().parseSQL(sqlName,sqlMap);


---执行sql语句
ICommonBean cb = selectByDefineWithPrepared(sqlName,sqlMap);
ICommonBean cb = (ICommonBean) select(sql);
取总数: int count = cb.getInt(0,"total");   //sql中把要统计的属性重命名为total
取sql查出的值:cb.getString(0,"DOCUMENT_NAME")


public void updateMobileProDetail(Map map){
    String sql = QueryParse.getInstance().parseSQL("updateMobileProDetail", map);
    exeSql(sql);
}
// 执行sql
public void exeSql(String sql){
    super.execute(sql);
}


---赋值框架
BeanUtils.copyProperties(category, sForm);


---分页方法
//action
public ActionForward statisticsMain(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws Exception {
        int pageNo = getPageNo(request);
        int pageSize = getPageSize(request);
PageBean page = mobileNumResourcesService.getAllProLineInfo("selectAllProLineInfo",map,pageSize,pageNo);
        request.setAttribute("page", page);
}
//service中方法
    public  PageBean getAllProLineInfo(String sqlName,Map map,int pageSize,int pageNo)throws  Exception{
        List list = new ArrayList();
        String  sql = QueryParse.getInstance().parseSQL("selectAllProLineInfo", map);
        ICommonBean cb = mobileNumResourcesDao.getAllProLineInfo(sqlName, map,pageNo,pageSize );
        if (cb.getRows() > 0) {
            for (int i = 0; i < cb.getRows(); i++) {
                MobileResourcesVO vo = new MobileResourcesVO();
                vo.setNumbType(cb.getString(i, "numb_type"));
                vo.setRowId(cb.getString(i, "row_id"));
                list.add(vo);
            }
        }
        return new PageBean(pageSize, pageNo, cb.count(), list);
    }

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