2014java基础笔记
String.split(".")为null问题
获取3位数字，前面补零
int youNumber = 1;
// 0 代表前面补充0
// 3 代表长度为3
// d 代表参数为正数型
String str = String.format("%03d", youNumber);
System.out.println(str); // 0001
<h2>数字格式化</h2><p>java.text.NumberFormat</p><p>示例：</p><p>NumberFormat NumFmt = NumberFormat.getInstance();</p><p>NumFmt.setMaximumFractionDigits(0);</p><p>NumFmt.setMinimumIntegerDigits(2);</p><p>System.<span style="color:rgb(0,0,192);">out</span>.println(NumFmt.format(80934.234));<span style="color:rgb(63,127,95);">//80,934</span></p>
将前台JSON对象发送给后台
页面js：
XControl.ruleGroup.rules = {
id:4,
officeId:"can911",
airCode:"cx",
channels:[{
channel: 'User list',
groupId: 4,
rules: [
{id: 1, channel: 'Anne'},
{id: 2, channel: 'Amelie'}
]},{
channel: 'User list',
groupId: 4,
rules: [
{id: 1, channel: 'Anne'},
{id: 2, channel: 'Amelie'}
]}]};
//将JSON数组格式化，这一步是必要的
var xControlVO = JSON.stringify(XControl.ruleGroup.rules);
//特殊符号保存不了问题
var result = "";
for(var i=0;i<xControlVO.length;i++){
if(xControlVO.charAt(i)=="+"){
result += "%20";
}else if(xControlVO.charAt(i)=="/"){
result += "%2F";
}else if(xControlVO.charAt(i)=="?"){
result += "%3F";
}else if(xControlVO.charAt(i)=="%"){
result += "%25";
}else if(xControlVO.charAt(i)=="#"){
result += "%23";
}else if(xControlVO.charAt(i)=="&"){
result += "%26";
}else{
result += xControlVO.charAt(i);
};
}
//发送post请求
$.post("/iControl/Control/xControl/saveOrUpdate.action", { xControlVO:xControlVO }, function (data) {
alert(data);
});
后台：
利用jackson的ObjectMapper实现对象的转化
@Write(type = WriteType.JSON)
@Action(value = "saveOrUpdate")
public JSONObject saveOrUpdate(@Params(key="xControlVO") String xControlVO){
try {
ObjectMapper mapper = new ObjectMapper();
XControlVO vo = mapper.readValue(xControlVO,XControlVO.class);//转成map
xControlService.saveORupdate(vo);
}
catch (Exception e) {
e.printStackTrace();
}
return null;
}
js判断值是不是undefined
if (typeof(reValue) == "undefined") {
alert("undefined");
}
js克隆数组和对象
/**
* 克隆数组
*/
Utils.cloneArray = function(arrayObj) {
var array = new Array();
for (var i = 0, l = arrayObj.length; i < l; i++) {
array.push(Utils.cloneObj(arrayObj[i]));
}
return array;
}
/**
* 克隆对象
*/
Utils.cloneObj = function (obj) {
var objClone = null;
if (obj.constructor == Object) {
objClone = new obj.constructor();
}else {
objClone = new obj.constructor(obj.valueOf());
}
for (var key in obj) {
if (objClone[key] != obj[key]) {
if (typeof (obj[key]) == 'object') {
if (obj[key] instanceof Array) {
objClone[key] = Utils.cloneArray(obj[key]);
}else{
objClone[key] = Utils.cloneObj(obj[key]);
}
}else {
objClone[key] = obj[key];
}
}
}
objClone.toString = obj.toString;
objClone.valueOf = obj.valueOf;
return objClone;
}
监听Ctrl键按下释放：
$("body").keydown(function (event1) {
try {
var key = event1.which;
if (key == 17) {
//todo
}
}catch(err){}
});
$("body").bind('keyup',function (event) {
try {
var key = event.which;
if (key == 17) {
//todo
}
}catch(err){}
});
1、Oracle时间数据保存，后天看到只保存年月日，没有日分秒，因此排序的时候不能准确排序
解决：
1.1 数据库将该字段格式改为TimeStamp类型
1.2 @Temporal(TemporalType.TIMESTAMP)
@Column(name = "LAST_MODIFIED_TIME", length = 7)
public Date getLastModifiedTime() {
return this.lastModifiedTime;
}
public void setLastModifiedTime(Date lastModifiedTime) {
this.lastModifiedTime = lastModifiedTime;
}
2、String key=””; //拼接失败，此字符串为空或者空白不能拼接
for(String city:citys){
key.concat(city);
}
for(String date:dates){
key.concat(date);
}
key = key.concat(airCompany);
修改为：
StringBuffer sbf = new StringBuffer();// 拼接qte缓存的key
for (String tempCity : citys) {
sbf.append(tempCity);
}
for (String tempDate : dates) {
sbf.append(tempDate);
}
String key = sbf.toString();
key = key.concat(airCompany);
3、查询结果大小
BigDecimal rowCount = (BigDecimal) query.uniqueResult();
return rowCount.intValue();
代替：int size = query.list().size();
return size;
3、存储过程操作
public Long copyAirline(Long airLineId) {
Connection conn=null;
CallableStatement cstmt=null;
try {
JdbcTemplate jdbcTemplate=this.getJdbcTemplate();
conn=jdbcTemplate.getDataSource().getConnection();
String spName="{call sp_copy_policy_airline(?,?)}";
cstmt=conn.prepareCall(spName);
cstmt.setLong(1, airLineId);
cstmt.registerOutParameter(2, oracle.jdbc.OracleTypes.NUMBER);
cstmt.execute();
return cstmt.getLong(2);
} catch (Exception e) {
e.printStackTrace();
log.error(e, e);
}finally{
try {
if(conn!=null){
conn.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
return null;
}
存储SQL,复制存储过程思想，先将需要复制的数据copy到临时表，更新临时表的主键、外键及需要更新的信息，再将临时表数据插入原始表
create or replace
procedure sp_copy_policy_airline(airlineid in number,newairlineid out number) is
v_airlineid number;
Begin
v_airlineid :=SEQ_POLICY_AIRLINES.NEXTVAL;序列的下一个值
insert into IFL_POLICY_AIRLINES_COPY (select G.*,v_airlineid from IFL_POLICY_AIRLINES G where G.POLICY_AIRLINE_ID = airlineid);
commit;
--更新各表外键
update IFL_POLICY_AIR_PARTS_COPY COPYH set policy_airline_id = (select newId from IFL_POLICY_AIRLINES_COPY COPYG where COPYH.policy_airline_id =COPYG.policy_airline_id and rownum <= 1);
--更新各表主键
update IFL_POLICY_AIR_PARTS_COPY set AIR_PART_ID = newId;
--将复制表中的信息插入到原始表
insert into IFL_POLICY_AIRLINES (POLICY_AIRLINE_ID,AIRLINE_CODE,POLICY_ID,TAKEOFF_AIRPORTS,ARRIVE_AIRPORTS,FROM_IS_OJ,TO_IS_OJ,TIME_OFFSET,TCODE,
CLAUSE_ID,CLAUSE_CODE,ALLOW_STOPOVERS,STOPOVERS_TYPE,ALLOW_FLIGHT,NOT_ALLOW_FLIGHT,ALLOW_SHARE_FLIGHT,IS_MARRIAGE,GO_STOPOVERS_TIME,GO_STOPOVERS_FEES,
GO_STOPOVERS_FEES_UNIT,GO_FREE_STOPOVERS_TIME,BACK_STOPOVERS_TIME,BACK_STOPOVERS_FEES,BACK_STOPOVERS_FEES_UNIT,BACK_FREE_STOPOVERS_TIME,GO_ALLOW_TIME,
BACK_ALLOW_TIME,GO_NOT_ALLOW_TIME,BACK_NOT_ALLOW_TIME,TAKEOFF_AREA_TYPE,ARRIVE_AREA_TYPE,START_POINT_CODE,FINISH_POINT_CODE,AIRLINETYPE)
select POLICY_AIRLINE_ID,AIRLINE_CODE,POLICY_ID,TAKEOFF_AIRPORTS,ARRIVE_AIRPORTS,FROM_IS_OJ,TO_IS_OJ,TIME_OFFSET,TCODE,CLAUSE_ID,CLAUSE_CODE,
ALLOW_STOPOVERS,STOPOVERS_TYPE,ALLOW_FLIGHT,NOT_ALLOW_FLIGHT,ALLOW_SHARE_FLIGHT,IS_MARRIAGE,GO_STOPOVERS_TIME,GO_STOPOVERS_FEES,GO_STOPOVERS_FEES_UNIT,
GO_FREE_STOPOVERS_TIME,BACK_STOPOVERS_TIME,BACK_STOPOVERS_FEES,BACK_STOPOVERS_FEES_UNIT,BACK_FREE_STOPOVERS_TIME,GO_ALLOW_TIME,BACK_ALLOW_TIME,
GO_NOT_ALLOW_TIME,BACK_NOT_ALLOW_TIME,TAKEOFF_AREA_TYPE,ARRIVE_AREA_TYPE,START_POINT_CODE,FINISH_POINT_CODE,AIRLINETYPE from IFL_POLICY_AIRLINES_COPY;
update IFL_POLICY_FILES D set LAST_MODIFIED_TIME = SYSDATE() where D.policy_Id = (select G.policy_Id from IFL_POLICY_AIRLINES G where G.policy_airline_id = airlineid);
newairlineid := v_airlineid;
commit;
DELETE FROM IFL_POLICY_AIRLINES_COPY;
commit;
end;
4、Oracle 正则表达式函数-REGEXP_REPLACE
需要替换掉数据库LIMITE_INFORMATION字段字符串中的owPriceSource的值
{"stayTime1":"","stayTime2":"","owPriceSource":"1520","rtPriceSource":"2600"}
update IFL_POLICY_BUNKS set LIMITE_INFORMATION = regexp_replace(LIMITE_INFORMATION,'"owPriceSource"\s*:\s*"([^\\"]|[\\]["]|([\\][\\]))*"','"owPriceSource":"1234"') where POLICY_BUNK_ID in (:POLICY_BUNK_ID_PARAM)
解决session超时操作有误问题，设置成返回登录页面
//302表示session超时，退回登陆页面$.ajaxSetup({complete:function(xhr,textStatus){
if (xhr.status == 302) {
window.open(xhr.getResponseHeader("Location"));
}
}});
表单内容重复保存问题
<form id="priceId" method="post">initEvent:function(){
$("#priceId"). change(function() {
$("#priceId").data('changed', true);//from有修改，将状态设成true
});
}
if($("#priceId").data('changed')){
结束日期大于开始日期验证问题
endDate : {validator : function(val, param) {
var startDate = $(param[0]).val();
var endDate = $(param[1]).val();
var reg = /^(?:(?!0000)[0-9]{4}-(?:(?:0[1-9]|1[0-2])-(?:0[1-9]|1[0-9]|2[0-8])|(?:0[13-9]|1[0-2])-(?:29|30)|(?:0[13578]|1[02])-31)|(?:[0-9]{2}(?:0[48]|[2468][048]|[13579][26])|(?:0[48]|[2468][048]|[13579][26])00)-02-29)$/; //日期验证
if(reg.test(endDate)){
endDate = endDate.replace("-", "");
endDate = endDate.replace("-", "");
startDate = startDate.replace("-", "");
startDate = startDate.replace("-", "");
return parseInt(endDate) >= parseInt(startDate);
}else return false;
},
message : "格式不正确、结束日期应应>=开始日期"
},
复制页面不能弹出窗口
var newwindow=window.open("about:blank");//先打开一个空白页，在填充$.getJSON("/iPolicy/policy/extrapart/saveCopyExtraPartById.action",{extraPartId:selectedId},function(data){
policyTable.reload();
selectedId = data.id;
var url = "edit.html?extraPartId=" + selectedId+"&title=f";
newwindow.location.href=url;
newwindow.focus();
return false;
});
防止表单重复提交，思想：提交的时候放入变量，成功的时候去除
success : function(data) {$this.data("submiting",false);
if (options.onsuccess) {
options.onsuccess(data);
}
}
$this.submit(function() {
if($this.data("submiting")){
return false;
}
$this.data("submiting",true);
}
文本框或输入框细节，鼠标离开显示”审核通过“，点击消失
onFocus="if(this.value=='审核通过'){this.value=''}"onBlur="if(this.value==''){this.value='审核通过''}"
列表字段过长，隐藏过长部分，鼠标经过显示全部
startAreaCode=startAreaCode.length>20?startAreaCode.substring(0,20)+"...":startAreaCode;
"<td title='"+titleEndAreaCode+"'>到达地："+endAreaCode+"</td>"