复制代码 代码如下:

$(document).ready(function(){


$(\"#precinct\").change(function(){
$(\"#ptype\").val(\"\");//重置所有
$(\"#stype\").html(\"\");
$(\"#stype\").append(\"<option value=\\\"\\\">--请选择--</option>\");
});

<span style=\"white-space:pre\"> </span>//监听专利类型change事件
$(\"#ptype\").change(function(){
var ptype = $(this);
var atype = $(this).val();//对象值
var pid = $(\"#precinct\").val();
if (!ptype.data(atype)) {//从缓存里拿到值得话不需要再和服务器交互
$.post(\"Main/PatentSubsidy/getSubsidy\",{askfor:atype,precinct:pid},function(json){//返回json对象
$(\"#stype\").html(\"\");//清空<span style=\"font-family: Arial, Helvetica, sans-serif;\">#stype</span>下拉框
for(var i=0;i<json.length;i++){
//添加一个
$(\"#stype\").append(\"<option value=\'\"+json[i].id+\"\'>\"+json[i].value+\"</option>\");
};
ptype.data(atype, json); //以#ptype的值为key加入到缓存
},\'json\');
}else{
var json = ptype.data(atype);//取缓存
$(\"#stype\").html(\"\");
for(var i=0;i<json.length;i++){
//添加一个
$(\"#stype\").append(\"<option value=\'\"+json[i].id+\"\'>\"+json[i].value+\"</option>\");
};
}
});

});

复制代码 代码如下:

public void getSubsidy(){
String askfor=null,precinct=null;
if(null!=getPara(\"askfor\")&&!\"\".equals(getPara(\"askfor\"))){
askfor=getPara(\"askfor\");
if(null!=getPara(\"precinct\")&&!\"\".equals(getPara(\"precinct\"))){
precinct=getPara(\"precinct\");
}
}else{
renderJson(\"[{\\\"id\\\":\\\"\\\",\\\"value\\\":\\\"--请选择--\\\"}]\");//传空值，返回
}
String sql = \"select s.id, s.subsidy_type, p.name from org_subsidy_flow s, tab_precinct p where s.enabled = \'true\' and p.status = \'1\' and s.patent_type = \'\" + askfor + \"\' and s.precinct = p.id\";
if(null!=precinct&&!\"\".equals(precinct)){
sql += \" and p.id = \"+precinct;
}
sql += \" order by p.id, s.id\";
List<Org_subsidy_flow> sf = Org_subsidy_flow.dao.find(sql);
if(sf.size()!=0){
StringBuffer buffer = new StringBuffer();
for(int i=0;i<sf.size();i++){
buffer.append(\"{\\\"id\\\" : \\\"\"+sf.get(i).getInt(\"id\")+\"\\\" , \\\"value\\\" : \\\"\"+sf.get(i).getStr(\"subsidy_type\")+\" -- \"+sf.get(i).getStr(\"name\")+\"\\\"},\");
}
if(buffer.length()!=0){
renderJson(\"[\"+buffer.substring(0, buffer.length()-1).toString()+\"]\");
}
}else{
renderJson(\"[{\\\"id\\\":\\\"\\\",\\\"value\\\":\\\"--请选择--\\\"}]\");
}
}