jQuery中ajax应用的一个实例（前端+controller）

页面的代码：

if(filesArray.length>0) { $.ajax({ type: "post", url: "****/****/sendFiles", //data:JSON.stringify(filesArray), data:{"filesArray":filesArray}, async: false, traditional: "true", dataType : "json", success: function(data) { //alert(data.code); if(data.code==100) { var info = data.extend;//可以通过extend中信息，详细展示controller中返回的结果

//返回信息的代码，略

alert("导入操作成功！");

}
else if(data.code==200)
{

var info = data.extend;//可以通过extend中信息，详细展示controller中返回的结果

//返回信息的代码，略

alert("导入失败！");

}

},
error: function (data) {

}
});
}
else
{
alert("There is not *** file witch is selected!")
}

注意：traditional: "true", 必须有！！

java端的代码：

首先，先创建一个单独的java类，存放返回给前端的结果信息：

public class ReturnMsg { private int code; //返回100表示成功,200表示失败 private String msg; //返回提示信息 private Map<String,Object> extend = new HashMap<String,Object>(); //用户返回给浏览器的数据 public static ReturnMsg success() { ReturnMsg result = new ReturnMsg(); result.setCode(100); result.setMsg("处理成功"); return result; } public static ReturnMsg fail() { ReturnMsg result = new ReturnMsg(); result.setCode(200); result.setMsg("处理失败"); return result; } public ReturnMsg add(Map<String,Object> info) { this.setExtend(info); return this; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } public int getCode() { return code; } public void setCode(int code) { this.code = code; } public Map<String,Object> getExtend() { return extend; } public void setExtend(Map<String,Object> extend) { this.extend = extend; } }

然后，在controller中创建相关函数，处理页面的请求

@RequestMapping({"sendFiles"}) @ResponseBody public ReturnMsg ImportSelectedCi(HttpServletRequest request, HttpServletResponse response,

@RequestParam String[] filesArray) throws IOException {

String CFilePath = "****************";
System.out.println(FilePath);
String importPath;

Map<String,Object> res_info = new HashMap<String,Object>();    //用户返回给浏览器的数据

if(null!=filesArray) {

for(int i=0;i<filesArray.length;i++){

importPath = CFilePath + filesArray[i];

try{

List<SmsGeoRegion> slist = new ArrayList<SmsGeoRegion>();

int result_int = cimeDao.readCFileByLines(importPath,slist);

if(result_int==0) {
//parsing info write into mysql
int ret = cimeDao.writeToMysql(slist);
String temp_key = "succ"+i;
//记录导入成功的文件
res_info.put(temp_key,filesArray[i]);

}
else{
System.out.println("There are errors when parsing C File!");
res_info.put("error2",filesArray[i]+"：c文件解析过程中出现问题！");
return ReturnMsg.fail().add(res_info);
}

}catch(Exception e){
//fail("Test file read failed!");
System.out.println("Test file read failed!");
res_info.put("error1",filesArray[i]+"：c文件读取失败！");

return ReturnMsg.fail().add(res_info);
}

}

return ReturnMsg.success().add(res_info);

}

res_info.put("error0","界面返回的c文件未找到！");
return ReturnMsg.fail().add(res_info);
}

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