ajax 跨域请求post请求,ajax POST跨域请求完美解决

方式：

js前端请求：

function getOcrInfo(imageData){

$.ajax({

url: 'http://localhost:8080/LSWS/ws/ocr/getWebImageRecognitionJsonStringByBase64Image',

type: 'post',

dataType:'json',

//async:false,

data: {

"imageData" : imageData

},

success:function(data){

if(data.flag==0){

var name=decodeURIComponent(data.name);

var position=decodeURIComponent(data.position);

}else{

FR.Msg.alert("错误提示","获取识别结果失败，请重试！");

}

},

error:function(data){

FR.Msg.alert("错误提示","获取识别结果失败，请重试！");

}

});

服务器后端：

@RequestMapping(value="/getWebImageRecognitionJsonStringByBase64Image", method = RequestMethod.POST)

@ResponseBody

public String getWebImageRecognitionJsonStringByBase64Image(HttpServletRequest request,HttpServletResponse response,String imageData) {

String result = "";

//System.out.println(imageData);

try{

WebImageRecognition gr = new WebImageRecognition();

result = gr.getWebImageRecognitionJsonObjectByBase64Image(imageData);

response.addHeader("Access-Control-Allow-Origin", "*");   //用于ajax post跨域(*，最好指定确定的http等协议+ip+端口号)

response.setCharacterEncoding("utf-8");

//response.getWriter().write(result);

//response.getWriter().close();

}catch(Exception e){

e.printStackTrace();

logger.error("getGeneralRecognition:"+e);

result = "{\"flag\":\"1\",\"errorMessage\":\"server change error at OcrController!\"}";

}

return result;

}