Use ajax in Springmvc to get json data
Server side report: The software in your host has aborted an established connection.
Why nagging:
At first I thought that the computer problem was interrupted for no reason. I thought about it either as a database problem or as a server problem, and restarting eclipse or restarting the computer, but it was not solved. In addition, after debugging the breakpoint, I did not find any errors in the controller.
So after reading Baidu, you can still see a lot of analysis on this issue. After thinking about it specifically, I closed the page before a request was finished (closing here can also be understood as a jump), and it doesn't feel that it is not true. The request was written using ajax.
Then calm down, follow the previous habit of analyzing problems, start to recall, and think about what modifications I made to the code before and after the error. Final solution.
ajax code
function login() {
$.post({
// Which address to request
url : '',
// user_name=xxx&pwd=xxx
data : $('form').serialize(),
// After the sending is successful, the service receives normally and returns, it executes this method after it is executed
success : function(data) {
// result response content
if ( == 2) {
alert();
// Login successfully, jump
$(location).attr('href', '');
} else if ( == 1) {
alert("There is a problem with the username or password")
return false;
} else {
alert("Verification code error")
return false;
}
},
// Send failed, run error to execute this method
error : function(error) {
// error error description information
alert("error")
return false;
}
})
}
Original code:
<form action="#" method="post" οnsubmit="return login()">
Phone number: <input type="text" name="tel" /> <br /> Password: <input
type="password" name="pwd" /><br /> Verification code: <input type="text"
name="valiCode" /><span ></span><br /> <input
type="submit" value="submit" >
</form>
Modified code:
<form >
Phone number: <input type="text" name="tel" /> <br /> Password: <input
type="password" name="pwd" /><br /> Verification code: <input type="text"
name="valiCode" /><span ></span><br /> <input
type="button" value="submit" οnclick="login()">
Specific analysis:
From submit to button, my personal analysis is as follows: Since ajax is asynchronous, although the return method is used in the submitted form form, the form submission is controlled.
But asynchronous means asynchronous, resulting in the request not returning, so the action jump is started. Onsubmit returns in asynchronous has lost its effect.
This explains that the page has been closed before the request has ended, which means that a jump occurs, resulting in this error. I also explained the phenomenon here
When I breakpoint call to execute ajax access controller code, the code in the controller has not yet ended, and the error callback method of ajax in the front-end
Just execute. It can be seen that it is because the front-end jump occurs, causing the execution of the error callback in ajax, rather than the back-end.