& lt; The form id="addcourse_form" & gt; 
 
 
 
 
 
 
 
 
 
 
 <br/></div> <br/></div> <br/><Div & gt; <br/><Div & gt; <br/><The button type="submit" & gt; Acknowledge & lt;/button> <br/><The button type="reset" & gt; Heavy set & lt;/button> <br/></div> <br/></div> <br/></form> </pre> <br/><br/><span style="font - size: 13 px;"> <strong> js code, the two alert can pop up right </strong> </span> <br/><img SRC="https://img.codepudding.com/202010/150099190807121.jpg" Alt=""/> <img SRC=" https://img.codepudding.com/202010/150099190807122.jpg "Alt=" "/> <br/><pre> function addCourse () {<br/>//accept the front-end data (with the original js) <br/>Var data=https://bbs.csdn.net/topics/new FormData (document. GetElementById (" addcourse_form ")); <br/>Var name=$(" # addcourse_form input: eq (0) "). The val (); <br/>Var order=$(" # addcourse_form input: eq (1) "). The val (); <br/>Var picture=$(" # addcourse_form input: eq. (2) "). The val (); <br/>Var desc=$(" # addcourse_form textarea "). The val (); <br/>Alert (name + "" + order + +" "+" "+ picture desc); <br/>Alert (data. The get (" name ") + "" + data. The get (" picture") + "" + data. The get (" order") + "" + data. The get (" desc")); <br/>//send ajax asynchronous request <br/>$. Ajax ({<br/>Url: basePath + "course/addCourse", <br/>Type: "post", <br/>ProcessData: false, <br/>ContentType: false, <br/>Data: {<br/>"Name" : name, <br/>"Order" : order, <br/>"Picture" : picture, <br/>"Desc" : desc <br/>}, <br/>DataType: "json", <br/>Success: the function (result) {<br/>If (result. The status==1) {<br/>Alert (result. The message); <br/>} else if (result. The status==0) {<br/>Alert (" add course failure!!!!! "); <br/>} <br/>}, <br/>Error: function () {<br/>Alert (" attempt failed!!!!! "); <br/>} <br/>}); <br/>return false; <br/>} </pre> <br/><br/><span style="font - size: 13 px;"> <strong> back-end Controller code </strong> </span> <br/><pre> @ RequestMapping (value="https://bbs.csdn.net/topics/addCourse", method=RequestMethod. POST) <br/>@ ResponseBody <br/>Public Result addCourse (<br/>Course Course, <br/>String courseId, <br/>MultipartFile addFile, <br/>It request, <br/>HttpServletResponse response) {<br/>Result the Result=null; <br/>Result=this. CourseService. AddCourse (course, courseId, addFile, request, response); <br/>return result; <br/>} </pre> <br/><br/><span style="font - size: 13 px;"> <strong> Course entity class code, there is a setter and getter method </strong> </span> <br/><pre> private String id; <br/>private String name; <br/>Private String picture; <br/>Private Integer order; <br/>Private String desc; </pre> <br/><img SRC="https://img.codepudding.com/202010/150099190807123.jpg" Alt=""/><p class="article - content rp"> CodePudding user response: </p>In the Course before the Course add @ RequestBody <br/><br/><pre> <br/>@ RequestMapping (value="https://bbs.csdn.net/topics/addCourse", method=RequestMethod. POST) <br/>@ ResponseBody <br/>Public Result addCourse (<br/>@ RequestBody Course Course, <br/>String courseId, <br/>MultipartFile addFile, <br/>It request, <br/>HttpServletResponse response) {<br/>Result the Result=null; <br/>Result=this. CourseService. AddCourse (course, courseId, addFile, request, response); <br/>return result; <br/>} <br/></pre><p class="article - content rp"> CodePudding user response: </p>BasePath + "course/addCourse", the link address: are you sure is right???????<p class="article - content rp"> CodePudding user response: </p><fieldset> <legend> refer to the second floor weixin_40290083 response: <legend> <blockquote> basePath + "course/addCourse", the link address: are you sure is right??????? </blockquote> <fieldset> <br/>Breakpoints in the code... You this answer is a bit awkward <br/>Upstairs are supposed to be, but the original poster this code written more egg pain, courseId is used to do..<p class="article - content rp"> CodePudding user response: </p><fieldset> <legend> refer to the second floor weixin_40290083 response: <legend> <blockquote> basePath + "course/addCourse", the link address: are you sure is right??????? </blockquote> <fieldset> <br/>Sure is correct, the breakpoint is in<p class="article - content rp"> CodePudding user response: </p><fieldset> <legend> reference maradona1984 reply: 3/f <legend> <blockquote> <fieldset> <legend> Quote: refer to the second floor weixin_40290083 response: <legend> <blockquote> <br/>BasePath + "course/addCourse", the link address: are you sure is right??????? </blockquote> <fieldset> <br/>Breakpoints in the code... You this answer is a bit awkward <br/>Upstairs are supposed to be, but the original poster this code written more egg pain, courseId is used to do.. </blockquote> <fieldset> <br/>Because my courseId is behind UUID generated randomly<p class="article - content rp"> CodePudding user response: </p><fieldset> <legend> reference 1st floor BoRoBoRoMe response: <legend> <blockquote> in the Course before the Course add @ RequestBody <br/><br/><pre> <br/>nullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnull           </div>
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