the request was rejected because no multipart boundary was found
前端完整报错如下：
Could not parse multipart servlet request; nested exception is java.io.IOException: org.apache.tomcat.util.http.fileupload.FileUploadException: the request was rejected because no multipart boundary was found
前端使用React进行开发
分析：
由于后端设置的是multipart files，所以在前端要穿对应的格式，header中设置参数即可。
new 一个FormData对象，文件列表中的每个文件添加到formData 对象中，注意，文件列表中每个元素都是JS 的 File对象。
下图所示是浏览器控制台输出的File对象。
具体实现见代码示例。
解决方法如下：
let formData = new FormData();this.pictures.map((item)=>{formData.append("pictures", this.item);})// formData.append("content", e.content);// formData.append("issueTime", getNow("YYYY-mm-dd HH:MM"));// formData.append("issuer", store.getState());// formData.append("title", e.title);axios({url: "/api/newsInsert",method: "post",headers: {"Content-Type": "multipart/form-data",},params: {content: e.content,issueTime: getNow("YYYY-mm-dd HH:MM"),issuer: store.getState(),title: e.title,},data: formData,}).then((response) => {console.log(response.data);},(error) => {console.log(error);});
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