我要评论在新项目中使用的是springboot编写的api，涉及到ajax跨域请求和传输文件的问题，在这里记录一下
首先是前台页面的代码
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>test_api</title>
<script type="text/javascript" src="jquery-1.7.2.js"></script>
<script type="text/javascript">
function test(){
var obj = new object;
obj.name = $("#name").val();
obj.age = $("#age").val();
var file = document.getelementbyid("file").files[0];
var formdata = new formdata();
formdata.append("data",json.stringify(obj));
formdata.append("file",file);
$.ajax({
type:"post",
url:"http://localhost:8187/test/upload",
contenttype:false,
processdata:false,
data:formdata,
success:function(data){
alert(data.msg);
}
});
}
</script>
</head>
<body>
<div class="">
<table>
<tr>
<td>scompany:</td>
<td><input type="text" id="name" value="tom" /></td>
</tr>
<tr>
<td>scardtype:</td>
<td><input type="text" id="age" value="23" /></td>
</tr>
<tr>
<td>file:</td>
<td><input type="file" id="file" /></td>
</tr>
</table>
<input type="button" onclick="test();" value="提交" />
</div>
</body>
</html>
程序入口类的代码
package test;
import javax.servlet.multipartconfigelement;
import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.springbootapplication;
import org.springframework.boot.web.servlet.multipartconfigfactory;
import org.springframework.context.annotation.bean;
import org.springframework.web.servlet.config.annotation.corsregistry;
import org.springframework.web.servlet.config.annotation.webmvcconfigurer;
import org.springframework.web.servlet.config.annotation.webmvcconfigureradapter;
/**
* hello world!
*
*/
@springbootapplication
public class app
{
public static void main( string[] args )
{
springapplication.run(app.class, args);
}
//设置ajax跨域请求
@bean
public webmvcconfigurer corsconfigurer(){
return new webmvcconfigureradapter(){
@override
public void addcorsmappings(corsregistry registry) {
registry.addmapping("/**").allowedorigins("*");
}
};
}
@bean
public multipartconfigelement multipartconfigelement(){
multipartconfigfactory factory = new multipartconfigfactory();
//设置上传文件大小限制
factory.setmaxfilesize("10mb");
//设置上传总数据大小
factory.setmaxrequestsize("15mb");
return factory.createmultipartconfig();
}
}
api代码
package test.controller;
import java.io.bufferedoutputstream;
import java.io.file;
import java.io.fileoutputstream;
import java.util.hashmap;
import java.util.list;
import java.util.map;
import javax.servlet.http.httpservletrequest;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.requestmethod;
import org.springframework.web.bind.annotation.restcontroller;
import org.springframework.web.multipart.multipartfile;
import org.springframework.web.multipart.multiparthttpservletrequest;
import test.model.uploadinfo;
import com.alibaba.fastjson.json;
import com.alibaba.fastjson.jsonobject;
@restcontroller
@requestmapping("/test")
public class testcontroller {
/**
* 上传文件
* @param req form请求
* @return json字符串
*/
@requestmapping(value="/upload", method=requestmethod.post)
public string uploadfile(httpservletrequest req){
// 返回结果用 json对象
jsonobject returnobj = new jsonobject();
//从请求中获取请求的json字符串
string strdata = req.getparameter("data");
//将获取到的json字符串转换为imgidx对象
uploadinfo info = json.parseobject(strdata, uploadinfo.class);
//获取上传的文件集合
list<multipartfile> files = ((multiparthttpservletrequest)req).getfiles("file");
multipartfile file = files.get(0);
// 返回信息头部
map<string, string> header = new hashmap<string, string>();
header.put("code", "0");
header.put("msg", "success");
file file1234 = new file(file.getoriginalfilename());
//插入数据的影响的数据条数
int result = 0;
//将文件上传到save
if(!file.isempty()){
try{
byte[] arr = new byte[1024];
bufferedoutputstream bos = new bufferedoutputstream(new fileoutputstream(file1234));
bos.write(arr);
bos.flush();
bos.close();
}catch(exception e){
header.put("code", "-1");
header.put("msg", "errormsg:" + e.getmessage());
}
}else{
header.put("code", "-1");
header.put("msg", "errormsg:上传文件失败，因为文件是空的");
}
string returnstr = returnobj.tojsonstring(header);
return returnstr;
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持代码网。
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