在新項(xiàng)目中使用的是springboot編寫(xiě)的api，涉及到ajax跨域請(qǐng)求和傳輸文件的問(wèn)題，在這里記錄一下
首先是前臺(tái)頁(yè)面的代碼
!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>
程序入口類的代碼
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);
}
//設(shè)置ajax跨域請(qǐng)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();
//設(shè)置上傳文件大小限制
factory.setMaxFileSize("10MB");
//設(shè)置上傳總數(shù)據(jù)大小
factory.setMaxRequestSize("15MB");
return factory.createMultipartConfig();
}
}
api代碼
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 {
/**
* 上傳文件
* @param req form請(qǐng)求
* @return json字符串
*/
@RequestMapping(value="/upload", method=RequestMethod.POST)
public String uploadFile(HttpServletRequest req){
// 返回結(jié)果用 json對(duì)象
JSONObject returnObj = new JSONObject();
//從請(qǐng)求中獲取請(qǐng)求的json字符串
String strData = req.getParameter("data");
//將獲取到的JSON字符串轉(zhuǎn)換為Imgidx對(duì)象
UploadInfo info = JSON.parseObject(strData, UploadInfo.class);
//獲取上傳的文件集合
ListMultipartFile> files = ((MultipartHttpServletRequest)req).getFiles("file");
MultipartFile file = files.get(0);
// 返回信息頭部
MapString, String> header = new HashMapString, String>();
header.put("code", "0");
header.put("msg", "success");
File file1234 = new File(file.getOriginalFilename());
//插入數(shù)據(jù)的影響的數(shù)據(jù)條數(shù)
int result = 0;
//將文件上傳到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:上傳文件失敗，因?yàn)槲募强盏?);
}
String returnStr = returnObj.toJSONString(header);
return returnStr;
}
}
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