打开PHP.ini，首先找到
file_uploads = on ;是否允许通过HTTP上传文件的开关。默认为ON即是开
upload_tmp_dir ;文件上传至服务器上存储临时文件的地方，如果没指定就会用系统默认的临时文件夹
upload_max_filesize = 8m ;望文生意，即允许上传文件大小的最大值。默认为2M
post_max_size = 8m ;指通过表单POST给PHP的所能接收的最大值，包括表单里的所有值。默认为8M
一般地，设置好上述四个参数后，上传<=8M的文件是不成问题，在网络正常的情况下。
但如果要上传>8M的大体积文件，只设置上述四项还一定能行的通。

进一步配置以下的参数
max_execution_time = 600 ;每个PHP页面运行的最大时间值(秒)，默认30秒
max_input_time = 600 ;每个PHP页面接收数据所需的最大时间，默认60秒
memory_limit = 8m ;每个PHP页面所吃掉的最大内存，默认8M
把上述参数修改后，在网络所允许的正常情况下，就可以上传大体积文件了
max_execution_time = 600
max_input_time = 600
memory_limit = 32m
file_uploads = on
upload_tmp_dir = /tmp
upload_max_filesize = 32m
post_max_size = 32m

packagecom.ilucky.ajaxfileupload;
1. importjava.io.File;
2. importjava.io.PrintWriter;
3. importjava.util.HashMap;
4. importjava.util.Map;
5. importjavax.servlet.http.HttpServletRequest;
6. importjavax.servlet.http.HttpServletResponse;
7. importorg.apache.log4j.Logger;
8. importorg.springframework.context.annotation.Scope;
9. importorg.springframework.stereotype.Controller;
10. importorg.springframework.web.bind.annotation.RequestMapping;
11. importorg.springframework.web.bind.annotation.RequestParam;
12. importorg.springframework.web.multipart.MultipartFile;
13. importcom.alibaba.fastjson.JSON;
14. /**
15. *注意:
16. *1.如果从前台传到后台的数据出现中文乱码,在web.xml文件中配置字符集过滤器.
17. *2.如果从后台传到前台的数据出现中文乱码,为response设置编码方式.
18. *@authorIluckySi
19. *@since20150213
20. */
21. @Controller("uploadFileController")
22. @Scope("prototype")
23. @RequestMapping("/uploadFileController")
24. publicclassUploadFileController{
25. privatestaticLoggerlogger=Logger.getLogger(UploadFileController.class);
26. @RequestMapping("/ajaxfileupload")
27. voidajaxfileupload(HttpServletRequestrequest,HttpServletResponseresponse,
28. @RequestParam(value="username",required=true)Stringusername,
29. @RequestParam(value="password",153); font-weight:bold; background-color:inherit">true)Stringpassword,100); background-color:inherit">@RequestParam(value="photo",153); font-weight:bold; background-color:inherit">true)MultipartFilephoto){
30. logger.info("后台收到参数:username="+username+",password="+password+
31. ",photo="+photo.getOriginalFilename());
32. response.setCharacterEncoding("utf-8");
33. PrintWriterpw=null;
34. Map<String,String>result=newHashMap<String,String>();
35. StringimagePath=request.getSession().getServletContext().getRealPath("/");
36. StringimageName="image/"+photo.getOriginalFilename().replace("","");
37. try{
38. *模拟位置1:前台error方法.
39. *模拟代码:intj=2/0;
40. */
41. pw=response.getWriter();
42. /**
43. *模拟位置2:前台success方法.
44. *模拟代码:intj=2/0;
45. if(photo.getSize()>0){
46. photo.transferTo(newFile(imagePath+imageName));
47. logger.info("存储图片成功:"+photo.getOriginalFilename());
48. }
49. result.put("result","success");
50. result.put("message","存储图片成功！");
51. }catch(Exceptione){
52. logger.error("存储图片失败:"+e);
53. "failure");
54. "存储图片失败！");
55. finally{
56. pw.print(JSON.toJSONString(result));
57. }
58. @RequestMapping("/ajaxfileupload2")
59. voidajaxfileupload2(HttpServletRequestrequest,153); font-weight:bold; background-color:inherit">true)MultipartFile[]photo){
60. +photo.length);
61. try{
62. pw=response.getWriter();
63. for(inti=0;i<photo.length;i++){
64. MultipartFilep=photo[i];
65. if(p.getSize()>0){
66. StringimageName="image/"+p.getOriginalFilename().replace("","");
67. p.transferTo( logger.info("存储图片成功:"+p.getOriginalFilename());
68. result.put("result","success");
69. result.put("message","存储图片成功！");
70. }catch(Exceptione){
71. logger.error("存储图片失败:"+e);
72. "failure");
73. "存储图片失败！");
74. finally{
75. pw.print(JSON.toJSONString(result));
76. @RequestMapping("/ajaxfileupload3")
77. voidajaxfileupload3(HttpServletRequestrequest,153); font-weight:bold; background-color:inherit">true)MultipartFilephoto){
78. logger.info("后台收到参数:username="+username+",password="+password+
79. ",photo="+photo.getOriginalFilename());
80. response.setCharacterEncoding("utf-8");
81. PrintWriterpw=null;
82. Map<String,String>();
83. StringimagePath=request.getSession().getServletContext().getRealPath("/");
84. StringimageName="image/"+photo.getOriginalFilename().replace("",108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> photo.transferTo(newFile(imagePath+imageName));
85. logger.info("存储图片成功:"+photo.getOriginalFilename());
86. @RequestMapping("/ajaxfileupload4")
87. voidajaxfileupload4(HttpServletRequestrequest,100); background-color:inherit">@RequestMapping("/ajaxfileupload5")
88. voidajaxfileupload5(HttpServletRequestrequest,248)"> }