java 文件上传到读取文件内容的实例

public string uploadfile() throws exception {

logger.info( "开始导入规则文件：" + fileinputfilename);

inputstream is = new fileinputstream(fileinput);

string uploadpath = servletactioncontext.getservletcontext()

.getrealpath( "/upload" );

system.out.println(uploadpath);

file targetfile = new file(uploadpath, this .getfileinputfilename());

outputstream os = new fileoutputstream(targetfile);

byte [] buffer = new byte [ 1024 ];

int length = 0 ;

while ((length = is.read(buffer)) > 0 ) {

os.write(buffer, 0 , length);

}

is.close();

os.close();

map<string, object> map = personalkpimonitormanualruleservice

.importrules(targetfile);

httpservletresponse response = servletactioncontext.getresponse();

response.setcontenttype( "text/html;charset=utf-8" );

printwriter out = response.getwriter();

out.println(jsonobject.fromobject(map));

// if(flag==true){

// logger.info("规则文件导入成功："+fileinputfilename);

// out.println("规则文件导入成功："+fileinputfilename);

// }else{

// logger.info("规则文件导入失败："+fileinputfilename);

// out.println("规则文件导入失败，详见日志："+fileinputfilename);

// }

out.flush();

out.close();

return null ;

}