「javadbx」javadb下载最新版本官网
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本文目录一览：
- 1、再次求java 键盘事件问题 KeyListener
- 2、java设置servletoutputstream的文件名字
- 3、dbx的详细资料
- 4、再java 中如何读取S7 300 中的 DB900.DBD4
再次求java 键盘事件问题 KeyListener
一个事件源，多个监听器。这么做比较容易解决。你给事件源添加两次监听器，两个不同的监听器。
java设置servletoutputstream的文件名字
1. 核心代码
//设置Mime-Type
response.setContentType("application/msword");
//设置下载默认文件名
response.setHeader("Content-Disposition", "attachment;filename=123.doc");
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完整代码
public RObject download(@PathVariable String id, HttpServletResponse response) {
File uploadFile = new File(id + ".doc");
//获取后缀名
String suffix = uploadFile.substring(uploadFile.lastIndexOf("."));
String responseType = ResponseTypeUtils.getResponseContentByType(suffix);
response.setContentType(responseType);
response.setHeader("Content-Disposition", "attachment;filename=" + System.currentTimeMillis() + suffix);
//输入流,通过输入流读取文件内容
try (FileInputStream fileInputStream = new FileInputStream(uploadFile)) {
ServletOutputStream outputStream = response.getOutputStream();
int len;
byte[] bytes = new byte[1024];
while ((len = fileInputStream.read(bytes)) != -1) {
outputStream.write(bytes, 0, len);
//刷新一下
outputStream.flush();
}
//关闭资源
outputStream.close();
return R.ok();
} catch (Exception e) {
throw new RuntimeException(e.getMessage(), e);
}
}
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当然也可以通过NIO的方式实现代码，具体可参见HttpServletResponse 返回图片的几种方法对比，核心代码如下：
fis.getChannel().transferTo(0,fis.available(),Channels.newChannel(response.getOutputStream()));
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3 参考状态码
文件扩展名 Content-Type(Mime-Type) 文件扩展名 Content-Type(Mime-Type)
.*（ 二进制流，不知道下载文件类型） application/octet-stream .tif image/tiff
.001 application/x-001 .301 application/x-301
.323 text/h323 .906 application/x-906
.907 drawing/907 .a11 application/x-a11
.acp audio/x-mei-aac .ai application/postscript
.aif audio/aiff .aifc audio/aiff
.aiff audio/aiff .anv application/x-anv
.asa text/asa .asf video/x-ms-asf
.asp text/asp .asx video/x-ms-asf
.au audio/basic .avi video/avi
.awf application/vnd.adobe.workflow .biz text/xml
.bmp application/x-bmp .bot application/x-bot
.c4t application/x-c4t .c90 application/x-c90
.cal application/x-cals .cat application/vnd.ms-pki.seccat
.cdf application/x-netcdf .cdr application/x-cdr
.cel application/x-cel .cer application/x-x509-ca-cert
.cg4 application/x-g4 .cgm application/x-cgm
.cit application/x-cit .class java/*
.cml text/xml .cmp application/x-cmp
.cmx application/x-cmx .cot application/x-cot
.crl application/pkix-crl .crt application/x-x509-ca-cert
.csi application/x-csi .css text/css
.cut application/x-cut .dbf application/x-dbf
.dbm application/x-dbm .dbx application/x-dbx
.dcd text/xml .dcx application/x-dcx
.der application/x-x509-ca-cert .dgn application/x-dgn
.dib application/x-dib .dll application/x-msdownload
.doc application/msword .dot application/msword
.docx application/msword .xlsx application/vnd.ms-excel
.drw application/x-drw .dtd text/xml
.dwf Model/vnd.dwf .dwf application/x-dwf
.dwg application/x-dwg .dxb application/x-dxb
.dxf application/x-dxf .edn application/vnd.adobe.edn
.emf application/x-emf .eml message/rfc822
.ent text/xml .epi application/x-epi
.eps application/x-ps .eps application/postscript
.etd application/x-ebx .exe application/x-msdownload
.fax image/fax .fdf application/vnd.fdf
.fif application/fractals .fo text/xml
.frm application/x-frm .g4 application/x-g4
.gbr application/x-gbr .pptx application/vnd.ms-powerpoint
.gif image/gif .gl2 application/x-gl2
.gp4 application/x-gp4 .hgl application/x-hgl
.hmr application/x-hmr .hpg application/x-hpgl
.hpl application/x-hpl .hqx application/mac-binhex40
.hrf application/x-hrf .hta application/hta
.htc text/x-component .htm text/html
.html text/html .htt text/webviewhtml
.htx text/html .icb application/x-icb
.ico image/x-icon .ico application/x-ico
.iff application/x-iff .ig4 application/x-g4
.igs application/x-igs .iii application/x-iphone
.img application/x-img .ins application/x-internet-signup
.isp application/x-internet-signup .IVF video/x-ivf
.java java/* .jfif image/jpeg
.jpe image/jpeg .jpe application/x-jpe
.jpeg image/jpeg .jpg image/jpeg
.jpg application/x-jpg .js application/x-javascript
.jsp text/html .la1 audio/x-liquid-file
.lar application/x-laplayer-reg .latex application/x-latex
.lavs audio/x-liquid-secure .lbm application/x-lbm
.lmsff audio/x-la-lms .ls application/x-javascript
.ltr application/x-ltr .m1v video/x-mpeg
.m2v video/x-mpeg .m3u audio/mpegurl
.m4e video/mpeg4 .mac application/x-mac
.man application/x-troff-man .math text/xml
.mdb application/msaccess .mdb application/x-mdb
.mfp application/x-shockwave-flash .mht message/rfc822
.mhtml message/rfc822 .mi application/x-mi
.mid audio/mid .midi audio/mid
.mil application/x-mil .mml text/xml
.mnd audio/x-musicnet-download .mns audio/x-musicnet-stream
.mocha application/x-javascript .movie video/x-sgi-movie
.mp1 audio/mp1 .mp2 audio/mp2
.mp2v video/mpeg .mp3 audio/mp3
.mp4 video/mpeg4 .mpa video/x-mpg
.mpd application/vnd.ms-project .mpe video/x-mpeg
.mpeg video/mpg .mpg video/mpg
.mpga audio/rn-mpeg .mpp application/vnd.ms-project
.mps video/x-mpeg .mpt application/vnd.ms-project
.mpv video/mpg .mpv2 video/mpeg
.mpw application/vnd.ms-project .mpx application/vnd.ms-project
.mtx text/xml .mxp application/x-mmxp
.net image/pnetvue .nrf application/x-nrf
.nws message/rfc822 .odc text/x-ms-odc
.out application/x-out .p10 application/pkcs10
.p12 application/x-pkcs12 .p7b application/x-pkcs7-certificates
.p7c application/pkcs7-mime .p7m application/pkcs7-mime
.p7r application/x-pkcs7-certreqresp .p7s application/pkcs7-signature
.pc5 application/x-pc5 .pci application/x-pci
.pcl application/x-pcl .pcx application/x-pcx
.pdf application/pdf .pdf application/pdf
.pdx application/vnd.adobe.pdx .pfx application/x-pkcs12
.pgl application/x-pgl .pic application/x-pic
.pko application/vnd.ms-pki.pko .pl application/x-perl
.plg text/html .pls audio/scpls
.plt application/x-plt .png image/png
.png application/x-png .pot application/vnd.ms-powerpoint
.ppa application/vnd.ms-powerpoint .ppm application/x-ppm
.pps application/vnd.ms-powerpoint .ppt application/vnd.ms-powerpoint
.ppt application/x-ppt .pr application/x-pr
.prf application/pics-rules .prn application/x-prn
.prt application/x-prt .ps application/x-ps
.ps application/postscript .ptn application/x-ptn
.pwz application/vnd.ms-powerpoint .r3t text/vnd.rn-realtext3d
.ra audio/vnd.rn-realaudio .ram audio/x-pn-realaudio
.ras application/x-ras .rat application/rat-file
.rdf text/xml .rec application/vnd.rn-recording
.red application/x-red .rgb application/x-rgb
.rjs application/vnd.rn-realsystem-rjs .rjt application/vnd.rn-realsystem-rjt
.rlc application/x-rlc .rle application/x-rle
.rm application/vnd.rn-realmedia .rmf application/vnd.adobe.rmf
.rmi audio/mid .rmj application/vnd.rn-realsystem-rmj
.rmm audio/x-pn-realaudio .rmp application/vnd.rn-rn_music_package
.rms application/vnd.rn-realmedia-secure .rmvb application/vnd.rn-realmedia-vbr
.rmx application/vnd.rn-realsystem-rmx .rnx application/vnd.rn-realplayer
.rp image/vnd.rn-realpix .rpm audio/x-pn-realaudio-plugin
.rsml application/vnd.rn-rsml .rt text/vnd.rn-realtext
.rtf application/msword .rtf application/x-rtf
.rv video/vnd.rn-realvideo .sam application/x-sam
.sat application/x-sat .sdp application/sdp
.sdw application/x-sdw .sit application/x-stuffit
.slb application/x-slb .sld application/x-sld
.slk drawing/x-slk .smi application/smil
.smil application/smil .smk application/x-smk
.snd audio/basic .sol text/plain
.sor text/plain .spc application/x-pkcs7-certificates
.spl application/futuresplash .spp text/xml
.ssm application/streamingmedia .sst application/vnd.ms-pki.certstore
.stl application/vnd.ms-pki.stl .stm text/html
.sty application/x-sty .svg text/xml
.swf application/x-shockwave-flash .tdf application/x-tdf
.tg4 application/x-tg4 .tga application/x-tga
.tif image/tiff .tif application/x-tif
.tiff image/tiff .tld text/xml
.top drawing/x-top .torrent application/x-bittorrent
.tsd text/xml .txt text/plain
.uin application/x-icq .uls text/iuls
.vcf text/x-vcard .vda application/x-vda
.vdx application/vnd.visio .vml text/xml
.vpg application/x-vpeg005 .vsd application/vnd.visio
.vsd application/x-vsd .vss application/vnd.visio
.vst application/vnd.visio .vst application/x-vst
.vsw application/vnd.visio .vsx application/vnd.visio
.vtx application/vnd.visio .vxml text/xml
.wav audio/wav .wax audio/x-ms-wax
.wb1 application/x-wb1 .wb2 application/x-wb2
.wb3 application/x-wb3 .wbmp image/vnd.wap.wbmp
.wiz application/msword .wk3 application/x-wk3
.wk4 application/x-wk4 .wkq application/x-wkq
.wks application/x-wks .wm video/x-ms-wm
.wma audio/x-ms-wma .wmd application/x-ms-wmd
.wmf application/x-wmf .wml text/vnd.wap.wml
.wmv video/x-ms-wmv .wmx video/x-ms-wmx
.wmz application/x-ms-wmz .wp6 application/x-wp6
.wpd application/x-wpd .wpg application/x-wpg
.wpl application/vnd.ms-wpl .wq1 application/x-wq1
.wr1 application/x-wr1 .wri application/x-wri
.wrk application/x-wrk .ws application/x-ws
.ws2 application/x-ws .wsc text/scriptlet
.wsdl text/xml .wvx video/x-ms-wvx
.xdp application/vnd.adobe.xdp .xdr text/xml
.xfd application/vnd.adobe.xfd .xfdf application/vnd.adobe.xfdf
.xhtml text/html .xls application/vnd.ms-excel
.xls application/x-xls .xlw application/x-xlw
.xml text/xml .xpl audio/scpls
.xq text/xml .xql text/xml
.xquery text/xml .xsd text/xml
.xsl text/xml .xslt text/xml
.xwd application/x-xwd .x_b application/x-x_b
.sis application/vnd.symbian.install .sisx application/vnd.symbian.install
.x_t application/x-x_t .ipa application/vnd.iphone
.apk application/vnd.android.package-archive .xap application
dbx的详细资料
dbx(SUN studio)调试工具：在利用 dbx 对程序进行源代码级调试前，必须使用 -g 选项启动：dbx program_name加载要调试的程序，调试JAVA程序dbx program_name.class|.jar，可以指定进程ID来连接正在运行的进程进行调试。也可以在dbx运行时加载调试程序：(dbx)debug program_name运行调试程序：run [运行参数] 查看core文件：可以dbx program_name core，或者dbx - core，再使用where命令显示栈跟踪，找到崩溃位置设置断点：stop in 函数；stop at file：line ; 也可以先通过file file-name设置当前文件，list function查看源文件，确定要设置断点的行数。在C++中可以将关键字（inmember、inclass、infunction 或 inobject）在类，成员函数，对象中设置断点。stop change variable可设置当变量改变时停止。条件停止断点：stop cond condition。另外在动态库中可以在动态共享库的函数中以在程序启动时在链接的库中设置断点的同样方式来设置断点。列出所有断点：status 删除断点：delete 断点号单步执行：step、next,step 命令步入函数，而 next 命令步过函数。step up将一直执行，直至当前函数将控制返回调用它的函数为止。继续执行：cont查看调用栈：where 调用栈代表那些已被调用但尚未返回各自调用程序的所有当前活动例程。在栈中，函数及其参数按调用的顺序进行存放。栈跟踪显示程序流执行的停止位置以及执行如何到达此点。它提供程序状态的简明描述。检查变量：print 变量名 退出：quit连接已运行的进程：attach pid分离已连接的进程：detach pid查找符号：whereis symbol 打印指定符号所有具体值的列表要打印输出标识符的声明whatis对子进程使用运行时检查，可通过attach 子进程ID连接到子进程进行调试。要显示当前进程的所有线程信息：执行thread，切换到指定线程：thread thr_id信号处理：cont -sig signal将信号转发到进程；catch显示当前正在捕获的信号列表;ignore显示程序忽略信号列表shell方式切换：sh
再java 中如何读取S7 300 中的 DB900.DBD4
这是S7300时数据地址的一种格式.
DB数据块的地址表达方法是:数据块号.数据块长度.位(如果长度是X时)
数据块号如:DB10,DB100等
数据块长度如:位DBX,字节DBB0,字DBW0,双字DBD
DB10.DBX2.7表示 数块10的第2个字节的第7位
DB20.DBB30 表示 数块10的第30个字节
同理W和D都可以知道表示的是第N个字或第N个双字
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