{"id":302284,"date":"2024-05-20T18:31:11","date_gmt":"2024-05-20T10:31:11","guid":{"rendered":""},"modified":"2024-05-20T18:31:21","modified_gmt":"2024-05-20T10:31:21","slug":"java-%e9%a1%b9%e7%9b%ae%e4%b8%ad%e5%a6%82%e4%bd%95%e8%af%bb%e5%8f%96%e5%92%8c%e5%86%99%e5%85%a5-csv-%e6%96%87%e4%bb%b6-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/302284.html","title":{"rendered":"java \u9879\u76ee\u4e2d\u5982\u4f55\u8bfb\u53d6\u548c\u5199\u5165 CSV \u6587\u4ef6"},"content":{"rendered":"

\"java<\/p>\n

\u5728Java\u9879\u76ee\u4e2d\uff0c\u8bfb\u53d6\u548c\u5199\u5165CSV\u6587\u4ef6\u662f\u4e00\u79cd\u5e38\u89c1\u9700\u6c42\uff0c\u4e3b\u8981\u7528\u4e8e\u6570\u636e\u7684\u5bfc\u5165\u5bfc\u51fa\u3001\u62a5\u8868\u751f\u6210\u7b49\u573a\u666f\u3002\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\u3001Java\u81ea\u5e26\u7684File\u7c7b\uff0c\u4ee5\u53ca\u73b0\u4ee3Java I\/O\u5e93\uff08\u5982NIO\uff09\u6765\u5b9e\u73b0<\/strong>\u3002\u5177\u4f53\u9009\u62e9\u54ea\u79cd\u65b9\u5f0f\uff0c\u53d6\u51b3\u4e8e\u9879\u76ee\u7684\u5177\u4f53\u9700\u6c42\u3001\u5f00\u53d1\u56e2\u961f\u7684\u719f\u6089\u7a0b\u5ea6\u4ee5\u53ca\u5bf9\u6027\u80fd\u7684\u8003\u8651\u3002<\/p>\n<\/p>\n

\u5728\u4f17\u591a\u65b9\u6cd5\u4e2d\uff0c\u4f7f\u7528Apache Commons CSV\u5e93\u662f\u6700\u53d7\u6b22\u8fce\u7684\u4e00\u79cd\u65b9\u5f0f\uff0c\u56e0\u4e3a\u5b83\u63d0\u4f9b\u4e86\u7b80\u5355\u3001\u76f4\u89c2\u4e14\u529f\u80fd\u5f3a\u5927\u7684API\u6765\u5904\u7406CSV\u6587\u4ef6<\/strong>\u3002Apache Commons CSV\u5e93\u652f\u6301\u521b\u5efa\u3001\u89e3\u6790\u548c\u6253\u5370CSV\u683c\u5f0f\u7684\u6587\u4ef6\uff0c\u5b83\u65e8\u5728\u4f7f\u5de5\u4f5c\u66f4\u52a0\u65b9\u4fbf\u5feb\u6377\u3002<\/p>\n<\/p>\n

\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u6df1\u5165\u63a2\u8ba8\u51e0\u79cd\u5e38\u89c1\u7684\u8bfb\u53d6\u548c\u5199\u5165CSV\u6587\u4ef6\u7684\u65b9\u6cd5\uff0c\u5e76\u8be6\u7ec6\u4ecb\u7ecd\u5b83\u4eec\u7684\u5b9e\u73b0\u8fc7\u7a0b\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528Apache Commons CSV<\/h3>\n<\/p>\n

Apache Commons CSV\u5e93\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u6d01\u7684\u65b9\u5f0f\u6765\u8bfb\u53d6\u548c\u5199\u5165CSV\u6587\u4ef6\u3002\u5b83\u652f\u6301\u591a\u79cdCSV\u683c\u5f0f\uff0c\u5982Excel\u3001MySQL\u7b49\uff0c\u5e76\u5141\u8bb8\u81ea\u5b9a\u4e49\u5206\u9694\u7b26\u3001\u5f15\u53f7\u7b26\u7b49\u3002<\/p>\n<\/p>\n

1. \u5f15\u5165\u4f9d\u8d56<\/h4>\n<\/p>\n

\u9996\u5148\uff0c\u9700\u8981\u5728\u9879\u76ee\u7684pom.xml<\/code>\u6587\u4ef6\u4e2d\u6dfb\u52a0Apache Commons CSV\u7684\u4f9d\u8d56\uff1a<\/p>\n<\/p>\n

<dependency><\/p>\n
    <groupId>org.apache.commons<\/groupId><\/p>\n
    <artifactId>commons-csv<\/artifactId><\/p>\n
    <version>1.8<\/version><\/p>\n
<\/dependency><\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u8bfb\u53d6CSV\u6587\u4ef6<\/h4>\n<\/p>\n
\u4f7f\u7528Apache Commons CSV\u8bfb\u53d6CSV\u6587\u4ef6\u975e\u5e38\u76f4\u63a5\u3002\u9996\u5148\u521b\u5efa\u4e00\u4e2aCSVParser<\/code>\u5bf9\u8c61\uff0c\u7136\u540e\u9010\u884c\u904d\u5386\uff1a<\/p>\n<\/p>\n
import org.apache.commons.csv.CSVFormat;<\/p>\n
import org.apache.commons.csv.CSVParser;<\/p>\n
import org.apache.commons.csv.CSVRecord;<\/p>\n
InputStream in = Files.newInputStream(Paths.get("path\/to\/csv"));<\/p>\n
BufferedReader reader = new BufferedReader(new InputStreamReader(in));<\/p>\n
CSVParser parser = new CSVParser(reader, CSVFormat.DEFAULT.withFirstRecordAsHeader().withIgnoreHeaderCase().withTrim());<\/p>\n
for (CSVRecord record : parser) {<\/p>\n
    String columnOne = record.get("Header1");<\/p>\n
    \/\/ \u5904\u7406\u6bcf\u4e00\u884c\u7684\u6570\u636e<\/p>\n
}<\/p>\n
parser.close();<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528Java I\/O<\/h3>\n<\/p>\n
\u5982\u679c\u4e0d\u60f3\u5f15\u5165\u989d\u5916\u7684\u4f9d\u8d56\uff0c\u53ef\u4ee5\u4f7f\u7528Java\u81ea\u5e26\u7684I\/O\u5e93\u6765\u5b9e\u73b0CSV\u7684\u8bfb\u53d6\u548c\u5199\u5165\u3002<\/p>\n<\/p>\n
1. \u8bfb\u53d6CSV\u6587\u4ef6<\/h4>\n<\/p>\n
\u901a\u8fc7\u4f7f\u7528BufferedReader<\/code>\uff0c\u53ef\u4ee5\u9010\u884c\u8bfb\u53d6CSV\u6587\u4ef6\uff0c\u5e76\u4f7f\u7528\u5b57\u7b26\u4e32\u5206\u5272\u65b9\u6cd5\u6765\u89e3\u6790\u6bcf\u4e00\u884c\uff1a<\/p>\n<\/p>\n
BufferedReader br = new BufferedReader(new FileReader("path\/to\/csv"));<\/p>\n
String line;<\/p>\n
while ((line = br.readLine()) != null) {<\/p>\n
    String[] values = line.split(",");<\/p>\n
    \/\/ \u5904\u7406\u6bcf\u4e00\u884c\u7684\u6570\u636e<\/p>\n
}<\/p>\n
br.close();<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u5199\u5165CSV\u6587\u4ef6<\/h4>\n<\/p>\n
\u5199\u5165CSV\u6587\u4ef6\u540c\u6837\u7b80\u5355\uff0c\u53ef\u4ee5\u4f7f\u7528BufferedWriter<\/code>\u6765\u5b9e\u73b0\uff1a<\/p>\n<\/p>\n
BufferedWriter bw = new BufferedWriter(new FileWriter("path\/to\/output.csv"));<\/p>\n
\/\/ \u5199\u5165\u6807\u9898\u884c\uff0c\u5047\u8bbe\u662f "Header1,Header2"<\/p>\n
bw.write("Header1,Header2\\n");<\/p>\n
\/\/ \u5199\u5165\u6570\u636e\u884c<\/p>\n
bw.write("value1,value2\\n");<\/p>\n
bw.close();<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528Java NIO<\/h3>\n<\/p>\n
\u5bf9\u4e8e\u5927\u6587\u4ef6\u7684\u5904\u7406\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528Java\u7684NIO\u5e93\uff0c\u5b83\u63d0\u4f9b\u4e86\u66f4\u9ad8\u7684\u5904\u7406\u6548\u7387\u3002<\/p>\n<\/p>\n
1. \u8bfb\u53d6CSV\u6587\u4ef6<\/h4>\n<\/p>\n
\u4f7f\u7528Files<\/code>\u7c7b\u548cPaths<\/code>\u7c7b\u7ed3\u5408Stream API\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u8bfb\u53d6CSV\u6587\u4ef6\uff1a<\/p>\n<\/p>\n
Stream<String> lines = Files.lines(Paths.get("path\/to\/csv"));<\/p>\n
lines.forEach(line -> {<\/p>\n
    String[] values = line.split(",");<\/p>\n
    \/\/ \u5904\u7406\u6bcf\u4e00\u884c\u7684\u6570\u636e<\/p>\n
});<\/p>\n
lines.close();<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u5199\u5165CSV\u6587\u4ef6<\/h4>\n<\/p>\n
\u5229\u7528Files<\/code>\u7c7b\u548cPath<\/code>\uff0c\u53ef\u4ee5\u7b80\u5316\u5199\u5165\u64cd\u4f5c\uff1a<\/p>\n<\/p>\n
List<String> lines = Arrays.asList("Header1,Header2", "value1,value2");<\/p>\n
Path file = Paths.get("path\/to\/output.csv");<\/p>\n
Files.write(file, lines, Charset.forName("UTF-8"));<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u603b\u7ed3\u4e0e\u6700\u4f73\u5b9e\u8df5<\/h3>\n<\/p>\n
\u8bfb\u53d6\u548c\u5199\u5165CSV\u6587\u4ef6\u662f\u6570\u636e\u5904\u7406\u4e2d\u7684\u5e38\u89c1\u9700\u6c42\u3002Java\u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u5f0f\u6765\u5b9e\u73b0\u8fd9\u4e00\u9700\u6c42\uff0c\u5305\u62ec\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\u3001Java I\/O\u4ee5\u53caNIO<\/strong>\u3002\u5728\u9009\u62e9\u5b9e\u73b0\u65b9\u5f0f\u65f6\uff0c\u9700\u8981\u8003\u8651\u5230\u9879\u76ee\u7684\u5177\u4f53\u9700\u6c42\uff0c\u6bd4\u5982\u5bf9\u6027\u80fd\u7684\u8003\u8651\u3001\u5f00\u53d1\u5468\u671f\u7684\u8981\u6c42\u4ee5\u53ca\u56e2\u961f\u7684\u6280\u672f\u6808\u3002<\/p>\n<\/p>\n
\u5bf9\u4e8e\u5927\u90e8\u5206\u9700\u6c42\uff0c\u4f7f\u7528Apache Commons CSV\u662f\u4e00\u79cd\u65e2\u7b80\u5355\u53c8\u9ad8\u6548\u7684\u65b9\u6cd5<\/strong>\u3002\u5b83\u4e0d\u4ec5\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u529f\u80fd\uff0c\u8fd8\u80fd\u591f\u5904\u7406\u5404\u79cd\u590d\u6742\u7684CSV\u683c\u5f0f\u3002\u7136\u800c\uff0c\u5bf9\u4e8e\u9700\u8981\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u7684\u60c5\u51b5\uff0c\u4f7f\u7528Java NIO\u53ef\u80fd\u4f1a\u66f4\u5408\u9002\uff0c\u56e0\u4e3a\u5b83\u80fd\u591f\u63d0\u4f9b\u66f4\u9ad8\u7684\u6548\u7387\u548c\u66f4\u597d\u7684\u6027\u80fd\u3002<\/p>\n<\/p>\n
\u65e0\u8bba\u91c7\u7528\u54ea\u79cd\u65b9\u6cd5\uff0c\u91cd\u8981\u7684\u662f\u8981\u786e\u4fdd\u6570\u636e\u7684\u51c6\u786e\u6027\u548c\u5b89\u5168\u6027\u3002\u5728\u5b9e\u9645\u5f00\u53d1\u8fc7\u7a0b\u4e2d\uff0c\u5e94\u8be5\u91cd\u89c6\u6570\u636e\u9a8c\u8bc1\u548c\u9519\u8bef\u5904\u7406\uff0c\u786e\u4fdd\u5e94\u7528\u7a0b\u5e8f\u7684\u5065\u58ee\u6027\u548c\u7a33\u5b9a\u6027\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
\u5982\u4f55\u5728 java \u9879\u76ee\u4e2d\u8bfb\u53d6 CSV \u6587\u4ef6\uff1f<\/strong><\/p>\n
\u8981\u5728 java \u9879\u76ee\u4e2d\u8bfb\u53d6 CSV \u6587\u4ef6\uff0c\u53ef\u4ee5\u4f7f\u7528\u5982\u4e0b\u6b65\u9aa4\uff1a  <\/p>\n
    \n
  1. \u9996\u5148\uff0c\u6253\u5f00 CSV \u6587\u4ef6\u5e76\u521b\u5efa\u4e00\u4e2a BufferedReader<\/code> \u5bf9\u8c61\u3002<\/li>\n
  2. \u7136\u540e\uff0c\u4f7f\u7528 readLine()<\/code> \u65b9\u6cd5\u9010\u884c\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\u3002\u53ef\u4ee5\u4f7f\u7528 String[] values = line.split(",")<\/code> \u5c06\u6bcf\u4e00\u884c\u7684\u503c\u6309\u7167\u9017\u53f7\u5206\u9694\u5b58\u50a8\u5728\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\u4e2d\u3002<\/li>\n
  3. \u63a5\u4e0b\u6765\uff0c\u53ef\u4ee5\u6839\u636e\u9700\u8981\u5bf9\u8bfb\u53d6\u7684\u6bcf\u4e00\u884c\u8fdb\u884c\u5904\u7406\uff0c\u4f8b\u5982\u5c06\u6570\u636e\u5b58\u50a8\u5728\u5bf9\u8c61\u4e2d\u3001\u8fdb\u884c\u8ba1\u7b97\u7b49\u7b49\u3002<\/li>\n<\/ol>\n
    \u5982\u4f55\u5728 java \u9879\u76ee\u4e2d\u5199\u5165 CSV \u6587\u4ef6\uff1f<\/strong><\/p>\n
    \u5982\u679c\u60f3\u5728 java \u9879\u76ee\u4e2d\u5199\u5165 CSV \u6587\u4ef6\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u64cd\u4f5c\uff1a  <\/p>\n
      \n
    1. \u9996\u5148\uff0c\u521b\u5efa\u4e00\u4e2a BufferedWriter<\/code> \u5bf9\u8c61\uff0c\u5e76\u6253\u5f00\u60f3\u8981\u5199\u5165\u7684 CSV \u6587\u4ef6\u3002<\/li>\n
    2. \u7136\u540e\uff0c\u6309\u7167 CSV \u6587\u4ef6\u7684\u683c\u5f0f\uff0c\u5c06\u6570\u636e\u5199\u5165\u6587\u4ef6\u3002\u53ef\u4ee5\u4f7f\u7528 write()<\/code> \u65b9\u6cd5\u5c06\u6570\u636e\u5199\u5165\u6587\u4ef6\uff0c\u6bcf\u4e2a\u5b57\u6bb5\u4e4b\u95f4\u7528\u9017\u53f7\u5206\u9694\uff0c\u884c\u672b\u6362\u884c\u7b26\u3002<\/li>\n
    3. \u6700\u540e\uff0c\u5173\u95ed\u6587\u4ef6\uff0c\u786e\u4fdd\u6570\u636e\u5df2\u5199\u5165\u3002<\/li>\n<\/ol>\n
      \u6709\u6ca1\u6709 java \u5e93\u53ef\u4ee5\u7b80\u5316\u8bfb\u5199 CSV \u6587\u4ef6\u7684\u64cd\u4f5c\uff1f<\/strong><\/p>\n
      \u662f\u7684\uff0c\u6709\u4e00\u4e9b java \u5e93\u53ef\u4ee5\u7b80\u5316\u8bfb\u53d6\u548c\u5199\u5165 CSV \u6587\u4ef6\u7684\u64cd\u4f5c\uff0c\u4f8b\u5982 Apache Commons CSV \u548c OpenCSV\u3002\u8fd9\u4e9b\u5e93\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u7684 API\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u8fdb\u884c CSV \u6587\u4ef6\u7684\u8bfb\u5199\u64cd\u4f5c\u3002\u4f7f\u7528\u8fd9\u4e9b\u5e93\uff0c\u4f60\u53ef\u4ee5\u66f4\u8f7b\u677e\u5730\u8bfb\u53d6 CSV \u6587\u4ef6\u7684\u5185\u5bb9\uff0c\u5e76\u5c06\u6570\u636e\u4ee5 CSV \u683c\u5f0f\u5199\u5165\u6587\u4ef6\u3002\u8fd9\u4f7f\u5f97\u5728 java \u9879\u76ee\u4e2d\u5904\u7406 CSV \u6587\u4ef6\u53d8\u5f97\u66f4\u52a0\u7b80\u5355\u548c\u9ad8\u6548\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Java\u9879\u76ee\u4e2d\uff0c\u8bfb\u53d6\u548c\u5199\u5165CSV\u6587\u4ef6\u662f\u4e00\u79cd\u5e38\u89c1\u9700\u6c42\uff0c\u4e3b\u8981\u7528\u4e8e\u6570\u636e\u7684\u5bfc\u5165\u5bfc\u51fa\u3001\u62a5\u8868\u751f\u6210\u7b49\u573a\u666f\u3002\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u7b2c\u4e09 […]","protected":false},"author":3,"featured_media":302298,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/302284"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=302284"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/302284\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/302298"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=302284"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=302284"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=302284"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}