{"id":721,"date":"2023-01-09T12:32:56","date_gmt":"2023-09-25T22:37:23","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/opencsv%e7%9a%84csvreader%e5%92%8ccsvwriter%e7%a4%ba%e4%be%8b\/"},"modified":"2025-08-03T04:52:22","modified_gmt":"2025-08-02T20:52:22","slug":"opencsv%e7%9a%84csvreader%e5%92%8ccsvwriter%e7%a4%ba%e4%be%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/opencsv%e7%9a%84csvreader%e5%92%8ccsvwriter%e7%a4%ba%e4%be%8b\/","title":{"rendered":"OpenCSV\u6559\u7a0b\uff1aJava\u4e2dCSVReader\u4e0eCSVWriter\u4f7f\u7528\u6307\u5357\u53ca\u5b9e\u4f8b"},"content":{"rendered":"<h1>OpenCSV\u7684CSVReader\u548cCSVWriter\u793a\u4f8b\uff08\u7b2c1\u90e8\u5206\uff0c\u51712\u90e8\u5206\uff09<\/h1>\n<p>OpenCSV \u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u7684 Java CSV \u89e3\u6790\u5668\u3002\u4eca\u5929\u6211\u4eec\u5c06\u7814\u7a76\u4e00\u4e0b OpenCSV \u7684 CSV \u89e3\u6790\u793a\u4f8b\u3002<\/p>\n<h2>OpenCSV\u5f00\u6e90\u5e93<\/h2>\n<p>OpenCSV\u63d0\u4f9b\u4e86\u5927\u90e8\u5206CSV\u89e3\u6790\u7684\u57fa\u672c\u529f\u80fd\u3002OpenCSV\u66f4\u53d7\u6b22\u8fce\uff0c\u56e0\u4e3a\u5728Java\u4e2d\u6ca1\u6709\u5185\u7f6e\u7684CSV\u89e3\u6790\u5668\u3002OpenCSV CSV\u89e3\u6790\u5668\u7684\u4e00\u4e9b\u91cd\u8981\u7c7b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>CSVReader<\/strong>\uff1a\u8fd9\u662fOpenCSV\u4e2d\u6700\u91cd\u8981\u7684\u7c7b\u3002CSVReader\u7c7b\u7528\u4e8e\u89e3\u6790CSV\u6587\u4ef6\u3002\u6211\u4eec\u53ef\u4ee5\u9010\u884c\u89e3\u6790CSV\u6570\u636e\uff0c\u4e5f\u53ef\u4ee5\u4e00\u6b21\u6027\u8bfb\u53d6\u6240\u6709\u6570\u636e\u3002<\/li>\n<li><strong>CSVWriter<\/strong>\uff1aCSVWriter\u7c7b\u7528\u4e8e\u5c06CSV\u6570\u636e\u5199\u5165Writer\u5b9e\u73b0\u3002\u60a8\u53ef\u4ee5\u81ea\u5b9a\u4e49\u5206\u9694\u7b26\u548c\u5f15\u53f7\u3002<\/li>\n<li><strong>CsvToBean<\/strong>\uff1a\u5f53\u60a8\u60f3\u5c06CSV\u6570\u636e\u8f6c\u6362\u4e3aJava\u5bf9\u8c61\u65f6\u4f7f\u7528CsvToBean\u3002<\/li>\n<li><strong>BeanToCsv<\/strong>\uff1aBeanToCsv\u7528\u4e8e\u5c06Java\u5bf9\u8c61\u5bfc\u51fa\u4e3aCSV\u6587\u4ef6\u3002<\/li>\n<\/ul>\n<h3>OpenCSV Maven\u4f9d\u8d56<\/h3>\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bMaven\u4f9d\u8d56\u9879\u6dfb\u52a0OpenCSV jar\u5305\u3002<\/p>\n<pre class=\"post-pre\"><code>&lt;dependency&gt;\r\n\t&lt;groupId&gt;com.opencsv&lt;\/groupId&gt;\r\n\t&lt;artifactId&gt;opencsv&lt;\/artifactId&gt;\r\n\t&lt;version&gt;3.8&lt;\/version&gt;\r\n&lt;\/dependency&gt;\r\n<\/code><\/pre>\n<p>\u5728\u6211\u4eec\u5f00\u59cb\u67e5\u770b\u793a\u4f8b\u7a0b\u5e8f\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u6f14\u793a\u7528\u7684CSV\u6570\u636e\u548c\u76f8\u5e94\u7684Java Bean\u3002\u8fd9\u662f\u6211\u4eec\u7684\u793a\u4f8bCSV\u6587\u4ef6emps.csv\u3002<\/p>\n<pre class=\"post-pre\"><code>1,\u5f20\u4e09,20,\u4e2d\u56fd\r\n2,\u674e\u56db,40,\u7f8e\u56fd\r\n3,\u738b\u4e94,28,\u5fb7\u56fd\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u6211\u4eec\u7684Java bean\u7c7b\uff0c\u7528\u4e8e\u4fdd\u5b58CSV\u6570\u636e\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.csv.model;\r\n\r\npublic class Employee {\r\n\r\n\tprivate String id;\r\n\tprivate String name;\r\n\tprivate String age;\r\n\tprivate String country;\r\n\r\n\tpublic String getId() {\r\n\t\treturn id;\r\n\t}\r\n\r\n\tpublic void setId(String id) {\r\n\t\tthis.id = id;\r\n\t}\r\n\r\n\tpublic String getName() {\r\n\t\treturn name;\r\n\t}\r\n\r\n\tpublic void setName(String name) {\r\n\t\tthis.name = name;\r\n\t}\r\n\r\n\tpublic String getAge() {\r\n\t\treturn age;\r\n\t}\r\n\r\n\tpublic void setAge(String age) {\r\n\t\tthis.age = age;\r\n\t}\r\n\r\n\tpublic String getCountry() {\r\n\t\treturn country;\r\n\t}\r\n\r\n\tpublic void setCountry(String country) {\r\n\t\tthis.country = country;\r\n\t}\r\n\r\n\t@Override\r\n\tpublic String toString() {\r\n\t\treturn \"{\" + id + \"::\" + name + \"::\" + age + \"::\" + country + \"}\";\r\n\t}\r\n}\r\n<\/code><\/pre>\n<p>\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e9b\u5e38\u89c1\u7684CSV\u89e3\u6790\u548cCSV\u5199\u5165\u7684\u4f8b\u5b50\u3002<\/p>\n<h3>CSVReader\uff08CSV\u9605\u8bfb\u5668\uff09<\/h3>\n<p>\u6211\u4eec\u7b2c\u4e00\u4e2aCSVReader\u7684\u793a\u4f8b\u662f\u9010\u884c\u8bfb\u53d6CSV\u6587\u4ef6\uff0c\u7136\u540e\u5c06\u5176\u8f6c\u6362\u4e3a\u5458\u5de5\u5217\u8868\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.csv.opencsv.parser;\r\n\r\nimport java.io.FileReader;\r\nimport java.io.IOException;\r\nimport java.util.ArrayList;\r\nimport java.util.List;\r\n\r\nimport com.Olivia.csv.model.Employee;\r\nimport com.opencsv.CSVReader;\r\n\r\n\/**\r\n * OpenCSV CSVReader \u793a\u4f8b\uff0c\u9010\u884c\u8bfb\u53d6\r\n * \r\n * @author scdev\r\n *\r\n *\/\r\npublic class OpenCSVReaderLineByLineExample {\r\n\r\n\tpublic static void main(String[] args) throws IOException {\r\n\r\n\t\tCSVReader reader = new CSVReader(new FileReader(\"emps.csv\"), ',');\r\n\r\n\t\tList&lt;Employee&gt; emps = new ArrayList&lt;Employee&gt;();\r\n\r\n\t\t\/\/ \u9010\u884c\u8bfb\u53d6\r\n\t\tString[] record = null;\r\n\r\n\t\twhile ((record = reader.readNext()) != null) {\r\n\t\t\tEmployee emp = new Employee();\r\n\t\t\temp.setId(record[0]);\r\n\t\t\temp.setName(record[1]);\r\n\t\t\temp.setAge(record[2]);\r\n\t\t\temp.setCountry(record[3]);\r\n\t\t\temps.add(emp);\r\n\t\t}\r\n\r\n\t\tSystem.out.println(emps);\r\n\t\t\r\n\t\treader.close();\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0a\u7684CSVReader\u793a\u4f8b\u5f88\u5bb9\u6613\u7406\u89e3\u3002\u4e00\u4e2a\u91cd\u8981\u7684\u70b9\u662f\u5173\u95edCSVReader\u4ee5\u907f\u514d\u5185\u5b58\u6cc4\u6f0f\u3002\u6b64\u5916\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u6307\u5b9a\u5206\u9694\u7b26\u5b57\u7b26\uff0c\u4ee5\u9632\u4f60\u4f7f\u7528\u5176\u4ed6\u5b57\u7b26\u3002\u4e0b\u4e00\u4e2aCSVReader\u793a\u4f8b\u662f\u4f7f\u7528CSVReader\u7684readAll()\u65b9\u6cd5\u4e00\u6b21\u6027\u8bfb\u53d6\u6240\u6709\u6570\u636e\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.csv.opencsv.parser;\r\n\r\nimport java.io.FileReader;\r\nimport java.io.IOException;\r\nimport java.util.ArrayList;\r\nimport java.util.Iterator;\r\nimport java.util.List;\r\n\r\nimport com.Olivia.csv.model.Employee;\r\nimport com.opencsv.CSVReader;\r\n\r\n\/**\r\n * OpenCSV CSVReader \u793a\u4f8b\uff0c\u4e00\u6b21\u6027\u8bfb\u53d6\u6240\u6709\u6570\u636e\r\n * \r\n * @author scdev\r\n *\r\n *\/\r\npublic class OpenCSVReaderReadAllExample {\r\n\r\n\tpublic static void main(String[] args) throws IOException {\r\n\t\tCSVReader reader = new CSVReader(new FileReader(\"emps.csv\"), ',');\r\n\r\n\t\tList&lt;Employee&gt; emps = new ArrayList&lt;Employee&gt;();\r\n\r\n\t\tList&lt;String[]&gt; records = reader.readAll();\r\n\r\n\t\tIterator&lt;String[]&gt; iterator = records.iterator();\r\n\r\n\t\twhile (iterator.hasNext()) {\r\n\t\t\tString[] record = iterator.next();\r\n\t\t\tEmployee emp = new Employee();\r\n\t\t\temp.setId(record[0]);\r\n\t\t\temp.setName(record[1]);\r\n\t\t\temp.setAge(record[2]);\r\n\t\t\temp.setCountry(record[3]);\r\n\t\t\temps.add(emp);\r\n\t\t}\r\n\r\n\t\tSystem.out.println(emps);\r\n\r\n\t\treader.close();\r\n\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<h3>\u5c06CSV\u8f6c\u6362\u4e3aJava Bean<\/h3>\n<p>\u8fd9\u662f\u6587\u7ae0\u300aOpenCSV\u7684CSVReader\u548cCSVWriter\u793a\u4f8b\u300b\u7684\u7b2c2\u90e8\u5206\uff08\u51712\u90e8\u5206\uff09\u3002<\/p>\n<p>\u6211\u4eec\u5927\u591a\u6570\u65f6\u5019\u5e0c\u671b\u5c06CSV\u8f6c\u6362\u4e3aJava\u5bf9\u8c61\u3002\u5728\u8fd9\u4e9b\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528CsvToBean\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5c06\u6211\u4eec\u7684\u5458\u5de5CSV\u6587\u4ef6\u8f6c\u6362\u4e3a\u5458\u5de5\u5bf9\u8c61\u5217\u8868\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.csv.opencsv.parser;\r\n\r\nimport java.io.FileReader;\r\nimport java.io.IOException;\r\nimport java.util.List;\r\n\r\nimport com.Olivia.csv.model.Employee;\r\nimport com.opencsv.CSVReader;\r\nimport com.opencsv.bean.ColumnPositionMappingStrategy;\r\nimport com.opencsv.bean.CsvToBean;\r\nimport com.opencsv.bean.HeaderColumnNameMappingStrategy;\r\n\r\npublic class OpenCSVParseToBeanExample {\r\n\r\n\tpublic static void main(String[] args) throws IOException {\r\n\t\t\r\n\t\tCSVReader reader = new CSVReader(new FileReader(\"emps.csv\"), ',');\r\n\t\t\r\n\t\tColumnPositionMappingStrategy&lt;Employee&gt; beanStrategy = new ColumnPositionMappingStrategy&lt;Employee&gt;();\r\n\t\tbeanStrategy.setType(Employee.class);\r\n\t\tbeanStrategy.setColumnMapping(new String[] {\"id\",\"name\",\"age\",\"country\"});\r\n\t\t\r\n\t\tCsvToBean&lt;Employee&gt; csvToBean = new CsvToBean&lt;Employee&gt;();\r\n\t\t\r\n\t\tList&lt;Employee&gt; emps = csvToBean.parse(beanStrategy, reader);\r\n\t\t\r\n\t\tSystem.out.println(emps);\r\n\t\t\r\n\t}\r\n}<\/code><\/pre>\n<p>ColumnPositionMappingStrategy \u7528\u4e8e\u5c06 CSV \u6570\u636e\u884c\u7d22\u5f15\u6620\u5c04\u5230\u5458\u5de5\u5bf9\u8c61\u7684\u5b57\u6bb5\u4e0a\u3002\u6709\u65f6\u5019\u6211\u4eec\u7684 CSV \u6587\u4ef6\u8fd8\u5305\u542b\u6807\u9898\u6570\u636e\uff0c\u4f8b\u5982\u6211\u4eec\u53ef\u4ee5\u6709\u4ee5\u4e0b emps1.csv \u6587\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code>ID,NAME,age, country\r\n1,Pankaj Kumar,20,India\r\n2,David Dan,40,USA\r\n3,Lisa Ray,28,Germany<\/code><\/pre>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528HeaderColumnNameMappingStrategy\u4f5c\u4e3aMappingStrategy\u7684\u5b9e\u73b0\u3002\u4ee5\u4e0b\u662f\u5c55\u793aHeaderColumnNameMappingStrategy\u4f7f\u7528\u7684\u65b9\u6cd5\u3002<\/p>\n<pre class=\"post-pre\"><code>\/\/ \u4e3aCSVWriter\u793a\u4f8b\u6f14\u793a\u6570\u636e\u8fd4\u56deEmployee\u5217\u8868\r\npublic static List&lt;Employee&gt; parseCSVWithHeader() throws IOException {\r\n\tCSVReader reader = new CSVReader(new FileReader(\"emps1.csv\"), ',');\r\n\t\r\n\tHeaderColumnNameMappingStrategy&lt;Employee&gt; beanStrategy = new HeaderColumnNameMappingStrategy&lt;Employee&gt;();\r\n\tbeanStrategy.setType(Employee.class);\r\n\t\r\n\tCsvToBean&lt;Employee&gt; csvToBean = new CsvToBean&lt;Employee&gt;();\r\n\tList&lt;Employee&gt; emps = csvToBean.parse(beanStrategy, reader);\r\n\t\r\n\tSystem.out.println(emps);\r\n\treader.close();\r\n\t\r\n\treturn emps;\r\n}<\/code><\/pre>\n<h3>CSVWriter\u793a\u4f8b<\/h3>\n<p>\u8ba9\u6211\u4eec\u6765\u770b\u770bCSVWriter\u7684\u4f8b\u5b50\uff0c\u5c06Java\u5bf9\u8c61\u5199\u5165CSV\u6587\u4ef6\u3002\u6211\u4eec\u5c06\u91cd\u7528\u4e0a\u8ff0\u5b9a\u4e49\u7684parseCSVWithHeader()\u51fd\u6570\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.csv.opencsv.parser;\r\n\r\nimport java.io.IOException;\r\nimport java.io.StringWriter;\r\nimport java.util.ArrayList;\r\nimport java.util.Iterator;\r\nimport java.util.List;\r\n\r\nimport com.Olivia.csv.model.Employee;\r\nimport com.opencsv.CSVWriter;\r\n\r\npublic class OpenCSVWriterExample {\r\n\r\n\tpublic static void main(String[] args) throws IOException {\r\n\t\tStringWriter writer = new StringWriter();\r\n\t\t\r\n\t\t\/\/ \u4f7f\u7528\u81ea\u5b9a\u4e49\u5206\u9694\u7b26\u548c\u5f15\u53f7\u5b57\u7b26\r\n\t\tCSVWriter csvWriter = new CSVWriter(writer, '#', '\\'');\r\n\r\n\t\tList&lt;Employee&gt; emps = OpenCSVParseToBeanExample.parseCSVWithHeader();\r\n\r\n\t\tList&lt;String[]&gt; data = toStringArray(emps);\r\n\r\n\t\tcsvWriter.writeAll(data);\r\n\r\n\t\tcsvWriter.close();\r\n\t\t\r\n\t\tSystem.out.println(writer);\r\n\r\n\t}\r\n\r\n\tprivate static List&lt;String[]&gt; toStringArray(List&lt;Employee&gt; emps) {\r\n\t\tList&lt;String[]&gt; records = new ArrayList&lt;String[]&gt;();\r\n\r\n\t\t\/\/ \u6dfb\u52a0\u6807\u9898\u8bb0\u5f55\r\n\t\trecords.add(new String[] { \"ID\", \"Name\", \"Age\", \"Country\" });\r\n\r\n\t\tIterator&lt;Employee&gt; it = emps.iterator();\r\n\t\twhile (it.hasNext()) {\r\n\t\t\tEmployee emp = it.next();\r\n\t\t\trecords.add(new String[] { emp.getId(), emp.getName(), emp.getAge(), emp.getCountry() });\r\n\t\t}\r\n\t\treturn records;\r\n\t}\r\n\r\n}<\/code><\/pre>\n<p>\u6ce8\u610f\u5728\u5199\u5165CSV\u6570\u636e\u65f6\u4f7f\u7528\u81ea\u5b9a\u4e49\u5206\u9694\u7b26\u3002\u6211\u4eec\u8fd8\u6307\u5b9a\u4e86\u5728CSV\u5217\u4e2d\u4f7f\u7528\u7684\u5f15\u53f7\u5b57\u7b26\u3002\u4e0a\u9762\u7684CSVWriter\u793a\u4f8b\u4ea7\u751f\u4ee5\u4e0b\u8f93\u51fa\u3002<\/p>\n<pre class=\"post-pre\"><code>[{1::Pankaj Kumar::20::India}, {2::David Dan::40::USA}, {3::Lisa Ray::28::Germany}]\r\n'ID'#'Name'#'Age'#'Country'\r\n'1'#'Pankaj Kumar'#'20'#'India'\r\n'2'#'David Dan'#'40'#'USA'\r\n'3'#'Lisa Ray'#'28'#'Germany'<\/code><\/pre>\n<h3>OpenCSV\u7684CSVWriter\u4e0eResultSet<\/h3>\n<p>\u6709\u65f6\u5019\u6211\u4eec\u5e0c\u671b\u5c06\u6570\u636e\u5e93\u8868\u4e2d\u7684\u6570\u636e\u5bfc\u51fa\u4e3aCSV\u6587\u4ef6\u4f5c\u4e3a\u5907\u4efd\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528CSVWriter\u7684writeAll(ResultSet rs, boolean includeColumnNames)\u65b9\u6cd5\u8f7b\u677e\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002<\/p>\n<h3>OpenCSV \u6ce8\u89e3<\/h3>\n<p>OpenCSV\u8fd8\u63d0\u4f9b\u57fa\u4e8e\u6ce8\u89e3\u7684\u652f\u6301\u3002\u5176\u4e2d\u4e00\u4e9bOpenCSV\u7684\u6ce8\u89e3\u5305\u62ec\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>CsvBindByName: \u7528\u4e8e\u5c06CSV\u8f93\u5165\u7684\u5217\u540d\u4e0ebean\u4e2d\u7684\u5b57\u6bb5\u7ed1\u5b9a\u3002<\/li>\n<li>CsvBindByPosition: \u7528\u4e8e\u5c06CSV\u8f93\u5165\u7684\u5217\u53f7\u4e0ebean\u4e2d\u7684\u5b57\u6bb5\u7ed1\u5b9a\u3002<\/li>\n<li>CsvDate: \u7528\u4e8e\u57fa\u4e8e\u65f6\u95f4\u7684\u8f6c\u6362\u3002<\/li>\n<\/ul>\n<p>\u7136\u800c\uff0c\u6211\u4e0d\u60f3\u4f7f\u7528OpenCSV\u7684\u6ce8\u89e3\uff0c\u56e0\u4e3a\u90a3\u6837\u6211\u7684\u4ee3\u7801\u4f1a\u4e0eOpenCSV\u7d27\u5bc6\u8026\u5408\u3002\u8fd9\u5c31\u662f\u6709\u5173OpenCSV\u793a\u4f8b\u6559\u7a0b\u7684\u5168\u90e8\u5185\u5bb9\u3002\u53c2\u8003\uff1aOpenCSV\u5b98\u65b9\u9875\u9762\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>OpenCSV\u7684CSVReader\u548cCSVWriter\u793a\u4f8b\uff08\u7b2c1\u90e8\u5206\uff0c\u51712\u90e8\u5206\uff09 OpenCSV \u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7 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