{"id":262,"date":"2022-11-04T15:26:50","date_gmt":"2023-05-15T21:00:07","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/java-sax-%e8%a7%a3%e6%9e%90%e5%99%a8%e7%a4%ba%e4%be%8b\/"},"modified":"2025-08-01T03:04:44","modified_gmt":"2025-07-31T19:04:44","slug":"java-sax-%e8%a7%a3%e6%9e%90%e5%99%a8%e7%a4%ba%e4%be%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java-sax-%e8%a7%a3%e6%9e%90%e5%99%a8%e7%a4%ba%e4%be%8b\/","title":{"rendered":"Java SAX\u89e3\u6790\u5668\uff1a\u9ad8\u6548XML\u6570\u636e\u5904\u7406\u4e0e\u5e94\u7528\u6307\u5357"},"content":{"rendered":"

\u8fd9\u662f\u6587\u7ae0\u300aJava SAX \u89e3\u6790\u5668\u793a\u4f8b\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51711\u90e8\u5206\uff09\u3002<\/p>\n

\u5185\u5bb9\u7247\u6bb5: SAX\u89e3\u6790\u5668\u662fJava\u4e2d\u63d0\u4f9bAPI\u6765\u89e3\u6790XML\u6587\u6863\u7684\u5de5\u5177\u3002SAX\u89e3\u6790\u5668\u548cDOM\u89e3\u6790\u5668\u4e0d\u540c\u7684\u5730\u65b9\u5728\u4e8e\u5b83\u4e0d\u4f1a\u5c06\u6574\u4e2aXML\u6587\u6863\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\uff0c\u800c\u662f\u6309\u987a\u5e8f\u8bfb\u53d6XML\u6587\u6863\u3002<\/p>\n

SAX \u89e3\u6790\u5668<\/h2>\n

javax.xml.parsers.SAXParser<\/code> \u63d0\u4f9b\u4f7f\u7528\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u89e3\u6790XML\u6587\u6863\u7684\u65b9\u6cd5\u3002\u8be5\u7c7b\u5b9e\u73b0\u4e86XMLReader<\/code>\u63a5\u53e3\uff0c\u5e76\u63d0\u4f9b\u4e86\u4e0d\u540c\u7248\u672c\u7684parse()<\/code>\u65b9\u6cd5\u6765\u4eceFile<\/code>\u3001InputStream<\/code>\u3001SAX InputSource<\/code>\u548cString URI<\/code>\u4e2d\u8bfb\u53d6XML\u6587\u6863\u3002\u5b9e\u9645\u7684\u89e3\u6790\u7531Handler<\/code>\u7c7b\u6267\u884c\u3002\u6211\u4eec\u9700\u8981\u521b\u5efa\u81ea\u5df1\u7684\u5904\u7406\u7a0b\u5e8f\u7c7b\u6765\u89e3\u6790XML\u6587\u6863\u3002\u6211\u4eec\u9700\u8981\u5b9e\u73b0org.xml.sax.ContentHandler<\/code>\u63a5\u53e3\u6765\u521b\u5efa\u6211\u4eec\u81ea\u5df1\u7684\u5904\u7406\u7a0b\u5e8f\u7c7b\u3002\u8be5\u63a5\u53e3\u5305\u542b\u5728\u4e8b\u4ef6\u53d1\u751f\u65f6\u63a5\u6536\u901a\u77e5\u7684\u56de\u8c03\u65b9\u6cd5\u3002\u4f8b\u5982StartDocument<\/code>\u3001EndDocument<\/code>\u3001StartElement<\/code>\u3001EndElement<\/code>\u3001CharacterData<\/code>\u7b49\u3002org.xml.sax.helpers.DefaultHandler<\/code>\u63d0\u4f9b\u4e86ContentHandler<\/code>\u63a5\u53e3\u7684\u9ed8\u8ba4\u5b9e\u73b0\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u6269\u5c55\u8be5\u7c7b\u6765\u521b\u5efa\u81ea\u5df1\u7684\u5904\u7406\u7a0b\u5e8f\u3002\u5efa\u8bae\u6269\u5c55\u8be5\u7c7b\uff0c\u56e0\u4e3a\u6211\u4eec\u53ef\u80fd\u53ea\u9700\u8981\u5b9e\u73b0\u5176\u4e2d\u7684\u51e0\u4e2a\u65b9\u6cd5\u3002\u901a\u8fc7\u6269\u5c55\u8be5\u7c7b\uff0c\u6211\u4eec\u7684\u4ee3\u7801\u5c06\u66f4\u52a0\u6e05\u6670\u548c\u53ef\u7ef4\u62a4\u3002<\/p>\n

SAX\u89e3\u6790\u5668\u793a\u4f8b<\/h3>\n

\u8ba9\u6211\u4eec\u73b0\u5728\u8f6c\u5230SAX\u89e3\u6790\u5668\u7684\u793a\u4f8b\u7a0b\u5e8f\uff0c\u7a0d\u540e\u6211\u4f1a\u8be6\u7ec6\u89e3\u91ca\u4e0d\u540c\u7684\u7279\u70b9\u3002employees.xml<\/code><\/p>\n

<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n<Employees>\r\n\t<Employee id=\"1\">\r\n\t\t<age>29<\/age>\r\n\t\t<name>Pankaj<\/name>\r\n\t\t<gender>Male<\/gender>\r\n\t\t<role>Java Developer<\/role>\r\n\t<\/Employee>\r\n\t<Employee id=\"2\">\r\n\t\t<age>35<\/age>\r\n\t\t<name>Lisa<\/name>\r\n\t\t<gender>Female<\/gender>\r\n\t\t<role>CEO<\/role>\r\n\t<\/Employee>\r\n\t<Employee id=\"3\">\r\n\t\t<age>40<\/age>\r\n\t\t<name>Tom<\/name>\r\n\t\t<gender>Male<\/gender>\r\n\t\t<role>Manager<\/role>\r\n\t<\/Employee>\r\n\t<Employee id=\"4\">\r\n\t\t<age>25<\/age>\r\n\t\t<name>Meghna<\/name>\r\n\t\t<gender>Female<\/gender>\r\n\t\t<role>Manager<\/role>\r\n\t<\/Employee>\r\n<\/Employees>\r\n<\/code><\/pre>\n
\u6240\u4ee5\u6211\u4eec\u5728\u6587\u4ef6\u7cfb\u7edf\u4e2d\u5b58\u50a8\u4e86\u4e00\u4e2aXML\u6587\u4ef6\uff0c\u5e76\u4e14\u901a\u8fc7\u67e5\u770b\u5b83\uff0c\u6211\u4eec\u53ef\u4ee5\u5f97\u51fa\u7ed3\u8bba\u5b83\u5305\u542b\u4e86\u4e00\u4e2a\u5458\u5de5\u5217\u8868\u3002\u6bcf\u4e2a\u5458\u5de5\u90fd\u6709id<\/code>\u5c5e\u6027\u548c\u5e74\u9f84\u3001\u59d3\u540d\u3001\u6027\u522b\u548c\u804c\u4f4d\u5b57\u6bb5\u3002\u6211\u4eec\u5c06\u4f7f\u7528SAX\u89e3\u6790\u5668\u6765\u89e3\u6790\u8fd9\u4e2aXML\uff0c\u5e76\u521b\u5efa\u4e00\u4e2a\u5458\u5de5\u5bf9\u8c61\u7684\u5217\u8868\u3002\u8fd9\u91cc\u662f\u4ee3\u8868XML\u4e2d\u5458\u5de5\u5143\u7d20\u7684\u5458\u5de5\u5bf9\u8c61\u3002<\/p>\n
package com.Olivia.xml;\r\n\r\npublic class Employee {\r\n    private int id;\r\n    private String name;\r\n    private String gender;\r\n    private int age;\r\n    private String role;\r\n    \r\n    public int getId() {\r\n        return id;\r\n    }\r\n    public void setId(int id) {\r\n        this.id = id;\r\n    }\r\n    public String getName() {\r\n        return name;\r\n    }\r\n    public void setName(String name) {\r\n        this.name = name;\r\n    }\r\n    public String getGender() {\r\n        return gender;\r\n    }\r\n    public void setGender(String gender) {\r\n        this.gender = gender;\r\n    }\r\n    public int getAge() {\r\n        return age;\r\n    }\r\n    public void setAge(int age) {\r\n        this.age = age;\r\n    }\r\n    public String getRole() {\r\n        return role;\r\n    }\r\n    public void setRole(String role) {\r\n        this.role = role;\r\n    }\r\n    \r\n    @Override\r\n    public String toString() {\r\n        return \"Employee:: ID=\"+this.id+\" Name=\" + this.name + \" Age=\" + this.age + \" Gender=\" + this.gender +\r\n                \" Role=\" + this.role;\r\n    }\r\n    \r\n}\r\n<\/code><\/pre>\n
\u8ba9\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u6269\u5c55DefaultHandler<\/code>\u7c7b\u7684\u81ea\u5b9a\u4e49SAX\u89e3\u6790\u5668\u5904\u7406\u7a0b\u5e8f\u7c7b\u3002<\/p>\n
\r\npackage com.Olivia.xml.sax;\r\n\r\nimport java.util.ArrayList;\r\nimport java.util.List;\r\n\r\nimport org.xml.sax.Attributes;\r\nimport org.xml.sax.SAXException;\r\nimport org.xml.sax.helpers.DefaultHandler;\r\n\r\nimport com.Olivia.xml.Employee;\r\n\r\npublic class MyHandler extends DefaultHandler {\r\n\r\n\t\/\/ List to hold Employees object\r\n\tprivate List<Employee> empList = null;\r\n\tprivate Employee emp = null;\r\n\tprivate StringBuilder data = null;\r\n\r\n\t\/\/ getter method for employee list\r\n\tpublic List<Employee> getEmpList() {\r\n\t\treturn empList;\r\n\t}\r\n\r\n\tboolean bAge = false;\r\n\tboolean bName = false;\r\n\tboolean bGender = false;\r\n\tboolean bRole = false;\r\n\r\n\t@Override\r\n\tpublic void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {\r\n\r\n\t\tif (qName.equalsIgnoreCase(\"Employee\")) {\r\n\t\t\t\/\/ create a new Employee and put it in Map\r\n\t\t\tString id = attributes.getValue(\"id\");\r\n\t\t\t\/\/ initialize Employee object and set id attribute\r\n\t\t\temp = new Employee();\r\n\t\t\temp.setId(Integer.parseInt(id));\r\n\t\t\t\/\/ initialize list\r\n\t\t\tif (empList == null)\r\n\t\t\t\tempList = new ArrayList<>();\r\n\t\t} else if (qName.equalsIgnoreCase(\"name\")) {\r\n\t\t\t\/\/ set boolean values for fields, will be used in setting Employee variables\r\n\t\t\tbName = true;\r\n\t\t} else if (qName.equalsIgnoreCase(\"age\")) {\r\n\t\t\tbAge = true;\r\n\t\t} else if (qName.equalsIgnoreCase(\"gender\")) {\r\n\t\t\tbGender = true;\r\n\t\t} else if (qName.equalsIgnoreCase(\"role\")) {\r\n\t\t\tbRole = true;\r\n\t\t}\r\n\t\t\/\/ create the data container\r\n\t\tdata = new StringBuilder();\r\n\t}\r\n\r\n\t@Override\r\n\tpublic void endElement(String uri, String localName, String qName) throws SAXException {\r\n\t\tif (bAge) {\r\n\t\t\t\/\/ age element, set Employee age\r\n\t\t\temp.setAge(Integer.parseInt(data.toString()));\r\n\t\t\tbAge = false;\r\n\t\t} else if (bName) {\r\n\t\t\temp.setName(data.toString());\r\n\t\t\tbName = false;\r\n\t\t} else if (bRole) {\r\n\t\t\temp.setRole(data.toString());\r\n\t\t\tbRole = false;\r\n\t\t} else if (bGender) {\r\n\t\t\temp.setGender(data.toString());\r\n\t\t\tbGender = false;\r\n\t\t}\r\n\t\t\r\n\t\tif (qName.equalsIgnoreCase(\"Employee\")) {\r\n\t\t\t\/\/ add Employee object to list\r\n\t\t\tempList.add(emp);\r\n\t\t}\r\n\t}\r\n\r\n\t@Override\r\n\tpublic void characters(char ch[], int start, int length) throws SAXException {\r\n\t\tdata.append(new String(ch, start, length));\r\n\t}\r\n}\r\n<\/code><\/pre>\n
MyHandler<\/code>\u4f5c\u4e3a\u4e00\u4e2a\u5b57\u6bb5\u5305\u542b\u4e86Employee<\/code>\u5bf9\u8c61\u7684\u5217\u8868\uff0c\u5e76\u4e14\u53ea\u6709\u4e00\u4e2a\u7528\u4e8e\u83b7\u53d6\u8be5\u5b57\u6bb5\u7684getter\u65b9\u6cd5\u3002\u5728\u4e8b\u4ef6\u5904\u7406\u65b9\u6cd5\u4e2d\uff0cEmployee<\/code>\u5bf9\u8c61\u4f1a\u88ab\u6dfb\u52a0\u5230\u5217\u8868\u4e2d\u3002\u6b64\u5916\uff0c\u6211\u4eec\u8fd8\u6709\u4e00\u4e2aEmployee<\/code>\u5b57\u6bb5\uff0c\u5c06\u7528\u4e8e\u521b\u5efa\u4e00\u4e2aEmployee<\/code>\u5bf9\u8c61\uff0c\u4e00\u65e6\u6240\u6709\u5b57\u6bb5\u90fd\u8bbe\u7f6e\u5b8c\u6210\uff0c\u8be5\u5bf9\u8c61\u5c06\u88ab\u6dfb\u52a0\u5230\u5458\u5de5\u5217\u8868\u4e2d\u3002<\/p>\n
\u9700\u8981\u91cd\u5199\u7684SAX\u89e3\u6790\u5668\u65b9\u6cd5<\/h3>\n
\u91cd\u5199\u7684\u91cd\u8981\u65b9\u6cd5\u5305\u62ecstartElement()<\/code>\u3001endElement()<\/code>\u548ccharacters()<\/code>\u3002SAXParser\u5f00\u59cb\u89e3\u6790\u6587\u6863\u65f6\uff0c\u5f53\u53d1\u73b0\u4efb\u4f55\u5f00\u59cb\u5143\u7d20\u65f6\uff0c\u4f1a\u8c03\u7528startElement()<\/code>\u65b9\u6cd5\u3002\u6211\u4eec\u91cd\u5199\u8fd9\u4e2a\u65b9\u6cd5\u6765\u8bbe\u7f6e\u5e03\u5c14\u53d8\u91cf\uff0c\u4ee5\u4fbf\u7528\u4e8e\u8bc6\u522b\u5143\u7d20\u3002\u6211\u4eec\u4e5f\u5229\u7528\u8fd9\u4e2a\u65b9\u6cd5\u5728\u6bcf\u6b21\u53d1\u73b0Employee<\/code>\u5f00\u59cb\u5143\u7d20\u65f6\u521b\u5efa\u4e00\u4e2a\u65b0\u7684Employee<\/code>\u5bf9\u8c61\u3002\u67e5\u770b\u8fd9\u91cc\u5982\u4f55\u8bfb\u53d6id<\/code>\u5c5e\u6027\u5e76\u8bbe\u7f6eEmployee<\/code>\u5bf9\u8c61\u7684id<\/code>\u5b57\u6bb5\u3002\u5f53SAXParser\u5728\u5143\u7d20\u5185\u627e\u5230\u5b57\u7b26\u6570\u636e\u65f6\uff0c\u4f1a\u8c03\u7528characters()<\/code>\u65b9\u6cd5\u3002\u8bf7\u6ce8\u610f\uff0cSAX\u89e3\u6790\u5668\u53ef\u80fd\u4f1a\u5c06\u6570\u636e\u5206\u6210\u591a\u4e2a\u5757\uff0c\u5e76\u591a\u6b21\u8c03\u7528characters()<\/code>\u65b9\u6cd5\uff08\u8bf7\u9605\u8bfbContentHandler<\/code>\u7c7bcharacters()<\/code>\u65b9\u6cd5\u7684\u6587\u6863\uff09\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u6211\u4eec\u4f7f\u7528StringBuilder<\/code>\u6765\u4fdd\u6301\u8fd9\u4e9b\u6570\u636e\uff0c\u5e76\u4f7f\u7528append()<\/code>\u65b9\u6cd5\u3002endElement()<\/code>\u662f\u4f7f\u7528StringBuilder<\/code>\u6570\u636e\u8bbe\u7f6eEmployee<\/code>\u5bf9\u8c61\u5c5e\u6027\u5e76\u5728\u627e\u5230Employee<\/code>\u7ed3\u675f\u5143\u7d20\u6807\u7b7e\u65f6\u5c06Employee<\/code>\u5bf9\u8c61\u6dfb\u52a0\u5230\u5217\u8868\u4e2d\u7684\u4f4d\u7f6e\u3002\u4e0b\u9762\u662f\u4f7f\u7528MyHandler<\/code>\u89e3\u6790\u4e0a\u8ff0XML\u5230Employee<\/code>\u5bf9\u8c61\u5217\u8868\u7684\u6d4b\u8bd5\u7a0b\u5e8f\u3002<\/p>\n
package com.Olivia.xml.sax;\r\n\r\nimport java.io.File;\r\nimport java.io.IOException;\r\nimport java.util.List;\r\n\r\nimport javax.xml.parsers.ParserConfigurationException;\r\nimport javax.xml.parsers.SAXParser;\r\nimport javax.xml.parsers.SAXParserFactory;\r\n\r\nimport org.xml.sax.SAXException;\r\n\r\nimport com.Olivia.xml.Employee;\r\n\r\npublic class XMLParserSAX {\r\n\r\n    public static void main(String[] args) {\r\n    SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();\r\n    try {\r\n        SAXParser saxParser = saxParserFactory.newSAXParser();\r\n        MyHandler handler = new MyHandler();\r\n        saxParser.parse(new File(\"\/Users\/scdev\/employees.xml\"), handler);\r\n        \/\/Get Employees list\r\n        List<Employee> empList = handler.getEmpList();\r\n        \/\/print employee information\r\n        for(Employee emp : empList)\r\n            System.out.println(emp);\r\n    } catch (ParserConfigurationException | SAXException | IOException e) {\r\n        e.printStackTrace();\r\n    }\r\n    }\r\n\r\n}\r\n<\/code><\/pre>\n
\u8fd9\u662f\u4e0a\u8ff0\u7a0b\u5e8f\u7684\u8f93\u51fa\u3002<\/p>\n
Employee:: ID=1 Name=Pankaj Age=29 Gender=Male Role=Java Developer\r\nEmployee:: ID=2 Name=Lisa Age=35 Gender=Female Role=CEO\r\nEmployee:: ID=3 Name=Tom Age=40 Gender=Male Role=Manager\r\nEmployee:: ID=4 Name=Meghna Age=25 Gender=Female Role=Manager\r\n<\/code><\/pre>\n
SAXParserFactory<\/code>\u63d0\u4f9b\u4e86\u83b7\u53d6SAXParser<\/code>\u5b9e\u4f8b\u7684\u5de5\u5382\u65b9\u6cd5\u3002\u6211\u4eec\u5c06File<\/code>\u5bf9\u8c61\u4f20\u9012\u7ed9parse<\/code>\u65b9\u6cd5\uff0c\u5e76\u4e0eMyHandler<\/code>\u5b9e\u4f8b\u4e00\u8d77\u5904\u7406\u56de\u8c03\u4e8b\u4ef6\u3002SAXParser\u5728\u5f00\u59cb\u65f6\u53ef\u80fd\u6709\u70b9\u56f0\u60d1\uff0c\u4f46\u5982\u679c\u4f60\u6b63\u5728\u5904\u7406\u4e00\u4e2a\u5927\u578bXML\u6587\u6863\uff0c\u5b83\u63d0\u4f9b\u4e86\u6bd4DOM\u89e3\u6790\u5668\u66f4\u9ad8\u6548\u7684\u8bfb\u53d6XML\u7684\u65b9\u5f0f\u3002\u4ee5\u4e0a\u5c31\u662f\u5173\u4e8eJava\u4e2d\u7684SAX\u89e3\u6790\u5668\u7684\u5168\u90e8\u5185\u5bb9\u3002<\/p>\n
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\u53c2\u8003\uff1aSAX\u89e3\u6790\u5668<\/a>\uff0c\u9ed8\u8ba4\u5904\u7406\u7a0b\u5e8f<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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