{"id":315,"date":"2026-04-14T22:10:57","date_gmt":"2026-04-14T14:10:57","guid":{"rendered":"https:\/\/arknight.wiki\/?p=315"},"modified":"2026-04-14T22:10:57","modified_gmt":"2026-04-14T14:10:57","slug":"%e4%b8%80%e9%81%93java%e6%96%87%e4%bb%b6%e4%b8%8a%e4%bc%a0%e7%9b%ae%e5%bd%95%e7%a9%bf%e6%a2%ad%e4%bf%ae%e5%a4%8d","status":"publish","type":"post","link":"https:\/\/arknight.wiki\/index.php\/2026\/04\/14\/%e4%b8%80%e9%81%93java%e6%96%87%e4%bb%b6%e4%b8%8a%e4%bc%a0%e7%9b%ae%e5%bd%95%e7%a9%bf%e6%a2%ad%e4%bf%ae%e5%a4%8d\/","title":{"rendered":"\u4e00\u9053java\u6587\u4ef6\u4e0a\u4f20\u76ee\u5f55\u7a7f\u68ad\u4fee\u590d"},"content":{"rendered":"

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package com.xiinnn;\n\nimport org.springframework.beans.factory.annotation.Value;\nimport org.springframework.context.annotation.Configuration;\nimport org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;\nimport org.springframework.web.servlet.config.annotation.WebMvcConfigurer;\n\n@Configuration\npublic class MyConfig implements WebMvcConfigurer {\n    @Value(\"${my.uploadPath}\")\n    private String uploadPath;\n\n    public void addResourceHandlers(ResourceHandlerRegistry registry) {\n        registry.addResourceHandler(new String[]{this.uploadPath + \"\/**\"}).addResourceLocations(new String[]{\"file:\" + this.uploadPath + \"\/\"});\n    }\n}<\/code><\/pre>\n
package com.xiinnn;\n\nimport java.nio.file.CopyOption;\nimport java.nio.file.Files;\nimport java.nio.file.LinkOption;\nimport java.nio.file.Path;\nimport java.nio.file.Paths;\nimport org.springframework.web.bind.annotation.GetMapping;\nimport org.springframework.web.bind.annotation.PostMapping;\nimport org.springframework.web.bind.annotation.RequestParam;\nimport org.springframework.web.bind.annotation.RestController;\nimport org.springframework.web.multipart.MultipartFile;\n\n@RestController\npublic class MyController {\n    @PostMapping({\"\/doUpload\"})\n    public String uploadJpgImage(@RequestParam(\"file\") MultipartFile file) throws Exception {\n        String hint = \"\u63d0\u793a\uff1a\u672c\u5904\u4ec5\u5141\u8bb8\u4e0a\u4f20jpg\u6587\u4ef6\";\n        String fileName = file.getOriginalFilename();\n        if (!fileName.contains(\".jpg\")) {\n            return \"nonono\";\n        } else {\n            Path targetDirectory = Paths.get(\"upload\/\").toAbsolutePath();\n            Path targetPath = targetDirectory.resolve(fileName);\n            if (!Files.exists(targetDirectory, new LinkOption[0])) {\n                Files.createDirectories(targetDirectory);\n            }\n\n            Files.copy(file.getInputStream(), targetPath, new CopyOption[0]);\n            String absolutePath = targetPath.toString();\n            return absolutePath;\n        }\n    }\n\n    @GetMapping({\"\/\"})\n    public String index() {\n        return \"<form action=\"\/doUpload\" method=\"post\" enctype=\"multipart\/form-data\" id=\"form\">n    <label for=\"file\">\u6587\u4ef6: <\/label>n    <input type=\"file\" name=\"file\" id=\"file\"><br>n    <input type=\"submit\" name=\"submit\" value=\"\u63d0\u4ea4\">n<\/form>\";\n    }\n}<\/code><\/pre>\n
package com.xiinnn;\n\nimport org.springframework.boot.SpringApplication;\nimport org.springframework.boot.autoconfigure.SpringBootApplication;\n\n@SpringBootApplication\npublic class SpringBootMain {\n    public static void main(String[] args) {\n        SpringApplication.run(SpringBootMain.class, args);\n    }\n}<\/code><\/pre>\n
\u7136\u540e\u53d1\u73b0\u5728MyController<\/code>\u7c7b\u4e2d\uff0cString fileName = file.getOriginalFilename();<\/code>\u76f4\u63a5\u62ff\u7528\u6237\u7684\u8f93\u5165\u6765\u62fc\u63a5\u4e0a\u4f20\u8def\u5f84\uff0c\u5982\u679c\u7528\u6237\u4f20\u7684\u6587\u4ef6\u540d\u662f..\/..\/hack<\/code>\u7b49\u4f1a\u5bfc\u81f4\u6587\u4ef6\u76ee\u5f55\u7a7f\u68ad\uff0c\u5199\u9053upload\/<\/code>\u5916\u7684\u5730\u65b9<\/p>\n
\u6211\u4eec\u7528idea\u65b0\u5efa\u4e00\u4e2a\u9879\u76ee\uff0c\u590d\u5236\u4e4b\u524djar\u5305\u91cc\u9762\u7684application,yml<\/code>\u548cpom.xml<\/code>\uff0c\u7136\u540e\u590d\u5236\u5bf9\u5e94\u7684\u7c7b\u540d\u548c\u5305\u540d<\/p>\n
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package com.xiinnn;\n\nimport org.springframework.web.bind.annotation.GetMapping;\nimport org.springframework.web.bind.annotation.PostMapping;\nimport org.springframework.web.bind.annotation.RequestParam;\nimport org.springframework.web.bind.annotation.RestController;\nimport org.springframework.web.multipart.MultipartFile;\n\nimport java.io.IOException;\nimport java.io.InputStream;\nimport java.nio.file.Files;\nimport java.nio.file.Path;\nimport java.nio.file.Paths;\nimport java.util.Locale;\n\n@RestController\npublic class MyController {\n\n    @PostMapping(\"\/doUpload\")\n    public String uploadJpgImage(@RequestParam(\"file\") MultipartFile file) throws IOException {\n        String originalFilename = file.getOriginalFilename();\n        if (originalFilename == null) {\n            return \"nonono\";\n        }\n\n        String fileName = Paths.get(originalFilename).getFileName().toString();\n        if (!fileName.toLowerCase(Locale.ROOT).endsWith(\".jpg\")) {\n            return \"nonono\";\n        }\n\n        Path targetDirectory = Paths.get(\"upload\").toAbsolutePath().normalize();\n        Path targetPath = targetDirectory.resolve(fileName).normalize();\n        if (!targetPath.startsWith(targetDirectory)) {\n            return \"nonono\";\n        }\n\n        if (!Files.exists(targetDirectory)) {\n            Files.createDirectories(targetDirectory);\n        }\n\n        try (InputStream inputStream = file.getInputStream()) {\n            Files.copy(inputStream, targetPath);\n        }\n\n        return targetPath.toString();\n    }\n\n    @GetMapping(\"\/\")\n    public String index() {\n        return \"<form action=\"\/doUpload\" method=\"post\" enctype=\"multipart\/form-data\" id=\"form\">n\"\n                + \"    <label for=\"file\">\u6587\u4ef6: <\/label>n\"\n                + \"    <input type=\"file\" name=\"file\" id=\"file\"><br>n\"\n                + \"    <input type=\"submit\" name=\"submit\" value=\"\u63d0\u4ea4\">n\"\n                + \"<\/form>\";\n    }\n}\n<\/code><\/pre>\n
package com.xiinnn;\n\nimport org.springframework.beans.factory.annotation.Value;\nimport org.springframework.context.annotation.Configuration;\nimport org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;\nimport org.springframework.web.servlet.config.annotation.WebMvcConfigurer;\n\n@Configuration\npublic class MyConfig implements WebMvcConfigurer {\n\n    @Value(\"${my.uploadPath}\")\n    private String uploadPath;\n\n    @Override\n    public void addResourceHandlers(ResourceHandlerRegistry registry) {\n        registry.addResourceHandler(uploadPath + \"\/**\")\n                .addResourceLocations(\"file:\" + uploadPath + \"\/\");\n    }\n}<\/code><\/pre>\n
package com.xiinnn;\n\nimport org.springframework.boot.SpringApplication;\nimport org.springframework.boot.autoconfigure.SpringBootApplication;\n\n@SpringBootApplication\npublic class SpringBootMain {\n\n    public static void main(String[] args) {\n        SpringApplication.run(SpringBootMain.class, args);\n    }\n}<\/code><\/pre>\n
\u7136\u540e\u76f4\u63a5\u5728maven\u9762\u677f\u53cc\u51fbpackage\u751f\u6210\u65b0\u7684jar\u5305\u4e0a\u4f20\u5373\u53ef\uff08\u5728target\u91cc\u9762\uff09<\/p>\n
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\"\"<\/div><\/p>\n","protected":false},"excerpt":{"rendered":"
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