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java - 如何在 Grails 2.3.11 中安装 Apache POI

问题描述

使用 Apache 的示例，我正在尝试将 Apache POI 加载到我的 Grails 应用程序中。我有 GGTS（用于 Grails 开发的 Eclipse 克隆设置）作为我的 IDE。当我尝试像这样创建一个新的 HSSFWorkbook 对象时： HSSFWorkbook workbook = new HSSFWorkbook()IDE 告诉我无法解析类 HSSFWorkbook。如何正确设置 Apache POI 以便它在 Grails 2.3.11 中工作？我必须使用 Excel 文件，而 Apache POI 给了我更多的控制权。我已经看到它在另一个 Grails 2.3.11 应用程序中工作，所以我知道这是可能的。我更喜欢 Grails 2.3.11 支持的最新版本。

BuildConfig.groovy

grails.servlet.version = "3.0" // Change depending on target container compliance (2.5 or 3.0)
grails.project.class.dir = "target/classes"
grails.project.test.class.dir = "target/test-classes"
grails.project.test.reports.dir = "target/test-reports"
grails.project.work.dir = "target/work"
grails.project.target.level = 1.6
grails.project.source.level = 1.6
grails.server.port.http=8070
//grails.project.war.file = "target/${appName}-${appVersion}.war"

grails.project.fork = [
    // configure settings for compilation JVM, note that if you alter the Groovy version forked compilation is required
    //  compile: [maxMemory: 256, minMemory: 64, debug: false, maxPerm: 256, daemon:true],

    // configure settings for the test-app JVM, uses the daemon by default
    test: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, daemon:true],
    // configure settings for the run-app JVM
    run: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, forkReserve:false],
    // configure settings for the run-war JVM
    war: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, forkReserve:false],
    // configure settings for the Console UI JVM
    console: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256]
]

grails.project.dependency.resolver = "maven" // or ivy
grails.project.dependency.resolution = {
    // inherit Grails' default dependencies
    inherits("global") {
        // specify dependency exclusions here; for example, uncomment this to disable ehcache:
        // excludes 'ehcache'
    }
    log "error" // log level of Ivy resolver, either 'error', 'warn', 'info', 'debug' or 'verbose'
    checksums true // Whether to verify checksums on resolve
    legacyResolve false // whether to do a secondary resolve on plugin installation, not advised and here for backwards compatibility

    repositories {
        inherits true // Whether to inherit repository definitions from plugins

        grailsPlugins()
        grailsHome()
        mavenLocal()
        grailsCentral()
        mavenCentral()
        // uncomment these (or add new ones) to enable remote dependency resolution from public Maven repositories
        //mavenRepo "http://repository.codehaus.org"
        //mavenRepo "http://download.java.net/maven/2/"
        //mavenRepo "http://repository.jboss.com/maven2/"
    }

    dependencies {
        // specify dependencies here under either 'build', 'compile', 'runtime', 'test' or 'provided' scopes e.g.
        // runtime 'mysql:mysql-connector-java:5.1.27'
        // runtime 'org.postgresql:postgresql:9.3-1100-jdbc41'
        test "org.grails:grails-datastore-test-support:1.0-grails-2.3"
        runtime 'org.codehaus.groovy:groovy-all:2.4.7'
        runtime 'org.apache.poi:poi:3.14'
        runtime 'org.apache.poi:poi-ooxml:3.14'
    }

    plugins {
        // plugins for the build system only
        build ":tomcat:7.0.54"

        // plugins for security
        compile ':spring-security-core:2.0.0'
        compile ':spring-security-ldap:2.0.0'

        // plugins for the compile step
        compile ":scaffolding:2.0.3"
        compile ':cache:1.1.7'

        // plugins needed at runtime but not for compilation
        runtime ":hibernate4:4.3.5.4"
        runtime ":database-migration:1.4.0"
        runtime ":jquery:1.11.1"
        runtime ":resources:1.2.8"
        runtime ':console:1.5.12'
        // Uncomment these (or add new ones) to enable additional resources capabilities
        //runtime ":zipped-resources:1.0.1"
        //runtime ":cached-resources:1.1"
        //runtime ":yui-minify-resources:0.1.5"

        // An alternative to the default resources plugin is the asset-pipeline plugin
        //compile ":asset-pipeline:1.6.1"

        // Uncomment these to enable additional asset-pipeline capabilities
        //compile ":sass-asset-pipeline:1.5.5"
        //compile ":less-asset-pipeline:1.5.3"
        //compile ":coffee-asset-pipeline:1.5.0"
        //compile ":handlebars-asset-pipeline:1.3.0.1"
    }
}

标签： javagrailsapache-poi

解决方案

更改您的依赖项块以设置编译时依赖项，并删除不需要的 groovy 依赖项：

dependencies {
    test "org.grails:grails-datastore-test-support:1.0-grails-2.3"
    compile 'org.apache.poi:poi:3.14'
    compile 'org.apache.poi:poi-ooxml:3.14'
}

Grails 已经提供了适当版本的 Groovy，因此您不需要提供它。代码编译需要 POI 依赖项，因此它们应该是编译时依赖项。

如果这不能解决您的问题，至少有可能 GGTS 没有正确下载依赖项，但我怀疑情况会如此。

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