Grails中的连接错误

我在运行grail应用程序时遇到以下错误。我尝试过各种方法，但错误仍然存在

谁能帮忙吗

`Server access Error: Connection refused url=http://grails.org/plugins/grails-mysql-connector-java/tags/RELEASE_5_1_16/mysql-connector-java-5.1.16.pom`

MY Config.groovy

//搜索合并到主配置中的配置文件的位置 //配置文件可以是Java属性文件或ConfigSlurper脚本

// grails.config.locations = [ "classpath:${appName}-config.properties",
//                             "classpath:${appName}-config.groovy",
//                             "file:${userHome}/.grails/${appName}-config.properties",
//                             "file:${userHome}/.grails/${appName}-config.groovy"]

// if (System.properties["${appName}.config.location"]) 
   {
//   
     grails.config.locations << "file:" + System.properties["${appName}.config.location"]

// }
grails.project.groupId = appName // change this to alter the default package name and Maven publishing destination
grails.mime.file.extensions = true // enables the parsing of file extensions from URLs into the request format
grails.mime.use.accept.header = false
grails.mime.types = [ html: ['text/html','application/xhtml+xml'],
                      xml: ['text/xml', 'application/xml'],
                      text: 'text/plain',
                      js: 'text/javascript',
                      rss: 'application/rss+xml',
                      atom: 'application/atom+xml',
                      css: 'text/css',
                      csv: 'text/csv',
                      all: '*/*',
                      json: ['application/json','text/json'],
                      form: 'application/x-www-form-urlencoded',
                      multipartForm: 'multipart/form-data'
                    ]

// URL Mapping Cache Max Size, defaults to 5000
//grails.urlmapping.cache.maxsize = 1000

// What URL patterns should be processed by the resources plugin
grails.resources.adhoc.patterns = ['/images/*', '/css/*', '/js/*', '/plugins/*']


// The default codec used to encode data with ${}
grails.views.default.codec = "none" // none, html, base64
grails.views.gsp.encoding = "UTF-8"
grails.converters.encoding = "UTF-8"
// enable Sitemesh preprocessing of GSP pages
grails.views.gsp.sitemesh.preprocess = true
// scaffolding templates configuration
grails.scaffolding.templates.domainSuffix = 'Instance'

// Set to false to use the new Grails 1.2 JSONBuilder in the render method
grails.json.legacy.builder = false
// enabled native2ascii conversion of i18n properties files
grails.enable.native2ascii = true
// packages to include in Spring bean scanning
grails.spring.bean.packages = []
// whether to disable processing of multi part requests
grails.web.disable.multipart=false

// request parameters to mask when logging exceptions
grails.exceptionresolver.params.exclude = ['password']

// enable query caching by default
grails.hibernate.cache.queries = true

// set per-environment serverURL stem for creating absolute links
environments {
    development {
        grails.logging.jul.usebridge = true
    }
    production {
        grails.logging.jul.usebridge = false
        // TODO: grails.serverURL = "http://www.changeme.com"
    }
}

// log4j configuration
log4j = {
    // Example of changing the log pattern for the default console
    // appender:
    //
    //appenders {
    //    console name:'stdout', layout:pattern(conversionPattern: '%c{2} %m%n')
    //}

    error  'org.codehaus.groovy.grails.web.servlet',  //  controllers
           'org.codehaus.groovy.grails.web.pages', //  GSP
           'org.codehaus.groovy.grails.web.sitemesh', //  layouts
           'org.codehaus.groovy.grails.web.mapping.filter', // URL mapping
           'org.codehaus.groovy.grails.web.mapping', // URL mapping
           'org.codehaus.groovy.grails.commons', // core / classloading
           'org.codehaus.groovy.grails.plugins', // plugins
           'org.codehaus.groovy.grails.orm.hibernate', // hibernate integration
           'org.springframework',
           'org.hibernate',
           'net.sf.ehcache.hibernate'
}

// Added by the Mahout Recommender plugin:
mahout.recommender.mode = 'config'  // 'input', 'config' or 'class'
mahout.recommender.hasPreference = true
mahout.recommender.selected = 1 // 1. user-based, 2. item-based or 3. slope-one
mahout.recommender.similarity = 'PearsonCorrelation' //'PearsonCorrelation', 'EuclideanDistance', 'LogLikelihood' or 'TanimotoCoefficient'
mahout.recommender.withWeighting = false
mahout.recommender.neighborhood = 2
mahout.recommender.data.model = 'mysql'
mahout.recommender.preference.table = 'preference'
mahout.recommender.preference.valueColumn = 'pref_value'

mahout.recommender.hasPreference = false
mahout.recommender.data.file = 'ratings.dat'
export GRAILS_OPTS="-XX:MaxPermSize=256m -Xmx1024M -server"

//grails.config.locations=[“类路径：${appName}-config.properties”，
//“类路径：${appName}-config.groovy”，
//“文件：${userHome}/.grails/${appName}-config.properties”，
//“文件：${userHome}/.grails/${appName}-config.groovy”]
//if（System.properties[“${appName}.config.location”]）
{
//   
grails.config.locations请检查您的
“grails app/conf/BuildConfig.groovy”

我想你可能不小心编辑了它。看起来msql连接器放错地方了

dependencies {
    // specify dependencies here under either 'build', 'compile', 'runtime', 'test' or 'provided' scopes eg.
    runtime 'mysql:mysql-connector-java:5.1.16'  // RIGHT PLACE
}

plugins {
    runtime ":hibernate:$grailsVersion"
    runtime ":jquery:1.7.1"
    runtime ":resources:1.1.5"

    build ":tomcat:$grailsVersion"
    //runtime ':mysql-connector-java:5.1.16' // WRONG PLACE, IF YOU SAW HERE.
}

我发现我需要为grails设置代理可能是BuildConfig.groovy中的依赖项有问题。你使用mysql数据库吗？我正在尝试运行从git下载的项目。它在codecan中使用mysql。你可以发布git存储库，或者你的BuildConfig.groovy可以告诉我如何降级/卸载Grail。我已经这样做了下载了较新版本，应用程序是为较旧版本构建的。为什么降级？可以运行“grails upgrade”升级项目以匹配grails版本。如果要使用grails.I suggess的多版本