Question

我们将Eclipse STS用于简单的Grails项目。我们从简单易懂的基础开始，这是基本的。该项目有一个简单的控制器和一个通过resources.groovy连接的java bean。无论我们做什么，我们似乎都无法正确连接bean，Grails抱怨bean属性不可写或者没有getter / setter ....

/* TestBean.groovy */
    class TestBean {    
        def message 
        String getMessage(){
            return message
        }
    }

/* resources.groovy */
import com.ofi.test.TestBean;

beans = {   
    helloWorldBean( TestBean){
        message = "HelloWorld"
    }   
}

/* TestController */
class TestController {

    def index = { }

    def helloWorldBean
    def show = {
        def message = helloWorldBean.message
        render message
    }
}

/* UrlMappings.groovy */
class UrlMappings {    
    static mappings = {

        "/test/$var"(controller:"Test"){
            action = [GET: "get"]
        }   
    }

项目编译，但是当应用程序在Eclipse中加载时我们收到以下错误消息（我们甚至无法访问控制器，TestBean配置失败）

2011-08-10 11:18:55,252 [main] ERROR context.GrailsContextLoader  - Error executing bootstraps: Error creating bean with name 'helloWorldBean': Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'message' of bean class [com.ofi.test.TestBean]: Bean property 'message' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'helloWorldBean': Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'message' of bean class [com.ofi.test.TestBean]: Bean property 'message' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
    at org.grails.tomcat.TomcatServer.start(TomcatServer.groovy:212)
    at grails.web.container.EmbeddableServer$start.call(Unknown Source)
    at _GrailsRun_groovy$_run_closure5_closure12.doCall(_GrailsRun_groovy:158)
    at _GrailsRun_groovy$_run_closure5_closure12.doCall(_GrailsRun_groovy)
    at _GrailsSettings_groovy$_run_closure10.doCall(_GrailsSettings_groovy:280)
    at _GrailsSettings_groovy$_run_closure10.call(_GrailsSettings_groovy)
    at _GrailsRun_groovy$_run_closure5.doCall(_GrailsRun_groovy:149)

Answer 1

由于您的bean是groovy bean，您甚至不需要访问者。以下应该没问题：

class TestBean {
    def message
}

在您的情况下，可能会发生错误，因为message字段的输入为def，但您的访问者输入为String。如果你必须有访问者，请尝试输入相同的访问者。

Answer 2

您可以在Bean类中添加更多字段，并将它们用于Controller like-

class TestBean {

    static constraints = {
    }

    String message
    String name
    def demo
}

resources.groovy中的Grails bean配置在Eclipse STS中失败

2 个答案: