Spring.Net學習筆記(0)-錯誤匯總

1.錯誤一：ObjectDefinitionStoreException

“Spring.Objects.Factory.ObjectDefinitionStoreException”類型的未經處理的異常在 Spring.Core.dll 中發生

通過看詳細信息，原來是找不到文件

未能找到文件“F:\20160221\Demo\CPrj\bin\Debug\objects.xml”。

處理方式：將objects.xml的【復制到輸出目錄】設置為始終復制

2.錯誤二：annotLoadObjectTypeException

“Spring.Core.CannotLoadObjectTypeException”類型的未經處理的異常在 Spring.Core.dll 中發生

通過看詳細信息，原來是找不到對象的定義

Cannot resolve type [Person] for object with name 'Person' defined in file [F:\20160221\Demo\CPrj\bin\Debug\objects.xml] line 3

處理方式

<?xml version="1.0" encoding="utf-8" ?>
<objects xmlns="http://www.springframework.net">
  <object id="Person" type="CPrj.Person,Cprj"></object>
</objects>

3.錯誤三：ConfigurationErrorsException

“System.Configuration.ConfigurationErrorsException”類型的未經處理的異常在 Spring.Core.dll 中發生

查看詳細信息，原來是找不到配置文件(obejcts拼錯了)

Error creating context 'spring.root': 未能找到文件“F:\20160221\Demo\CPrj\bin\Debug\obejcts.xml”。

處理方式

<spring>
    <context>
      <resource uri="file://objects.xml"></resource>
    </context>
  </spring>

4.錯誤四：TypeInitializationException

“System.TypeInitializationException”類型的未經處理的異常在 CPrj.exe 中發生

查看詳細信息

“Spring.Context.Support.ContextRegistry”的類型初始值設定項引發異常。

處理方式：把<startup>放到最后一個節點

<?xml version="1.0" encoding="utf-8" ?>
<configuration>

  <configSections>
    <sectionGroup name="spring">
      <section name="context" type="Spring.Context.Support.ContextHandler,Spring.Core"></section>
    </sectionGroup>
  </configSections>

  <spring>
    <context>
      <resource uri="file://objects.xml"></resource>
    </context>
  </spring>

  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
  </startup>
</configuration>

5.使用屬性注入時，報了如下錯

Error creating context 'spring.root': 'MovieFinder' node cannot be resolved for the specified context [Spring.Examples.MovieFinder.MovieLister

意思是說，在MovieLister類中，找不到屬性名為MovieFinder項

看了下配置文件，如下

<objects xmlns="http://www.springframework.net">
      <object name="MyMovieLister" type="Spring.Examples.MovieFinder.MovieLister,Spring.Examples.MovieFinder">
        <property name="MovieFinder" ref="MyMovieFinder"></property>
      </object>
      <object name="MyMovieFinder" type="Spring.Examples.MovieFinder.MovieFinder,Spring.Examples.MovieFinder"></object>
      <!--<description>An example that demonstrates simple Ioc features</description>-->
    </objects>

再看下MovieLister類

public class MovieLister
{
    private MovieFinder finder;
    public List<Movie> MoviesDirectedBy()
    {
        List<Movie> allMovies = finder.FindAll();
        return allMovies;
    }
}

發現問題了，不是MovieFinder，是finder；配置文件改成如下，就OK了

<objects xmlns="http://www.springframework.net">
  <object name="MyMovieLister" type="Spring.Examples.MovieFinder.MovieLister,Spring.Examples.MovieFinder">
    <property name="finder" ref="MyMovieFinder"></property>
  </object>
  <object name="MyMovieFinder" type="Spring.Examples.MovieFinder.MovieFinder,Spring.Examples.MovieFinder"></object>
  <!--<description>An example that demonstrates simple Ioc features</description>-->
</objects>

6.在構造函數注入是報如下錯

Error creating context 'spring.root': Cannot instantiate a class that does not have a no-argument constructor [Spring.Examples.MovieFinder.ColonMovieFinder].

原來Spring容器默認在加載的時候，都會嘗試預先創建對象。

處理方式一：給ColonMovieFinder一個無參數的構造函數

處理方式二：在配置文件中提供相應的構造函數參數

<objects xmlns="http://www.springframework.net">
  <object name="MyMovieLister" type="Spring.Examples.MovieFinder.MovieLister,Spring.Examples.MovieFinder">
    <property name="finder" ref="MyMovieFinder"></property>
  </object>
  <object name="MyMovieFinder" type="Spring.Examples.MovieFinder.MovieFinder,Spring.Examples.MovieFinder"></object>
  <object name="AnotherMovieFinder" type="Spring.Examples.MovieFinder.ColonMovieFinder,Spring.Examples.MovieFinder">
    <constructor-arg index="0" value="movies.txt"></constructor-arg>
    <constructor-arg index="1" value="arg2"></constructor-arg>
  </object>
  <!--<description>An example that demonstrates simple Ioc features</description>-->
</objects>

7.xml錯誤

錯誤代碼如下

Error creating context 'spring.root': Unable to locate Spring NamespaceHandler for XML schema namespace []

看了下xml

<objects>
  <object name="person" type="SpringNetSetDi.Person,SpringNetSetDi">
    <property name="RealName" value=""></property>
  </object>

  <object name="animal" type="SpringNetSetDi.Animal,SpringNetSetDi">
    <property name="TypeList">
      <list element-type="string">
        <value>哺乳類</value>
        <value>鳥類</value>
        <value>爬行類</value>
        <value>昆蟲類</value>
        <value>兩棲類</value>
      </list>
    </property>
  </object>
</objects>

處理方式，objects處加上屬性

<objects  xmlns="http://www.springframework.net">
  <object name="person" type="SpringNetSetDi.Person,SpringNetSetDi">
    <property name="RealName" value=""></property>
  </object>

  <object name="animal" type="SpringNetSetDi.Animal,SpringNetSetDi">
    <property name="TypeList">
      <list element-type="string">
        <value>哺乳類</value>
        <value>鳥類</value>
        <value>爬行類</value>
        <value>昆蟲類</value>
        <value>兩棲類</value>
      </list>
    </property>
  </object>
</objects>

8.方法注入時，掉進的坑

事情來源，以下怎么改代碼，方法都不能被替換

<object name="replaceValue" type="SpringNetMethodDi.SuperMarket,SpringNetMethodDi"></object>
<object name="realOp" type="SpringNetMethodDi.RealOp,SpringNetMethodDi">
  <replaced-method name="Buy" replacer="replaceValue">
    <arg-type match="string"/>
  </replaced-method>
</object>

以下代碼是可以運行的，發現不同了沒

<object name="replaceValue" type="SpringNetMethodDi.SuperMarket,SpringNetMethodDi"></object>
<object name="realOp" type="SpringNetMethodDi.RealOp,SpringNetMethodDi">
  <replaced-method name="Buy" replacer="replaceValue">
    <arg-type match="String"/>
  </replaced-method>
</object>

不同之處，竟然是string和String