java 研发部分常见错误解决（1）

最新推荐文章于 2020-05-11 18:01:24 发布

阿杰_Jie

最新推荐文章于 2020-05-11 18:01:24 发布

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转自： http://blog.youkuaiyun.com/bq_cui/article/details/1520255

1、Use of the same entity name twice: User
   有两份User.class
   清除build目录下的内容;
   删除src/org目录


2、could not instantiate ClassValidator
   删除resources/WEB-INF/classes目录

3、2006-12-01 11:00:14,781 DEBUG [org.jboss.seam.deployment.Scanner] found: com/arcmind/jsfquickstart/tags/IsBooleanHandler.class
2006-12-01 11:00:14,781 DEBUG [org.jboss.seam.deployment.Scanner] could not load class (missing dependency): com.arcmind.jsfquickstart.tags.IsBooleanHandler
java.lang.NoClassDefFoundError: com/sun/facelets/tag/TagHandler

解决：
    resources/META-INF/application.xml中，</application>之前增加
    
<module>
     <java>commons-fileupload-1.1.jar</java>
</module>
<module>
     <java>commons-io-1.2.jar</java>
</module>
<module>
     <java>tomahawk.jar</java>
</module>
<module>
     <java>el-api.jar</java>
</module>
<module>
     <java>el-ri.jar</java>
</module>
<module>
     <java>jsf-facelets.jar</java>
</module>

4、Failed to find module file: commons-fileupload-1.1.jar
   Failed to find module file: commons-fileupload-1.1.jar
   解决：
   在
    <fileset id="seam.jar"
            dir="${imported.basedir}"
            description="the main Seam jar">
        <include name="${name}.jar" />
    </fileset>
   之后加上

    <fileset id="commons-fileupload-1.1.jar"
            dir="${lib.dir}"
            description="commons-fileupload-1.1.jar">
        <include name="commons-fileupload-1.1.jar" />
    </fileset>


    <fileset id="commons-io-1.2.jar"
            dir="${lib.dir}"
            description="commons-io-1.2.jar">
        <include name="commons-io-1.2.jar" />
    </fileset>


    <fileset id="tomahawk.jar"
            dir="${lib.dir}"
            description="tomahawk.jar">
        <include name="tomahawk.jar" />
    </fileset>


     <fileset id="el-api.jar"
             dir="${lib.dir}"
             description="el-api.jar">
         <include name="el-api.jar" />
     </fileset>



     <fileset id="el-ri.jar"
             dir="${lib.dir}"
             description="el-ri.jar">
         <include name="el-ri.jar" />
     </fileset>



     <fileset id="jsf-facelets.jar"
             dir="${lib.dir}"
             description="jsf-facelets.jar">
         <include name="jsf-facelets.jar" />
     </fileset>

   在
    <zipfileset id="example.tomcat.seam.jar"
            prefix="WEB-INF/lib"
            dir="${imported.basedir}">
        <include name="${name}.jar" />
    </zipfileset>
   之后加上


    <path id="build.classpath">
        <path refid="example.path"/>
        <fileset refid="lib"/>
        <fileset refid="seam.jar"/>
    <fileset refid="commons-fileupload-1.1.jar"/>
        <fileset refid="commons-io-1.2.jar"/>
    <fileset refid="tomahawk.jar"/>
    <fileset refid="el-api.jar"/>
    <fileset refid="el-ri.jar"/>
    <fileset refid="jsf-facelets.jar"/>
    </path>

   修改target name="ear"
     
    <target name="ear" depends="ejb3, war">
        <jar destfile="${build.dir}/${example.name}.ear">
            <fileset refid="seam.jar"/>


        <fileset refid="commons-fileupload-1.1.jar"/>
        <fileset refid="commons-io-1.2.jar"/>
        <fileset refid="tomahawk.jar"/>
        <fileset refid="el-api.jar"/>
        <fileset refid="el-ri.jar"/>
        <fileset refid="jsf-facelets.jar"/>


            <zipfileset dir="${build.dir}">
                <include name="${example.name}.jar"/>
            </zipfileset>
            <zipfileset dir="${build.dir}">
                <include name="${example.name}.war"/>
            </zipfileset>
            <zipfileset refid="example.ear.resources"/>
            <fileset refid="example.ejb3.lib"/>
        </jar>
    </target>

5、/WEB-INF/facelets/tags/field.xhtml @17,75 value="${arc:getFieldLabel(fieldName,namespace)}" Function 'arc:getFieldLabel' not found