Question

我已经设置了一个简单的maven项目，其中包含以下依赖项：

<dependencies>
   <dependency>
      <groupId>org.glassfish</groupId>
      <artifactId>javax.faces</artifactId>
      <version>2.2.2</version>
   </dependency>
   <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
   </dependency>
   <dependency>
      <groupId>javax.el</groupId>
      <artifactId>javax.el-api</artifactId>
      <version>3.0.1-b04</version>
      <scope>provided</scope>
   </dependency>
   <dependency>
      <groupId>javax.servlet.jsp.jstl</groupId>
      <artifactId>jstl-api</artifactId>
      <version>1.2</version>
   </dependency>

   <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-entitymanager</artifactId>
      <version>4.3.6.Final</version>
   </dependency>

   <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-c3p0</artifactId>
      <version>4.3.6.Final</version>
   </dependency>

   <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-validator</artifactId>
      <version>5.1.2.Final</version>
   </dependency>

   <dependency>
      <groupId>org.primefaces</groupId>
      <artifactId>primefaces</artifactId>
      <version>5.1</version>
   </dependency>

</dependencies>

这页：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://xmlns.jcp.org/jsf/html"
      xmlns:ui="http://xmlns.jcp.org/jsf/facelets"
      xmlns:f="http://xmlns.jcp.org/jsf/core">
<h:body onkeydown="alert('You pressed some key!')">
    <h:outputLabel value="Hello, young fellows!"/>
</h:body>
</html>

这是生成的html，注意没有方法的body标签：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"><body><label>Hello, young fellows!</label></body>
</html>

我尝试通过更改pom.xml中的依赖项版本将primefaces版本回滚到4.0，如下所示：

<dependency>
   <groupId>org.primefaces</groupId>
   <artifactId>primefaces</artifactId>
   <version>4.0</version>
</dependency>

然后它按预期工作：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"><body onkeydown="alert('You pressed some key!')"><label>Hello, young fellows!</label></body>
</html>

有什么问题？这是PF 5.1或其他什么的错误吗？

Answer 1

从5.0开始，h:body在PrimeFaces中有renderer，BodyRenderer。

在该渲染器的encodeBegin中，传递attributes数组，HTML.BODY_ATTRS。

public static final String[] BODY_ATTRS = {
    "dir",
    "lang",
    "style",
    "onload",
    "onunload"
};

正如您所看到的，由于某种原因，此数组并未涵盖h:body标记的所有实际属性，因此会忽略某些属性。

为了避免这个问题，你可以简单地将该渲染器扩展为一个接受所有实际属性的渲染器。

public class CustomBodyRenderer extends BodyRenderer{

   //our array with all the attributes of h:body tag
   public static final String[] BODY_ATTRS = {
       "dir",
       "lang",
       "onclick",
       "ondblclick",
       "onkeydown",
       "onkeypress",
       "onkeyup",
       "onmousedown",
       "onmousemove",
       "onmouseout",
       "onmouseover",
       "onmouseup",
       "style",
       "title",
       "onload",
       "onunload"
   };

   @Override
   public void encodeBegin(FacesContext context, UIComponent component) throws IOException {
       ResponseWriter writer = context.getResponseWriter();
       String clientId = component.getClientId(context);
       writer.startElement("body", component);

       if (shouldWriteId(component)) {
           writer.writeAttribute("id", clientId, "id");
       }

       String styleClass = (String) component.getAttributes().get("styleClass");
       if (styleClass != null && styleClass.length() != 0) {
           writer.writeAttribute("class", styleClass, "styleClass");
       }
       //the only changed line from the original renderer
       renderPassThruAttributes(context, component, BODY_ATTRS);
   }

}

然后在 faces-config

中注册

<render-kit>
    <renderer>
        <component-family>javax.faces.Output</component-family>
        <renderer-type>javax.faces.Body</renderer-type>
        <renderer-class>com.hatemalimam.CustomBodyRenderer</renderer-class>
    </renderer>
</render-kit>

通过这种方式，您可以在“最小”变化中获得预期结果。

我已在跟踪器上提交了issue。

<强>更新 这已在PF 5.2中修复。

从4.0升级到Primefaces 5.1后，未呈现正文属性（onkeydown，onkeyup ...）

1 个答案: