如何更改tomcat编译器 [英] How to change tomcat compiler

问题描述

我正在尝试使用新的Java 7字符串开关功能.

I'm trying to use the new Java 7 switch on strings feature.

但是Tomcat没有合作.

But Tomcat is not cooperating.

我已经确定tomcat在Java 7下运行，但是看来它没有在Java 7下编译.

I've made sure that tomcat is running under java 7 but it seems that it's not compiling under it.

我已将以下内容添加到web.xml文件中的jsp servlet条目下

I've added the following to the web.xml file, under the jsp servlet entry

    <init-param>
        <param-name>compiler</param-name>
        <param-value>C:/Program Files/Java/jdk1.7.0/bin/javac.exe</param-value>
    </init-param>

但它似乎并不能解决问题.

but it doesn't seem to do the trick.

任何提示将不胜感激.

推荐答案

我们正在运行Tomcat 6，但存在相同的问题.我们的解决方案是:

We are running Tomcat 6 and had the same problem. Our solution was to:

• 将tomcat/lib/ecj-3.3.1.jar替换为ecj-3.7.2.jar(可取自最新的Tomcat 7版本)；

• 将此添加到tomcat/conf/web.xml

• replace tomcat/lib/ecj-3.3.1.jar with ecj-3.7.2.jar (can be taken from the latest Tomcat 7 release);

• add this to tomcat/conf/web.xml

...
<servlet>
  <servlet-name>jsp</servlet-name>
  <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
  <init-param>
      <param-name>fork</param-name>
      <param-value>false</param-value>
  </init-param>
  <init-param>
      <param-name>xpoweredBy</param-name>
      <param-value>false</param-value>
  </init-param>
  <init-param>                                    <!-- this should be added -->
      <param-name>compilerSourceVM</param-name>
      <param-value>1.7</param-value>
  </init-param>
  <init-param>
      <param-name>compilerTargetVM</param-name>
      <param-value>1.7</param-value>
  </init-param>                                   <!-- last added line -->
  <load-on-startup>3</load-on-startup>
</servlet>

当然，更简单的选择是安装Tomcat 7，但这可能并不是每个人的选择.

The simpler alternative is, of course, to install Tomcat 7 but this might not be an option for everyone.

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