平时工作开发中，常见问题解决方案收集整理（持续更新）

来源：互联网发布：sys wait.h windows 编辑：程序博客网时间：2024/05/16 09:13

1、Maven项目包如下错误的解决方案

Dynamic Web Module 3.0 requires Java 1.6 or newer

I’m using STS and I configured my Web application to use Maven but, when I try to use Maven > Update project configuration, I’m getting this really annoying project error:

Dynamic Web Module 3.0 requires Java 1.6 or newer. [...] Maven WTP Configuration Problem One or more constraints have not been satisfied.

STS/Eclipse are configured to use Java 1.6 but my project apparently isn’t. So I go change that, but it doesn’t fix that error, and any time I update project config with Maven, it’s back to using JRE 1.5 and my Java source files are no longer on the build path as source files. This because the Maven compiler plugin doesn’t use Eclipse settings and just imposes its own defaults, i.e. Java 5, unless otherwise configured by a POM. And since a “Dynamic Web Project” uses Servlet 3.0 it requires Java 6.
To fix, just add under the top-level POM:

<build><plugins>   <plugin>  <groupId>org.apache.maven.plugins</groupId>  <artifactId>maven-compiler-plugin</artifactId>  <version>2.1</version>  <configuration> <source>1.6</source> <target>1.6</target>  </configuration>   </plugin></plugins> </build>

2、

0 0