在WTP项目中无损加入Maven依赖管理
现在Eclipse的最新版本是3.6，现在的WTP功能也越来越大，相比MyEclipse那个庞然大物丝毫不逊色。之前在开发过程中都是手工维 护库的依赖，由于在项目中使用到Spring、OpenJPA、Freemarker等等，尤其是其中使用到的commons包，弄得不好就是版本不对或 者找不到class，一直想用Maven进行依赖的管理。但是m2eclipse插件很难与WTP结合，使用 eclipse:eclipse建立出来的WTP项目又与WTP默认的不一致，并且在tomcat调试的时候又非常的麻烦。由于我只是想简单的使用 Maven的包依赖管理，如果有可能在把war的生成加入就最好了。考虑到这两个功能相对简单，所以尝试了在现有WTP项目中无损的加入Maven的管理 功能。下面是过程的记录，在Ubuntu10.04 Eclipse3.6中测试成功。
1、安装m2eclipse
虽然问题多多，但是毕竟可以在eclipse里面使用
2、新建WTP项目
废话不多说，上张图而已
3、新建pom.xml文件
里面加入了我常用的一些包，大家不用可以删除。重点标注部分
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.strong</groupId>
<artifactId>MavenTest</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>3.0.4.RELEASE</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.13</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>3.0.4.RELEASE</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>3.0.4.RELEASE</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-core</artifactId>
<version>3.0.3.RELEASE</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>3.0.3.RELEASE</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.openjpa</groupId>
<artifactId>openjpa</artifactId>
<version>2.0.1</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.15</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>1.4</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>3.0.4.RELEASE</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
<version>2.3.16</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
</dependencies>
<!-- =============================================== -->
<build>
<finalName>MavenTest</finalName>
<directory>build</directory>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<configuration>
<webappDirectory>WebContent</webappDirectory>
<warSourceDirectory>WebContent</warSourceDirectory>
<webXml>WebContent/WEB-INF/web.xml</webXml>
</configuration>
<version>2.1</version>
</plugin>
</plugins>
</build>
<!-- =============================================== -->
</project>
4、修改项目根目录下的.project和.classpath文件
因为要把maven管理的包加入的路径中，所以手工修改内容如下：
.project 增加了标注部分
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>MavenTest</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.eclipse.wst.jsdt.core.javascriptValidator</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.wst.common.project.facet.core.builder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.wst.validation.validationbuilder</name>
<arguments>
</arguments>
</buildCommand>
<!-- ========================================= -->
<buildCommand>
<name>org.maven.ide.eclipse.maven2Builder</name>
<arguments>
</arguments>
</buildCommand>
<!-- ========================================= -->
</buildSpec>
<natures>
<nature>org.eclipse.jem.workbench.JavaEMFNature</nature>
<nature>org.eclipse.wst.common.modulecore.ModuleCoreNature</nature>
<nature>org.eclipse.wst.common.project.facet.core.nature</nature>
<nature>org.eclipse.jdt.core.javanature</nature>
<nature>org.eclipse.wst.jsdt.core.jsNature</nature>
<!-- ========================================= -->
<nature>org.maven.ide.eclipse.maven2Nature</nature>
<!-- ========================================= -->
</natures>
</projectDescription>
.classpath 增加了标注部分
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" path="src" />
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/jdk">
<attributes>
<attribute name="owner.project.facets" value="java" />
</attributes>
</classpathentry>
<classpathentry kind="con" path="org.eclipse.jst.server.core.container/org.eclipse.jst.server.tomcat.runtimeTarget/Apache Tomcat v6.0">
<attributes>
<attribute name="owner.project.facets" value="jst.web" />
</attributes>
</classpathentry>
<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.web.container" />
<classpathentry kind="con" path="org.eclipse.jst.j2ee.internal.module.container" />
<!-- ========================================= -->
<classpathentry kind="con" path="org.maven.ide.eclipse.MAVEN2_CLASSPATH_CONTAINER" />
<!-- ========================================= -->
<classpathentry kind="output" path="build/classes" />
</classpath>
5、完成上述步骤后，保存修改的文件然后刷新会看到库路径变化如下
可以看到Maven Dependencies被加入进来了
6、install一下
7、收工了，检查一下路径和war文件
