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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                泛型在實際的工作中應用非常廣泛,關于泛型就不在這里贅述了,感興趣請戳[《重新認識泛型》](http://blog.csdn.net/liushuijinger/article/details/40488127)。項目中用到了如下的泛型: ~~~ public <T> T query(String sql, ResultSetHandler<T> rsh) throws SQLException { return this.query(sql, rsh, (Object[]) null); } ~~~ 以上代碼在Eclipse中可以編譯通過并成功運行,但是當你使用Maven編譯的時候就會報錯,錯誤信息如下: ~~~ xxx不兼容的類型 需要:xxx 找到: java.lang.Object ~~~ Eclipse編譯代碼時,使用的是自帶的JDT(Java Development Tools),而Maven默認使用的是JAVA_HONE中的javac,而javac相對JDT的檢查機制來說,更加的嚴格,所以導致Eclipse可以編譯通過,而用Maven編譯會報錯的結果。 解決方案有兩個: 第一個,借助Eclipse的JDT編譯 點擊 Eclipse –> Project –> Clean…? 使用JDT將源代碼編譯到target文件夾下,然后直接使用mvn package 打包即可(不要加clean)。 第二個,在pom.xml文件中為Maven指定用JDT來編譯(推薦) 修改pom.xml文件中maven-compiler-plugin的配置: ~~~ <build> ... <plugins> ... <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.1</version> <configuration> <source>${java.version}</source> <target>${java.version}</target> <compilerId>eclipse</compilerId> </configuration> <dependencies> <dependency> <groupId>org.codehaus.plexus</groupId> <artifactId>plexus-compiler-eclipse</artifactId> <version>2.2</version> </dependency> </dependencies> </plugin> .... </plugins> ... </build> ~~~ 保存,用Maven編譯,順利通過,你又看到了熟悉的提示信息: ~~~ [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 9.716 s [INFO] Finished at: 2015-03-31T12:35:12+09:00 [INFO] Final Memory: 18M/219M [INFO] ------------------------------------------------------------------------ ~~~
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