eclipse改编码集
1.windows->preferences->general->appearance->content type的java class file、text、word document
text可展开依次修改编码集
2.windows->preferences->web
3.windows->preferences->general->workspace
windows->preferences->java->compiler选择jdk版本
windows->preferences->java->installed jres点击添加选择jre安装路径
windows->preferences->server->runtimes environment选择服务器