第一个Spring restful 项目-从开发到部署

环境

开发环境

Windows7旗舰版

eclipse 版本

Eclipse Java EE IDE for Web Developers.

Version: Luna Service Release 2 (4.4.2)

部署环境

tomcat 版本

tomcat 7.0.65

Linux 环境

Centos7 64 位

Java版本

java version “1.7.0_79”

开发

目标：用spring 支持 restful

项目目录

springREST

src

demo

Demo.java

WebRoot

WEB-INF

web.xml

rest-servlet.xml

项目文件

web.xml 配置spring支持

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> <display-name>SpringREST</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/rest-servlet.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>rest</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>rest</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>

rest-servlet.xml 配置rest支持

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd" default-lazy-init="true">
<context:component-scan base-package="demo" />
</beans>

java代码 Demo.java

package com.liqiu.controller;

import java.io.IOException;

import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/demo")
public class Demo{
@RequestMapping(value = "/{id}")
public void get(@PathVariable String id,HttpServletResponse response) throws IOException {
response.getWriter().write(id);
}
}

项目部署

导出war文件



tomcat 安装

下载tomcat core linux 版

上传并解压

tar -zxvf apache-tomcat-7.0.65.tar.gz

mv apache-tomcat-7.0.65 /opt/tomcat

配置tomcat

在 TOMCAT_HOME/bin/catalina.sh 中加入java环境变量

export JAVA_HOME=/usr/java/jdk1.7.0_79
export     CLASSPATH=.:$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
export PATH=$PATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin

配置tomcat 用户

修改 TOMCAT_HOME/conf/tomcat-users.xml

<tomcat-users>
<role rolename="admin"/>
<role rolename="manager-script"/>
<role rolename="manager-gui"/>
<role rolename="manager-jmx"/>
<role rolename="manager-status"/>
<role rolename="admin-gui"/>
<role rolename="admin-script"/>

<user username="admin" password="admin" roles="manager-gui,manager-script,manager-jmx,manager-status,admin-gui,admin-script"/>
</tomcat-users>

配置tomcat环境变量 修改 /etc/profile

export TOMCAT_HOME=/usr/local/tomcat
export PATH=$PATH:$TOMCAT_HOME/bin

启动tomcat

startup.sh

关闭tomcat

shutdown.sh

登陆tomcat进行部署

访问 http://you_server:8080/

点击Manage APP 用刚才配置的用户名（admin）密码（admin）登陆

上传war文件 点击部署，即可完成部署

验证效果

访问 http://you_server:8080/SpringREST/rest/hello world

效果：

hello world

注意事项

开发环境和部署环境java版本应一致

如果tomcat能正常开启但是无法访问，通常是因为防火墙原因

关闭防火前：

systemctl stop firewalld.service

检查是否关闭：

systemctl status firewalld.service

如果tomcat启动报各种奇怪的错误，可能是因为web项目开发缺少相应的jar包，或者tomcat和spring某些版本jar包有冲突，可尝试更换jar包。