WebService学习（二）

浅浅的花香味﹌ 2022-06-09 07:07 230阅读 0赞

## 前言 ##

相信通过上一篇介绍就会对WebService有一个大致的理解，今天主要搭建一个可以用在实际项目中的WebService框架。框架主要用到的是spring+mybatis，用MySQL数据库，数据库和表以及用到的数据自己建我就不说了，发布服务用的是jdk自带的jaxws（没有用cxf是因为依赖的包太多了）。

## 具体步骤 ##

先看一下整个项目的工程目录  
![这里写图片描述][SouthEast]  
1.第一步新建一个动态web工程，添加依赖的包（包含spring、mybatis等等）。如下图  
![这里写图片描述][SouthEast 1]  
2.第二步整合spring。在web.xml中加入spring容器加载。

<listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

spring配置文件applicationContext.xml如下

<?xml version="1.0" encoding="GBK"?>
    <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p" xmlns:websocket="http://www.springframework.org/schema/websocket" xmlns:util="http://www.springframework.org/schema/util" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring" xmlns:lang="http://www.springframework.org/schema/lang" xmlns:core="http://jax-ws.dev.java.net/spring/core" xsi:schemaLocation="http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-4.3.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd http://jax-ws.dev.java.net/spring/core http://jax-ws.dev.java.net/spring/core.xsd http://www.springframework.org/schema/websocket http://www.springframework.org/schema/websocket/spring-websocket-4.3.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.3.xsd http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
    
            
        <context:component-scan base-package="com.mycompany"></context:component-scan>
    
        
        <context:property-placeholder location="classpath:db.properties"/> 
    
        
        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">         
            <property name="driverClass" value="${jdbc.driver}"/>         
            <property name="jdbcUrl" value="${jdbc.url}"/>         
            <property name="user" value="${jdbc.username}"/>         
            <property name="password" value="${jdbc.password}"/>
              
            <property name="maxPoolSize" value="${jdbc.maxPoolSize}"/>  
              
            <property name="minPoolSize" value="${jdbc.minPoolSize}"/>  
              
            <property name="initialPoolSize" value="${jdbc.initialPoolSize}"/>  
              
            <property name="maxIdleTime" value="${jdbc.maxIdleTime}"/>  
              
            <property name="acquireIncrement" value="${jdbc.acquireIncrement}"/>  
              
            <property name="maxStatements" value="${jdbc.maxStatements}"/>  
              
            <property name="idleConnectionTestPeriod" value="${jdbc.idleConnectionTestPeriod}"/>        
        </bean> 
    
        
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="dataSource" />
            <property name="mapperLocations" value="classpath:/mappings/*.xml"/>
            <property name="configLocation" value="classpath:sqlMapConfig.xml" />
        </bean>
    
        
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="basePackage" value="com.mycompany.dao"/>
            <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>      
        </bean>
        
    
         
        
        <bean class="org.springframework.remoting.jaxws.SimpleJaxWsServiceExporter">
            <property name="baseAddress" value="http://10.4.125.84:8099/"/>
        </bean>
    
    </beans>

配置文件中各个bean的作用都加了注释，就不在重复了，下边附上数据库配置文件db.properties

#mysql database settings
    jdbc.type=mysql
    jdbc.driver=com.mysql.jdbc.Driver
    jdbc.url=jdbc:mysql://localhost:3306/test?
    jdbc.username=root
    jdbc.password=ABcd1234@
    
    
    #c3p0 setting
    jdbc.initialPoolSize=20  
    jdbc.maxPoolSize=100  
    jdbc.minPoolSize=10  
    jdbc.maxIdleTime=600  
    jdbc.acquireIncrement=5  
    jdbc.maxStatements=5  
    jdbc.idleConnectionTestPeriod=60

3.接下来整合mybatis。在上一步中spring配置文件已经将mybatis整合进去了，下面附上mybatis配置文件sqlMapConfig.xml，如下

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
    <configuration>
        
        <settings>
    
           <setting name="callSettersOnNulls" value="true"/>
    
           
           <setting name="cacheEnabled" value="true"/>
    
           
           <setting name="lazyLoadingEnabled" value="true"/>
    
           
           <setting name="aggressiveLazyLoading" value="true"/>
    
           
           <setting name="multipleResultSetsEnabled" value="true"/>
    
           
           <setting name="useColumnLabel" value="true"/>
    
           
           <setting name="useGeneratedKeys" value="false"/>
    
             
           <setting name="autoMappingBehavior" value="PARTIAL"/>
    
           
           <setting name="defaultExecutorType" value="SIMPLE"/>
    
           
           <setting name="mapUnderscoreToCamelCase" value="true"/>
    
           
           <setting name="localCacheScope" value="SESSION"/>
    
           
           <setting name="jdbcTypeForNull" value="NULL"/>
        </settings>
        <typeAliases>
            <typeAlias alias="HashMaps" type="java.util.HashMap" />
        </typeAliases>
    </configuration>

4.一般开发都需要记录日志，加入log4j日记文件log4j.properties，如下

log4j.rootLogger=INFO,stdout,R
    log4j.appender.stdout=org.apache.log4j.ConsoleAppender  
    log4j.appender.stdout.layout=org.apache.log4j.PatternLayout  
    log4j.appender.stdout.layout.ConversionPattern=%d{yyyy.MM.dd HH:mm:ss} %p [%c] -%m%n 
    
    log4j.appender.R=org.apache.log4j.DailyRollingFileAppender
    log4j.appender.R.File=../logs/webservice.log 
    log4j.appender.R.layout=org.apache.log4j.PatternLayout
    log4j.appender.R.layout.ConversionPattern=%d{yyyy.MM.dd HH:mm:ss} %p [%c] -%m%n 
    
    log4j.logger.com.ibatis=info  
    log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=info  
    log4j.logger.com.ibatis.common.jdbc.ScriptRunner=info  
    log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=info  
    log4j.logger.java.sql.Statement=info  
    log4j.logger.java.sql.PreparedStatement=info,stdout

5.完成以上步骤，基本上框架就搭建好了，下面写个测试类，实现的功能是通过员工id查询员工姓名。

HelloWorldService.java代码如下

package com.mycompany.service;
    
    import javax.jws.WebMethod;
    import javax.jws.WebService;
    
    @WebService(targetNamespace="http://service.mycompany.com/")
    @SOAPBinding(style=Style.RPC)
    public interface HelloWorldService { 
    
          @WebResult(name="String")
          @WebMethod
          public String sayHello(@WebParam(name = "id") int id);
    }

HelloWorldServiceImpl.java代码如下

package com.mycompany.service;
    
    import javax.annotation.Resource;
    import javax.jws.WebService;
    import org.apache.log4j.Logger;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    import com.mycompany.dao.HelloWorldDao;
    
    @Service
    @WebService(serviceName="HelloWorldService",targetNamespace="http://service.mycompany.com/",endpointInterface="com.mycompany.service.HelloWorldService")  
    public class HelloWorldServiceImpl implements HelloWorldService { 
    
        @Resource
        private HelloWorldDao helloWorldDao;
    
        private static Logger logger = Logger.getLogger(HelloWorldServiceImpl.class);
    
        @Override
        public String sayHello(int id) {
    
            logger.info("----接口查询开始----");
    
            String name = helloWorldDao.getName(id);
    
            logger.info("----接口查询结束----");
    
            return "Hello," + name;
        }
    
    }

HelloWorldDao .java代码如下

package com.mycompany.dao;
    
    public interface HelloWorldDao {
    
        public String getName(int id);
    }

hello-mapper.xml代码如下

<?xml version="1.0" encoding="GBK"?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    
    <mapper namespace="com.mycompany.dao.HelloWorldDao">
    
        <select id="getName" parameterType="int" resultType="string">
            select name from user  where id = #{id}
        </select>
    
    </mapper>

6.以上全部做完，一个简单的WebService就算是完成了，我们在test包下建一个测试类TestService.java ,代码如下

package com.mycompany.test;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    import com.mycompany.service.HelloWorldServiceImpl;
    
    public class TestService {
    
        public static void main(String[] args) {
            ApplicationContext app = new ClassPathXmlApplicationContext("classpath:applicationContext.xml"); 
            HelloWorldServiceImpl helloWorldService = app.getBean(HelloWorldServiceImpl.class);
            String name = helloWorldService.sayHello(56040);
            System.out.println(name);
        }
    
    }

通过运行Main方法可以知道自己写的接口是否正确。

7.以上都没有问题就将项目用tomcat启动，注意在spring配置文件中配置了启动文本项目的自己电脑的ip和端口，如下

注意一定是自己电脑的ip，而不是localhost，端口也是没有被占用的端口。

8.如果项目顺利启动没有报错，就可以在浏览器里输入地址  
`http://10.4.125.84:8099/HelloWorldService?wsdl`  
如果看到如下图所示  
![这里写图片描述][SouthEast 2]  
那么一个WebService项目就完成了

9.关于如何生成客户端代码，情况上一篇博客中推荐的第一篇博客。

[SouthEast]: /images/20220609/f6b47688352149868d7978d6c2a199d9.png
[SouthEast 1]: /images/20220609/7fa60d857f384cbbbdbbee96104e9cf2.png
[SouthEast 2]: /images/20220609/7b0b68f3d2cd46b8a58cde6ebc01450e.png