我是蚂蚁脚本的新手。我不知道，如何使用ant脚本写入xml文件。
我想将数据库信息写入Tomcat context.xml文件。
我编写了ant脚本来读取用户的数据库信息。
我已将所有必要的信息存储到这些属性中
{jdbc.myDatabase.driver}
{jdbc.myDatabase.url}
{jdbc.myDatabase.user}
{jdbc.myDatabase.password}
现在，我如何在context.xml文件中写上述信息。
Context.xml文件看起来像这样。
<?xml version='1.0' encoding='utf-8'?>
<Context>
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<WatchedResource>${catalina.base}/conf/web.xml</WatchedResource>
</Context>
写完db信息之后，它应该是这样的。
新文件context.xml应如下所示。
<?xml version='1.0' encoding='utf-8'?>
<Context>
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<WatchedResource>${catalina.base}/conf/web.xml</WatchedResource>
<Resource name="jdbc/monitords"
auth="Container"
type="javax.sql.DataSource"
factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
driverClassName="oracle.jdbc.OracleDriver"
url="jdbc:oracle:thin:@192.168.15.194:1521:orcl"
username="tomcat_dbrds"
password="cmxinfa"
jdbcInterceptors="org.apache.tomcat.jdbc.pool.interceptor.ConnectionState;org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer;org.apache.tomcat.jdbc.pool.interceptor.SlowQueryReport(threshold=1500)"
/>
</Context>
我会感谢任何建议，有用的链接。请帮忙。
更新1：添加了bild.xml文件
<project name="TestWebApp" default="collect-user-inputs" basedir="." xmlns:contrib="antlib:net.sf.antcontrib">
<!-- set global properties for this build -->
<property name="resourcedir" location="resource"/>
<property name ="tomcatServer" location ="apache-tomcat-server"/>
<property name ="context_xml" location ="${tomcatServer}/conf"/>
<property name="build" location="build"/>
<property name="temp" location="_tmp"/>
<property name="lib" location ="lib"/>
<property name="installdir" location="install"/>
<property name="outputdir" location="output"/>
<property name="build.props" value="build.properties"/>
<property name="ui.log4j.props" value="log4j.properties"/>
<property name="dependencyfinder.home" value="."/>
<property name="log.path" value=""/>
<!-- Collects all the required inputs from the User -->
<target name="collect-user-inputs" unless="${build.props.exists}">
<property name="jdbc.WebApp.driver" value="oracle.jdbc.driver.OracleDriver"/>
<input message="Enter hostname/IP for TestWebApp database" addproperty="jdbc.WebApp.url.host" defaultvalue="localhost"/>
<input message="Enter the port number for database server where TestWebApp schema was created" addproperty="jdbc.WebApp.url.port" defaultvalue="1521"/>
<input message="Select Connection type for TestWebApp schema (1) SID, (2) Service Name" addproperty="jdbc.WebApp.conn.type" defaultvalue="SID" validargs="1,2"/>
<contrib:if>
<contrib:equals arg1="${jdbc.WebApp.conn.type}" arg2="1"/>
<contrib:then>
<property name="jdbc.WebApp.conn.type.name" value="SID"/>
</contrib:then>
<contrib:elseif>
<contrib:equals arg1="${jdbc.WebApp.conn.type}" arg2="2"/>
<contrib:then>
<property name="jdbc.WebApp.conn.type.name" value="Service Name"/>
</contrib:then>
</contrib:elseif>
</contrib:if>
<input message="Enter ${jdbc.WebApp.conn.type.name} for database server where TestWebApp schema was created" addproperty="jdbc.WebApp.url.sid" defaultvalue="orcl"/>
<contrib:if>
<contrib:equals arg1="${jdbc.WebApp.conn.type}" arg2="1"/>
<contrib:then>
<contrib:var name="jdbc.WebApp.url" value="jdbc:oracle:thin:@${jdbc.WebApp.url.host}:${jdbc.WebApp.url.port}:${jdbc.WebApp.url.sid}"/>
<echo message="WebApp jdbc.WebApp.url : ${jdbc.WebApp.url}" />
</contrib:then>
<contrib:elseif>
<contrib:equals arg1="${jdbc.WebApp.conn.type}" arg2="2"/>
<contrib:then>
<contrib:var name="jdbc.WebApp.url" value="jdbc:oracle:thin:@${jdbc.WebApp.url.host}:${jdbc.WebApp.url.port}/${jdbc.WebApp.url.sid}"/>
<echo message="WebApp jdbc.WebApp.url : ${jdbc.WebApp.url}" />
</contrib:then>
</contrib:elseif>
</contrib:if>
<input message="Enter TestWebApp database username" addproperty="jdbc.WebApp.user" defaultvalue=" _Monitor"/>
<input message="Enter password for ${jdbc.WebApp.user}${line.separator}" addproperty="jdbc.WebApp.password">
<handler classname="org.apache.tools.ant.input.SecureInputHandler"/>
</input>
<echo message="Getting ORS name from ${jdbc.WebApp.user}@${jdbc.WebApp.url.host}:${jdbc.WebApp.url.port}/${jdbc.WebApp.url.sid}..."/>
<tempfile property="temp.properties" prefix="temp_" suffix=".properties"/>
<property file="${temp.properties}"/>
<delete file="${temp.properties}"/>
<condition property="schema_user_set" else="false">
<isset property="${jdbc.hub.user}"/>
</condition>
<condition property="isORSSchemaSet">
<not>
<equals arg1="${jdbc.hub.user}" arg2="" trim="true"/>
</not>
</condition>
<antcall target="failed_getting_ors_schema"/>
<property name="jdbc.hub.driver" value="oracle.jdbc.driver.OracleDriver"/>
<input message="Enter hostname/IP ${jdbc.hub.user}" addproperty="jdbc.hub.url.host" defaultvalue="localhost"/>
<input message="Enter the port number of Database server ${jdbc.hub.user} is created " addproperty="jdbc.hub.url.port" defaultvalue="1521"/>
<input message="Select Connection type for Database (1) SID (2) Service Name" addproperty="jdbc.hub.conn.type" defaultvalue="SID" validargs="1,2"/>
<contrib:if>
<contrib:equals arg1="${jdbc.hub.conn.type}" arg2="1"/>
<contrib:then>
<property name="jdbc.hub.conn.type.name" value="SID"/>
</contrib:then>
<contrib:elseif>
<contrib:equals arg1="${jdbc.hub.conn.type}" arg2="2"/>
<contrib:then>
<property name="jdbc.hub.conn.type.name" value="Service Name"/>
</contrib:then>
</contrib:elseif>
</contrib:if>
<input message="Enter the ${jdbc.hub.conn.type.name} of the database where ORS ${jdbc.hub.user} is created" addproperty="jdbc.hub.url.sid" defaultvalue="orcl"/>
<contrib:if>
<contrib:equals arg1="${jdbc.hub.conn.type}" arg2="1"/>
<contrib:then>
<contrib:var name="jdbc.hub.url" value="jdbc:oracle:thin:@${jdbc.hub.url.host}:${jdbc.hub.url.port}:${jdbc.hub.url.sid}"/>
</contrib:then>
<contrib:elseif>
<contrib:equals arg1="${jdbc.hub.conn.type}" arg2="2"/>
<contrib:then>
<contrib:var name="jdbc.hub.url" value="jdbc:oracle:thin:@${jdbc.hub.url.host}:${jdbc.hub.url.port}/${jdbc.hub.url.sid}"/>
</contrib:then>
</contrib:elseif>
</contrib:if>
<!--<input message="Enter password for ${jdbc.hub.user}${line.separator}" addproperty="jdbc.hub.password">
<handler classname="org.apache.tools.ant.input.SecureInputHandler"/>
</input> -->
<property name="jdbc.hub.url" value="jdbc:oracle:thin:@${jdbc.hub.url.host}:${jdbc.hub.url.port}/${jdbc.hub.url.sid}"/>
<input message="Enter License Key" addproperty="WebApp.license"/>
<antcall target="tomcat-server-xml"/>
</target>
<target name="tomcat-server-xml">
<echo message ="tomcat-server-xml is called"/>
<xmltask source="${context_xml}/context.xml" dest="${context_xml}/context.xml">
<replace path="//*[local-name()='url']/text()" withText="${jdbc.WebApp.url}"/>
<replace path="//*[local-name()='username']/text()" withText="${jdbc.WebApp.user}"/>
<replace path="//*[local-name()='password']/text()" withText="${jdbc.WebApp.password}"/>
</xmltask>
</target>
</project>
答案 0 :(得分：1)
为context.xml创建模板：
<?xml version='1.0' encoding='utf-8'?>
<Context>
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<WatchedResource>${catalina.base}/conf/web.xml</WatchedResource>
<Resource name="jdbc/monitords"
auth="Container"
type="javax.sql.DataSource"
factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
driverClassName="${jdbc.myDatabase.driver}"
url="${jdbc.myDatabase.url}"
username="${jdbc.myDatabase.user}"
password="${jdbc.myDatabase.password}"
jdbcInterceptors="org.apache.tomcat.jdbc.pool.interceptor.ConnectionSta te;org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer;org.apach e.tomcat.jdbc.pool.interceptor.SlowQueryReport(threshold=1500)"
/>
</Context>
然后使用以下目标生成一个真正的context.xml，基于它：
<target name="generate.context">
<!-- Properties (might be defined elsewhere) -->
<property name="jdbc.myDatabase.driver" value="oracle.jdbc.OracleDriver"/>
<property name="jdbc.myDatabase.url" value="jdbc:oracle:thin:@192.168.15.194:1521:orcl"/>
<property name="jdbc.myDatabase.user" value="tomcat_dbrds"/>
<property name="jdbc.myDatabase.password" value="cmxinfa"/>
<!-- Copy context.xml.template to context.xml, expanding the properties in the process -->
<copy file="context.xml.template" tofile="context.xml">
<filterchain>
<filterreader classname="org.apache.tools.ant.filters.ExpandProperties"/>
</filterchain>
</copy>
</target>