Question

由于其中一个资源中存在冒号（＆＃39;：＆＃39;），因此无法创建Maven原型。我有一个包含该符号的Spring XML：

<property name="maxSize" value="${ws.client.pool.maxSize:5}"/>

启动原型时出现此错误：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-archetype-plugin:2.2:generate 
(default-cli) on project standalone-pom: 
org.apache.maven.archetype.exception.ArchetypeGenerationFailure: Error merging velocity templates: 
Encountered ":5}\"/>\n\t</bean>\n\t\n\t<bean id=\"fooServiceClient\" class=\"org.springframework.aop.framework.ProxyFactoryBean\">\n\t    <property name=\"targetSource\" ref=\"fooServiceClientPoolTargetSource\"/>\n\t</bean>\n\n</beans>\n" 
at line 15, column 69 of archetype-resources/src/main/resources/spring/library.ws-client.xml
[ERROR] Was expecting one of:
[ERROR] "}" ...
[ERROR] <DOT> ...
[ERROR] "(" ...
[ERROR] -> [Help 1]
[ERROR]

我尝试在原型的pom中配置转义字符：

    <pluginManagement>
        <plugins>
            <plugin>
                <artifactId>maven-archetype-plugin</artifactId>
                <version>2.0</version>
            </plugin>
            <!-- Resources configuration -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <version>2.5</version>
                <configuration>
                    <encoding>UTF-8</encoding>
                    <escapeString>\</escapeString>
                </configuration>
            </plugin>
        </plugins>
    </pluginManagement>

然而它仍然无法运作。在这种情况下：

<property name="maxSize" value="${ws.client.pool.maxSize\:5}"/>

错误如下：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-archetype-plugin:2.2:generate 
(default-cli) on project standalone-pom: org.apache.maven.archetype.exception.ArchetypeGenerationFailure: 
Error merging velocity templates: 
Encountered "\\" at line 15, column 69 of archetype-resources/src/main/resources/spring/library.ws-client.xml
[ERROR] Was expecting one of:
[ERROR] "}" ...
[ERROR] <DOT> ...
[ERROR] "(" ...
[ERROR] -> [Help 1]
[ERROR]

关于如何逃脱结肠的任何想法？

Answer 1

对于可选属性，使用以下Spring注入代码时出现相同的错误：

@Value("${hostname:}")
private String hostName;

解决方案：

#set( $dollar = '$' )
@Value("${dollar}{hostname:}")
private String hostName;

关键步骤是在{花括号}

中包含对$ constant的引用

Answer 2

我制定了一个基于Velocity变量（$ maxSize）的解决方案：

201
Example
{
    "self": "http://www.example.com/jira/rest/api/2/issue/10010/comment/10000",
    "id": "10000",
    "author": {
        "self": "http://www.example.com/jira/rest/api/2/user?username=fred",
        "name": "fred",
        "displayName": "Fred F. User",
        "active": false
    },
    "body": "Lorem ipsum dolor sit amet...",
    "updateAuthor": {
        "self": "http://www.example.com/jira/rest/api/2/user?username=fred",
        "name": "fred",
        "displayName": "Fred F. User",
        "active": false
    },
    "created": "2015-06-23T08:28:32.838+0000",
    "updated": "2015-06-23T08:28:32.838+0000",
    "visibility": {
        "type": "role",
        "value": "Administrators"
    }
}

Returned if add was successful
400
Returned if the input is invalid (e.g. missing required fields, invalid values, and so forth).

Answer 3

我在使用 Spring Boot 和 Java 时也遇到了问题。

@Value("${number:0}")
Long number;

Velocity 现在有一种方法可以关闭对带有 #[[ 和 ]]# 符号序列的一段代码的解析。它们之间的任何代码都不会被解析，但仍会包含在输出中。

/* 
#[[
*/
@Value("${number:0}")
Long number;
/*
]]#
*/

符号应从第一列开始。符号周围需要 Java 注释，以便 Java 代码仍然可以编译。

Maven原型 - 由于冒号而导致速度错误

3 个答案: