blocks|key|165073|text|<bean+id="contents"+class="org.apache.commons.io.IOUtils"+factory-method="toString">
++++<constructor-arg+value="classpath:path/to/resource.txt"+type="java.io.InputStream"+/>
</bean>|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|165074|此解决方案需要Apache+Commons+IO。|unstyled|165075|@Parvez建议的另一种不依赖Apache+Commons+IO的解决方案是|165076|<bean+id="contents"+class="java.lang.String">
++++<constructor-arg>
++++++++<bean+class="org.springframework.util.FileCopyUtils"+factory-method="copyToByteArray">
++++++++++++<constructor-arg+value="classpath:path/to/resource.txt"+type="java.io.InputStream"+/>
++++++++</bean>+++++
++++</constructor-arg>
</bean>|165077|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$B|C]]|$1|K|3|-4|5|F|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<pre><code>&lt;bean id="contents" class="org.apache.commons.io.IOUtils" factory-method="toString"&gt;
 &lt;constructor-arg value="classpath:path/to/resource.txt" type="java.io.InputStream" /&gt;
&lt;/bean&gt;
</code></pre>

This solution requires Apache Commons IO.

Another solution, suggested by @Parvez, without Apache Commons IO dependency is 

<pre><code>&lt;bean id="contents" class="java.lang.String"&gt;
 &lt;constructor-arg&gt;
 &lt;bean class="org.springframework.util.FileCopyUtils" factory-method="copyToByteArray"&gt;
 &lt;constructor-arg value="classpath:path/to/resource.txt" type="java.io.InputStream" /&gt;
 &lt;/bean&gt; 
 &lt;/constructor-arg&gt;
&lt;/bean&gt;
</code></pre>

blocks|key|4634258|text|这是一种不使用任何外部库的方法。默认由spring提供..environment.properties文件包含密钥值，每个值都带有${+pairs...reference+}|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4634259|在我的示例中，我保留了数据库属性|4634260|<bean+id="propertyConfigurer"
++++class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
++++<property+name="locations">
++++++++<list+value-type="org.springframework.core.io.Resource">
++++++++++++<value>classpath:environment.properties</value>

++++++++</list>
++++</property>
</bean>
<bean+id="mySQLdataSource"
++++class="org.springframework.jdbc.datasource.DriverManagerDataSource">
++++<property+name="driverClassName"+value="${JDBC.driver}"+/>
++++<property+name="url"+value="${JDBC.URL}"+/>
++++<property+name="username"+value="${JDBC.username}"+/>
++++<property+name="password"+value="${JDBC.password}"+/>
</bean>|code-block|syntax|javascript|4634261|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

This is one way of doing it without using any external library.. default provided by spring.. environment.properties file contains key value pairs...reference each value with ${key}

here in my example, I am keeping database props 

<pre><code>&lt;bean id="propertyConfigurer"
 class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"&gt;
 &lt;property name="locations"&gt;
 &lt;list value-type="org.springframework.core.io.Resource"&gt;
 &lt;value&gt;classpath:environment.properties&lt;/value&gt;

 &lt;/list&gt;
 &lt;/property&gt;
&lt;/bean&gt;
&lt;bean id="mySQLdataSource"
 class="org.springframework.jdbc.datasource.DriverManagerDataSource"&gt;
 &lt;property name="driverClassName" value="${JDBC.driver}" /&gt;
 &lt;property name="url" value="${JDBC.URL}" /&gt;
 &lt;property name="username" value="${JDBC.username}" /&gt;
 &lt;property name="password" value="${JDBC.password}" /&gt;
&lt;/bean&gt;
</code></pre>

blocks|key|165107|text|只需读一读：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|165108|++++try+{
++++++++Resource+resource+=+new+ClassPathResource(fileLocationInClasspath);
++++++++BufferedReader+br+=+new+BufferedReader(new+InputStreamReader(resource.getInputStream()),1024);
++++++++StringBuilder+stringBuilder+=+new+StringBuilder();
++++++++String+line;
++++++++while+((line+=+br.readLine())+!=+null)+{
++++++++++++stringBuilder.append(line).append('\n');
++++++++}
++++++++br.close();
++++++++return+stringBuilder.toString();
++++}+catch+(Exception+e)+{
++++++++LOGGER.error(e);
++++}|code-block|syntax|javascript|165109|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Just read it : 

<pre><code> try {
 Resource resource = new ClassPathResource(fileLocationInClasspath);
 BufferedReader br = new BufferedReader(new InputStreamReader(resource.getInputStream()),1024);
 StringBuilder stringBuilder = new StringBuilder();
 String line;
 while ((line = br.readLine()) != null) {
 stringBuilder.append(line).append('\n');
 }
 br.close();
 return stringBuilder.toString();
 } catch (Exception e) {
 LOGGER.error(e);
 }
</code></pre>

blocks|key|4634315|text|daoway的回答非常有用，在Adrian注释之后，我添加了一个类似于daoway的代码的配置片段|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4634316|<bean+id="contents"+class="org.springframework.core.io.ClassPathResource">
++++<constructor-arg+value="path/to/resource.txt"/>
</bean>|code-block|syntax|javascript|4634317|从您的组件|4634318|++++@Autowired
++++private+Resource+contents;

++++@PostConstruct
++++public+void+load(){
++++++++try+{
++++++++++++final+InputStream+inputStream+=+contents.getInputStream();
++++++++++++++++//use+the+stream+
++++++++++++BufferedReader+br+=+new+BufferedReader(new+InputStreamReader(inputStream+,1024);
++++++++++++StringBuilder+stringBuilder+=+new+StringBuilder();
++++++++++++String+line;
++++++++++++while+((line+=+br.readLine())+!=+null)+{
++++++++++++++++stringBuilder.append(line).append('\n');
++++++++++++}
++++++++++++br.close();
+++++}catch+(IOException+e)+{
++++++++++++LOGGER.error(message);
+++++}
++}|4634319|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/users/1127650/daoway|1|https://stackoverflow.com/users/1210071/adrian-ber^0|0|6|0|F|6|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]|$A|10|B|11|1|12]]|C|$]]|$1|D|3|E|5|F|7|13|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|14|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|15|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]]]

<a href="https://stackoverflow.com/users/1127650/daoway">daoway</a> answer was very helpful, and following <a href="https://stackoverflow.com/users/1210071/adrian-ber">Adrian</a> remark I am adding a configuration snippet similar to daoway's code

<pre><code>&lt;bean id="contents" class="org.springframework.core.io.ClassPathResource"&gt;
 &lt;constructor-arg value="path/to/resource.txt"/&gt;
&lt;/bean&gt;
</code></pre>

From your component

<pre><code> @Autowired
 private Resource contents;

 @PostConstruct
 public void load(){
 try {
 final InputStream inputStream = contents.getInputStream();
 //use the stream 
 BufferedReader br = new BufferedReader(new InputStreamReader(inputStream ,1024);
 StringBuilder stringBuilder = new StringBuilder();
 String line;
 while ((line = br.readLine()) != null) {
 stringBuilder.append(line).append('\n');
 }
 br.close();
 }catch (IOException e) {
 LOGGER.error(message);
 }
 }
</code></pre>

blocks|key|165951|text|在一行代码中，尝试读取test.xml：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|165952|String+msg+=+StreamUtils.copyToString(+new+ClassPathResource("test.xml").getInputStream(),+Charset.defaultCharset()++);|code-block|syntax|javascript|165953|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In one line try this to read test.xml:

<pre><code>String msg = StreamUtils.copyToString( new ClassPathResource("test.xml").getInputStream(), Charset.defaultCharset() );
</code></pre>

blocks|key|4634362|text|Spring|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|4634363|++++private+String+readResource(String+fileName){
++++ResourceLoader+resourceLoader+=+new+DefaultResourceLoader();
++++Resource+resource+=+resourceLoader.getResource("resourceSubfolder/"%2BfileName)
++++try{
+++++++++Reader+reader+=+new+InputStreamReader(resource.getInputStream());
+++++++++return+FileCopyUtils.copyToString(reader);
++++}+catch+(IOException+e){
+++++++++e.printStackTrace();
++++}
++++return+null;
++++}|code-block|syntax|javascript|4634364|entityMap^0|0|6|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Spring
<pre><code> private String readResource(String fileName){
 ResourceLoader resourceLoader = new DefaultResourceLoader();
 Resource resource = resourceLoader.getResource(&quot;resourceSubfolder/&quot;+fileName)
 try{
 Reader reader = new InputStreamReader(resource.getInputStream());
 return FileCopyUtils.copyToString(reader);
 } catch (IOException e){
 e.printStackTrace();
 }
 return null;
 }
</code></pre>

blocks|key|4151864|text|2021年更新。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4151865|您可以使用Spring的Resource接口获取文本文件的内容，然后使用StreamUtils.copyToString(resource.getInputStream(),+Charset.defaultCharset());获取文本。|offset|length|style|CODE|4151866|示例如下：|4151867|++++@Value("classpath:appVersionFilePath")
++++private+Resource+resource;

++++@GetMapping(value+=+"/hello")
++++public+HttpResult<String>+hello()+throws+IOException+{
++++++++String+appVersion+=+StreamUtils.copyToString(resource.getInputStream(),+Charset.defaultCharset());
++++++++//+...
++++}|code-block|syntax|javascript|4151868|entityMap^0|0|C|8|10|26|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@$D|S|E|T|F|G]|$D|U|E|V|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|W|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|X|8|@]|9|@]|A|$M|N]]|$1|O|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|P|$]]

Update in 2021.
You can use Spring's <code>Resource</code> Interface to get the content of text file, and then use <code>StreamUtils.copyToString(resource.getInputStream(), Charset.defaultCharset());</code> to get the text.
An example as follow:
<pre><code> @Value(&quot;classpath:appVersionFilePath&quot;)
 private Resource resource;

 @GetMapping(value = &quot;/hello&quot;)
 public HttpResult&lt;String&gt; hello() throws IOException {
 String appVersion = StreamUtils.copyToString(resource.getInputStream(), Charset.defaultCharset());
 // ...
 }
</code></pre>

How can I load a Spring resource contents and use it to set a bean property or pass it as an argument constructor?

The resource contains free text.

How do I load a resource and use its contents as a string in Spring

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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