我写的课上有问题。该类的目的是为applicationResource.properties文件添加/删除/更新,<spring:message code="key" />
使用该文件为网站提供双语支持。手动与属性文件交互工作正常,但我有更大的需求,所以我构建了一种允许从数据库进行更改的方法。这给了我一个非常动态和灵活的系统,我可以从中工作。
但是,有一个问题。在使用此单一更改后的某个时刻,法语字符最终会发生变化。如Déconnexion
成为Déconnexion
。当在notepad ++中查看它的第一个Déconnexion
然后腐败到D\u00C3\u00A9connexion
。此示例是原始属性文件的一部分。
原始(非临时)属性文件将text file encoding
设置为other: UTF-8
。项目属性text file encoding
设置为inherited from container (Cp1252)
。我试着改变到Other: UTF-8
没有变化。
所以我的问题是,是什么导致我的法语角色腐败,我该如何解决?我在下面提供了完整的课程。
更新:在StephaneM的帮助下,在她的回答中,我能够确切地追踪导致腐败的原因,但还没有解决。 AR类中的loadProperties()函数。加载临时AP文件后,法语字符就会损坏。这让我怀疑创建临时AP文件的原始进程使用的是不同的编码。所以我将不得不追踪它。
package pojo;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Objects;
import java.util.Properties;
import java.util.Set;
import org.springframework.beans.factory.annotation.Autowired;
/*
* Purpose of this class is to handle all the ApplicationResource(_fr).properties interactions
* so that there is one unified location handling this, instead of code duplication.
*/
public class AR{
public final String en_path = "/ApplicationResources.properties";
public final String fr_path = "/ApplicationResources_fr.properties";
private Properties en_prop = null;
private Properties fr_prop = null;
public AR()
{
loadProperties();
}
private void loadProperties()
{
InputStream en_is = null;
InputStream fr_is = null;
try {
this.en_prop = new Properties();
this.fr_prop = new Properties();
en_is = this.getClass().getResourceAsStream(en_path);
fr_is = this.getClass().getResourceAsStream(fr_path);
en_prop.load(en_is);
fr_prop.load(fr_is);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private boolean keyExist(String mykey, String mypath) //deprecated due to better code/method
{
Properties test_prop = null;
InputStream is = null;
try {
test_prop = new Properties();
is = this.getClass().getResourceAsStream(mypath);
test_prop.load(is);
Set<Object> keys = test_prop.keySet();
for(Object k:keys) {
String key = (String)k;
//System.out.print(key + " ");
if(key.equals(mykey))
{
return true;
}
}
//System.out.println(" ");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (NullPointerException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return false;
}
public boolean en_keyExist(String mykey)
{
//searches english file
loadProperties();
return en_prop.containsKey(mykey);
//return keyExist(mykey, en_path); //original method
}
public boolean fr_keyExist(String mykey)
{
//searches french file
loadProperties();
return fr_prop.containsKey(mykey);
//return keyExist(mykey, fr_path); //original method
}
public boolean en_fr_keyExist(String mykey)
{
//searches both english and french files
loadProperties();
return (en_prop.containsKey(mykey) && fr_prop.containsKey(mykey));
//return (keyExist(mykey, en_path) && keyExist(mykey, fr_path)); //original method
}
public String en_returnProperty(String mykey)
{
//returns null if key does not exist
loadProperties();
return this.en_prop.getProperty(mykey);
}
public String fr_returnProperty(String mykey)
{
//returns null if key does not exist
loadProperties();
return this.fr_prop.getProperty(mykey);
}
public void appendProperty(Properties new_en_prop,Properties new_fr_prop)
{
//note: during a test, setProperty (used in populating the properties) does not allow duplicates, it overwrites.
//So, load the existing properties, and for each new property add it
loadProperties();
for(Object key : new_en_prop.keySet())
{
en_prop.setProperty((String)key, new_en_prop.getProperty((String)key));
}
try (OutputStream en_os = new FileOutputStream(getClass().getResource(en_path).getFile(),false);)
{
en_prop.store(en_os, null);
} catch (IOException e) {
e.printStackTrace();
}
for(Object key : new_fr_prop.keySet())
{
fr_prop.setProperty((String)key, new_fr_prop.getProperty((String)key));
}
try (OutputStream fr_os = new FileOutputStream(getClass().getResource(fr_path).getFile(),false);)
{
fr_prop.store(fr_os, null);
} catch (IOException e) {
e.printStackTrace();
}
}
public boolean appendProperty(String mykey, String en_val, String fr_val) //appears to have timing error due to only saving last value
//due to timing error this function is only suitable for single additions
//due to the timing error, tried returning boolean to have it finished but was not successful
//setting the class variables to static did not solve the timing issue
{
loadProperties();
en_prop.setProperty(mykey, en_val);
try (OutputStream en_os = new FileOutputStream(getClass().getResource(en_path).getFile(),false);)
{
en_prop.store(en_os, null);
} catch (IOException e) {
e.printStackTrace();
}
fr_prop.setProperty(mykey, fr_val);
try (OutputStream fr_os = new FileOutputStream(getClass().getResource(fr_path).getFile(),false);)
{
fr_prop.store(fr_os, null);
} catch (IOException e) {
e.printStackTrace();
}
return true;
}
public void en_setProperty(String mykey, String en_val)
//suspected timing issue, use only for singular changes
{
loadProperties();
en_prop.setProperty(mykey, en_val);
try (OutputStream en_os = new FileOutputStream(getClass().getResource(en_path).getFile(),false);)
{
en_prop.store(en_os, null);
} catch (IOException e) {
e.printStackTrace();
}
}
public void fr_setProperty(String mykey, String fr_val)
//suspected timing issue, use only for singular changes
{
loadProperties();
fr_prop.setProperty(mykey, fr_val);
try (OutputStream fr_os = new FileOutputStream(getClass().getResource(fr_path).getFile(),false);)
{
fr_prop.store(fr_os, null);
} catch (IOException e) {
e.printStackTrace();
}
}
public void compareResources()
{
Properties new_en = new Properties();
Properties new_fr = new Properties();
for(Object key : en_prop.keySet())
{
new_en.setProperty((String)key, en_prop.getProperty((String)key));
}
for(Object key : fr_prop.keySet())
{
new_fr.setProperty((String)key, fr_prop.getProperty((String)key));
}
Properties temp = (Properties) new_en.clone();
for(Object key : temp.keySet())
{
if(new_fr.containsKey((String) key))
{
new_fr.remove(key);
new_en.remove(key);
}
}
for(Object key : new_en.keySet())
{
System.out.println("English only key: " + ((String)key));
}
for(Object key : new_fr.keySet())
{
System.out.println("French only key: " + ((String)key));
}
}
}
该类的示例用例,直接取自应用程序,但经过一些编辑,因此只有相关部分在这里
AR testing = new AR();
Properties en_prop = new Properties();
Properties fr_prop = new Properties();
final String test_prod_cur = "{call BILINGUAL_VALUES(?)}";
ResultSet rs = null;
try (
Connection connection = jdbcTemplate.getDataSource().getConnection();
CallableStatement callableStatement = connection.prepareCall(test_prod_cur);
)
{
callableStatement.registerOutParameter(1, OracleTypes.CURSOR);
callableStatement.executeUpdate();
rs = (ResultSet) callableStatement.getObject(1);
while (rs.next())
{
String thead = rs.getString(1);
en_prop.setProperty(keyheader+thead, rs.getString(2));
fr_prop.setProperty(keyheader+thead, rs.getString(3));
//testing.appendProperty(keyheader+thead, rs.getString(2), rs.getString(3)); //has a timing issue, ends up only appending final value
}
}
catch (SQLException e)
{
System.out.println("SQLException - bilingual values");
System.out.println(e.getMessage());
}
testing.appendProperty(en_prop, fr_prop);
关于这个问题:“是什么导致我的法语字符腐败,我该如何解决?”,答案在文档中(Properties.store()):
public void store(OutputStream out,String comments)抛出IOException
将此Properties表中的此属性列表(键和元素对)以适合使用load(InputStream)方法加载到Properties表的格式写入输出流。
此Properties方法不会写出此Properties表的默认表中的属性(如果有)。
此方法以与store(Writer)中指定的格式相同的格式输出注释,属性键和值,但有以下区别:
- 使用ISO 8859-1字符编码写入流。
- 注释中不在Latin-1中的字符将写为\ uxxxx,表示其适当的unicode十六进制值xxxx。
- 小于\ u0020的字符和属性键或值中大于\ u007E的字符将写为适当的十六进制值xxxx的\ uxxxx。
我不是唯一一个面对这个问题的人,我设法找到了另一个问题,这是引导我解决问题的answers之一。我要感谢另一个site让我知道要包括什么。
只有四个添加或更改的行,我将列出它们,然后给出一个完整的功能。
import java.io.Reader;
Reader reader = new InputStreamReader(fr_is, "UTF-8");
fr_prop.load(reader); //instead of fr_prop.load(fr_is);
reader.close();
完整的功能
import java.io.Reader;
private void loadProperties()
{
InputStream en_is = null;
InputStream fr_is = null;
try {
this.en_prop = new Properties();
this.fr_prop = new Properties();
en_is = this.getClass().getResourceAsStream(en_path);
fr_is = this.getClass().getResourceAsStream(fr_path);
Reader reader = new InputStreamReader(fr_is, "UTF-8");
en_prop.load(en_is);
fr_prop.load(reader);
reader.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
通过介绍读者并使用它,它已经清除了法语字符腐败。
我应该提一下,在我做了上述更改并使其正常工作之前,我将所有可以找到的文件属性更改为UTF-8。这个site为您提供了我所做的更改。这是一个很好的page,帮助我确认编码。