Java读取Properties文件的六种方法
public void list() {
p.list(System.out);
}
public String getValue(String itemName) {
return p.getProperty(itemName);
}
public String getValue(String itemName, String defaultValue) {
return p.getProperty(itemName, defaultValue);
}
public void setValue(String itemName, String value) {
p.setProperty(itemName, value);
}
public void saveFile(String filename, String description) throws Exception {
try {
File f = new File(filename);
out = new FileOutputStream(f);
p.store(out, description);
out.close();
} catch (IOException ex) {
throw new Exception("无法保存指定的配置文件:" + filename);
}
}
public void saveFile(String filename) throws Exception{
saveFile(filename,"");
}
public void saveFile() throws Exception{
if(filename.length()==0)
throw new Exception("需指定保存的配置文件名");
saveFile(filename);
}
public void deleteValue(String value){
p.remove(value);
}
public static void main(String args[]){
String file="/eclipse/workspace/NewsTest/WEB-INF/config.properties";
// String file="D:\\eclipse\\workspace\\NewsTest\\WEB-INF\\config.properties";
PropertiesUnit pu=new PropertiesUnit(file);
pu.list();
}
}
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package com.test.TestClass;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
public class ReadPropertiesFile ...{
public void readPropertiesFile(String fileName) throws FileNotFoundException ...{
String str = "";
Properties prop = new Properties();
InputStream stream = null;
//读取这个类在同一包中的properties文件
//stream = getClass().getClassLoader().getResourceAsStream(fileName);
System.out.println("path:" + getClass().getResource(fileName));
//读取SRC下的的properties文件
String path = getClass().getResource("/").getPath();
stream = new BufferedInputStream(new FileInputStream(new File(path+fileName)));
try ...{
prop.load(stream);
str = prop.getProperty("localname");
System.out.println("localname:" + str);
System.out.println("properties:" + prop);
stream.close();
} catch (IOException e) ...{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void main(String[] args) throws FileNotFoundException ...{
// TODO Auto-generated method stub
new ReadPropertiesFile().readPropertiesFile("config.properties");
}
}
--------------------------------------------------------------
//=================sprin配置文件================================
<bean
id="userService"
/>
</bean>
//=================java文件================================
package com.thtf.ezone.ezesb.jmx.admin.service.impl;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;
public class UserServiceImpl implements UserService {
String filePath = null;
public void setFilePath(String filePath) {
this.filePath = filePath;
}
public static void main(String dd[])throws Exception{
Properties p = new Properties();
FileInputStream ferr=new FileInputStream((getClass().getClassLoader()
.getResource("") + filePath).toString().substring(6));// 用subString(6)去掉：file:/try{
p.load(ferr);
ferr.close();
Set s = p.keySet();
Iterator it = s.iterator();
while(it.hasNext()){
String id = (String)it.next();
String value = p.getProperty(id);
System.out.println(id+":="+value);
}
}catch(Exception e){
e.printStackTrace();
}
}
}
//==============databaseconfing.properties 文件=====================
#----------------------------------
# sql server 2000数据厍连接信息
#----------------------------------
dp.sd.DataBaseTyp=mssql
DataBaseHost=127.0.0.1:1433
DataBase=formpro
UserName=sa
PassWord=01
#----------------------------------
# mysql 数据厍连接信息
#----------------------------------
#DataBaseHost=127.0.0.1:3306
#DataBaseTyp=mysql
#DataBase=snow
#UserName=root
#PassWord=01
//==========================运行结果=======================
PassWord:=01
DataBaseHost:=127.0.0.1:1433
DataBase:=formpro
dp.sd.DataBaseTyp:=mssql
UserName:=sa
