这篇文章主要介绍了如何基于java读取yml配置文件指定key内容,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下
先引入需要的依赖
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<!--读取yml文件-->
<dependency>
<groupid>org.yaml</groupid>
<artifactid>snakeyaml</artifactid>
<version>1.23</version>
</dependency>
读取yml文件工具类的代码
import org.apache.commons.lang3.stringutils;
import org.slf4j.logger;
import org.slf4j.loggerfactory;
import org.springframework.util.resourceutils;
import org.yaml.snakeyaml.yaml;
import java.io.*;
import java.util.hashmap;
import java.util.map;
import java.util.set;
/**
* @author hunmeng
* @create 2020-01-10 20:34
*/
public class ymlutils {
private static final logger logger = loggerfactory.getlogger(ymlutils.class);
private static string bootstrap_file = "classpath:application-test.yml";
private static map<string,string> result = new hashmap<>();
/**
* 根据文件名获取yml的文件内容
* @param filepath
* @param keys 第一个参数对应第一个key，第二个参数对应第二个key 比如spring.name下的所有 就是两个参数、
* getymlbyfilename(bootstrap_file,"spring", "name");
* @return
*/
public static map<string,string> getymlbyfilename(string filepath, string... keys) {
result = new hashmap<>();
if(filepath == null) filepath = bootstrap_file;
inputstream in = null;
try {
file file = resourceutils.getfile(filepath);
in = new bufferedinputstream(new fileinputstream(file));
yaml props = new yaml();
object obj = props.loadas(in,map.class);
map<string,object> param = (map<string, object>) obj;
for(map.entry<string,object> entry:param.entryset()){
string key = entry.getkey();
object val = entry.getvalue();
if (keys.length != 0 && !keys[0].equals(key)){
continue;
}
if(val instanceof map){
foreachyaml(key,(map<string, object>) val, 1, keys);
}else{
result.put(key, val.tostring());
}
}
return result;
} catch (filenotfoundexception e) {
logger.error(e.getmessage(),e);
}finally {
if (in != null){
try {
in.close();
} catch (ioexception e) {
logger.error(e.getmessage(),e);
}
}
}
return null;
}
/**
* 根据key获取值
* @param key
* @return
*/
public static string getvalue(string key) throws filenotfoundexception {
map<string,string> map = getymlbyfilename(null);
if(map==null)return null;
return map.get(key);
}
/**
* 遍历yml文件，获取map集合
* @param key_str
* @param obj
* @param i
* @param keys
* @return
*/
public static map<string,string> foreachyaml(string key_str,map<string, object> obj, int i, string... keys){
for(map.entry<string,object> entry:obj.entryset()){
string key = entry.getkey();
object val = entry.getvalue();
if (keys.length > i && !keys[i].equals(key)){
continue;
}
string str_new = "";
if(stringutils.isnotempty(key_str)){
str_new = key_str+ "."+key;
}else{
str_new = key;
}
if(val instanceof map){
foreachyaml(str_new,(map<string, object>) val, ++i, keys);
i--;
}else{
result.put(str_new,val.tostring());
}
}
return result;
}
/**
* 获取bootstrap.yml的name
* @return
*/
public static string getapplicationname() throws filenotfoundexception {
return getymlbyfilename(bootstrap_file).get("server.port");
}
/**
* 获取bootstrap.yml的name
* @return
*/
public static string getapplicationname1() throws filenotfoundexception {
string name = getymlbyfilename(bootstrap_file).get("spring.application.name");
return name + "center";
}
public static void main(string[] args) throws filenotfoundexception {
map<string, string> ymlbyfilename = getymlbyfilename(bootstrap_file,"spring");
set<map.entry<string, string>> entries = ymlbyfilename.entryset();
for (map.entry<string, string> entry : entries) {
system.out.println(entry.getkey()+"==="+entry.getvalue());
}
system.out.println(getapplicationname());
}
}
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