jar包依赖整理(一)

参考 ： https://mvnrepository.com/

整理一些小工具 の 依赖方便用的时候好找一些

jackson：

主要用于json 处理：Java对象与Json 互相转换

<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.10.3</version>
        </dependency>
                
        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.10.3</version>
        </dependency>

　　　

简单例子

data = mapper.readValue(jsonData, 希望转的类型比如 User.class); // jsonData 为json字符串String类型就行， javaType java对象

转换成List <Map 

　ObjectMapper mapper = new ObjectMapper();
  CollectionType listType = mapper.getTypeFactory().constructCollectionType(ArrayList.class, HashMap.class);
  data = mapper.readValue(jsonData, listType);

 common-lang3 ：工具包

<dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>

比如有：字符串处理 StringUtils.xxx() 数组处理ArrayUtils.xxx() 等等等等 

比如可以判断两个数组相同 用这个就方便了不少、还有int数组变字符串数组等等 这里就不多写了 

Objects.deepEquals(new int[] {1,2,3},new int[] {1,2,4});

poi 就不多说了 

<!-- https://mvnrepository.com/artifact/org.apache.poi/poi -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.15</version>
        </dependency>
        <!-- poi office 2007需要的jar包 -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.15</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml-schemas</artifactId>
            <version>3.15</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>ooxml-schemas</artifactId>
            <version>1.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-scratchpad</artifactId>
            <version>3.15</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-excelant</artifactId>
            <version>3.15</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-examples</artifactId>
            <version>3.15</version>
        </dependency>

EasyPoi 

<!--excel导入导出-->
            <dependency>
                <groupId>cn.afterturn</groupId>
                <artifactId>easypoi-web</artifactId>
                <version>4.0.0</version>
            </dependency>

教程：http://easypoi.mydoc.io/#text_202982

类似的还有：easyExcel

<dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>easyexcel</artifactId>
      <version>1.1.2-beat5</version>
 </dependency>

参考代码：https://github.com/alibaba/easyexcel

fastjson ：

json对象与JavaBean对象的转换

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.47</version>
        </dependency>    

 举个例子：

JSONObject json=JSONObject.parseObject(jsonStr); //jsonStr 为字符串 转换为json 对象 ；然后就可以从对象里取东西啦 json.get("xxx") 这个可以跟jackson 做个比较~！

String jsonString = json.toJSONString(对象); //反过来 

 pinyin4j ：

中文字符与拼音之间的转换

<dependency>
            <groupId>com.belerweb</groupId>
            <artifactId>pinyin4j</artifactId>
            <version>2.5.0</version>
        </dependency>

 比如

public static String getPinyin(String str) {
        char[] charArr = str.toCharArray();
        String[] newStr = new String[charArr.length];
        String re = "";
        HanyuPinyinOutputFormat fmt = new HanyuPinyinOutputFormat();
        fmt.setCaseType(HanyuPinyinCaseType.LOWERCASE);
        fmt.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
        fmt.setVCharType(HanyuPinyinVCharType.WITH_V);
        for (int i = 0; i < charArr.length; i++) {
            // 判断是否为汉字字符
            if (java.lang.Character.toString(charArr[i]).matches("[\u4E00-\u9FA5]+")) {
                try {
                    newStr = PinyinHelper.toHanyuPinyinStringArray(charArr[i], fmt);
                } catch (BadHanyuPinyinOutputFormatCombination e) {
                    e.printStackTrace();
                }
                re += newStr[0];
            } else {
                re += java.lang.Character.toString(charArr[i]);
            }
        }
        return re;
    }

 barcode4j 

生成条形码

            <dependency>
            <groupId>net.sf.barcode4j</groupId>
            <artifactId>barcode4j</artifactId>
            <version>2.1</version>
        </dependency>       

 jstl : 

<dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jstl</artifactId>
                <version>1.2</version>
            </dependency>

 

commons-codec：BASE64处理

<!-- BASE64处理 -->
            <dependency>
                <groupId>commons-codec</groupId>
                <artifactId>commons-codec</artifactId>
                <version>1.11</version>
            </dependency>

commons-fileupload: 上传文件

<!-- 上传文件依赖 -->
            <dependency>
                <groupId>commons-fileupload</groupId>
                <artifactId>commons-fileupload</artifactId>
                <version>1.3.3</version>
            </dependency>

swagger

        <!--swagger-->
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger2</artifactId>
                <version>2.9.2</version>
            </dependency>
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger-ui</artifactId>
                <version>2.9.2</version>
            </dependency>    

oshi-core： 获取硬件系统信息 比如cpu 操作系统什么的。

<dependency>
                <groupId>com.github.oshi</groupId>
                <artifactId>oshi-core</artifactId>
                <version>3.9.1</version>
            </dependency>

jwt: jsonwebtoken

参考： https://github.com/jwtk/jjwt

 0.11.1

    <properties>
        <jjwt.version>0.11.1</jjwt.version>
    </properties>    
    <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt-api</artifactId>
            <version>${jjwt.version}</version>
        </dependency>
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt-impl</artifactId>
            <version>${jjwt.version}</version>
        </dependency>
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt-jackson</artifactId>
            <version>${jjwt.version}</version>
        </dependency>

 看看说明：

https://github.com/jwtk/jjwt#Installation

lombok

    <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <scope>provided</scope>
        </dependency>

 很多地方用到比如： @Slf4j  @Data  @AllArgsConstructor 等等注解 都需要这个插件。这里当：已经在idea 中安装好了 lombok 插件来说。

 举例：@Slf4j  注解就可以 省略 private  final Logger log = LoggerFactory.getLogger(当前类名.class); 直接用log.info 。( 已经安装好插件 并引了依赖)

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