Update README.md

Author: binarywang

README.md

@@ -1,7 +1,7 @@
 [![码云Gitee](https://gitee.com/binary/java-generator/badge/star.svg?theme=blue)](https://gitee.com/binary/java-generator)
 [![Github](http://github-svg-buttons.herokuapp.com/star.svg?user=binarywang&repo=java-testdata-generator&style=flat&background=1081C1)](https://github.com/binarywang/java-testdata-generator)
 [![Build Status](https://travis-ci.org/binarywang/java-testdata-generator.svg?branch=master)](https://travis-ci.org/binarywang/java-testdata-generator)
-![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.github.binarywang/java-testdata-generator/badge.svg)
+[![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.github.binarywang/java-testdata-generator/badge.svg)](https://mvnrepository.com/artifact/com.github.binarywang/java-testdata-generator)
 
 
 Java实现的各种随机测试数据生成器，包括身份证号码，银行卡号，姓名，手机号，电子邮箱地址和生成insert sql参数列表字符串等。