1、修改端口号主要是通过配置文件修改。如图：
完整版配置
1 ######################################################## 2 ###server 配置信息 3 ######################################################## 4 #spring boot 端口号配置 5 server.port = 8081 6 #spring boot 默认访问路径是/ 7 server.context-path = /springboot 8 server.tomcat.uri-encoding = UTF-8 9 10 11 ####################################################### 12 ##datasource -- 指定mysql数据库连接信息. 13 ####################################################### 14 spring.datasource.url = jdbc:mysql://localhost:3306/test 15 spring.datasource.username = root 16 spring.datasource.password = 123456 17 spring.datasource.driverClassName = com.mysql.jdbc.Driver 18 spring.datasource.max-active=20 19 spring.datasource.max-idle=8 20 spring.datasource.min-idle=8 21 spring.datasource.initial-size=10 22 23 24 ######################################################## 25 ### Java Persistence Api -- Spring jpa的配置信息. 26 ######################################################## 27 # Specify the DBMS 28 spring.jpa.database = MYSQL 29 # Show or not log for each sql query 30 spring.jpa.show-sql = true 31 # Hibernate ddl auto (create, create-drop, update) 32 spring.jpa.hibernate.ddl-auto = update 33 # Naming strategy 34 #[org.hibernate.cfg.ImprovedNamingStrategy #org.hibernate.cfg.DefaultNamingStrategy] 35 spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy 36 # stripped before adding them to the entity manager) 37 spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
此时的访问路径就会改为
http://127.0.0.1:8080/springboot/cat/selectByCatName?catName=catName(使用的名字必须是唯一的)
项目完整搭建
1、pom.xml搭建
1 <?xml version="1.0" encoding="UTF-8"?> 2 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 3 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 4 <modelVersion>4.0.0</modelVersion> 5 6 <groupId>com.spring</groupId> 7 <artifactId>boot_jpa</artifactId> 8 <version>0.0.1-SNAPSHOT</version> 9 <packaging>jar</packaging> 10 11 <name>boot_jpa</name> 12 <url>http://maven.apache.org</url> 13 <description>Demo project for Spring Boot</description> 14 15 <parent> 16 <groupId>org.springframework.boot</groupId> 17 <artifactId>spring-boot-starter-parent</artifactId> 18 <version>1.5.9.RELEASE</version> 19 <relativePath/> <!-- lookup parent from repository --> 20 </parent> 21 22 <properties> 23 <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 24 <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> 25 <java.version>1.8</java.version> 26 </properties> 27 28 <dependencies> 29 <dependency> 30 <groupId>org.springframework.boot</groupId> 31 <artifactId>spring-boot-starter-web</artifactId> 32 </dependency> 33 34 <dependency> 35 <groupId>org.springframework.boot</groupId> 36 <artifactId>spring-boot-starter-test</artifactId> 37 <scope>test</scope> 38 </dependency> 39 40 <!--自定义配置文件--> 41 <dependency> 42 <groupId>com.alibaba</groupId> 43 <artifactId>fastjson</artifactId> 44 <version>1.2.15</version> 45 </dependency> 46 47 48 <!-- 添加fastjson 依赖包. --> 49 <dependency> 50 <groupId>com.alibaba</groupId> 51 <artifactId>fastjson</artifactId> 52 <version>1.2.15</version> 53 </dependency> 54 55 <!-- spring boot devtools 依赖包. --> 56 <dependency> 57 <groupId>org.springframework.boot</groupId> 58 <artifactId>spring-boot-devtools</artifactId> 59 <optional>true</optional> 60 <scope>true</scope> 61 </dependency> 62 63 <!-- 添加MySQL数据库驱动依赖包. --> 64 <dependency> 65 <groupId>mysql</groupId> 66 <artifactId>mysql-connector-java</artifactId> 67 </dependency> 68 69 <!-- 添加Spring-data-jpa依赖. --> 70 <dependency> 71 <groupId>org.springframework.boot</groupId> 72 <artifactId>spring-boot-starter-data-jpa</artifactId> 73 </dependency> 74 75 76 </dependencies> 77 78 <build> 79 <plugins> 80 <plugin> 81 <groupId>org.springframework.boot</groupId> 82 <artifactId>spring-boot-maven-plugin</artifactId> 83 <configuration> 84 <!--fork : 如果没有该项配置，肯呢个devtools不会起作用，即应用不会restart --> 85 <fork>true</fork> 86 </configuration> 87 </plugin> 88 </plugins> 89 </build> 90 91 92 </project>
2、实体类搭建
1 package com.spring.boot.jap.perform.pojo; 2 3 import javax.persistence.Entity; 4 import javax.persistence.GeneratedValue; 5 import javax.persistence.GenerationType; 6 import javax.persistence.Id; 7 8 /** 9 * Created by liuya on 2018-01-26. 10 */ 11 @Entity 12 public class Cat { 13 14 /** 15 * 使用@Id指定主键. 16 * <p> 17 * 使用代码@GeneratedValue(strategy=GenerationType.AUTO) 18 * 指定主键的生成策略，mysql默认的是自增长。 19 */ 20 @Id 21 @GeneratedValue(strategy = GenerationType.AUTO) 22 private int id;//主键. 23 24 private String catName;//姓名. cat_name 25 26 private int catAge;//年龄. cat_age; 27 28 public int getId() { 29 return id; 30 } 31 32 public void setId(int id) { 33 this.id = id; 34 } 35 36 public String getCatName() { 37 return catName; 38 } 39 40 public void setCatName(String catName) { 41 this.catName = catName; 42 } 43 44 public int getCatAge() { 45 return catAge; 46 } 47 48 public void setCatAge(int catAge) { 49 this.catAge = catAge; 50 } 51 52 }
3、dao搭建
1 package com.spring.boot.jap.perform.dao; 2 3 import com.spring.boot.jap.perform.pojo.Cat; 4 import org.springframework.jdbc.core.BeanPropertyRowMapper; 5 import org.springframework.jdbc.core.JdbcTemplate; 6 import org.springframework.jdbc.core.RowMapper; 7 import org.springframework.stereotype.Repository; 8 9 import javax.annotation.Resource; 10 11 /** 12 * Created by liuya on 2018-01-27. 13 * <p> 14 * 使用@Repository注解，标注这是一个持久化操作对象. 15 */ 16 17 18 @Repository 19 public class CatDao { 20 21 @Resource 22 private JdbcTemplate jdbcTemplate; 23 24 /** 25 * 1、定义一个Sql语句； 26 * 2、定义一个RowMapper. 27 * 3、执行查询方法. 28 */ 29 public Cat selectByCatName(String catName) { 30 31 //查询的sql语句 32 String sql = "select * from cat where cat_name=?"; 33 //封装数据的mapper 34 RowMapper<Cat> rowMapper = new BeanPropertyRowMapper<>(Cat.class); 35 //执行语句的位置 36 Cat cat = jdbcTemplate.queryForObject(sql,new Object[]{catName},rowMapper); 37 38 //返回封装类 39 return cat; 40 } 41 42 }
4、service搭建
1 package com.spring.boot.jap.perform.service; 2 3 import com.spring.boot.jap.perform.dao.CatDao; 4 import com.spring.boot.jap.perform.pojo.Cat; 5 import org.springframework.stereotype.Service; 6 7 import javax.annotation.Resource; 8 import javax.transaction.Transactional; 9 10 /** 11 * Created by liuya on 2018-01-27. 12 */ 13 14 15 @Service 16 public class CatService { 17 18 @Resource 19 private CatDao catDao; 20 21 /** 22 * 通过名称查询用户的信息 23 * 24 * @param catName 25 * @return 26 */ 27 public Cat selectByCatName(String catName) { 28 return catDao.selectByCatName(catName); 29 } 30 31 32 }
5、controller搭建
1 package com.spring.boot.jap.perform.controller; 2 3 import com.spring.boot.jap.perform.pojo.Cat; 4 import com.spring.boot.jap.perform.service.CatService; 5 import org.springframework.web.bind.annotation.RequestMapping; 6 import org.springframework.web.bind.annotation.RestController; 7 8 import javax.annotation.Resource; 9 10 /** 11 * Created by liuya on 2018-01-27. 12 */ 13 14 15 @RestController 16 @RequestMapping("/cat") 17 public class CatController { 18 19 @Resource 20 private CatService catService; 21 22 //新建用户信息(修改了application.properties后需要下边方式访问) 23 //访问连接:http://127.0.0.1:8080/springboot/cat/selectByCatName?catName=catName(使用的名字必须是唯一的) 24 @RequestMapping("/selectByCatName") 25 public Cat selectByCatName(String catName) { 26 return catService.selectByCatName(catName); 27 } 28 29 30 }
6、application配置在上边