SpringBoot--RestTemplate

小鱼儿 2022-05-22 03:56 270阅读 0赞

目录结构：

![70][]

pom.xml文件：

<?xml version="1.0" encoding="UTF-8"?>  
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">  
<modelVersion>4.0.0</modelVersion>  
  
  
<groupId>com.roncoo.education</groupId>  
<artifactId>spring-boot-demo-23-1</artifactId>  
<version>0.0.1-SNAPSHOT</version>  
<packaging>jar</packaging>  
  
  
<name>spring-boot-demo-23-1</name>  
<description>Demo project for Spring Boot</description>  
  
  
<parent>  
<groupId>org.springframework.boot</groupId>  
<artifactId>spring-boot-starter-parent</artifactId>  
<version>1.4.0.RELEASE</version>  
<relativePath />   
</parent>  
  
  
<properties>  
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>  
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>  
<java.version>1.8</java.version>  
</properties>  
  
  
<dependencies>  
<dependency>  
<groupId>org.springframework.boot</groupId>  
<artifactId>spring-boot-devtools</artifactId>  
</dependency>  
<dependency>  
<groupId>org.springframework.boot</groupId>  
<artifactId>spring-boot-starter-freemarker</artifactId>  
</dependency>  
  
<dependency>  
<groupId>org.springframework.boot</groupId>  
<artifactId>spring-boot-starter-data-jpa</artifactId>  
</dependency>  
<dependency>  
<groupId>mysql</groupId>  
<artifactId>mysql-connector-java</artifactId>  
<version>5.1.21</version>  
</dependency>  
  
  
<dependency>  
<groupId>org.apache.httpcomponents</groupId>  
<artifactId>httpclient</artifactId>  
</dependency>  
  
  
<dependency>  
<groupId>org.springframework.boot</groupId>  
<artifactId>spring-boot-starter-test</artifactId>  
<scope>test</scope>  
</dependency>  
</dependencies>  
  
  
<build>  
<plugins>  
<plugin>  
<groupId>org.springframework.boot</groupId>  
<artifactId>spring-boot-maven-plugin</artifactId>  
</plugin>  
</plugins>  
</build>

</project>

application.properties文件：

spring.datasource.url=jdbc:mysql://localhost:3306/test  
spring.datasource.username=root  
spring.datasource.password=123456

spring.datasource.driver-class-name=com.mysql.jdbc.Driver

package com.roncoo.example;  
  
  
public class PicInfo \{  
private int id;  
private String name;  
private String url;  
public int getId() \{  
return id;  
\}  
public void setId(int id) \{  
this.id = id;  
\}  
public String getName() \{  
return name;  
\}  
public void setName(String name) \{  
this.name = name;  
\}  
public String getUrl() \{  
return url;  
\}  
public void setUrl(String url) \{  
this.url = url;  
\}  
@Override  
public String toString() \{  
return "PicInfo \[id=" + id + ", name=" + name + ", url=" + url + "\]";  
\}

package com.roncoo.example;  
  
  
import org.springframework.beans.factory.annotation.Autowired;  
import org.springframework.stereotype.Controller;  
import org.springframework.web.bind.annotation.RequestMapping;  
import org.springframework.web.bind.annotation.ResponseBody;  
import org.springframework.web.client.RestTemplate;  
  
  
@Controller  
@RequestMapping("web")  
public class WebController \{  
  
@Autowired  
 private RestTemplate restTemplate;    
  
@RequestMapping("getUser")  
@ResponseBody

public PicInfo getUser() \{

//这里的链接就是提供数据的接口，这里可以将url写在配置文件里面，便于维护

PicInfo bean = restTemplate.getForObject("http://192.168.0.3:9999/picInfo/getById",  
PicInfo.class);  
return bean;  
\}

package com.roncoo.example;  
  
  
import org.springframework.beans.factory.annotation.Autowired;  
import org.springframework.boot.SpringApplication;  
import org.springframework.boot.autoconfigure.SpringBootApplication;  
import org.springframework.boot.web.client.RestTemplateBuilder;  
import org.springframework.context.annotation.Bean;  
import org.springframework.web.client.RestTemplate;  
  
  
@SpringBootApplication  
public class SpringBootDemo231Application \{  
  
  
 @Autowired    
 private RestTemplateBuilder builder;    
    
 // 使用RestTemplateBuilder来实例化RestTemplate对象，spring默认已经注入了RestTemplateBuilder实例    
 @Bean    
 public RestTemplate restTemplate() \{    
    return builder.build();    
 \}    
  
public static void main(String\[\] args) \{  
SpringApplication.run(SpringBootDemo231Application.class, args);  
\}

![70 1][]

链接：

http://localhost:8080/web/getUser

![70 2][]

[70]: /images/20220522/261cc64c74c5443bbce538180e5b606d.png
[70 1]: /images/20220522/a3237585acd9494884e348805cb5631d.png
[70 2]: /images/20220522/c85204d693df4ae8bebb4eb3b8079009.png

SpringBoot--RestTemplate

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