在我修改了Consuming a RESTful Web Service示例以从api.stackexchange.com调用根据ID获取用户后，我遇到了JsonParseException：
com.fasterxml.jackson.core.JsonParseException：非法字符（（CTRL-CHAR，代码31））：仅允许在记号之间使用常规空格（\r，\n，\t）
api.stackexchange.com的响应是gzip压缩的。
如何将Spring-Web RestTemplate添加对gzip压缩的支持？
我正在使用Spring boot parent ver。1.3.1.RELEASE因此Spring-Web 4.2.4-RELEASE
这是我调整后的示例：
User.java
package stackexchange.dto;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.databind.PropertyNamingStrategy.LowerCaseWithUnderscoresStrategy;
import com.fasterxml.jackson.databind.annotation.JsonNaming;
@JsonIgnoreProperties(ignoreUnknown = true)
@JsonNaming(LowerCaseWithUnderscoresStrategy.class)
public class User {
// Properties made public in order to shorten the example
public int userId;
public String displayName;
public int reputation;
@Override
public String toString() {
return "user{"
+ "display_name='" + displayName + '\''
+ "reputation='" + reputation + '\''
+ "user_id='" + userId + '\''
+ '}';
}
}
CommonWrapper.java
package stackexchange.dto;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.databind.PropertyNamingStrategy.LowerCaseWithUnderscoresStrategy;
import com.fasterxml.jackson.databind.annotation.JsonNaming;
@JsonIgnoreProperties(ignoreUnknown = true)
@JsonNaming(LowerCaseWithUnderscoresStrategy.class)
public class CommonWrapper {
// Properties made public in order to shorten the example
public boolean hasMore;
// an array of the type found in type
public User[] items;
public int page;
public int pageSize;
public int quotaMax;
public int quotaRemaining;
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
for (User user : items) {
sb.append("{" + user.toString() + "}\n");
}
return "common_wrapper{"
+ "\"items\"=[\n"
+ sb
+ "]"
+ "has_more='" + hasMore + '\''
+ "page='" + page + '\''
+ "page_size='" + pageSize + '\''
+ "quota_max='" + quotaMax + '\''
+ "quota_remaining='" + quotaRemaining + '\''
+ '}';
}
}
StackExchange.java
package stackexchange;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.web.client.RestTemplate;
import stackexchange.dto.CommonWrapper;
import com.fasterxml.jackson.databind.PropertyNamingStrategy.LowerCaseWithUnderscoresStrategy;
import com.fasterxml.jackson.databind.annotation.JsonNaming;
@JsonNaming(LowerCaseWithUnderscoresStrategy.class)
public class StackExchange implements CommandLineRunner{
private static final Logger log = LoggerFactory.getLogger(StackExchange.class);
public static void main(String args[]) {
SpringApplication.run(StackExchange.class);
}
@Override
public void run(String... strings) throws Exception {
RestTemplate restTemplate = new RestTemplate();
CommonWrapper response = restTemplate
.getForObject(
"https://api.stackexchange.com/2.2/users/4607349?site=stackoverflow",
CommonWrapper.class);
log.info(response.toString());
}
}
pom.xml - 与示例中相同
<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>stackexchangetest</groupId>
<artifactId>stackexchangetest</artifactId>
<version>0.0.1</version>
<name>stackexchangetest</name>
<description>api.stackexchange.com Test</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.1.RELEASE</version>
</parent>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>