如何使Spring MVC返回CSV与返回JSON一样方便

Question

我知道Spring MVC可以轻松返回Json格式的模型; 但是,我尝试了很多不同的方法来返回CSV格式的模型(通过杰克逊),但无法成功.

我该怎么办？

我附上我的模型代码,控制器代码和gradle.build,如下所示:

非常感谢!

模型:

@JsonPropertyOrder({ "staffName", "name" })
public class Greeter
{
    String name;
    String staffName[];

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }

    public String[] getStaffName()
    {
        return staffName;
    }

    public void setStaffName(String[] staffName)
    {
        this.staffName = staffName;
    }
}

控制器:

@Controller
public class GreetingController {

    @RequestMapping(value = "/greeter/json", method = RequestMethod.GET)
    public @ResponseBody
    Greeter getGreeterInJSON() {

        Greeter greeter = new Greeter();

        greeter.setName("default");
        greeter.setStaffName(new String[] { "ye", "lichi" });

        return greeter;

    }

    @RequestMapping(value = "/greeter/csv", method = RequestMethod.GET, consumes = "text/csv")
    public @ResponseBody
    Greeter getGreeterInCSV(HttpServletResponse response) {
        Greeter greeter = new Greeter();

        greeter.setName("default");
        greeter.setStaffName(new String[] { "ye", "lichi" });

        CsvMapper mapper = new CsvMapper();
        CsvSchema schema = mapper.schemaFor(Greeter.class);

        ObjectWriter writer = mapper.writer(schema.withLineSeparator("\n"));

        File greeterCSV = new File("greeterCSV.csv");

        try {
            writer.writeValue(greeterCSV, greeter);
        } catch (JsonGenerationException e) {
            e.printStackTrace();
        } catch (JsonMappingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return greeter;
    }
}

build.gradle依赖项:

dependencies {
    compile group: 'commons-collections', name: 'commons-collections', version: '3.2'

    compile ('org.springframework:spring-context:4.0.0.RELEASE')
    compile("org.springframework.boot:spring-boot-starter-web:0.5.0.M6")
    compile("org.thymeleaf:thymeleaf-spring3:2.0.17")

    // compile "org.codehaus.jackson:jackson-mapper-asl:1.9.13"
    compile 'com.fasterxml.jackson.core:jackson-databind:2.3.0'
    compile 'com.fasterxml.jackson.core:jackson-core:2.3.0'
    compile 'com.fasterxml.jackson.core:jackson-annotations:2.3.0'

    compile 'com.fasterxml.jackson.dataformat:jackson-dataformat-csv:2.3.0'

    testCompile group: 'junit', name: 'junit', version: '4.+'
    testCompile "org.mockito:mockito-all:1.9.5"
}

编辑:

---

Tomcat错误:

HTTP状态415 -

类型状态报告

信息

说明服务器拒绝此请求,因为请求实体的格式不是所请求方法的请求资源所支持的格式.

Answer 1

您不想消费而是生成csv。按照您的方式，该服务期望以 csv 格式提供输入，这就是它抱怨“请求实体的格式不受支持”的原因。这里的关键是“请求”——它需要一些 csv 格式的输入。将“消费”更改为“生产”应该可以解决您的问题。