SpringMVC接收資料一般是新建一個VO物件接收,或者是使用@RequestParam
或者@PathVariable
接收引數格式,很少會後端接收一個JSON資料格式,不過也會出現,其實這個很簡單,只需要使用@RequestBody
即可。
匯入Jar包
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.9.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.9.2</version>
</dependency>
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事例程式
JSONController.java
@ResponseBody
@RequestMapping(value="upjson", method = RequestMethod.POST)
public Book getJSONData(@RequestBody Book book){
log.info("獲取到的資料為:"+book);
book.setBookName("JavaJSON資料");
return book;
}
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Book.java
public class Book {
private String bookName;
private Double price;
public String getBookName() {
return bookName;
}
public void setBookName(String bookName) {
this.bookName = bookName;
}
public Double getPrice() {
return price;
}
public void setPrice(Double price) {
this.price = price;
}
@Override
public String toString() {
return "Book [bookName=" + bookName + ", price=" + price + "]";
}
}
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前端提交
<button onclick="upJSON()">點選傳輸JSON</button>
<script>
function upJSON(){
$.ajax({
type:'post',
url:'${request.contextPath}/upjson',
dataType:'json',
contentType:"application/json;charset=UTF-8",
data:JSON.stringify({"bookName":"Lucene","price":88.8}),
async:false,
error:function(result){
alert(result);
},
success:function(result){
alert(JSON.stringify(result))
}
});
}
</script>
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一般這樣可以實現,而且網上的資源也是這樣總結,不過我這邊還有點問題,這樣寫還是會一直報錯,不支援application/json;charset=UTF-8
格式,出現org.springframework.web.HttpMediaTypeNotSupportedException
異常。然後發現還需要在xml檔案中配置,才會正常。
配置
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter
.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>application/json;charset=UTF-8</value>
</list>
</property>
</bean>
<bean class="org.springframework.web.servlet.mvc.
method.annotation.RequestMappingHandlerAdapter">
<property name="messageConverters">
<list >
<ref bean="mappingJacksonHttpMessageConverter" />
</list>
</property>
</bean>
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如上配置就可以完美執行了。