java spring-boot 出现“400 bad request”错误，详情如下
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/36028046/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
spring-boot get a "400 bad request" error, the detail is followed
提问by user2688702
I am very new on spring boot. So the question I asked maybe cause by I missing something. I use spring boot 1.3 and freemarker to build a web site. when I submit a form( which some properties I don't fill in and this situation is I need) I get a "400 bad request". However, when I fill in all the properties of the form and submit, it works. So, what's the reason and How can I fix it?
我对弹簧靴很陌生。所以我问的问题可能是因为我遗漏了一些东西。我使用 spring boot 1.3 和 freemarker 来构建一个网站。当我提交表单（我没有填写某些属性，而这种情况是我需要的）时，我收到“400 个错误的请求”。但是，当我填写表单的所有属性并提交时，它起作用了。那么，是什么原因，我该如何解决？
The form is the following code.
表格如下代码。
<label for="steelName" >品名:</label>
<input type="text" id="steelName" name="steelName" placeholder="品名" value="${steelName!}" required><br/>
<label for="steelCode" >钢种:</label>
<input type="text" id="steelCode" name="steelCode" placeholder="钢种" value="${steelCode!}" required><br/>
<label for="basic_price" >基价:</label>
<input type="text" id="basicPrice" name="basicPrice" placeholder="2000" value="${basicPrice!}" required>
<label>元</label><br/>
<label for="steel_factory" >钢厂:</label>
<input type="text" id="steelFactory" name="steelFactory" placeholder="钢厂名称" value="${steelFactory!}" >
<label for="city" > 城市:</label>
<input type="text" id="city" name="city" placeholder="城市" value="${city!}" >
<br/>
<label for="width" >宽度范围:</label>
<input type="text" id="lowWidth" name="lowWidth" placeholder="1.0" value="${lowWidth!}" >
<label for=""> - </label>
<input type="text" id="highWidth" name="highWidth" placeholder="1.6" value="${highWidth!}" >
<label for=""> m </label>
<label for="width_step"> 宽度步长：</label>
<input type="text" id="widthStep" name="widthStep" placeholder="1.0" value="${widthStep!}" >
<label for=""> m </label>
<label for="width_price"> 宽度差价：</label>
<input type="text" id="widthPrice" name="widthPrice" placeholder="1.0" value="${widthPrice!}" >
<label for=""> 元 </label>
</br>
<label for="thickness" >厚度范围:</label>
<input type="text" id="lowThickness" name="lowThickness" placeholder="1.0" value="${lowThickness!}" >
<label for=""> - </label>
<input type="text" id="highThickness" name="highThickness" placeholder="1.6" value="${highThickness!}" >
<label for=""> cm </label>
<label for="thickness_step"> 厚度步长：</label>
<input type="text" id="thicknessStep" name="thicknessStep" placeholder="1.0" value="${thicknessStep!}" >
<label for=""> cm </label>
<label for="thickness_price"> 厚度差价：</label>
<input type="text" id="thicknessPrice" name="thicknessPrice" placeholder="1.0" value="${thicknessPrice!}" >
<label for=""> 元 </label>
</br>
<button type="submit">提交</button>
</form>
The Controller.java
控制器.java
@RequestMapping(value = "/admin/add/steel", method = RequestMethod.POST)
public String addSteel(@ModelAttribute("steel")Steel steel, Model model) {
log.info("add "+steel.getSteelName()+" info.");
//model.addAttribute(FormAuthenticationFilter.DEFAULT_USERNAME_PARAM, userName);
steel = steelService.save(steel);
model.addAttribute("steel", steel);
return "steel/detail";
}
The steel entity
钢铁实体
@Entity
@Table(name = "t_steel")
public class Steel extends IdEntity {
@Column(name = "steel_name", unique = true)
private String steelName;
@Column(name = "steel_code", unique = true)
private String steelCode;
@Column(name = "basic_price", unique = true)
private int basicPrice;
@Column(name = "steel_factory", nullable = true)
private String steelFactory = null;
@Column(name = "city", nullable = true)
private String city = null;
@Column(name = "low_width", nullable = true)
private Double lowWidth = null;
@Column(name = "high_width", nullable = true)
private Double highWidth = null;
@Column(name = "width_step", nullable = true)
private Double widthStep = null;
@Column(name = "width_price", nullable = true)
private Integer widthPrice = null;
The question:
问题：
回答by Daniel Lavoie
Add the following property to your spring boot configuration logging.level.org.springframework.web=DEBUG. With such log level, you will have detailled error explaining the cause of the 400.
将以下属性添加到您的 Spring Boot 配置中logging.level.org.springframework.web=DEBUG。使用这样的日志级别，您将获得解释 400 原因的详细错误。
You could also drop a logback.xml in in your classpath (src/main/resources for exemple) and add this appender :
你也可以在你的类路径（例如 src/main/resources）中放入一个 logback.xml 并添加这个 appender：
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<logger name="org.springframework.web" level="DEBUG" />
<root level="info">
<appender-ref ref="STDOUT" />
</root>
</configuration>
Good luck.
祝你好运。
