宠物商店项目错误整理

1.

后端:

Resolved exception caused by Handler execution: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/x-www-form-urlencoded;charset=UTF-8' not supported

前端:

报415错误

原因,ajax中contentType误写为contextType

2.

后端:

2018-02-09 14:04:01.665  WARN 6628 --- [nio-8080-exec-1] .w.s.m.s.DefaultHandlerExceptionResolver : Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: Required request body is missing: public org.springframework.http.ResponseEntity com.zyc.controller.AccountController.login(com.zyc.model.Account)
2018-02-09 14:04:01.665  WARN 6628 --- [nio-8080-exec-1] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved exception caused by Handler execution: org.springframework.http.converter.HttpMessageNotReadableException: Required request body is missing: public org.springframework.http.ResponseEntity com.zyc.controller.AccountController.login(com.zyc.model.Account)

前端:

报400错误

检查发现表单中的数据转换成json后,json值为undefined

原因,

var json=JSON.stringify($("#form1").serializeObject);
改为

var json=JSON.stringify($("#form1").serializeObject());///?()

serializeObject后加上()。旧版的ij编译器在直接选择serializeObject时并没有自动加括号。


3.

后端:

2018-02-09 14:18:53.569 ERROR 7460 --- [nio-8080-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.binding.BindingException: Parameter 'username' not found. Available parameters are [arg1, arg0, param1, param2]] with root cause

org.apache.ibatis.binding.BindingException: Parameter 'username' not found. Available parameters are [arg1, arg0, param1, param2]

前端:

报500错误

原因,

dao层,也就是mapper层中

Account login(String username,String password);
改为

Account login(@Param("username") String username,@Param("password")String password);

4.

后端:

 Error querying database.  Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'where password = '41234321'' at line 1

前端:

报500错误

原因,

dao层中@Select里应为

"where username = #{username,jdbcType=VARCHAR} and"+
" password = #{password,jdbcType=VARCHAR}"

"where username = #{username,jdbcType=VARCHAR} and",
"password = #{password,jdbcType=VARCHAR}"

不能是

"where username = #{username,jdbcType=VARCHAR} and"+
" where password = #{password,jdbcType=VARCHAR}"

也不能是

"where username = #{username,jdbcType=VARCHAR} and"+
"password = #{password,jdbcType=VARCHAR}"

5

注册时宠物种类下拉菜单的数据出不来

后端不报错

前端409错误

发现是在service层将

example.createCriteria().andCatidIsNotNull();

错写成了

example.createCriteria().andCatidIsNull();

6

后端

WARN 7528 --- [io-8080-exec-10] .w.s.m.s.DefaultHandlerExceptionResolver : Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Can not deserialize value of type java.lang.Integer from String "data[index].catid": not a valid Integer value; nested exception is com.fasterxml.jackson.databind.exc.InvalidFormatException: Can not deserialize value of type java.lang.Integer from String "data[index].catid": not a valid Integer value
 at [Source: java.io.PushbackInputStream@2e22a57c; line: 1, column: 153] (through reference chain: com.zyc.model.Account["profile"]->com.zyc.model.Profile["catid"])

前端报400错误

原因是reg.js中应该是

$("#category").append("+data[index].name+"")

而不是

$("#category").append("+data[index].name+"")

注意上述代码option标签中value中的值。下图中lang和catid断点值会让错误更清晰

宠物商店项目错误整理_第1张图片




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