SpringMVC—对Ajax的处理（含 JSON 类型）(2)
这里编写了一个通用的类型转换器： 用来转换形如： firstName=jack&lastName=lily&gender=1&foods=Steak&foods=Pizza"e=Enter+your+favorite+quote!&education=Jr.High&tOfD=Day 到 Student 对象。 /**
* @author solverpeng
* @create 2016-08-22-17:37 */public final class InjectUtil<T> { private static final Logger LOGGER = LoggerFactory.getLogger(InjectUtil.class); public static <T> T converter2Obj(String source, Class<T> tClass) {
T t = null; try {
t = tClass.newInstance();
Map<String, Object> params = new HashMap<String, Object>(); if(source != null && source.length() > 0) {
String[] fields = source.split("&"); for(String field : fields) {
String[] fieldKeyValue = field.split("\\=");
String fieldKey = fieldKeyValue[0];
String fieldValue = fieldKeyValue[1]; if (params.containsKey(fieldKey)) {
Object keyValueRetrieved = params.get(fieldKey); if (keyValueRetrieved instanceof String) {
ArrayList<String> values = new ArrayList<>();
values.add(keyValueRetrieved.toString());
values.add(fieldValue);
params.put(fieldKey, values);
} else {
((ArrayList<String>) keyValueRetrieved).add(fieldValue);
}
} else {
params.put(fieldKey, fieldValue);
}
}
}
BeanUtils.populate(t, params);
} catch(InstantiationException | IllegalAccessException | InvocationTargetException e) {
e.printStackTrace();
LOGGER.error("String convert to Bean failure!", e);
} return t;
} } 不要忘记在 SpringMVC 中添加自定义的转换器。 e3:也可以在 handler 方法中来调用上面我编写的通用的类型转换器来完成解析。 @RequestMapping("/testStudent")public String testStudent(@RequestParam("student") String studentStr, String amount) {
System.out.println("studentStr:" + studentStr);
System.out.println("amount：" + amount); return "success";
}
说明：对于复杂数据来说，我们借助不了 SpringMVC，只能借助于第三方，或是自己来编写解析器来解析。 ★多表单一次提交 表单数据： <form action="" method="post" id="form2">
First Name:<input type="text" name="firstName" maxlength="12" size="12"/> <br/>
Last Name:<input type="text" name="lastName" maxlength="36" size="12"/> <br/>
Gender:<br/>
Male:<input type="radio" name="gender" value="1"/><br/>
Female:<input type="radio" name="gender" value="0"/><br/>
<%–Favorite Food:<br/>
Steak:<input type="checkbox" name="foods" value="Steak"/><br/>
Pizza:<input type="checkbox" name="foods" value="Pizza"/><br/>
Chicken:<input type="checkbox" name="foods" value="Chicken"/><br/>–%>
<textarea wrap="physical" cols="20" name="quote" rows="5">Enter your favorite quote!</textarea><br/>
Select a Level of Education:<br/>
<select name="education">
<option value="Jr.High">Jr.High</option>
<option value="HighSchool">HighSchool</option>
<option value="College">College</option>
</select><br/>
Select your favorite time of day:<br/>
<select size="3" name="tOfD">
<option value="Morning">Morning</option>
<option value="Day">Day</option>
<option value="Night">Night</option>
</select>
<p><input type="submit"/></p></form><form action="" method="post" id="form1">
First Name:<input type="text" name="firstName" maxlength="12" size="12"/> <br/>
Last Name:<input type="text" name="lastName" maxlength="36" size="12"/> <br/>
Gender:<br/>
Male:<input type="radio" name="gender" value="1"/><br/>
Female:<input type="radio" name="gender" value="0"/><br/>
<%– Favorite Food:<br/>
Steak:<input type="checkbox" name="foods" value="Steak"/><br/>
Pizza:<input type="checkbox" name="foods" value="Pizza"/><br/>
Chicken:<input type="checkbox" name="foods" value="Chicken"/><br/>–%>
<textarea wrap="physical" cols="20" name="quote" rows="5">Enter your favorite quote!</textarea><br/>
Select a Level of Education:<br/>
<select name="education">
<option value="Jr.High">Jr.High</option>
<option value="HighSchool">HighSchool</option>
<option value="College">College</option>
</select><br/>
Select your favorite time of day:<br/>
<select size="3" name="tOfD">
<option value="Morning">Morning</option>
<option value="Day">Day</option>
<option value="Night">Night</option>
</select></form>
e1: 同时需要定义一个 Students 类： public class Students { private List<Student> students; public List<Student> getStudents() { return students;
} public void setStudents(List<Student> students) { this.students = students;
}
} 请求： $('form').submit(function() {
$.ajax({
url : "testStudent",
data : JSON.stringify({ "students": [
$('#form1').serializeObject()
,
$('#form2').serializeObject()
]
}),
contentType:"application/json;charset=utf-8",
type : "post",
success : function (result) {
console.log(result);
}
}); return false;
}); handler 方法： @RequestMapping("/testStudent")public String testStudent(@RequestBody Students students) { for(Student student : students.getStudents()) {
System.out.println("student:" + student);
} return "success";
} 可以正常打印。 e2:不额外增加类，即不定义 Students 请求： $('form').submit(function() {
$.ajax({
url : "testStudent",
data : JSON.stringify([
$('#form1').serializeObject(),
$('#form2').serializeObject()
]),
contentType:"application/json;charset=utf-8",
type : "post",
success : function (result) {
console.log(result);
}
}); return false;
}); handler 方法： e21:通过数组来接收 @RequestMapping("/testStudent")public String testStudent(@RequestBody Student[] students) { for(Student student : students) {
System.out.println("student: " + student);
} return "success";
} e22:通过 List 来接收 @RequestMapping("/testStudent")public String testStudent(@RequestBody List<Student> students) { for(Student student : students) {
System.out.println("student: " + student);
} return "success";
} ★一个表单多个对象 表单对象如： e1: <form action="" method="post" id="form">
First Name:<input type="text" name="firstName" maxlength="12" size="12"/> <br/>
Last Name:<input type="text" name="lastName" maxlength="36" size="12"/> <br/>
Gender:<br/>
Male:<input type="radio" name="gender" value="1"/><br/>
Female:<input type="radio" name="gender" value="0"/><br/>
<%–Favorite Food:<br/>
Steak:<input type="checkbox" name="foods" value="Steak"/><br/>
Pizza:<input type="checkbox" name="foods" value="Pizza"/><br/>
Chicken:<input type="checkbox" name="foods" value="Chicken"/><br/>–%>
<textarea wrap="physical" cols="20" name="quote" rows="5">Enter your favorite quote!</textarea><br/>
Select a Level of Education:<br/>
<select name="education">
<option value="Jr.High">Jr.High</option>
<option value="HighSchool">HighSchool</option>
<option value="College">College</option>
</select><br/>
Select your favorite time of day:<br/>
<select size="3" name="tOfD">
<option value="Morning">Morning</option>
<option value="Day">Day</option>
<option value="Night">Night</option>
</select> First Name:<input type="text" name="firstName" maxlength="12" size="12"/> <br/>
Last Name:<input type="text" name="lastName" maxlength="36" size="12"/> <br/>
Gender:<br/>
Male:<input type="radio" name="gender" value="1"/><br/>
Female:<input type="radio" name="gender" value="0"/><br/>
<%– Favorite Food:<br/>
Steak:<input type="checkbox" name="foods" value="Steak"/><br/>
Pizza:<input type="checkbox" name="foods" value="Pizza"/><br/>
Chicken:<input type="checkbox" name="foods" value="Chicken"/><br/>–%>
<textarea wrap="physical" cols="20" name="quote" rows="5">Enter your favorite quote!</textarea><br/>
Select a Level of Education:<br/>
<select name="education">
<option value="Jr.High">Jr.High</option>
<option value="HighSchool">HighSchool</option>
<option value="College">College</option>
</select><br/>
Select your favorite time of day:<br/>
<select size="3" name="tOfD">
<option value="Morning">Morning</option>
<option value="Day">Day</option>
<option value="Night">Night</option>
</select>
<p><input type="submit"/></p></form> e2: <form action="" method="post">
First Name:<input type="text" name="firstName[0]" maxlength="12" size="12"/> <br/>
Last Name:<input type="text" name="lastName[0]" maxlength="36" size="12"/> <br/>
Gender:<br/>
Male:<input type="radio" name="gender[0]" value="1"/><br/>
Female:<input type="radio" name="gender[0]" value="0"/><br/>
Favorite Food:<br/>
Steak:<input type="checkbox" name="foods[0]" value="Steak"/><br/>
Pizza:<input type="checkbox" name="foods[0]" value="Pizza"/><br/>
Chicken:<input type="checkbox" name="foods[0]" value="Chicken"/><br/>
<textarea wrap="physical" cols="20" name="quote[0]" rows="5">Enter your favorite quote!</textarea><br/>
Select a Level of Education:<br/>
<select name="education[0]">
<option value="Jr.High">Jr.High</option>
<option value="HighSchool">HighSchool</option>
<option value="College">College</option>
</select><br/>
Select your favorite time of day:<br/>
<select size="3" name="tOfD[0]">
<option value="Morning">Morning</option>
<option value="Day">Day</option>
<option value="Night">Night</option>
</select> First Name:<input type="text" name="firstName[1]" maxlength="12" size="12"/> <br/>
Last Name:<input type="text" name="lastName[1]" maxlength="36" size="12"/> <br/>
Gender:<br/>
Male:<input type="radio" name="gender[1]" value="1"/><br/>
Female:<input type="radio" name="gender[1]" value="0"/><br/>
Favorite Food:<br/>
Steak:<input type="checkbox" name="foods[1]" value="Steak"/><br/>
Pizza:<input type="checkbox" name="foods[1]" value="Pizza"/><br/>
Chicken:<input type="checkbox" name="foods[1]" value="Chicken"/><br/>
<textarea wrap="physical" cols="20" name="quote[1]" rows="5">Enter your favorite quote!</textarea><br/>
Select a Level of Education:<br/>
<select name="education[1]">
<option value="Jr.High">Jr.High</option>
<option value="HighSchool">HighSchool</option>
<option value="College">College</option>
</select><br/>
Select your favorite time of day:<br/>
<select size="3" name="tOfD[1]">
<option value="Morning">Morning</option>
<option value="Day">Day</option>
<option value="Night">Night</option>
</select> <p><input type="submit"/></p></form> 来看经过处理后的数据： e1: （1）JSON.stringify($('form').serializeObject())： {"firstName":["jack","tom"],"lastName":["aa","lily"],"foods":["Steak","Pizza","Steak"],"quote":["Enter your favorite quote!","Enter your favorite quote!"],"education":["Jr.High","Jr.High"],"tOfD":["Day","Day"],"gender":"1"} （2）$('form').serialize()： firstName=jack&lastName=aa&foods=Steak&foods=Pizza"e=Enter+your+favorite+quote!&education=Jr.High&tOfD=Day&firstName=tom&lastName=lily&gender=1&foods=Steak"e=Enter+your+favorite+quote!&education=Jr.High&tOfD=Day 说明： 第一种是无法处理的，没办法分清数组中的值是属于哪个对象的。 第二种方式可以处理，但是需要编写自定义的类型转换器，这里不进行说明。有兴趣的童鞋，请自行探索。 e2: （1）JSON.stringify($('form').serializeObject()): {"firstName[0]":"aa","lastName[0]":"bb","gender[0]":"1","foods[0]":"Pizza","quote[0]":"Enter your favorite quote!","education[0]":"Jr.High","tOfD[0]":"Day", "firstName[1]":"ds","lastName[1]":"cc","gender[1]":"1","foods[1]":["Steak","Pizza"],"quote[1]":"Enter your favorite quote!","education[1]":"Jr.High","tOfD[1]":"Day"} （2）$('form').serialize(): firstName%5B0%5D=aa&lastName%5B0%5D=bb&gender%5B0%5D=1&foods%5B0%5D=Pizza"e%5B0%5D=Enter+your+favorite+quote!&education%5B0%5D=Jr.High&tOfD%5B0%5D=Day& firstName%5B1%5D=ds&lastName%5B1%5D=cc&gender%5B1%5D=1&foods%5B1%5D=Steak&foods%5B1%5D=Pizza"e%5B1%5D=Enter+your+favorite+quote!&education%5B1%5D=Jr.High&tOfD%5B1%5D=Day 说明： 第一种看着有规律可循，貌似可以进行解析，但是不是一个标准的 JSON 格式的数据。 第二种甚至都出现了乱码，没有想到解析的办法。 来看看第一种，同样这里提供一种思路，因为实现起来比较费劲。 思路：使用正则 like this : Gson gson = new Gson();
String jsonInString = "{\"student[0].firstName\": \"asdf\",\"student[0].lastName\": \"sfd\",\"student[0].gender\": \"1\",\"student[0].foods\":[\"Steak\",\"Pizza\"],\"student[0].quote\": \"Enter your favorite quote!\",\"student[0].education\": \"Jr.High\",\"student[0].tOfD\": \"Day\",\"student[1].firstName\": \"sf\",\"student[1].lastName\": \"sdf\",\"student[1].gender\": \"1\",\"student[1].foods\": [\"Pizza\",\"Chicken\"],\"student[1].quote\": \"Enter your favorite quote!\",\"student[1].education\": \"Jr.High\",\"student[1].tOfD\": \"Night\"}";
String jsonWithoutArrayIndices = jsonInString.replaceAll("\\[\\d\\]", "").replaceAll("student.","");
String jsonAsCollection = "[" + jsonWithoutArrayIndices + "]";
String jsonAsValidCollection = jsonAsCollection.replaceAll(",\"student.firstName\"","},{\"student.firstName\"");
System.out.println(jsonAsValidCollection);
Student[] students = gson.fromJson(jsonAsValidCollection, Student[].class);
System.out.println("-----------------------------------------------");
System.out.println(students[0]);
System.out.println("-----------------------------------------------");
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