@RequestBody
因为一直觉得传简单对象直接不用注解也可以自动组装，就以为Spring可以为我们组装所有类型的对象。但今天测试过，原来象Map，List或复合对象都必需使用这个注解才可以正确组装，以下是我的测试代码：
首先写个测试的Controller：
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletResponse;
import org.cunframework.core.common.controller.BaseController;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.alibaba.fastjson.JSON;
class A{
private String name;
private String value;
public String getName() {
return name;
}
public String getValue() {
return value;
}
public void setName(String name) {
this.name = name;
}
public void setValue(String value) {
this.value = value;
}
}
class B{
private List<A> a;
private String count;
public List<A> getA() {
return a;
}
public String getCount() {
return count;
}
public void setA(List<A> a) {
this.a = a;
}
public void setCount(String count) {
this.count = count;
}
}
@Scope("prototype")
@Controller
@RequestMapping("/rb")
public class RequestBodyController extends BaseController{
@RequestMapping(value = "test1")
@ResponseBody
public Map test1(A a,HttpServletResponse response) {
try {
System.out.println(JSON.toJSONString(a));
return toSuccess();
} catch (Exception e) {
e.printStackTrace();
return toError();
}
}
@RequestMapping(value = "test2")
@ResponseBody
public Map test2(List<A> a,HttpServletResponse response) {
try {
System.out.println(JSON.toJSONString(a));
return toSuccess();
} catch (Exception e) {
e.printStackTrace();
return toError();
}
}
@RequestMapping(value = "test3")
@ResponseBody
public Map test3(@RequestBody List<A> a,HttpServletResponse response) {
try {
System.out.println(JSON.toJSONString(a));
return toSuccess();
} catch (Exception e) {
e.printStackTrace();
return toError();
}
}
@RequestMapping(value = "test4")
@ResponseBody
public Map test4(B b,HttpServletResponse response) {
try {
System.out.println(JSON.toJSONString(b));
return toSuccess();
} catch (Exception e) {
e.printStackTrace();
return toError();
}
}
@RequestMapping(value = "test5")
@ResponseBody
public Map test5(@RequestBody B b,HttpServletResponse response) {
try {
System.out.println(JSON.toJSONString(b));
return toSuccess();
} catch (Exception e) {
e.printStackTrace();
return toError();
}
}
}测试用的html文件：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script src="http://lib.sinaapp.com/js/jquery/1.9.1/jquery-1.9.1.min.js"></script>
<script>
function ajax(url,data,contentType){
$.ajax({
type: "POST",
contentType: contentType,
url: url,
data: data,
success: function(data){
console.log(data);
},
error: function(XMLHttpRequest, textStatus, errorThrown) {
alert("Error Occured!");
}
});
}
function test1(){
var data = {
name:123,
value:456
};
ajax(
"http://localhost:8080/orcs/rb/test1.do",
data,
"application/x-www-form-urlencoded"
)
}
function test2(){
var data = [
{
name:123,
value:456
},
{
name:222,
value:222
},
{
name:333,
value:444456
}
];
ajax(
"http://localhost:8080/orcs/rb/test2.do",
data,
"application/x-www-form-urlencoded"
);
}
function test3(){
var data = [
{
name:123,
value:456
},
{
name:222,
value:222
},
{
name:333,
value:444456
}
];
ajax(
"http://localhost:8080/orcs/rb/test3.do",
JSON.stringify(data),
"application/json"
);
}
function test4(){
var data = {
a:[{
name:123,
value:456
},
{
name:222,
value:222
},
{
name:333,
value:444456
}],
count:222
}
ajax(
"http://localhost:8080/orcs/rb/test4.do",
data,
"application/x-www-form-urlencoded"
);
}
function test5(){
var data = {
a:[{
name:123,
value:456
},
{
name:222,
value:222
},
{
name:333,
value:444456
}],
count:222
};
ajax(
"http://localhost:8080/orcs/rb/test5.do",
JSON.stringify(data),
"application/json"
);
}
</script>
</head>
<body>
<button onclick="test1()">btn1</button>
<button onclick="test2()">btn2</button>
<button onclick="test3()">btn3</button>
<button onclick="test4()">btn4</button>
<button onclick="test5()">btn5</button>
</body>
</html>发现@RequestBody这个注解，使用时对ajax有些要求：
- 数据必需要用
JSON.stringify(data)处理 - contentType类型必需为
application/json
而不加这个，注解组装简单对象时，则：
- 数据直接用json，不必处理
- contentType类型默认为
application/x-www-form-urlencoded即可