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  • SpringMVC之传值

    一、jsp中:

    <form action="SpringMVCController/testparam" method="get">
    		name:<input name="uname" type="text"><br/>
    		age: <input name="uage" type="text"><br/>
    		<input type="submit" value="查">
    	</form>
    

      controller中:

    @RequestMapping(value="testparam")
    	public String welcome9(@RequestParam("uname") String name,@RequestParam(value="uage",required=false,defaultValue="23") Integer age){
    		System.out.println(name);
    		System.out.println(age);
    		return "success";
    	}
    

      required=false意思是该值可以不输入。

    二、接受对象(Student student):

    原始servlet接受jsp中的数据,然后Student student = new Student();

    student.setId=...太麻烦。

    创建实体类Student和Address。

    Student.java:

    package org.ruangong.entity;
    
    public class Student {
    	private int id;
    	private String name;
    	private int age;
    	private Address address;
    	public int getId() {
    		return id;
    	}
    	public void setId(int id) {
    		this.id = id;
    	}
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	public int getAge() {
    		return age;
    	}
    	public void setAge(int age) {
    		this.age = age;
    	}
    	public Address getAddress() {
    		return address;
    	}
    	public void setAddress(Address address) {
    		this.address = address;
    	}
    }
    

      Address.java:

    package org.ruangong.entity;
    
    public class Address {
    	private String homeAddress;
    	private String schoolAddress;
    	public String getHomeAddress() {
    		return homeAddress;
    	}
    	public void setHomeAddress(String homeAddress) {
    		this.homeAddress = homeAddress;
    	}
    	public String getSchoolAddress() {
    		return schoolAddress;
    	}
    	public void setSchoolAddress(String schoolAddress) {
    		this.schoolAddress = schoolAddress;
    	}
    }
    

      controller.java:

    @RequestMapping(value="testObjectProperties")
    	public String testObjectProperties(Student student){
    		System.out.println(student.getId()+","+student.getName()+","+student.getAge()+","+student.getAddress().getHomeAddress()+","+student.getAddress().getSchoolAddress());
    		return "success";
    	}
    

      jsp中:

    <form action="SpringMVCController/testObjectProperties" method="get">
    		id:<input name="id" type="text"><br/>
    		name:<input name="name" type="text"><br/>
    		age: <input name="age" type="text"><br/>
    		homeAddress: <input name="address.homeAddress" type="text"><br/>
    		schoolAddress: <input name="address.schoolAddress" type="text"><br/>
    		<input type="submit" value="确定">
    	</form>
    

      允许级联属性。input标签中的name值必须跟实体类属性值相同。

    三、在controller中任然可以使用原始servlet中的东西:

    只需要:

    @RequestMapping(value="testServletAPI")
    	public String testServletAPI(HttpServletRequest request){
    		String name = request.getParameter("name");
    		System.out.println(name);
    		return "success";
    	}
    

      

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  • 原文地址:https://www.cnblogs.com/jccjcc/p/14043524.html
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