Java拆分并用值替换字符串

时间:2013-05-02 10:18:17

标签: java string split

我有一个跟随字符串,我必须拆分并在某些条件下替换值

http://localhost:8080/api/upload/form/{uploadType}/{uploadName}

我必须仅为{uploadType} / {uploadName}替换值。我真的不知道如何用价值取代它们。

{uploadType}/{uploadName}中的字符串可以是任何要替换的类型。

我尝试过以下内容:

package com.test.poc;

public class TestString {
public static void main(String[] args) throws ClassNotFoundException {
    String toBeFixed = "http://localhost:8080/api/upload/form/{uploadType}/{uploadName}"; 
    String[] toReplaceWith =toBeFixed.split("{");
for (String string : toReplaceWith) {
    System.out.println("string : "+string);
}   
}

}

但我得到以下例外:

Exception in thread "main" java.util.regex.PatternSyntaxException: Illegal repetition
{
    at java.util.regex.Pattern.error(Pattern.java:1713)
    at java.util.regex.Pattern.closure(Pattern.java:2775)
    at java.util.regex.Pattern.sequence(Pattern.java:1889)
    at java.util.regex.Pattern.expr(Pattern.java:1752)
    at java.util.regex.Pattern.compile(Pattern.java:1460)
    at java.util.regex.Pattern.<init>(Pattern.java:1133)
    at java.util.regex.Pattern.compile(Pattern.java:823)
    at java.lang.String.split(String.java:2292)
    at java.lang.String.split(String.java:2334)
    at com.test.poc.TestString.main(TestString.java:9)

编辑:

这是我根据Sean Patrick Floyd回答

尝试的方法
public String doPOSTPathVariable(String uri,List paramsList) throws IllegalArgumentException, IllegalAccessException, InstantiationException, Exception{
        String uriString="";
        UriComponents uriComponents = UriComponentsBuilder.fromUriString(uri).build();
        for (int j = 0; j<= paramsList.size(); j++) {
            System.out.println("path variable");
            MethodParams methodParams;
            methodParams =(MethodParams) paramsList.get(j);

            if(methodParams.isPrimitive() && methodParams.getDataType()=="boolean"){
                  uriString = uriComponents.expand(true).encode().toUriString();
            }
            if(methodParams.isPrimitive() && methodParams.getDataType()=="java.math.BigDecimal"){
                uriString = uriComponents.expand(123).encode().toUriString();
            }
            if(methodParams.isPrimitive() && methodParams.getDataType()=="java.lang.String"){
                uriString = uriComponents.expand("hexgen").encode().toUriString();
            }
       } 
        return uriString;
    }

但我得到以下例外:

java.lang.IllegalArgumentException: Not enough variable values available to expand 'uploadName'
    at org.springframework.web.util.UriComponents$VarArgsTemplateVariables.getValue(UriComponents.java:1025)
    at org.springframework.web.util.UriComponents.expandUriComponent(UriComponents.java:443)
    at org.springframework.web.util.UriComponents.access$1(UriComponents.java:431)
    at org.springframework.web.util.UriComponents$FullPathComponent.expand(UriComponents.java:800)
    at org.springframework.web.util.UriComponents.expandInternal(UriComponents.java:413)
    at org.springframework.web.util.UriComponents.expand(UriComponents.java:404)
    at com.hexgen.tools.HexgenClassUtils.doPOSTPathVariable(HexgenClassUtils.java:208)
    at com.hexgen.reflection.HttpClientRequests.handleHTTPRequest(HttpClientRequests.java:77)
    at com.hexgen.reflection.HexgenWebAPITest.main(HexgenWebAPITest.java:115)

有人可以帮我这个吗?

5 个答案:

答案 0 :(得分:2)

也许UriBuilder

UriBuilder.fromPath("http://localhost:8080/api/upload/form/{uploadType}/{uploadName}").build("foo", "bar");

(方便地使用您正在使用的确切格式)

答案 1 :(得分:2)

如果您使用Spring MVC,则可以使用此功能with the new URI builder technology

UriComponents uriComponents =
    UriComponentsBuilder.fromUriString(
        "http://example.com/hotels/{hotel}/bookings/{booking}").build();

URI uri = uriComponents.expand("42", "21").encode().toUri();
// or:
String uriString = uriComponents.expand("42", "21").encode().toUriString();

(事实上你仍然可以使用这项技术,即使你不使用Spring MVC,但是你需要在Classpath上安装Spring MVC jar,很明显)

答案 2 :(得分:1)

你可以尝试这个:

public class TestString {
public static void main(String[] args) throws ClassNotFoundException {
String toBeFixed = "http://localhost:8080/api/upload/form/{uploadType}/{uploadName}"; 
String[] toReplaceWith =toBeFixed.split("\\{");
for (String string : toReplaceWith) {
System.out.println("string : "+string);
}   
}

}

答案 3 :(得分:1)

UrlBuilder是解决方案,但如果您只是查看分隔符,也可以使用子字符串:

String url = "http://localhost:8080/api/upload/form/{uploadType}/{uploadName}";
int lastSlash = url.lastIndexOf('/');
int secondLastSlash = url.substring(0, lastSlash).lastIndexOf('/');
System.out.println(url.substring(secondLastSlash+1, lastSlash));
System.out.println(url.substring(lastSlash+1));

要删除花括号,可以在字符串上使用String.replace('{','')和String.replace('}','')

答案 4 :(得分:0)

{是用于范围重复的正则表达式meta-character

之前

toBeFixed = toBeFixed.replaceAll("\\{", "\n");   

另见文档:http://docs.oracle.com/javase/6/docs/api/java/util/regex/Pattern.html

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