[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; $OOZ-+8
} Z@ AHe`A
int i1=l; I`Goc!5t
int i2=mid+1; ^3B)i=
for(int cur=l;cur<=r;cur++){ &<8Q/m]5
if(i1==mid+1) H{Tt>k
data[cur]=temp[i2++]; <X9 T}g
else if(i2>r) {.c(Sw}Eo
data[cur]=temp[i1++]; |^&n\vXv
else if(temp[i1] data[cur]=temp[i1++]; <-KHy`u
else ,'[&" Eg
data[cur]=temp[i2++]; Sj?u^L8es}
} `tZu~ n
} za{z2#aJ
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} 6f1%5&si
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改进后的归并排序: g3[Zh=+]E
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package org.rut.util.algorithm.support; U^jxKBq^
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import org.rut.util.algorithm.SortUtil; qFEGV+
~P&Brn"=Rs
/** D5]4(]k&
* @author treeroot F\&Sn1>k
* @since 2006-2-2 .Cv0Ze
* @version 1.0 S;a'@5
*/ %JmRJpCvR
public class ImprovedMergeSort implements SortUtil.Sort { _ 4:@+{
o!.\+[
private static final int THRESHOLD = 10; Wr3j8"f/
x:'M\c7
/* ~3k& =3d]
* (non-Javadoc) W_k;jy_{9
* 566vjE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yKE[,"
*/ ,>"rcd
public void sort(int[] data) { ,#=ykg*~/
int[] temp=new int[data.length]; kO3{2$S6
mergeSort(data,temp,0,data.length-1); .yz-o\,gF%
} ~"\qX+
/Mk85C79
private void mergeSort(int[] data, int[] temp, int l, int r) { @**@W[EM
int i, j, k; dre@V(\;hQ
int mid = (l + r) / 2; X r7pFw
if (l == r) m)G=4kK52-
return; RQ?T~ASs
if ((mid - l) >= THRESHOLD) f8]Qn8
mergeSort(data, temp, l, mid); ]y&w)-0
else aoNTRJc$
insertSort(data, l, mid - l + 1); 2+KOUd&jS
if ((r - mid) > THRESHOLD) 9o-fI@9
mergeSort(data, temp, mid + 1, r); !N5+.E0j
else R Wa4O#
insertSort(data, mid + 1, r - mid); ^/;W;C{4
HI}$Z=C
for (i = l; i <= mid; i++) { Wtl0qug
temp = data; mNcoR^(VN
} cSdkhRAn
for (j = 1; j <= r - mid; j++) { CPRv"T;?
temp[r - j + 1] = data[j + mid]; 4%l @
} emZ^d/A
int a = temp[l]; En@] xvE
int b = temp[r]; `x;8,7W;B
for (i = l, j = r, k = l; k <= r; k++) { ) V}q7\G~
if (a < b) { @8zp(1.
data[k] = temp[i++]; .54E*V1
a = temp; f.f5f%lO~
} else { U)oH@/q
data[k] = temp[j--]; ?O1:-vpZ
b = temp[j]; f"XFf@!
} k<b`v&G
} u15-|i{y7
} oicett=5
Eyw)f>
/** i!zh9,i>M
* @param data L||_Jsu
* @param l 5+U2@XV
* @param i c*nH=
*/ + -e8MvP
private void insertSort(int[] data, int start, int len) { }gw `,i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8J|pj4ce
} CbK&.a
} M1._{Jw5
} rCcNu
} *SkUkqP9z
gv=mz,z
堆排序： '&L;y
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package org.rut.util.algorithm.support; bXcDsP$.
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import org.rut.util.algorithm.SortUtil; `?{Hs+4P5
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/** ,e"A9ik#
* @author treeroot .y7&!a35
* @since 2006-2-2 w, 0tY=h6
* @version 1.0 )"7hyW5
*/ OCy\aCp
public class HeapSort implements SortUtil.Sort{ dZ!Wj7K)
`!MyOI`qS
/* (non-Javadoc) Peha{]U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iQ= %iou
*/ %N)o*H&
public void sort(int[] data) { v4L#^Jw(^p
MaxHeap h=new MaxHeap(); j=v1:E
h.init(data); '8~cf
for(int i=0;i h.remove(); o l67x
System.arraycopy(h.queue,1,data,0,data.length); 1jZ:@M:
} rI&GM |
Zl]Zy}p*+
private static class MaxHeap{ w>I>9O}(`
7^k`:Z
void init(int[] data){ +Ux)m4}j
this.queue=new int[data.length+1]; E-,74B&H
for(int i=0;i queue[++size]=data; A.9,p
fixUp(size); W>b(hVBE
} &]~z-0`$!
} @+",f]
G'XlsyaWrb
private int size=0; bw#zMU^E
STgl{#
private int[] queue; Kb0OauW
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public int get() { *(ex:1sW
return queue[1]; qE6:`f
} ie$QKoE
:W5*fE(i
public void remove() { kr7f<;rmJ
SortUtil.swap(queue,1,size--); = PldXw0
fixDown(1); AqVTHyCu
} [|UW_Bz
file://fixdown iV#JJ-OBq
private void fixDown(int k) { ]s jFj
int j; /U<-N'|
while ((j = k << 1) <= size) { uF>I0J#z?
if (j < size %26amp;%26amp; queue[j] j++; =SLP}bP{:
if (queue[k]>queue[j]) file://不用交换 /LhAQpUQT5
break; XgKtg-,
SortUtil.swap(queue,j,k); 9bjjo;A
k = j; @f0~a
} CAY^ `K!
} c1wM"
private void fixUp(int k) { Kzxzz6R?
while (k > 1) { / /qTMxn
int j = k >> 1; Vn1kC
if (queue[j]>queue[k]) _1*EMq6
break; c=H(*#
SortUtil.swap(queue,j,k); .LafP}%
k = j; f+0dwlIlC$
} iR4CY-
} 9>psQ0IRvr
9QJ=?bIC#
} >q <,FY!A
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} yhEU*\:
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SortUtil： D0PP
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package org.rut.util.algorithm; H;s0|KRgJ
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import org.rut.util.algorithm.support.BubbleSort; WX 79V
import org.rut.util.algorithm.support.HeapSort; /-4i"|
import org.rut.util.algorithm.support.ImprovedMergeSort; Z5Ao3O@
import org.rut.util.algorithm.support.ImprovedQuickSort; :<%K6?'@^
import org.rut.util.algorithm.support.InsertSort; mBc;^8I?23
import org.rut.util.algorithm.support.MergeSort; ,KkENp_
import org.rut.util.algorithm.support.QuickSort; wpY%"x#-+=
import org.rut.util.algorithm.support.SelectionSort; H's67E/>*
import org.rut.util.algorithm.support.ShellSort; -]5dD VSO
uW4G!Kw28
/** D>c%5h
* @author treeroot =(*Eh=Pw
* @since 2006-2-2 `e~/
* @version 1.0 2Iz@lrO6
*/ T~Jl{(s9)
public class SortUtil { =b,$jCv<,5
public final static int INSERT = 1; [?W3XUJ,Y
public final static int BUBBLE = 2; x{~-YzWho
public final static int SELECTION = 3; 5gI@~h S
public final static int SHELL = 4; xpFu$2T6P.
public final static int QUICK = 5; e}/c`7M
public final static int IMPROVED_QUICK = 6; UuT>qWxQ8
public final static int MERGE = 7; DcoTa-~
public final static int IMPROVED_MERGE = 8; 3Q[]lFJ}F
public final static int HEAP = 9; M O* m@
?C.C?h6F5B
public static void sort(int[] data) { Mim 9C]h(
sort(data, IMPROVED_QUICK); e@p` -;<
} hr@KWE`
private static String[] name={ A3&8@/6,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -+|0LXo
}; B/E1nBobC
s\o </ZDo
private static Sort[] impl=new Sort[]{ gbr|0h>
new InsertSort(), S7wZCQe
new BubbleSort(), D.qbzJz
new SelectionSort(), {_3ZKD(\
new ShellSort(), uVDB;6
new QuickSort(), ?Pl>sCFm~
new ImprovedQuickSort(), RNoS7[&
new MergeSort(), -sO EL{
new ImprovedMergeSort(), ]9zc[_ !
new HeapSort() Xa<siA{
}; FlVGi3
I=f1kr pR
public static String toString(int algorithm){ 4OCz:t
return name[algorithm-1]; LLgN%!&
} ,0<|&D
@z dmB~C
public static void sort(int[] data, int algorithm) { z2!NBOv
impl[algorithm-1].sort(data); &[S)zR=?
} 3z&,>CEX
PKdM-R'Z
public static interface Sort { "5XD+qi
public void sort(int[] data); !bH-(K{S6
} `Up<;
u9mMkzgSkP
public static void swap(int[] data, int i, int j) { sF_.9G)S0
int temp = data; "TtK!>!.
data = data[j]; a+\Gz
data[j] = temp; ~<v`&Gm?"
} M%&`&{
} o1zc`Ibd