[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; j=kz^o~mH
} k*u4N
int i1=l; $?*XPzZ
int i2=mid+1; =WEWs4V5A
for(int cur=l;cur<=r;cur++){ ,>3b|-C-
if(i1==mid+1) yc7"tptfF
data[cur]=temp[i2++]; KN<KZM
else if(i2>r) pY$DOr-r`
data[cur]=temp[i1++]; Ue&I]/?;$
else if(temp[i1] data[cur]=temp[i1++]; [M#I Nm}
else n2N:rP
data[cur]=temp[i2++]; SYYg 2I
} dF+R q|n{
} rCsH 0:l8P
h[& \OD,P
} Hdda/?{b
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改进后的归并排序: ,|^ lqY
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package org.rut.util.algorithm.support; 4"et4Y7
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import org.rut.util.algorithm.SortUtil; oTb4T=
t@cImmh\T
/** *?R<gWCF
* @author treeroot ia*Bcx_RW+
* @since 2006-2-2 5 8n(fdE
* @version 1.0 4mci@1K#^
*/ W@WKdaJ
public class ImprovedMergeSort implements SortUtil.Sort { fctVJ{?
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private static final int THRESHOLD = 10; D {N,7kT
AkX8v66:
/* pP*`b<|
* (non-Javadoc) %&&;06GU}
* v]U0@#/p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r!)jxIL\
*/ ^2eH0O!
public void sort(int[] data) { OcZ8:`=%
int[] temp=new int[data.length]; E-b3#\^:
mergeSort(data,temp,0,data.length-1); e"]DIy4s
} e)kVS}e?
D`@*udn=
private void mergeSort(int[] data, int[] temp, int l, int r) { o0FVVSl
int i, j, k; 9RnXp&w
int mid = (l + r) / 2; \Z/#s;c,4
if (l == r) `cpUl*Y=
return; `t Zw(Z=h
if ((mid - l) >= THRESHOLD) zf?U q
mergeSort(data, temp, l, mid); wKj0vMW
else $LJCup,1"
insertSort(data, l, mid - l + 1); 7gP8K`w?[
if ((r - mid) > THRESHOLD) xYD.j~
mergeSort(data, temp, mid + 1, r); #]e](j>]
else H<C+rAIb
insertSort(data, mid + 1, r - mid); '/GZ,~q
8\9s,W:5
for (i = l; i <= mid; i++) { Nh+ZSV4WJ:
temp = data; zH1:kko
} I;3Uzv
for (j = 1; j <= r - mid; j++) { O>Ao#_*hOb
temp[r - j + 1] = data[j + mid]; ?%wM8?
} WG(%Pkowv
int a = temp[l]; Q??nw^8Hi
int b = temp[r]; }@NT#hD
for (i = l, j = r, k = l; k <= r; k++) { 707-iLkt.1
if (a < b) { ~4C:2
data[k] = temp[i++]; [cvtF(,
a = temp; WJ m:?,
} else { 7 J+cs^2
data[k] = temp[j--]; "%fvA;
b = temp[j]; 8jm\/?k|
} 7) e#b
} 5Q.z#]Lg
} mZb[Fi
}5a$Ka-
/** )1 =|\
* @param data =VM4Q+'K
* @param l /%5X:*:H
* @param i BHEZ<K[U
*/ /8tF7Mmr
private void insertSort(int[] data, int start, int len) { aIW W[xZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *w_f-YoXp
} .~yz1^ c
} OX*5 yT{
} {5N!udLDr5
} h!UB#-
[t}$W*hY
堆排序： M~#% [?iU
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package org.rut.util.algorithm.support; >djTJ>dl_u
a>/cVu'kz
import org.rut.util.algorithm.SortUtil; t_Rpeav
LAfv1
/** KD)+&69
* @author treeroot X__>r ?oJ
* @since 2006-2-2 -L)b;0%
* @version 1.0 Z2wgfP`
*/ f0,,<ib.w
public class HeapSort implements SortUtil.Sort{ dJYQdo^X
~Q/G_^U:
/* (non-Javadoc) T($6L7 j9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -yH8bm'0"
*/ e-.s63hm
public void sort(int[] data) { `OWw<6`k
MaxHeap h=new MaxHeap(); &@anv.D
h.init(data); D%=FCmL5@=
for(int i=0;i h.remove(); />E:}1}{
System.arraycopy(h.queue,1,data,0,data.length); eX9Hwq4X44
} BvA09lK
t)hAD_sf
private static class MaxHeap{ aur4Ky> :
[~_()i=Y
void init(int[] data){ <R>%DD=v^
this.queue=new int[data.length+1]; /o)o7$6Q
for(int i=0;i queue[++size]=data; bRzw.(k0`r
fixUp(size); hR1n@/nh
} E0Neo _7
} b\^q9fy
0cxk)l%
private int size=0; |#6))Dh
]sf1+3
private int[] queue; h72#AN
MPg"n-g*
public int get() { ozr82
return queue[1]; D^~G(m;-
} It .`
(,5,}
public void remove() { }&{z-/;H
SortUtil.swap(queue,1,size--); +g6t)Gl
fixDown(1); [`eqma
} _Ka6! 9
file://fixdown =gjq@N]lAW
private void fixDown(int k) { !PIpvx{aX
int j; ;=?f0z<
while ((j = k << 1) <= size) { (pFPuV
if (j < size %26amp;%26amp; queue[j] j++; 10 D6fkjf
if (queue[k]>queue[j]) file://不用交换 V?*\ISB`}
break; And|T 6u
SortUtil.swap(queue,j,k); -!kfwJg8N(
k = j; q|23l1PI
} =(^-s Jk
} )O~V3a
private void fixUp(int k) { C25r3bj
while (k > 1) { m<DiYxK
int j = k >> 1; _ `RCY^t
if (queue[j]>queue[k]) Snav)Hb'
break; mimJ_=]DC
SortUtil.swap(queue,j,k); \ M_}V[1+
k = j; EM.7,;|N
} w!=Fi
} >pVrY; P[
jv C.T]<B
} FccT@,.F
nlfu y[oX
} k[6xuyY]
z DP
SortUtil： soH M5<U
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package org.rut.util.algorithm; 7HpfHqJ7
)<kId4E
import org.rut.util.algorithm.support.BubbleSort; 4a&*?=GG
import org.rut.util.algorithm.support.HeapSort; *7ggw[~
import org.rut.util.algorithm.support.ImprovedMergeSort; ]7d~,<3R
import org.rut.util.algorithm.support.ImprovedQuickSort; 0!:1o61
import org.rut.util.algorithm.support.InsertSort; qOusO6
import org.rut.util.algorithm.support.MergeSort; KVvzVQ1
import org.rut.util.algorithm.support.QuickSort; $8{|25 *E
import org.rut.util.algorithm.support.SelectionSort; _m *8f\
import org.rut.util.algorithm.support.ShellSort; 7.r}98V
D};zPf@!p
/** wO&edZ]zb^
* @author treeroot X/ \5j
* @since 2006-2-2 d"1DE
* @version 1.0 oPX `/X#
*/ Tk^J#};N
public class SortUtil { ~4YLPMGKl
public final static int INSERT = 1; HywT
public final static int BUBBLE = 2; `ehZ(H}
public final static int SELECTION = 3; 1;\A./FVv
public final static int SHELL = 4; H9x,C/r,
public final static int QUICK = 5; PjH[8:,
public final static int IMPROVED_QUICK = 6; gbf-3KSp^
public final static int MERGE = 7; >d`XR"_e
public final static int IMPROVED_MERGE = 8; $Vi[195]2
public final static int HEAP = 9; )wmG&"qsP
^lUV^%f
public static void sort(int[] data) { \k#|[d5W
sort(data, IMPROVED_QUICK); "k8Yc<`u
} kHO2&"6
private static String[] name={ .%.kEJh`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" GAZTCkB"
}; +s*OZ6i [
+>em !~3
private static Sort[] impl=new Sort[]{ cB;:}Q08#
new InsertSort(), B@:c8}2.
new BubbleSort(), .`iG}j)\
new SelectionSort(), V)$y
new ShellSort(), h6*&1r
new QuickSort(), 7j>NUx=j3
new ImprovedQuickSort(), z/JoUje
new MergeSort(), YF+hN\
new ImprovedMergeSort(), sHqs)@D
new HeapSort() |Ef\B]Ns
}; Bs@!S?
-8L22t
public static String toString(int algorithm){ fn%Gu s~
return name[algorithm-1]; DcNQ2Zz?%
} Q}KNtNCpx
^w0V{qF{
public static void sort(int[] data, int algorithm) { D 8nt%vy
impl[algorithm-1].sort(data); Xq3n7d.
} &GF|Rr8NXs
z7[TgL7
public static interface Sort { Q9(J$_:
public void sort(int[] data); ]s*Fs]1+H
} HF9\SVR B
}Yi)r*LI3
public static void swap(int[] data, int i, int j) { 6GxQ<
int temp = data; AN!MFsk
data = data[j]; L<kIzB !
data[j] = temp; s6#@S4^=\
} ]!u12^A{
} 59?@55