[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; e4z1`YLsG
} (Gw,2-A
int i1=l; P7x =
int i2=mid+1; eU N"w,@y
for(int cur=l;cur<=r;cur++){ o)[2@fRC(
if(i1==mid+1) {M?vBgR\B
data[cur]=temp[i2++]; $8'O
else if(i2>r) h'$9C
data[cur]=temp[i1++]; "/nNM{^
else if(temp[i1] data[cur]=temp[i1++]; n9\]S7]52
else S>0nx ^P
data[cur]=temp[i2++]; @j4U^"_QB
} RJON90,J
} bug Ot7
D Kw*~0
} !xKJE:4/,m
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改进后的归并排序: ?^EXTU85`"
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package org.rut.util.algorithm.support; *\o/q[
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import org.rut.util.algorithm.SortUtil; [M%9_CfZOy
nxJee=qH
/** ee/&/Gt
* @author treeroot bLnrbid
* @since 2006-2-2 zP;cTF(C
* @version 1.0 hG_?8:W8HT
*/ Na\WZSu'"
public class ImprovedMergeSort implements SortUtil.Sort { "aFhkPdWn
@y/wEBb
private static final int THRESHOLD = 10; 5&f{1M6l>
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/* %,iIpYx
* (non-Javadoc) :Yj)CGl$
* KHDZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i#%a-I:M
*/ tdF9NFMD
public void sort(int[] data) { U5]pi+r
int[] temp=new int[data.length]; gBf4's
mergeSort(data,temp,0,data.length-1); 4TwQO$C
} $j5,%\4<
j2Pn<0U
private void mergeSort(int[] data, int[] temp, int l, int r) { oQ7]=|
int i, j, k; %G@5!|J
int mid = (l + r) / 2; b`_w])Y@
if (l == r) 6UE(f@
return; s:AkkkF
if ((mid - l) >= THRESHOLD) (#oycj^<
mergeSort(data, temp, l, mid); ?QA\G6i4
else 8:.nEo'
insertSort(data, l, mid - l + 1); vLO&Lpv
if ((r - mid) > THRESHOLD) CWO=0_>2
mergeSort(data, temp, mid + 1, r); ==cd>03()
else hGf-q?7
insertSort(data, mid + 1, r - mid); `E\imL
b59{)u4F
for (i = l; i <= mid; i++) { Y&2aO1
temp = data; ~^vC,]hU
} G5tday~3
for (j = 1; j <= r - mid; j++) { 5=KF!?
temp[r - j + 1] = data[j + mid]; AA:no=
} YGsS4ia*4i
int a = temp[l]; `Vq`z]}
int b = temp[r]; +3,|"g::
for (i = l, j = r, k = l; k <= r; k++) { Z7jX9e"L
if (a < b) { {?{U,&
data[k] = temp[i++]; /dDzZ%/@
a = temp; y@wF_WX2
} else { hFvi5I-b
data[k] = temp[j--]; ,kgF2K!
b = temp[j]; cywg[
} 1'G8o=~
} &!35/:~uD
} s T3p>8n
NfE.N&vI_c
/** [$ :
* @param data 4%*hGh=
* @param l 2:$ k
* @param i TD04/ ISHT
*/ K%}}fw2RMN
private void insertSort(int[] data, int start, int len) { Q1>zg,r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %d: A`7x
} _eLVBG35z
} R#4^s
} he)ulB
} ~_!ts{[E
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堆排序： r9ke,7?
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package org.rut.util.algorithm.support; 4Y tk!oS`
dmR3Y.\jd
import org.rut.util.algorithm.SortUtil; t ,qul4y}
b"8FlZ$
/** lv:U%+A
* @author treeroot 6CNS%\A
* @since 2006-2-2 =8{*@>CX
* @version 1.0 g=A$<k
*/ b?kPN:U#N/
public class HeapSort implements SortUtil.Sort{ *kaJ*Ti-/
Sb^ b)q"
/* (non-Javadoc) L2Ux9_S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $cK^23H/Fj
*/ v`)m">e*w
public void sort(int[] data) { N4[E~-
MaxHeap h=new MaxHeap(); =aow d4t
h.init(data); 5_G'68;OV
for(int i=0;i h.remove(); =|y|P80w
System.arraycopy(h.queue,1,data,0,data.length); fkW(Dt,
} Mn"/#tXL-
*d l"wH&
private static class MaxHeap{ 3t
N^B@3QF
void init(int[] data){ ^`&HWp
this.queue=new int[data.length+1]; ",Wf uz
for(int i=0;i queue[++size]=data; R^9"N?Q7;`
fixUp(size); w67xl
} md6*c./Z
} Tcs3>lJ}
N&B>#:
private int size=0; +-HE'4mo
Za\RM[Z!I
private int[] queue; ~'f8L#[M
Ck(.N
public int get() { mcMb*?]
return queue[1]; J%4HNW*p
} 4GTrI@}3
a97Csxf;7
public void remove() { !?r/ 4
SortUtil.swap(queue,1,size--); 7Jc<.Z"/Gd
fixDown(1); -eYL*Pa
} Fhi5LhWe+.
file://fixdown x=3I)}J(kn
private void fixDown(int k) { 8g5.7{ky
int j; {Vl"m2
while ((j = k << 1) <= size) { 7+S44)w}~
if (j < size %26amp;%26amp; queue[j] j++; ;5RIwD
if (queue[k]>queue[j]) file://不用交换 q+J0}y{#8)
break; aZ/yCS7
SortUtil.swap(queue,j,k); 2e\Kw+(>{
k = j; gDc]^K4>
} #x|VfN5f
} 1?]J;9p
private void fixUp(int k) { |bvGYsn_#=
while (k > 1) { }u7D9_KU
int j = k >> 1; -~]^5aa5n
if (queue[j]>queue[k]) DzmqR0)
break; @_uFX!;
SortUtil.swap(queue,j,k); "{6KZ!+0
k = j; "D!Dr1
} xx}'l:}2]
} 4= $!_,.
~{Ua92zV9
} !z.^(Tj
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} }(rzH}X@
6%z`)d
SortUtil： '&{(:,!B
kz|[*%10
package org.rut.util.algorithm; aEZJNWv
b__n~\q_
import org.rut.util.algorithm.support.BubbleSort; I$F\(]"@
import org.rut.util.algorithm.support.HeapSort; s!=!A
import org.rut.util.algorithm.support.ImprovedMergeSort; @]yQJuXA&Z
import org.rut.util.algorithm.support.ImprovedQuickSort; 1(D1}fcul
import org.rut.util.algorithm.support.InsertSort; 5Wj5IS/
import org.rut.util.algorithm.support.MergeSort; 7~ILRj5Nq
import org.rut.util.algorithm.support.QuickSort; Q,O]x#
import org.rut.util.algorithm.support.SelectionSort; d OzO/w&
import org.rut.util.algorithm.support.ShellSort; J~:kuf21
:hi$}xHa
/** -1#e^9Ve\
* @author treeroot d!FONi
* @since 2006-2-2 rHR5,N:
* @version 1.0 /}[zA@
*/ 6pSRum
public class SortUtil { WJP`0f3
public final static int INSERT = 1; yFa&GxSq
public final static int BUBBLE = 2; Y&~5k;>'_
public final static int SELECTION = 3; s-y'<(ll
public final static int SHELL = 4; <`^>bv9
public final static int QUICK = 5; ]q@rGD85K
public final static int IMPROVED_QUICK = 6; vBV"i9n
public final static int MERGE = 7; N7%=K9
public final static int IMPROVED_MERGE = 8; (d1V1t2r6
public final static int HEAP = 9; ok8JnQC
cC*zj\O
public static void sort(int[] data) { HP1X\h!Ke
sort(data, IMPROVED_QUICK); )GQD*b
} ,|=iv
private static String[] name={ tVK?VNW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <PH3gyC
}; 2-/YYe;C
(2&K(1.Y
private static Sort[] impl=new Sort[]{ C _k_D
new InsertSort(), bt.K<Y0
new BubbleSort(), +/1P^U /
new SelectionSort(), KHiYV
new ShellSort(), .T[!!z#^
new QuickSort(), V_ avaE
new ImprovedQuickSort(), 4c9-[KKCV
new MergeSort(), ?3e!A9x
new ImprovedMergeSort(), [7CH(o1a&
new HeapSort() gb^UFD L
}; k,o=1I
`RL(N4H
public static String toString(int algorithm){ INeWi=1
return name[algorithm-1]; RJ7/I/yD|
} xf{C'uF/
A@lhm`Aa
public static void sort(int[] data, int algorithm) { 1yY'hb,0
impl[algorithm-1].sort(data); &)/H?S;yN
} %K/G+
S(YHwH":
public static interface Sort { V9);kD
public void sort(int[] data); (&a3v
} vf/$`IJ
}r\SP3
public static void swap(int[] data, int i, int j) { 8EVF<@{]
int temp = data; /(z0I.yE
data = data[j]; '44nk(hM69
data[j] = temp; 3IRRFIiO
} t8wz'[z
} b{ubp