[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; b~b(Ed{r
} <5(8LMF
int i1=l; 0{Kl5>Z9M
int i2=mid+1; ,\DB8v6l\A
for(int cur=l;cur<=r;cur++){ 9hT^Y,c0
if(i1==mid+1) |b/J$.R
data[cur]=temp[i2++]; IR%a+;Xs
else if(i2>r) 9kP!O_
data[cur]=temp[i1++]; vmOXB#7W
else if(temp[i1] data[cur]=temp[i1++]; 9VN@M
else <E BgHD)
data[cur]=temp[i2++]; +c\s%Gzrh
} (`18W1f5W
} c`X'Q)c&K
$YSD%/c
} fwAN9zs
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改进后的归并排序: &u"*vG (U[
A0rdQmrOL
package org.rut.util.algorithm.support; Ytx+7OLe
VJCh5t*
import org.rut.util.algorithm.SortUtil; BPrA*u}T
6EK+]0
/** 6DJ,/J2F
* @author treeroot %TG$5')0
* @since 2006-2-2 q'hV 'U
* @version 1.0 <'~8mV1
*/ >Fld7;L?<
public class ImprovedMergeSort implements SortUtil.Sort { Mn~A;=%qF
!nj%n
private static final int THRESHOLD = 10; 0v0Y( Mo@
vEzzdDwi6
/* jD^L<
* (non-Javadoc) ,0&lag
* XU9=@y+|v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \Zf&&7v
*/ hCT%1R}rKr
public void sort(int[] data) { #4//2N
int[] temp=new int[data.length]; -t6d`p;dR
mergeSort(data,temp,0,data.length-1); /"CKVQ
} 4Ro(r sO
t48(GKF
private void mergeSort(int[] data, int[] temp, int l, int r) { HB`pK'gz
int i, j, k; v[a#>!;s
int mid = (l + r) / 2; 2J4|7UwJ
if (l == r) 6eDIS|/
return; GYO\l.%V5y
if ((mid - l) >= THRESHOLD) N0vd>b
mergeSort(data, temp, l, mid); HqXo;`Yy}
else E;4Ns
insertSort(data, l, mid - l + 1); f6L_uk`{
if ((r - mid) > THRESHOLD) zW0AB8l
mergeSort(data, temp, mid + 1, r); &vMH AZd
else :LBe{Jbw
insertSort(data, mid + 1, r - mid); q<yH!
lIFt/
for (i = l; i <= mid; i++) { &YT7>z,
temp = data; [V)sCAW
} =|U2 }U;
for (j = 1; j <= r - mid; j++) { 4G>|It
temp[r - j + 1] = data[j + mid]; 3(5RUI-
} 2/7=@>|
int a = temp[l]; %o"Rcw|
int b = temp[r]; 9uS7G*
for (i = l, j = r, k = l; k <= r; k++) { +rT(
if (a < b) { }qD.Ek
data[k] = temp[i++]; Tc88U8Gc
a = temp; _).'SU)>
} else { W;N/Y3Lb
data[k] = temp[j--]; Q?a"uei[
b = temp[j]; 3,vH:L4
} =` i 7?
} 'o7PIhD"
} phc1AN=[E
f0D Ch]
/** @&Nvb.5nT
* @param data %C3cdy_c
* @param l xapkhIW2\
* @param i ]F@md(J
*/ }a9C/t3
private void insertSort(int[] data, int start, int len) { \OU+Kl<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); YjX=@
} 42wcpSp
} MtYP3:
} 5pok%g
} *[SsvlFt
H*\[:tPa
堆排序： .d"+M{I
tH'VV-!MZ
package org.rut.util.algorithm.support; 13QCM0#
^z^>]Qd
import org.rut.util.algorithm.SortUtil; r/4]b]n
|?| u-y
/** s{k\1P(G}
* @author treeroot 20moX7L
* @since 2006-2-2 xF/DYXC{8
* @version 1.0 *SY4lqN
*/ 'QS"4EvdD
public class HeapSort implements SortUtil.Sort{ ltrSTH,kL
!X8UP{J)L
/* (non-Javadoc) T8441qo{>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <dN=d3S
*/ iCK$ o_`?
public void sort(int[] data) { x5|v# -F ^
MaxHeap h=new MaxHeap(); ;Bb5KD
h.init(data); ^97ZH)Ww
for(int i=0;i h.remove(); _#4,&bh8
System.arraycopy(h.queue,1,data,0,data.length); ,\M_q">npc
} :7ngVc
# 0!IUSa
private static class MaxHeap{ V[I<9xaE
-$)Et|
void init(int[] data){ /K!,^Xn
this.queue=new int[data.length+1]; }}1/Ede{5
for(int i=0;i queue[++size]=data; =|!~0O
fixUp(size); ^<VE5OM
} `az`?`i7
} cA%U
Zd(d]M_x
private int size=0; ^d9raYE`'
gkz#kiGF
private int[] queue; :(b3)K
8e@JvAaa$
public int get() { 7S2F^,w
return queue[1]; |+:ZO5FaO
} D%idlL2%J
>>bYg
public void remove() { 5tU"|10m3
SortUtil.swap(queue,1,size--); 5)zB/Ta<
fixDown(1); H ZLOn
} (d;(FBk='
file://fixdown iy82QNe
private void fixDown(int k) { 3=l-jGJk
int j; sOxdq"E
while ((j = k << 1) <= size) { t60/f&A#7H
if (j < size %26amp;%26amp; queue[j] j++; +7/*y}.U
if (queue[k]>queue[j]) file://不用交换 `Y\/US70{c
break; 9`v:$(I
SortUtil.swap(queue,j,k); 9(F?|bfk
k = j; LQ@|M.$A
} IJc#)J.2A
} qX'a&~s)n
private void fixUp(int k) { :UcS$M1LE
while (k > 1) { OZ;E&IL
int j = k >> 1; Zax]i,Bx
if (queue[j]>queue[k]) -b)zira
break; ,:(leWeA9
SortUtil.swap(queue,j,k); *wB-lg7%
k = j; ,A!e"=HF
} b<(UmRxx3
} %B&?D@
ePpK+E[0Z
} ~9 WJrRWB
,Q#tA|:8j
} '<=MhNh\
/C"s_:m;3
SortUtil： fF>qU-
YaZt+WA
package org.rut.util.algorithm; |~uzQU7
PBs<8xBx^
import org.rut.util.algorithm.support.BubbleSort; g**%J Xo
import org.rut.util.algorithm.support.HeapSort; m=.7f9
import org.rut.util.algorithm.support.ImprovedMergeSort; OEE{JVeI
import org.rut.util.algorithm.support.ImprovedQuickSort; =P;;&j3Z
import org.rut.util.algorithm.support.InsertSort; '>|*j"jv-
import org.rut.util.algorithm.support.MergeSort; Kc[u} .U
import org.rut.util.algorithm.support.QuickSort; ).!14Gjo
import org.rut.util.algorithm.support.SelectionSort; @ KPv&UB
import org.rut.util.algorithm.support.ShellSort; e~s7ggg2k
?SOF n
/** m=iov2K>
* @author treeroot P>T*:!s;
* @since 2006-2-2 h!N&gZ[0
* @version 1.0 y]YS2^
*/ wt.{Fqm
public class SortUtil { M}oj!xGB
public final static int INSERT = 1; c^Gwri4
public final static int BUBBLE = 2; N"x\YHp
public final static int SELECTION = 3; ms\/=96F
public final static int SHELL = 4; #oroY.o
public final static int QUICK = 5; !bV(VRbu
public final static int IMPROVED_QUICK = 6; #8f"}>U9.,
public final static int MERGE = 7; .-u k
public final static int IMPROVED_MERGE = 8; cevV<Wy+
public final static int HEAP = 9; :IT U0%;!+
DET!br'z5
public static void sort(int[] data) { VtzmY
sort(data, IMPROVED_QUICK); !+45=d 5
} YNJpQAuSn)
private static String[] name={ F}B/-".^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9Oo*8wvGG
}; ;Jbc'V'fm
k *;{n8o?)
private static Sort[] impl=new Sort[]{ Sp~Gv>uMK
new InsertSort(), ~2A$R'xb
new BubbleSort(), V0'p1J tD
new SelectionSort(), .FbZVYc]
new ShellSort(), 8X ?GY8W:
new QuickSort(), KYRm Ui#
new ImprovedQuickSort(), (_&V9vat=
new MergeSort(), (-'0g@0UA
new ImprovedMergeSort(), UGC|C F2K
new HeapSort() N]s7/s
}; vzyI::f?
R3{*v =ov
public static String toString(int algorithm){ %AEK[W+0
return name[algorithm-1]; KB,~u*~!
} @Uj_+c q
M*~v'L_sI
public static void sort(int[] data, int algorithm) { H8<7#
impl[algorithm-1].sort(data); :&1=8^BY
} nA_ zP4
A D}}>v
public static interface Sort { QK3j_'F=E
public void sort(int[] data); ]~ #+b>
} F'UguC">
Dmm r]~
public static void swap(int[] data, int i, int j) { fs3-rXoB
int temp = data; cdJ`Gk
data = data[j]; (@WDvgi(
data[j] = temp; cJHABdK-
} }*B qi7E>
} KXx@ {cv