[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; V> K sbPqR
} k.b->U
int i1=l; DpG|Kl|d
int i2=mid+1; 7;H!F!K]
for(int cur=l;cur<=r;cur++){ \%fl`+`
if(i1==mid+1) EMyMed_
data[cur]=temp[i2++]; "/v{B?~%!
else if(i2>r) u*#j;Xc
data[cur]=temp[i1++]; s>8;At-
else if(temp[i1] data[cur]=temp[i1++]; =?Y%w%2
else CT1)tRN
data[cur]=temp[i2++]; fhCMbq4T
} wm>I;|gA)
} ZuV/!9qU
e RiPC
} /ekeU+j
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改进后的归并排序: qi!Nv$e
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package org.rut.util.algorithm.support; ]F:5-[V#
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import org.rut.util.algorithm.SortUtil; IBYRuaEB
(7 i@@
/** ,'~8{,h5
* @author treeroot }%z {tn
* @since 2006-2-2 px!lJtvgo
* @version 1.0 yHS=8!
*/ 8*O]
public class ImprovedMergeSort implements SortUtil.Sort { 9H$$Og
>0yx!Iao
private static final int THRESHOLD = 10; YcJZG|[
|TCHPKN
/* 4{!7T
* (non-Javadoc) -8;@NAUa
* r q2]u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Rlvb@aXgy
*/ g8<Ja(J
public void sort(int[] data) { .QRa{l_)
int[] temp=new int[data.length]; &%."$rC/0b
mergeSort(data,temp,0,data.length-1); {%Mt-Gm'd
} gJYB)LjH"
;9w:%c1
private void mergeSort(int[] data, int[] temp, int l, int r) { :xdl I`S
int i, j, k; [kfLT::mT
int mid = (l + r) / 2; 5r#0/1ym!
if (l == r) EA@p]+P
return; 7GN>o@t
if ((mid - l) >= THRESHOLD) q'r(#,B<3
mergeSort(data, temp, l, mid); 7A!E~/nSC
else JO\F-xO
insertSort(data, l, mid - l + 1); 9b KK
if ((r - mid) > THRESHOLD) obYXDj2
mergeSort(data, temp, mid + 1, r); 2)O-EAn
else =7&2-'(@
insertSort(data, mid + 1, r - mid); w}*2Hz&Q!
j6zZ! k
for (i = l; i <= mid; i++) { 1:2t4}
temp = data; "AH1)skB:
} )2 E7>SQc~
for (j = 1; j <= r - mid; j++) { ruMS5OqM
temp[r - j + 1] = data[j + mid]; 3@'3U?Hin
} }u"iA^'Ot
int a = temp[l]; <[7 bUB
int b = temp[r]; (of=hzT^?
for (i = l, j = r, k = l; k <= r; k++) { rGPFPsMQ]
if (a < b) { C'4gve 7!
data[k] = temp[i++]; ANuIPF4NxP
a = temp; 1Yj^N"=
} else { +&t`"lRl&
data[k] = temp[j--]; u} y)'eH
b = temp[j]; "u#T0
} |8xu*dVAp4
} ~`7L\'fs
} FT0HU<." 1
&O0@)jIV
/** I)@b#V=
* @param data x.d;7
* @param l |UA)s3Uhxb
* @param i .nXOv]
*/ `tmd'
private void insertSort(int[] data, int start, int len) { Ns^[Hb[b'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /,G-1E
} wWaO"N]
} TF_~)f(`
} $+#Lq.3,
} )`u)#@x
u 3&9R)J1
堆排序： 3vs;ZBM
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package org.rut.util.algorithm.support; Q&p'\6~
Aw]W-fx
import org.rut.util.algorithm.SortUtil; r!DUsE
VK7lm|J+
/** gEFs4; CN
* @author treeroot y _Mte
* @since 2006-2-2 J<[Hwg
* @version 1.0 ?f9@
*/ nq9|cS%-
public class HeapSort implements SortUtil.Sort{ }jF67c->
8Ja't8
/* (non-Javadoc) D;~c`G "f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4d\1W?i-
*/ FQc8j:'
public void sort(int[] data) { u ##.t
MaxHeap h=new MaxHeap(); [QC|Kd^#
h.init(data); %XIPPEHU
for(int i=0;i h.remove(); )ad-p.Hus
System.arraycopy(h.queue,1,data,0,data.length); <F~0D0G
} .i^aYbB$X
UOi[#L@N
private static class MaxHeap{ y81B3`@
zUw=e}?:
void init(int[] data){ e MX?x7
this.queue=new int[data.length+1]; "oZ$/ap\
for(int i=0;i queue[++size]=data; /wF*@/PTH
fixUp(size); )U>JFgpIW
} Ucj eB
} l]pHj4`uv
v/\in'H~
private int size=0; X-xN<S q
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private int[] queue; L.5 /wg
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public int get() { ,!m][
return queue[1]; K'Gv+UC*6
} !N, Oe<
hB]\vA7
public void remove() { znNJ?
SortUtil.swap(queue,1,size--); *G]zN"Y
fixDown(1); I2U/\
} "JHdF&
file://fixdown rD7L==Ld
private void fixDown(int k) { ]z^*1^u^ig
int j; {w,g~ew `
while ((j = k << 1) <= size) { y.pwj~s
if (j < size %26amp;%26amp; queue[j] j++; vMDX
if (queue[k]>queue[j]) file://不用交换 TB!z:n
break; bZf18lvij:
SortUtil.swap(queue,j,k); rKK{*%n
k = j; UK{6Rh ;
} .Xq4QR .
} ;rD M%S@
private void fixUp(int k) { Rds_Cd C
while (k > 1) { 8IX:XDEQ
int j = k >> 1; ncF|wz
if (queue[j]>queue[k]) ^e<"`e
break; Pz=x$aY
SortUtil.swap(queue,j,k); U$-;^=;
k = j; yA74Rxl*6
} D^R=
} G-54D_ 4
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} Kbdjd p
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} HAkEJgV
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SortUtil： V l,V
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package org.rut.util.algorithm; !uoQLiH+
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import org.rut.util.algorithm.support.BubbleSort; $]{20"
import org.rut.util.algorithm.support.HeapSort; &zGf`Zi6*%
import org.rut.util.algorithm.support.ImprovedMergeSort; A,P_|
import org.rut.util.algorithm.support.ImprovedQuickSort; dZMOgZ.!yr
import org.rut.util.algorithm.support.InsertSort; fR:BF47
import org.rut.util.algorithm.support.MergeSort; _ct18nh9
import org.rut.util.algorithm.support.QuickSort; (JgW")M`cY
import org.rut.util.algorithm.support.SelectionSort; |zJxR_)
import org.rut.util.algorithm.support.ShellSort; \wyn
Y,?!"
/** t[L_n m5-
* @author treeroot *5kQ6#l
* @since 2006-2-2 `cz%(Ry,
* @version 1.0 f3g#(1
*/ uQ}0hs
public class SortUtil { `oDs]90
public final static int INSERT = 1; %[l*:05
public final static int BUBBLE = 2; \R m2c8Z2
public final static int SELECTION = 3; ~v /NG
public final static int SHELL = 4; R<5GG|(B
public final static int QUICK = 5; zOkIPv52~
public final static int IMPROVED_QUICK = 6; H[cHF
public final static int MERGE = 7; D8w:c6b
public final static int IMPROVED_MERGE = 8; u$3wdZ2&m
public final static int HEAP = 9; R')D~JJ<8a
O%w"bEr)N
public static void sort(int[] data) { UG]]Vk1d]
sort(data, IMPROVED_QUICK); |=dmxfj@
} .e^AS~4pl
private static String[] name={ (%i)A$i6a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c h_1-
}; li U=&wM>
5|4=uoA<
private static Sort[] impl=new Sort[]{ cz2guUu
new InsertSort(), ,b&-o?.{
new BubbleSort(), 1#G(
new SelectionSort(), w2 L'j9
new ShellSort(), dG}.T_l
new QuickSort(), $>72 g.B
new ImprovedQuickSort(), Oq7R^t`b
new MergeSort(), `u./2]n
new ImprovedMergeSort(), Ca&p;K9FR
new HeapSort() 9PU9BYBG
}; ]m>N!Iu
v7V.,^6+
public static String toString(int algorithm){ |Lq -vs?
return name[algorithm-1]; /~4wM#Yi8
} m]Sv>|
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public static void sort(int[] data, int algorithm) { wR x5` @
impl[algorithm-1].sort(data); 3?}W0dZ$d
} X5(S+;v"^
r]C`#
public static interface Sort { 2u(v hJ F5
public void sort(int[] data); !7m )QNV
} IT.'`!T
E(0(q#n
public static void swap(int[] data, int i, int j) { OG M9e!
int temp = data; eH*u,/
data = data[j]; EB/.M+~a
data[j] = temp; !uC`7a
} }G:5P3f
} +cDz`)N,,