[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; :FF=a3/"6
} Wwo0%<2y
int i1=l; vN $s|R'@
int i2=mid+1; sOY:e/_F
for(int cur=l;cur<=r;cur++){ bA 2pbjg=
if(i1==mid+1) (FV >m
data[cur]=temp[i2++]; 9c],<;{'
else if(i2>r) BtZyn7a
data[cur]=temp[i1++]; }V>T M{
else if(temp[i1] data[cur]=temp[i1++]; [g,}gyeS(
else \8tsDG(1 '
data[cur]=temp[i2++]; +ZYn? #IQ
} )oZ dj`
} 2wn2.\v M
6!o1XQr=Z
} xw%0>K[
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改进后的归并排序: !>tL6+yj
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package org.rut.util.algorithm.support; 2%1hdA<
}]TxlSp!;
import org.rut.util.algorithm.SortUtil; yZ:qU({KhD
sLFl!jX
/** Efe 7gE'
* @author treeroot E`q_bn
* @since 2006-2-2 9mgIUjz
* @version 1.0 :gT4K-Oj
*/ H]s.=.Ki
public class ImprovedMergeSort implements SortUtil.Sort { a.'*G6~Qgw
QJNFA}*>
private static final int THRESHOLD = 10; qR.Q,(b|
NA*&#X#~
/* C~[,z.FvO
* (non-Javadoc) ^aQ"E9
* Cw%{G'O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $( )>g>%
*/ 0V]s:S
public void sort(int[] data) { =43auFY-P
int[] temp=new int[data.length]; YqG7h,F
mergeSort(data,temp,0,data.length-1); ToQ"Iy?
} Q\)F;:|
_wcNgFx
private void mergeSort(int[] data, int[] temp, int l, int r) { VpUAeWb
int i, j, k; \jA~9
int mid = (l + r) / 2; >7r!~+B"9'
if (l == r) ~ 1pr~
return; u>$t'
if ((mid - l) >= THRESHOLD) WHI`/FM
mergeSort(data, temp, l, mid); 4YHY7J
else zQA`/&=Y
insertSort(data, l, mid - l + 1); HDKbF/
if ((r - mid) > THRESHOLD) r>\bW)e
mergeSort(data, temp, mid + 1, r); BHw, 4#F1;
else eQ"E
insertSort(data, mid + 1, r - mid); D0Cy^_
S$3JMFA
for (i = l; i <= mid; i++) { fh{`Mz,o
temp = data; 1cGmg1U;
} 7KPwQ?SjT
for (j = 1; j <= r - mid; j++) { G`zm@QL
temp[r - j + 1] = data[j + mid]; ccnK#fn v
} j9,P/K$:w
int a = temp[l]; Tr|JYLwF
int b = temp[r]; j4b4!^fV
for (i = l, j = r, k = l; k <= r; k++) { +3`alHUK
if (a < b) { IAEAhqp
data[k] = temp[i++]; jtc~DL
a = temp; fLVAKn
} else { >MK98(F
data[k] = temp[j--]; h$=2p5'-
b = temp[j]; Q^I\cAIB
} L(o15
} @H<q"-J
} rbQR,Nf2x
4~=l}H>&
/** fQ98(+6
* @param data -F92-jBM4
* @param l _FEFx
* @param i rH>)oThA#
*/ 2[CdZ(k]5
private void insertSort(int[] data, int start, int len) { 3~\[7I/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <1%$Vq
} 8X0z~&
} "mNq&$
} v LZoa-w:
} vFsLY
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堆排序： _ J[
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package org.rut.util.algorithm.support; {iLT/i%
H|D.6^
import org.rut.util.algorithm.SortUtil; JCaOK2XT;
ty`DJO=Omj
/** Z/K{A`
* @author treeroot g ci
* @since 2006-2-2 ASfaX:ke
* @version 1.0 v}x&?fU `
*/ D0q":WvE
public class HeapSort implements SortUtil.Sort{ 9,tej
yWya&|D9
/* (non-Javadoc) @K]|K]cby
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `@ FYkH
*/ _y3Xb`0a
public void sort(int[] data) { s0_nLbWwO
MaxHeap h=new MaxHeap(); ^I)N. 5
h.init(data); -]=@s
for(int i=0;i h.remove(); Gbw2E&a
System.arraycopy(h.queue,1,data,0,data.length); YF:L)0H'O
} m_l[MG\
&I406Z f7y
private static class MaxHeap{ "T"h)L<
yA>nli=
void init(int[] data){ h-D}'R
this.queue=new int[data.length+1]; /SrAW`;"
for(int i=0;i queue[++size]=data; F:l%O#V
fixUp(size); w-{c.x
} Ki~1qu:
} @fV9 S"TcM
,u g@f-T
private int size=0; lA-h`rl/
2dzrRH
private int[] queue; ->{KVPHe{
6i*sm.SDw
public int get() { w'3iY,_ufC
return queue[1]; *|E[L^
} f4Rf?w*
ilva,WFa^
public void remove() { gGS=cdlV
SortUtil.swap(queue,1,size--); "x /OIf
fixDown(1); {91nL'-'
} (%:c#;#
file://fixdown v6Vcjm
private void fixDown(int k) { 4 N7^?
int j; n\.Vqe
while ((j = k << 1) <= size) { ++#5
if (j < size %26amp;%26amp; queue[j] j++; w8D"CwS1Rx
if (queue[k]>queue[j]) file://不用交换 Z87|Zl
break; EUgs6[w 4
SortUtil.swap(queue,j,k); <1COZ)
k = j; vFK<J Sk!
} .k \@zQ|Ta
} f0aKlhEC
private void fixUp(int k) { ]}(H0?OQR
while (k > 1) { (NnH:J`
int j = k >> 1; |qZ1|
if (queue[j]>queue[k]) b,%C{mC
break; s&!a
SortUtil.swap(queue,j,k); M+9gL3W
k = j; R+,u^;\
} 6qd\)q6T&x
} !1Cy$}w
Nm>A'bLM
} Q'mM3pq4r
!o[7wKrXb
} Oh\<VvZuN
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SortUtil： _W'-+,
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package org.rut.util.algorithm; HuKc9U'7A
f &wb
import org.rut.util.algorithm.support.BubbleSort; Y,e B|
import org.rut.util.algorithm.support.HeapSort; fn6J*[`
import org.rut.util.algorithm.support.ImprovedMergeSort; A^EE32kbm
import org.rut.util.algorithm.support.ImprovedQuickSort; \K]0JH
import org.rut.util.algorithm.support.InsertSort; 9 ea\vZ
import org.rut.util.algorithm.support.MergeSort; fGw9!
import org.rut.util.algorithm.support.QuickSort; X=8{$:
import org.rut.util.algorithm.support.SelectionSort; TSWM |#u':
import org.rut.util.algorithm.support.ShellSort; o"BoZsMk
u4%Pca9(=
/** c+nq] xOs'
* @author treeroot 3+fp2
* @since 2006-2-2 ^7KH _t8
* @version 1.0 e?lyH
*/ 5K?IDt7A]
public class SortUtil { 'B0{_RaTb
public final static int INSERT = 1; zb<6 Ov
public final static int BUBBLE = 2; #PQB(=299P
public final static int SELECTION = 3; 6}Y#=}
public final static int SHELL = 4; _ T):G6C8
public final static int QUICK = 5; qF-@V25P
public final static int IMPROVED_QUICK = 6; K_ ~"}
public final static int MERGE = 7; 6N S201o
public final static int IMPROVED_MERGE = 8; ~-J]W-n
public final static int HEAP = 9; s;vHPUB\n
o,8TDg
public static void sort(int[] data) { ,1CIBFY
sort(data, IMPROVED_QUICK); iBgx
} ;Q*or2"!
private static String[] name={ Om@C X<(9C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7.#F,Ue_0T
}; zvH8^1yzG
doy`C)xI
private static Sort[] impl=new Sort[]{ wN-d'-z/rd
new InsertSort(), >P@H#=
new BubbleSort(), 1@1U/ss1
new SelectionSort(), c%G{#}^2
new ShellSort(), XkF%.hWo
new QuickSort(), 1\>^m
new ImprovedQuickSort(), 8Sh54H
new MergeSort(), Y+*0~xm4
new ImprovedMergeSort(), 5}]"OXQ
new HeapSort() T<p !5`B1
}; nV:LqF=
$m1z-i;/
public static String toString(int algorithm){ 5r8<7g:>C
return name[algorithm-1]; >kp?vK;'B
} +M$Q =6/
8a'.ZdqC?
public static void sort(int[] data, int algorithm) { 8'nVwb8I
impl[algorithm-1].sort(data); HbAkZP
} sVv xHkt@
cm[&?
public static interface Sort { _EMwm&!
public void sort(int[] data); pDIVZC
} <_tT<5'[$u
`A^"%@j
public static void swap(int[] data, int i, int j) { 5^lxj~ F
int temp = data; G]i/nB
data = data[j]; l6kWQpV
data[j] = temp; \$\ENQ;Nk
} ()+<)hg}2
} 3.W@ }