[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; m]bL)]Z
} dVasm<lZ
int i1=l; '~ jy
int i2=mid+1; hVQ7'@
for(int cur=l;cur<=r;cur++){ 2q2p=H>&
if(i1==mid+1) #k"1wSx16
data[cur]=temp[i2++]; }".\ 4B$n
else if(i2>r) tpN]evp|
data[cur]=temp[i1++]; /E=h{|
else if(temp[i1] data[cur]=temp[i1++]; 6lB{Ao?|
else {KF7j63
data[cur]=temp[i2++]; ~,(0h:8
} >l7eoj
} SIKk|I)
\DG( 8l
} Yt\E/*%
trID#DT~
改进后的归并排序: % <8K^|w
^hQ:A4@q
package org.rut.util.algorithm.support; -0=}|$H.
FCsyKdM
import org.rut.util.algorithm.SortUtil; 4v rm&k
#R~">g:w
/** S/#) :,YS
* @author treeroot MAsWds`bpB
* @since 2006-2-2 u.ULS3`C/X
* @version 1.0 k+W
*/ sg'Y4
public class ImprovedMergeSort implements SortUtil.Sort { >=.ch5h3J)
?K= gg<
private static final int THRESHOLD = 10; |NphG|
~EM#Hc,
/* =Bcux8wA#6
* (non-Javadoc) |U;w!0
* gJWlWVeq$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mqrt-VPh
*/ ` 4s#5g
public void sort(int[] data) { >=Rd3dgDG
int[] temp=new int[data.length]; &-EyM*:u!
mergeSort(data,temp,0,data.length-1); B`'}&6jr.
} T>AI0R3
*so6]+)cU
private void mergeSort(int[] data, int[] temp, int l, int r) { ,*9#c*'S
int i, j, k; =RCfibT!C
int mid = (l + r) / 2; ;/6:lL
if (l == r) *~\;&G29Y
return; @LwVmR |{
if ((mid - l) >= THRESHOLD) b;&Yw-\nZ;
mergeSort(data, temp, l, mid); `Gy>tD.#V-
else XnNOj>!
insertSort(data, l, mid - l + 1); 7LyV`6{70
if ((r - mid) > THRESHOLD) cOj +}Hz58
mergeSort(data, temp, mid + 1, r); V^/h;/!^
else 0C4*F
insertSort(data, mid + 1, r - mid); IdN%f]=/
":(Cpf0
for (i = l; i <= mid; i++) { UcKWa>:Fi
temp = data; ^^j|0qshL
} Zp% ""
for (j = 1; j <= r - mid; j++) { zD#+[XI]K
temp[r - j + 1] = data[j + mid]; Q!BkS=H30K
} Q@3ld6y
int a = temp[l]; AOvH&9**
int b = temp[r]; Z.cG`Km*
for (i = l, j = r, k = l; k <= r; k++) { 3!ajvSOI9j
if (a < b) { bOnukbJ
data[k] = temp[i++]; j,gM+4V^
a = temp; 7+A-7ci
} else { .q'FSEkMJ
data[k] = temp[j--]; h:US]ZC^Z
b = temp[j]; K2vPj|
} !'6J;Fb#
} 1*eWvYo1
} A-@-?AR
Hsux>+Q
/** %Pt[3>
* @param data unbcz{&Hb[
* @param l K7d1(.
* @param i HeAc(_=C
*/ `siy!R
private void insertSort(int[] data, int start, int len) { $)i"[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :#"OCXr
} U8.0L
} e-T9HM&%P
} *(XgUJq+
} c+\Gd}IJq
QKL]O*
堆排序： QtO[g
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package org.rut.util.algorithm.support; }!J/ 9WKgU
|~T+f&
import org.rut.util.algorithm.SortUtil; w-q=.RSTn=
aV92.Z_Ku
/** 'E4(!H,k
* @author treeroot \[hrG?A
* @since 2006-2-2 #f jX|b
* @version 1.0 F0o18k_"
*/ Ov{B-zCA
public class HeapSort implements SortUtil.Sort{ J3!k*"P
f|HgLFx
/* (non-Javadoc) 8mQd*GGu1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mSvTnd8
*/ EZu
public void sort(int[] data) { ::Ve,-0
MaxHeap h=new MaxHeap(); n$\6}\k
h.init(data); KcMzZ!d7m
for(int i=0;i h.remove(); Lh5+fk~i~8
System.arraycopy(h.queue,1,data,0,data.length); l<+,(E=
} BfO}4
:Q%yW%St$
private static class MaxHeap{ )="g?E3
gs2&0rnOy\
void init(int[] data){ &`9bGO
this.queue=new int[data.length+1]; C J}4V!;|
for(int i=0;i queue[++size]=data; =*O9)$b
fixUp(size); O'?lW~CD.>
} M3xi 0/.
} )-6[Bw
wE=8jl*
private int size=0; NIcNL(]
3ks|
private int[] queue; rBL_]\$7}
hrtN.4p[
public int get() { I[YfF
return queue[1]; )-7(Hv1
} ?(XX
DyV[+P
public void remove() { (j\UoKLRt
SortUtil.swap(queue,1,size--); TTjjyZ@
fixDown(1); )}k`X<~k
} >?Y3WPB<F
file://fixdown !-Tmu
private void fixDown(int k) { dIe 6:s
int j; WW Kr & )
while ((j = k << 1) <= size) { "Mu$3w
if (j < size %26amp;%26amp; queue[j] j++; .cnw?EI
if (queue[k]>queue[j]) file://不用交换 E"vi+'(v
break; CX@HG)l
SortUtil.swap(queue,j,k); m_Y}>
k = j; ckkM)|kK
} pRfHbPV?
} Wn)A/Z ^r
private void fixUp(int k) { .m % x-i
while (k > 1) { 75cr!+
int j = k >> 1; PfMOc+ q
if (queue[j]>queue[k]) pLFL6\{g
break; @;-Un/'C;7
SortUtil.swap(queue,j,k); b+fy&rk@-
k = j; S}oF7;'Ga
} r_2VExk
} ~8qFM
7.=s1~p
} a~+WL
zK]%qv]
} +vY`?k`
jYssz4)tp
SortUtil： QrRCsy70
(inwKRH
package org.rut.util.algorithm; v6(l#,
gl4 f9Ff
import org.rut.util.algorithm.support.BubbleSort; )e$-B]>7z
import org.rut.util.algorithm.support.HeapSort; `rFGSq$9
import org.rut.util.algorithm.support.ImprovedMergeSort; bqLYF[#T
import org.rut.util.algorithm.support.ImprovedQuickSort; qQ\hUii
import org.rut.util.algorithm.support.InsertSort; }z%/6`7)|
import org.rut.util.algorithm.support.MergeSort; TEy.zzt
import org.rut.util.algorithm.support.QuickSort; hQrsZv:Q
import org.rut.util.algorithm.support.SelectionSort; ]0nC;|]@Lx
import org.rut.util.algorithm.support.ShellSort; H5rNLfw '
+R jD\6bJb
/** h3ZL0Fi*
* @author treeroot G?X,Y\Lp
* @since 2006-2-2 [}Yci:P_ +
* @version 1.0 5Ddyb%
*/ `Y9}5p
public class SortUtil { Y@xeyMzE
public final static int INSERT = 1; )qQg n]
public final static int BUBBLE = 2; 1+[|pXT}
public final static int SELECTION = 3; d3hTz@JY
public final static int SHELL = 4; BwA~*5TFu
public final static int QUICK = 5; <i@jD
public final static int IMPROVED_QUICK = 6; \%Ih 6
public final static int MERGE = 7; [IX!3I[J]
public final static int IMPROVED_MERGE = 8; {ca^yHgGy
public final static int HEAP = 9; o".O#^3H%
9S`b7U=P
public static void sort(int[] data) { x6mq['_
sort(data, IMPROVED_QUICK); |UiykQ
} z+`)|c4-
private static String[] name={ [\y>&"uk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Cl){sP=8W
}; Yl3PZ*#@ Q
`SpS?mWA
private static Sort[] impl=new Sort[]{ 'wHkE/83
new InsertSort(), {}2p1-(
new BubbleSort(), gG?*Fi
new SelectionSort(), G(,~{N||
new ShellSort(), lAt1Mq}?P
new QuickSort(), Ny<G2!W
new ImprovedQuickSort(), H%jIjf
new MergeSort(), 4E94W,1%,Y
new ImprovedMergeSort(), LPgI"6cP
new HeapSort() .EELR]`y7I
}; |xC TX
X64I~*
public static String toString(int algorithm){ Rs`Y'_B
return name[algorithm-1]; [~0q )
} f*@:{2I.v
Z1}zf(JU
public static void sort(int[] data, int algorithm) { ooxzM `
impl[algorithm-1].sort(data); _^A NJ7
} _Pm}]Y:_
F#R\Ot,hv
public static interface Sort { K8we*
public void sort(int[] data); soCHwiE
} =5#Jsn?U
~&jCz4M
public static void swap(int[] data, int i, int j) { fXQRsL8 ]
int temp = data; "C|l3X'
data = data[j]; G+p>39P
data[j] = temp; nWsz0v3'9
} s$G8`$+i1
} OlFn<:V K