[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; .P8m%$'N
} =n.&N
int i1=l; WDnNVE
int i2=mid+1; 9F3aT'3#!
for(int cur=l;cur<=r;cur++){ + $M<ck?Bo
if(i1==mid+1) D8k >f ]
data[cur]=temp[i2++]; aAcQmq TT
else if(i2>r) QfjoHeG7
data[cur]=temp[i1++]; )[99SM
else if(temp[i1] data[cur]=temp[i1++]; #}6~>A
else bz:En'2>F
data[cur]=temp[i2++]; 0F<O \
} ?7cF_Zvve
} }>:x
gi7As$+E
} khb Gyg%
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改进后的归并排序: s.rS06x
e.0vh?{\
package org.rut.util.algorithm.support; eD, 7gC-
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import org.rut.util.algorithm.SortUtil; OwQ 9y<v
+6!.)Ea=
/** zy#E qv
* @author treeroot NDRk%_Eu(
* @since 2006-2-2 dxkXt k
* @version 1.0 V&_5q`L
*/ 2WIbu-"l
public class ImprovedMergeSort implements SortUtil.Sort { x]k^JPX
Vd|5JA}<"
private static final int THRESHOLD = 10; >U9!KB
F#iLMO&Q
/* 8@/]ki`>
* (non-Javadoc) 7BF't!-2F
* /v;g v[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tZ=BK:39\
*/ 0pu])[P]_[
public void sort(int[] data) { i<1w*yu
int[] temp=new int[data.length]; (>>pla^
mergeSort(data,temp,0,data.length-1); [8SW0wsk
} s+^o[R T3
tB[(o%k
private void mergeSort(int[] data, int[] temp, int l, int r) { t_,iV9NrZ
int i, j, k; pp#Kb 2*
int mid = (l + r) / 2; R8\y|p#c
if (l == r) S,3e|-&$
return; ,vW.vq<{q3
if ((mid - l) >= THRESHOLD) akBR"y:~:H
mergeSort(data, temp, l, mid); ,h5.Si>
else $}OU~d1q
insertSort(data, l, mid - l + 1); v<tH 3I+
if ((r - mid) > THRESHOLD) 0} liK
mergeSort(data, temp, mid + 1, r); \p@,+ -gX
else n4k.tq
insertSort(data, mid + 1, r - mid); 9T|7edl
F^T7u?^)
for (i = l; i <= mid; i++) { zG@9-s* L
temp = data; / vje='[!
} \E?1bc{\f
for (j = 1; j <= r - mid; j++) { zmf5!77
temp[r - j + 1] = data[j + mid]; \#2,1W@
} Fdu0?H2TL
int a = temp[l]; 3x'BMAA+
int b = temp[r]; .w[]Q;K_[)
for (i = l, j = r, k = l; k <= r; k++) { r-&4<=C/N
if (a < b) { #N@sJyIN
data[k] = temp[i++]; ldi'@^
a = temp; 7(Y!w8q&^
} else { cKFzn+
data[k] = temp[j--]; R;'Pe>
b = temp[j]; 0=L:8&m
} qK;n>BTe
} ]W-:-.prh
} Z"% =
(#LV*&K%IC
/** e!G I<
* @param data H:y.7
* @param l jD$T
* @param i QjF.U8
*/ )#IiHBF
private void insertSort(int[] data, int start, int len) { O'A''}M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .5KRi6
} hY/SR'8
} "2N3L8?k
} `!>zYcmT
} 'hf-)\Ylf
YeYFPi#
堆排序： Wi hQj
tjuW+5O
package org.rut.util.algorithm.support; .8b4
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import org.rut.util.algorithm.SortUtil; }[LK/@h
+S;8=lzuV
/** !cSD9q*
* @author treeroot 'kH#QO\(e"
* @since 2006-2-2 -)y"EJ(N
* @version 1.0 /3KEX{'@U
*/ 2mU}"gf[
public class HeapSort implements SortUtil.Sort{ y{j>4g$:z
?MpGzCPa
/* (non-Javadoc) 5VG@Q%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Nz!AR$
*/ Bj@&c>
public void sort(int[] data) { D|=QsWZI
MaxHeap h=new MaxHeap(); i3e|j(Gs4
h.init(data); 5)T{iPU%X
for(int i=0;i h.remove(); "H G:by
System.arraycopy(h.queue,1,data,0,data.length); zEO 9TuBO
} 0HNe44oI+D
/f#rN_4
private static class MaxHeap{ >@oO7<WB
?|s[/zPS=
void init(int[] data){ @F3d9t-
this.queue=new int[data.length+1]; ?nt6vqaV
for(int i=0;i queue[++size]=data; C{2UPG4x
fixUp(size); %+pXzw`B
} OcSLRN?t
} "4"L"lJ
Q|xPm:
private int size=0; rtzxMCSEU
b%)a5H(
private int[] queue; G 8NSBaZe
.pdgRjlSn
public int get() { _@^msyoq
return queue[1]; P AKh v.7
} <?Lj!JGX
x1Si&0T0P<
public void remove() { F[?t"d
SortUtil.swap(queue,1,size--); D2?7=5DgS
fixDown(1); a(J~:wgd
} A$5!]+
file://fixdown LXK+WB/s
private void fixDown(int k) { 99ZQlX
int j; N86Hn]#
while ((j = k << 1) <= size) { W0nRUAo[
if (j < size %26amp;%26amp; queue[j] j++; u;Z~Px4]v
if (queue[k]>queue[j]) file://不用交换 54'z"S:W
break; FvvF4 ,e5
SortUtil.swap(queue,j,k); YE^|G,]
k = j; Z#Zk)
} 1= <Qnmw
} R_Hdi~ k
private void fixUp(int k) { 4)"jg[
while (k > 1) { XS1>ti|<
int j = k >> 1; ^c!Hur6)
if (queue[j]>queue[k]) )P,jpE8
break; 0<P -`|X
SortUtil.swap(queue,j,k); g!K(xhEO
k = j; QiZThAe
} \ (X~Z
} r?Z8_5Y
2?m'Dy'JE
} WJg?R^
{j^}"8GB
} s*f.` A*)
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SortUtil： m+UdT854
A]9JbNV
package org.rut.util.algorithm; .7FI%
hl:eF:'hm
import org.rut.util.algorithm.support.BubbleSort; x,dv~QU
import org.rut.util.algorithm.support.HeapSort; aC:l;
import org.rut.util.algorithm.support.ImprovedMergeSort; <3}l8Z
import org.rut.util.algorithm.support.ImprovedQuickSort; <T[N.mB
import org.rut.util.algorithm.support.InsertSort; F21[r!3
import org.rut.util.algorithm.support.MergeSort; 5KR|pFq
import org.rut.util.algorithm.support.QuickSort; W<VHv"?V
import org.rut.util.algorithm.support.SelectionSort; A.O~'')X
import org.rut.util.algorithm.support.ShellSort; %b;+/s2W
]LTc)[5Zj
/** ai4^NJn
* @author treeroot fJ2{w[ne
* @since 2006-2-2 SZ{cno1`
* @version 1.0 a7\L-T+
*/ hhAC@EGG
public class SortUtil { b]BA,D4
public final static int INSERT = 1; Z!reX6
public final static int BUBBLE = 2; _kN%6~+U
public final static int SELECTION = 3; :, [!8QP
public final static int SHELL = 4; o$VH,2 QF
public final static int QUICK = 5; ~iZF~PQ1_
public final static int IMPROVED_QUICK = 6; F |81i$R
public final static int MERGE = 7; B5HdC%8/}
public final static int IMPROVED_MERGE = 8; RCYbRR4y
public final static int HEAP = 9; -/c1qLdQ
tq[",&K
public static void sort(int[] data) { hX%v`8
sort(data, IMPROVED_QUICK); YO$b#
} Wmxw!
private static String[] name={ Z4ov
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ws>Iyw.u
}; [KI`e
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private static Sort[] impl=new Sort[]{ h_G|.7!
new InsertSort(), 1r& ?J.z25
new BubbleSort(), vC<kpf!
new SelectionSort(), -^Km}9g
new ShellSort(), AJlIA[Kt:
new QuickSort(), _8pkejg
new ImprovedQuickSort(), n3g WMC
new MergeSort(), G!LNP&~
new ImprovedMergeSort(), x ETVtq
new HeapSort() I+?$4SC
}; zGd*Q5l
O\F^@;]F6
public static String toString(int algorithm){ 5uJP)S?
return name[algorithm-1]; [-Tt11
} f9XO9N,hE:
r]EZ)qp^@
public static void sort(int[] data, int algorithm) { M(WOxZ8
impl[algorithm-1].sort(data); +6)kX4
} C\2>7
UH,4b`b
public static interface Sort { qMdtJ(gq
public void sort(int[] data); ID).*@(I"
} WlRZ|.
aco}pXz
public static void swap(int[] data, int i, int j) { ;7^j-6
int temp = data; ~v(M6dz~vk
data = data[j]; grfdvN
data[j] = temp; q'AnI$!
} F;&fx(
} ?)o4 Kt'h