[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; ~8k`~t!
} (0 t{
int i1=l; rM~Mqpk
int i2=mid+1; UVi9}zr
for(int cur=l;cur<=r;cur++){ :+_H%4+
if(i1==mid+1) Z] cFbl\ma
data[cur]=temp[i2++]; ]OKKR/:
else if(i2>r) J^` pE^S
data[cur]=temp[i1++]; )06. dZq\
else if(temp[i1] data[cur]=temp[i1++]; C;ha2UV0H
else O>rz+8T
data[cur]=temp[i2++]; t9W*N\
} fF/;BSq'
} 8j&1qJx)
U.^%7.
} Q"pZPpl&
'2|mg<Ft
改进后的归并排序: uh)f/)6
96F+I!qC
package org.rut.util.algorithm.support; ^JIs:\g<<
QB*AQ5-
import org.rut.util.algorithm.SortUtil; dXt@x8E
yyVJb3n5:!
/** {2g?+8L$Z
* @author treeroot PL\4\dXB
* @since 2006-2-2 !C' Y 7
* @version 1.0 Gqar5
*/ "$%&C%t
public class ImprovedMergeSort implements SortUtil.Sort { 6 ;\>,
y>UQm|o<W
private static final int THRESHOLD = 10; /WAOpf5
`a7b,d
/* K^AIqL8
* (non-Javadoc) O'~^wu.
* <3k9 y^0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \@6w;tyi
*/ B$97"$#u
public void sort(int[] data) { !qs~j=;y3
int[] temp=new int[data.length]; G"yhu +
mergeSort(data,temp,0,data.length-1); G\f:H%[5[
} r`0oI66B/
BXl Y V"
private void mergeSort(int[] data, int[] temp, int l, int r) { zq^eL=%:
int i, j, k; OOus*ooo2
int mid = (l + r) / 2; !Cm9DzG
if (l == r) +{e2TY
return; NTM.Vj -_h
if ((mid - l) >= THRESHOLD) Xdf;'|HO
mergeSort(data, temp, l, mid); '! ;Xxe5
else 5Obv/C
insertSort(data, l, mid - l + 1); ]'i}}/}u2
if ((r - mid) > THRESHOLD) /LCRi
mergeSort(data, temp, mid + 1, r); HFj@NRE6
else a=^>A1=
insertSort(data, mid + 1, r - mid); h7\16j
8g_GXtn(z
for (i = l; i <= mid; i++) { /Q9iO&Vu
temp = data; @2A&eLwLH
} ~ln96*)M;
for (j = 1; j <= r - mid; j++) { P.t7_v>
temp[r - j + 1] = data[j + mid]; >RmL0d#B
} c$%I^f}'
int a = temp[l]; 6k\8ulHw
int b = temp[r]; 7LW%:0
for (i = l, j = r, k = l; k <= r; k++) { $xj>j
if (a < b) { euh rEjwkH
data[k] = temp[i++]; %i9*2{e#~
a = temp; .TRp74
} else { \G]vTK3
data[k] = temp[j--]; qZ+^ND(I
b = temp[j]; W(*?rA-PP
} Y5Z<uD
} z6Yx )qBE<
} pXxpEv
9d,2d5Y
/** ?m.Ry
* @param data Xu5^ly8p9q
* @param l ?[Qxq34
* @param i %?:eURQ
*/ I9r> 3?
private void insertSort(int[] data, int start, int len) { 7;:Uv=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o>4GtvA*
} ?pF uV`Zm
} }W R?n
} M$GZK'%
} Jp`qE
ulnlRx
堆排序： PEAo'63$
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package org.rut.util.algorithm.support; mOi 8W,2
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import org.rut.util.algorithm.SortUtil; J{5&L &4
GCA?sFwo>
/** |/35c0IM
* @author treeroot y 4jelg
* @since 2006-2-2 SA16Ng
* @version 1.0 k39;7J
*/ GSu&Z/Jo
public class HeapSort implements SortUtil.Sort{ ?wS/KEl=O
q]o^Y
/* (non-Javadoc) |b:91l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wd_KZ}lX
*/ 41`&/9:"_M
public void sort(int[] data) { 4m$Xjj`vE
MaxHeap h=new MaxHeap(); "*aL(R
h.init(data); dD8f`*"*=
for(int i=0;i h.remove(); HBnnIbEtF'
System.arraycopy(h.queue,1,data,0,data.length); )[hQK_e]
} .q7o7J%
;7Y4v`m
private static class MaxHeap{ CR<Nau>
_!*??B6u
void init(int[] data){ n$y)F} .-
this.queue=new int[data.length+1]; 4!KUPgg
for(int i=0;i queue[++size]=data; d$`NApr
fixUp(size); ueazAsk3g
} RZ&T\;m,7
} v81H!c.*
n$T'gX#5
private int size=0; <U() *0
xT$9M"
private int[] queue; ^8yhx-mgb
wtw
public int get() { S>pbplE
return queue[1]; V<;w
} r/vRaOg>X
iv/!c Mb
public void remove() { noa=wy
SortUtil.swap(queue,1,size--); sC.aT(meJ
fixDown(1); ,s,VOyr @F
} ,2YkQ/>
file://fixdown KDX34Fr1
private void fixDown(int k) { \{ui{8+G
int j; nZ 0rxx[V?
while ((j = k << 1) <= size) { Sc zYL?w^
if (j < size %26amp;%26amp; queue[j] j++; l4sFT)}-J
if (queue[k]>queue[j]) file://不用交换 pkL&j<{
break; Yw\PmRL"p
SortUtil.swap(queue,j,k); fc#zhp5bX
k = j; &u'$q
} "NamP\hj
} hkq[xgX
private void fixUp(int k) { ZsPT!l,
while (k > 1) { t:G67^<3
int j = k >> 1; C"P40VQoo
if (queue[j]>queue[k]) ,:QzF"MV
break; O:Fnxp5@
SortUtil.swap(queue,j,k); _8CE|<Cn
k = j; m*MfGj(
} / b_C9'S
} (hn@+hc
6:(*u{
} Iu`xe
S=o1k
} ']hB_4v
Wb/q&o
SortUtil： Ty21-0F
[BpIzhy&}
package org.rut.util.algorithm; L+&eY?A
OXs-gC{b
import org.rut.util.algorithm.support.BubbleSort; c.u$NnDU6
import org.rut.util.algorithm.support.HeapSort; f@%H"8w!
import org.rut.util.algorithm.support.ImprovedMergeSort; L/,W
import org.rut.util.algorithm.support.ImprovedQuickSort; C]tHk)<|42
import org.rut.util.algorithm.support.InsertSort; p<2A4="&
import org.rut.util.algorithm.support.MergeSort; t@TBx=16
import org.rut.util.algorithm.support.QuickSort; '@ym-\,
import org.rut.util.algorithm.support.SelectionSort; w7?&eF(w(
import org.rut.util.algorithm.support.ShellSort; 9wPc03a
B%c):`w8]
/** e.<$G'
* @author treeroot oc>ne]_'
* @since 2006-2-2 v^a. b
* @version 1.0 gm63dE>
*/ Q}a 1P8?S
public class SortUtil { tf?u ;n
public final static int INSERT = 1; \)=X=yn2
public final static int BUBBLE = 2; yk4Huq&2
public final static int SELECTION = 3; QGYO{S
public final static int SHELL = 4; 3:f<cy
public final static int QUICK = 5; uj_ OWre
public final static int IMPROVED_QUICK = 6; DA_[pR
public final static int MERGE = 7; Sxrbhnx
public final static int IMPROVED_MERGE = 8; 4,!S?:7
public final static int HEAP = 9; G H N
meHAa`
public static void sort(int[] data) { ]E1aIt
sort(data, IMPROVED_QUICK); Qo!/]\
} ckXJ9>
private static String[] name={ b{C3r3B8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5JE8/CbH
}; R$<LEwjSw
8,BNs5
private static Sort[] impl=new Sort[]{ _yq"F#,*
new InsertSort(), :h1-i
new BubbleSort(), 0Dj<-n{9
new SelectionSort(), ;IC:]Zu
new ShellSort(), HB+\2jEE
new QuickSort(), +)C?v&N
new ImprovedQuickSort(), <n iq*
new MergeSort(), 5G@z l
new ImprovedMergeSort(), M+X>!Os
new HeapSort() `c^ _5:euX
}; )&"l3*x
K<O1PrC
public static String toString(int algorithm){ :"9 :J
return name[algorithm-1]; OXy>Tlv
} 36154*q
N#-P}\Q9
public static void sort(int[] data, int algorithm) { ;?>xuC$
impl[algorithm-1].sort(data); +1j@n.)ft
} [-)N}rL>
(Yz EsY
public static interface Sort { `p@YV(
public void sort(int[] data); iV!o)WvG,F
} i]:T{2
2f8fA'|O
public static void swap(int[] data, int i, int j) { `B{N3Kxbp
int temp = data; [HJ^'/bB'
data = data[j]; >yC1X|d~t
data[j] = temp; +$KUy>
} #/NZ0IbHk
} VC "66\d&