[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; *?MGMhE
} av~5l4YL
int i1=l; R LD`O9#j
int i2=mid+1; Z(Jt~a3o
for(int cur=l;cur<=r;cur++){ n?V+dC=F}
if(i1==mid+1) D_Bb?o5
data[cur]=temp[i2++]; g:EVhuK
else if(i2>r) T1H"\+
data[cur]=temp[i1++]; OrK&RC
else if(temp[i1] data[cur]=temp[i1++]; )m. 4i=X
else 7B?c{
data[cur]=temp[i2++]; u(G*\<z-
} V*~Zs'L'E
} mkR2i>
8U_{|]M
} W6Y@U$P#G
M9f35 :
改进后的归并排序: Dwzg/F(
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package org.rut.util.algorithm.support; I|Gp$uq _
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import org.rut.util.algorithm.SortUtil; ^b %0B
b".L_Ma1*
/** b5^OQH{v
* @author treeroot yDGVrc'
* @since 2006-2-2 GAAm0;
* @version 1.0 )rixMl &[
*/ edPUG N
public class ImprovedMergeSort implements SortUtil.Sort { IY*EA4>
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private static final int THRESHOLD = 10; M>/Zbnq
fj&i63?e
/* >]c*'~G&
* (non-Javadoc) SCTA=l.
* #BSTlz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D|.ic!w'
*/ twx[s$O'b
public void sort(int[] data) { e#k<d-sf6
int[] temp=new int[data.length]; dh $bfAb
mergeSort(data,temp,0,data.length-1); h?pkE
} D:K4H+ch
3*@5S]]
private void mergeSort(int[] data, int[] temp, int l, int r) { ^urDoB:
int i, j, k; Q1z;/A$Al
int mid = (l + r) / 2; `HBf&Z
if (l == r) x+]\1p
return; s8h-,@p
if ((mid - l) >= THRESHOLD) )K2HK&t:
mergeSort(data, temp, l, mid); & j+oJasI
else KSrx[q
insertSort(data, l, mid - l + 1); ?y!E-&
if ((r - mid) > THRESHOLD) 95V@X ^Ee
mergeSort(data, temp, mid + 1, r); Zcc9e03
else `Ry]y"K
insertSort(data, mid + 1, r - mid); LupkrxV
:Q@&5!]>d
for (i = l; i <= mid; i++) { x|5k<CiA
temp = data; b4pm_Um
} =ha{Ziryo
for (j = 1; j <= r - mid; j++) { &:7ZQ1
temp[r - j + 1] = data[j + mid]; 3=L.uXVb
} Ft!],n-n*
int a = temp[l]; Tq~=TSD
int b = temp[r]; {.?/)
for (i = l, j = r, k = l; k <= r; k++) { 71{p+3Z&
if (a < b) { k|!EDze43?
data[k] = temp[i++]; O &-wxJ]S
a = temp; R`~z0d.
} else { 9cj9SB4
data[k] = temp[j--]; LA)[ip4
b = temp[j]; %?Ev|:i`@
} qQH]`#P
} @qHNE,K
} 6!(@@^7{*
~b2wBs)r
/** ,zTy?OQ
* @param data (zFi$
* @param l k Zq!&
* @param i &EnuE0BD
*/ ^) s2$A:L
private void insertSort(int[] data, int start, int len) { lO_UPC\@fw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %p0xM
} {qa Aq%'
} @#-q^}3
} C;vtY[}<
} Vkc#7W(
w/K_B:s
堆排序： HC}YY2
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package org.rut.util.algorithm.support; 2Roc|)-47
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import org.rut.util.algorithm.SortUtil; aT$9;
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/** .>IhN 5
* @author treeroot MHC^8VL
* @since 2006-2-2 _> *jH'
* @version 1.0 !U~WK$BP
*/ $ <#KA3o\
public class HeapSort implements SortUtil.Sort{ 8M`#pN^
HF.^ysI
/* (non-Javadoc) dB5b@9*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >#y^;/bb
*/ RSfzRnhmr
public void sort(int[] data) { ^!by3Elqqk
MaxHeap h=new MaxHeap(); +@/"%9w
h.init(data); |UxG$M(
for(int i=0;i h.remove(); `WH"%V:"Q
System.arraycopy(h.queue,1,data,0,data.length); .8G@%p{,
} ,5*eX
4BKI-;v$
private static class MaxHeap{ n= u&uqA*
&sL&\+=<(
void init(int[] data){ ?28N ^
this.queue=new int[data.length+1]; M%0C_=zg
for(int i=0;i queue[++size]=data; JQ@E>o7_
fixUp(size); [YcG(^^
} McQe1
} d$Pab*
2FW\O0U
private int size=0; oczN5YSt
`6xkf&Kt
private int[] queue; `u&Zrdr,
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public int get() { ixT:)|'i
return queue[1]; CLJ;<
} TBT:/Vfun
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public void remove() { ^cz(}N 6&
SortUtil.swap(queue,1,size--); t>$kWd{9e;
fixDown(1); [a wjio
} %eO0wa$a
file://fixdown iB& 4>+N+
private void fixDown(int k) { j_.5r&w
int j; t8+X%-r
while ((j = k << 1) <= size) { ]@Uq=?%
if (j < size %26amp;%26amp; queue[j] j++; |VNnOM
if (queue[k]>queue[j]) file://不用交换 nPy$D-L,
break; _<OSqE
SortUtil.swap(queue,j,k); vG"=h%
k = j; uD@#
} lH6OcD:kj
} +P`*kj-P\
private void fixUp(int k) { Kiu_JzD
while (k > 1) { 1jF`5k
int j = k >> 1; csW43&
if (queue[j]>queue[k]) L=sYLC6d
break; Nu?-0>
SortUtil.swap(queue,j,k); K%RxwM
k = j; #a8B/-
} VN\W]jT
} (j3xAA
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} -3=#u_
?qWfup\S
} @6]sNm
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SortUtil： ZU%[guf
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package org.rut.util.algorithm; OD6\Mr2=
sv&;Y\2c
import org.rut.util.algorithm.support.BubbleSort; B2'i7Ps
import org.rut.util.algorithm.support.HeapSort; EKsT~SS
import org.rut.util.algorithm.support.ImprovedMergeSort; ;k>&FWEG
import org.rut.util.algorithm.support.ImprovedQuickSort; |~vI3]}fx
import org.rut.util.algorithm.support.InsertSort; \S!e![L/
import org.rut.util.algorithm.support.MergeSort; 5?F__Hx*2
import org.rut.util.algorithm.support.QuickSort; PC-"gi=h
import org.rut.util.algorithm.support.SelectionSort; x?2@9u8Yb
import org.rut.util.algorithm.support.ShellSort; yooX$
OZ~5*v
/** %~E ?Z!_W
* @author treeroot UZJCvfi
* @since 2006-2-2 /! "|_W|n
* @version 1.0 "Pu!dJ5[]
*/ f>UXD
public class SortUtil { E(8* pI
public final static int INSERT = 1; m;GbLncA
public final static int BUBBLE = 2; 8)10o,#L
public final static int SELECTION = 3; rFj-kojg
public final static int SHELL = 4; vPTM
public final static int QUICK = 5; 9vGu0Um
public final static int IMPROVED_QUICK = 6; to DG7XN}
public final static int MERGE = 7; dE4L=sTEsy
public final static int IMPROVED_MERGE = 8; sE Q=dcK
public final static int HEAP = 9; yEhTNBa*h{
:<bB?N(
public static void sort(int[] data) { #0P$M!%
sort(data, IMPROVED_QUICK); )\J+Kiy)
} 1Y7Eajt-5
private static String[] name={ V4'YWdTi
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HoRg^Ai?\
}; )quM4=u'
A|X">,A
private static Sort[] impl=new Sort[]{ #AL=f'2=f
new InsertSort(), DkvF5c&
new BubbleSort(), R|(q
new SelectionSort(), I uMQ9&
new ShellSort(), Tk:h@F|B.|
new QuickSort(), =,_ +0M9
new ImprovedQuickSort(), LIvFx|
new MergeSort(), H1QJk_RL
new ImprovedMergeSort(), 8TLgNQP
new HeapSort() Af'" 6BS
}; ]v]qChZHd
jU9$Ehg I
public static String toString(int algorithm){ WSp
return name[algorithm-1]; 5ft`zf
} 117EZg]O
&3J_^210
public static void sort(int[] data, int algorithm) { uao0_swW5
impl[algorithm-1].sort(data); S~;4*7+?:
} 1^7hf;|#g
w&o&jAb-M
public static interface Sort { $Bs {u=+w
public void sort(int[] data); )ttUWy$w
} ,+meT`'vn
+wN^c#~7
public static void swap(int[] data, int i, int j) { ,y 2$cO_>
int temp = data; 7BK0}sxO
data = data[j]; jY%na HaI
data[j] = temp; K1\a#w
} @Z\,q's
} ][9%Kl*%@p