[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; pJ?y
} uxW |&q
int i1=l; 7WV"Wrl]
int i2=mid+1; %i&am=
for(int cur=l;cur<=r;cur++){ MDpx@.A,
if(i1==mid+1) +MS*YpPW
data[cur]=temp[i2++]; fN`Prs A
else if(i2>r) |r*y63\T
data[cur]=temp[i1++]; ~HctXe'x
else if(temp[i1] data[cur]=temp[i1++]; Ow0~sFz
else T+V:vuK
data[cur]=temp[i2++]; D<Z\6)|%I
} Lxa<zy~b
} 0l(G7Ju
sI)jqHZG
} #;2kN &
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改进后的归并排序: 7CT446
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package org.rut.util.algorithm.support; TIV|7nKL
9dg+@FS}=
import org.rut.util.algorithm.SortUtil; `=TJw,q
S{cK~sZj
/** 'pAq;2AA
* @author treeroot *XXa9z
* @since 2006-2-2 k%RQf0`T
* @version 1.0 WAr6Dv,8
*/ ?AQR\)P
public class ImprovedMergeSort implements SortUtil.Sort { C-2#-{<
eET1f8B=L
private static final int THRESHOLD = 10; CwF=@:*d
o>M&C X+j$
/* `)jAdad-s
* (non-Javadoc) $nthMx$
* mqQ//$Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1 RyvPP
*/ o<S(ODOfi
public void sort(int[] data) { n%dh|j2u
int[] temp=new int[data.length]; (.M &nN'Ce
mergeSort(data,temp,0,data.length-1); gA+@p'XnR
} :JxuaM8
=HoA2,R)
private void mergeSort(int[] data, int[] temp, int l, int r) { M/6q ^*
int i, j, k; `?"[u"*
int mid = (l + r) / 2; *fDhNmQ `
if (l == r) L{1PCs36c
return; .|6Wmn-uS
if ((mid - l) >= THRESHOLD) k1^&;}/f:
mergeSort(data, temp, l, mid); F-?s8RD
else -1F+,+m
insertSort(data, l, mid - l + 1); 9(9\kQj{C
if ((r - mid) > THRESHOLD) 7baQ4QY?n
mergeSort(data, temp, mid + 1, r); y#{> tC
else LZpqv~av
insertSort(data, mid + 1, r - mid); 2)`4(38
0o!Egq_
for (i = l; i <= mid; i++) { $T'lWD*
temp = data; [{-;cpM\
} K30{Fcb< h
for (j = 1; j <= r - mid; j++) { gDsb~>rb|
temp[r - j + 1] = data[j + mid]; sU?%"q
} nrZZkQNI
int a = temp[l]; 9<!Ie^o?
int b = temp[r]; )e\IdKl=
for (i = l, j = r, k = l; k <= r; k++) { XgZ.UT
if (a < b) { XCZNvLG
data[k] = temp[i++]; x_KJCU
a = temp; v+2t;PJd2
} else { 7gbu7"Qc
data[k] = temp[j--]; Pu|3_3^
b = temp[j]; 7NfA)$
} *p%=u>?&
} 8DJoQl9
} pj'[ H
v+`gQXJ"G
/** .37Jrh0Iv
* @param data zC\L-i>G
* @param l !.5,RIf
* @param i 4T:@W C
*/ e/!xyd
private void insertSort(int[] data, int start, int len) { _"c?[n
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dX~$#-Ad86
} 5@@ilvwzz
} q vGkTE
} Ut^ {4_EC
} V> @+&q
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堆排序： 0=KyupwXC
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package org.rut.util.algorithm.support; 5XA{<)$
z0-`D.D@\
import org.rut.util.algorithm.SortUtil; s(Llz]E~ZX
]PjJy/vkjj
/** b$1W>
* @author treeroot 9TbRrS09
* @since 2006-2-2 *5|q_K Pt
* @version 1.0 <%]i7&8|
*/ s8 0$
public class HeapSort implements SortUtil.Sort{ ":N EI
uz;z+Bd^
/* (non-Javadoc) <2{-ey]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J9*$@&@S
*/ hE>%LcP
public void sort(int[] data) { leJ\
MaxHeap h=new MaxHeap(); ,O/ t6'
h.init(data); $Q< >MB7
for(int i=0;i h.remove(); &ywU^hBh
System.arraycopy(h.queue,1,data,0,data.length); )>|x2q
} jUCrj'
aaM76;
private static class MaxHeap{ f& >[$zh
8!(09gW'>
void init(int[] data){ VsM~$ )
this.queue=new int[data.length+1]; V t@]
for(int i=0;i queue[++size]=data; yd4\%%]
fixUp(size); z<9wh2*M
} bs=x>F
} v46 5Z
[GqQ6\
private int size=0; iSg^np
^9*kZV<K
private int[] queue; Pwg?a
)Cfk/OnRd
public int get() { ||t"}Y
return queue[1]; Zw<\^1
} 05gdVa,
1iTI8h&[@
public void remove() { { vOr'j@
SortUtil.swap(queue,1,size--); SV0h'd(b
fixDown(1); B78e*nNS#2
} _)?59
file://fixdown n6]8W^g
private void fixDown(int k) { MYVgi{
int j; )tW0iFY
while ((j = k << 1) <= size) { =9AX\2w*H;
if (j < size %26amp;%26amp; queue[j] j++; soXIPf
if (queue[k]>queue[j]) file://不用交换 2/m4|
break; hFp\,QSx
SortUtil.swap(queue,j,k); 8\{1y:|
k = j; _gl7Ma
} ^\ocH|D
} ~ '/Yp8(
private void fixUp(int k) { c Y(2}Ay
while (k > 1) { 5b5Hc Inu
int j = k >> 1; R *uwp'@
if (queue[j]>queue[k]) TKBW2
break; 2jiH&'@
SortUtil.swap(queue,j,k); 2=/,9ka~
k = j; \hr2#!
} wYAi-gdOi
} [DzZ:8
BL^\"Xh$|
} |qFCzK9tD/
}5qpiS"V9
} $zUHka
Yg kd1uI.
SortUtil： l" P3lKS
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package org.rut.util.algorithm; O4.`N?Xq
9`X}G`
import org.rut.util.algorithm.support.BubbleSort; 7`_`V&3s
import org.rut.util.algorithm.support.HeapSort; :[C"}mR1
import org.rut.util.algorithm.support.ImprovedMergeSort; o!-kwtw`l
import org.rut.util.algorithm.support.ImprovedQuickSort; cA8A^Iv:0
import org.rut.util.algorithm.support.InsertSort; 6A23H7
import org.rut.util.algorithm.support.MergeSort; Cl>{vSN
import org.rut.util.algorithm.support.QuickSort; j}fu|-
import org.rut.util.algorithm.support.SelectionSort; 9H#;i]t&
import org.rut.util.algorithm.support.ShellSort; g/f^|:
R Q2DTQ-$
/** 3JJEj1O
* @author treeroot @zGz8IF
* @since 2006-2-2 =)mA.j}E2
* @version 1.0 I->BDNk
*/ ^ 9`O ^
public class SortUtil { =dM'n}@U
public final static int INSERT = 1; &b:SDl6
public final static int BUBBLE = 2; :qe.*\ c
public final static int SELECTION = 3; ly~tB LH}
public final static int SHELL = 4; zz_(*0,Qcr
public final static int QUICK = 5; 0hr4}FL8
public final static int IMPROVED_QUICK = 6; dn}'B%
public final static int MERGE = 7; VkJBqRzBOa
public final static int IMPROVED_MERGE = 8; SWWeN#Q
public final static int HEAP = 9; w1J%%//(h
<A`zK
public static void sort(int[] data) { Mj5&vs~n;
sort(data, IMPROVED_QUICK); [wv;CUmgc
} eWWtMnq
private static String[] name={ *P0sl( &
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" AREpZ2GiU
}; (R|Ftjs .
>o,l/#z
private static Sort[] impl=new Sort[]{ 1 ` ={**
new InsertSort(), fuao*L]
new BubbleSort(), Pof]9qE-y
new SelectionSort(), mP[ZlS~"
new ShellSort(), /JbO$A
new QuickSort(), q)rxv7Iu\
new ImprovedQuickSort(), ]7DS>%mY(
new MergeSort(), Yx"un4
new ImprovedMergeSort(), KzWqHq
new HeapSort() gO%oA} !i
}; p|9Eue3j2
bTepTWv
public static String toString(int algorithm){ .6HHUy
return name[algorithm-1]; $3)Z>p
} e.VR9O]G
q:ah%x[
public static void sort(int[] data, int algorithm) { s)9d\{
impl[algorithm-1].sort(data); O~DdMW
} 6O\a\z
sX[k}=HCK
public static interface Sort { -a\[`JHi
public void sort(int[] data); !}I+)@~\w
} ={[9kR i
]Mb:zs<r
public static void swap(int[] data, int i, int j) { !&#5*
int temp = data; V<ExR@|}.%
data = data[j]; Gk-49|qIV
data[j] = temp; VbfTdRD-
} hA:RVeS{
} O0RV>Ml'&