[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; }eVDe(7_
} 3tf_\E+mIi
int i1=l; B9NUafK=
int i2=mid+1; X6 BIZ
for(int cur=l;cur<=r;cur++){ DYf2V6'
if(i1==mid+1) CBd%}il
data[cur]=temp[i2++]; u9f^wn
else if(i2>r) U6/7EOW,
data[cur]=temp[i1++]; Jt5V{9:('
else if(temp[i1] data[cur]=temp[i1++]; <=n;5hv:
else bpBn3f`?*
data[cur]=temp[i2++]; Z(6.e8fK
} tAN!LI+w
} c]Epg)E
f DXK<v)
} #`3Q4
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改进后的归并排序: hOB<6Tm[
n'mrLZw
package org.rut.util.algorithm.support; SEI0G_wk$
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import org.rut.util.algorithm.SortUtil; myA;Y
9wR D=a
/** z|3v~,
* @author treeroot @]n8*n
* @since 2006-2-2 q.=Q
* @version 1.0 H7+z"^s*
*/ "~ID.G|<
public class ImprovedMergeSort implements SortUtil.Sort { SOR\oZ7
nqH[ y0
private static final int THRESHOLD = 10; [UXVL}tk
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/* }SWfP5D@
* (non-Javadoc) vy~6]hH
* %q|*}l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "J,|),Yd
*/ ouCh2Y/_
public void sort(int[] data) { =Lkn
int[] temp=new int[data.length]; fC'u-m?!Q'
mergeSort(data,temp,0,data.length-1); sX6\AYF1M
} y<6Sl6l*
4S'e>:
private void mergeSort(int[] data, int[] temp, int l, int r) { o`n8Fk}i
int i, j, k; P-ZvW<M
int mid = (l + r) / 2; nX:E(9q7c
if (l == r) "}_J"%
return; ="]r{
if ((mid - l) >= THRESHOLD) .<QKQ%-
mergeSort(data, temp, l, mid); sd\}M{U
else =iW hK~S
insertSort(data, l, mid - l + 1); vx?KenO}
if ((r - mid) > THRESHOLD) AT I=&O`
mergeSort(data, temp, mid + 1, r); >e!J(4.-
else dE8f?L'
insertSort(data, mid + 1, r - mid); 75H!i$(*+
<y?+xZM]#|
for (i = l; i <= mid; i++) { =b$g_+
temp = data; 7Z2D}O+
} w aniCEo
for (j = 1; j <= r - mid; j++) { lB _9b_|2
temp[r - j + 1] = data[j + mid]; ?H8w;Csq-
} 4e>f}u5
int a = temp[l]; ?&0CEfa?
int b = temp[r]; |rJN
for (i = l, j = r, k = l; k <= r; k++) { o%+w:u.
if (a < b) { gtH^'vFZ
data[k] = temp[i++]; U $#^ e
a = temp; WY|~E%k
} else { CX/[L)|Ru
data[k] = temp[j--]; b(N+_= n
b = temp[j]; ;sA 5&a>!
} 4'D^>z!c
} ij]~n
} 9HR1m3
^) s6`:
/** pqs!kSJV
* @param data P}AwE,&Q
* @param l %62|dhl6
* @param i LT{g^g
*/ ksU& q%1
private void insertSort(int[] data, int start, int len) { "T /$K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0o7o;eN
} t_I-6`8o]
} n.N0Nhd
} 6$PQ$
} $Rze[3
*RJD^hu
堆排序： A\mSS
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package org.rut.util.algorithm.support; ^K`PYai
L7 FFa:#
import org.rut.util.algorithm.SortUtil; 8B6(SQp%
/tkV/
/** i|H^&$|
* @author treeroot /!&eP3^
* @since 2006-2-2 `Q+O#l?
* @version 1.0 # .&t'"u
*/ ow (YgM>t
public class HeapSort implements SortUtil.Sort{ (Z@-e^R
{3os9r,
/* (non-Javadoc) p&(z'd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kazgI>"Q8
*/ }rVLWt
public void sort(int[] data) { KxmB$x5-=8
MaxHeap h=new MaxHeap(); p&XuNk
h.init(data); JvT#Fxjk
for(int i=0;i h.remove(); |&S^L}V.C
System.arraycopy(h.queue,1,data,0,data.length); ~EDO< O>3
} !+hw8@A
qCk`398W
private static class MaxHeap{ |.~2C14[
t P'._0n0
void init(int[] data){ IH=%%AS
this.queue=new int[data.length+1]; Ka{QjW!%d<
for(int i=0;i queue[++size]=data; a#Z#-y!
fixUp(size); \ 511?ik
} k fOd|-
} q/7T-"q/G
L{f0r!d|
private int size=0; Ov:U3P?%
7'{%djL
private int[] queue; 3gCP?%R
4GJx1O0Ol
public int get() { ^7kYG7/
return queue[1]; OJ\j6owA
} a$11u.\q+
p|>/Hz1v
public void remove() { }z-)!8vF
SortUtil.swap(queue,1,size--); %E":Wv
fixDown(1); ac43d`wpK
} &~)1mnv.
file://fixdown BYI13jMH+Y
private void fixDown(int k) { t(^Lh.<a
int j; zW95qxXg
while ((j = k << 1) <= size) { 65c#he[_Y
if (j < size %26amp;%26amp; queue[j] j++; fxD|_
if (queue[k]>queue[j]) file://不用交换 vf<Tq
break; }WNgKw
SortUtil.swap(queue,j,k); a^L'-(
k = j; h_t<Jl
} o[G,~f\-
} P-N+
private void fixUp(int k) { U,2\ TBz
while (k > 1) { FefS]G
int j = k >> 1; {M0pq3SL*t
if (queue[j]>queue[k]) uc;,JX!bN
break; X2('@Yh
SortUtil.swap(queue,j,k); rI]n4>k{
k = j; D7N` %A8
} {<^PYN>`
} bJ.68643
ps]s Tw
} J}&xS<
8+~|!)a
} ZnB|vfL?
/I#SP/M&l
SortUtil： %$(*.o!+8
}15ooe%
package org.rut.util.algorithm; 0'y3iar
L5>.ku=T
import org.rut.util.algorithm.support.BubbleSort; gY@$g
import org.rut.util.algorithm.support.HeapSort; KA{Y*m^7
import org.rut.util.algorithm.support.ImprovedMergeSort; \tg}K0E?R5
import org.rut.util.algorithm.support.ImprovedQuickSort; !P* z=
import org.rut.util.algorithm.support.InsertSort; "(y|iS$^T
import org.rut.util.algorithm.support.MergeSort; A!5)$>!o
import org.rut.util.algorithm.support.QuickSort; Z}6H529[
import org.rut.util.algorithm.support.SelectionSort; }~o>H a;
import org.rut.util.algorithm.support.ShellSort; h3L{zOff
kF*^" Cn
/** Kd,7x'h`E
* @author treeroot @7B!(Q
* @since 2006-2-2 .zyi'Kj
* @version 1.0 y>m=A41:g
*/ XS"lR |
public class SortUtil { yu62$d
public final static int INSERT = 1; 8h7z
public final static int BUBBLE = 2; itIzs99j
public final static int SELECTION = 3; :~]ha
public final static int SHELL = 4; ,`< [ej
public final static int QUICK = 5; K1Wiiw
public final static int IMPROVED_QUICK = 6; ijWn,bj
public final static int MERGE = 7; 1QH5<)Oa
public final static int IMPROVED_MERGE = 8; {wp"zaa
public final static int HEAP = 9; 6tmn1:
z+B"RV
public static void sort(int[] data) { <P1sK/IZb
sort(data, IMPROVED_QUICK); iY1JU-S
} wp8ocZ-Gj
private static String[] name={ U.QjB0;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KC{HX?
}; }<kpvd+ps=
8CKI9
private static Sort[] impl=new Sort[]{ lGr(GHn
new InsertSort(), Doy7prKI8
new BubbleSort(), Obu>xK(
new SelectionSort(), x5}Ru0Z
new ShellSort(), m48m5>
new QuickSort(), 5*pCb,z>q
new ImprovedQuickSort(), J$D#)w!$j
new MergeSort(), QR($KW(
new ImprovedMergeSort(), Y/_b~Ahn
new HeapSort() IGd]!
}; _(s|@UT#
<ibEo98
public static String toString(int algorithm){ L?e N(L
return name[algorithm-1]; %<w)#eV?
} ']ussFaQ
n-n{+Dl!
public static void sort(int[] data, int algorithm) { vHPp$lql
impl[algorithm-1].sort(data); p M:lg
} X4U$#uI{
rOu7r4
public static interface Sort { bytAdS$3
public void sort(int[] data); |};P"&
} {1V~`1(w
)xuvY3BPB?
public static void swap(int[] data, int i, int j) { 8D U|j-I8
int temp = data; EsU-Ckb_2:
data = data[j]; +,"/z\QO
data[j] = temp; =FXZcP>h
} @<O Bt d
} Ul@yXtj