[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; S<Od`I
} (>M? iB
int i1=l; P`TJqJiY~
int i2=mid+1; CEl9/"0s6
for(int cur=l;cur<=r;cur++){ _4-UM2o;
if(i1==mid+1) 0*F<tg,+]
data[cur]=temp[i2++]; 6H'W]T&
else if(i2>r) .F^372hH3
data[cur]=temp[i1++]; JGG(mrvR
else if(temp[i1] data[cur]=temp[i1++]; 7L !$hk
else !v68`l15
data[cur]=temp[i2++]; 6#upBF:
} _]6n]koD,
} AoFxho
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} ukwO%JAr
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改进后的归并排序: w7`09oJm
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package org.rut.util.algorithm.support; %Gc)$z/Wd
Xn #v!
import org.rut.util.algorithm.SortUtil; \?~cJMN
n1PV/ Z
/** AEE&{_[S
* @author treeroot `FHKQS5
* @since 2006-2-2 ?my2dd,|
* @version 1.0 aM!%EaT
*/ )m<CmYr2
public class ImprovedMergeSort implements SortUtil.Sort { =)IV^6~b
Pt\GVWi_t
private static final int THRESHOLD = 10; HMl M!Xk?
H}PZJf_E
/* Cd'`rs}3
* (non-Javadoc) E:ti]$$
* Ck>{7Gw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |?<^4U8
*/ L.Tu7+M4
public void sort(int[] data) { c$b~?Mx
int[] temp=new int[data.length]; {N'<_%cu
mergeSort(data,temp,0,data.length-1); ~fY\;
} SI9PgC
fp?cb2'7
private void mergeSort(int[] data, int[] temp, int l, int r) { {vox x&UX
int i, j, k; O%*:fd,o-
int mid = (l + r) / 2; Vl`!6.F3
if (l == r) \kEC|O)8
return; a_U[!`/w
if ((mid - l) >= THRESHOLD) q:<vl^<j
mergeSort(data, temp, l, mid); ~=k?ea/>
else @@"abhT
insertSort(data, l, mid - l + 1); JL!:`#\
if ((r - mid) > THRESHOLD) (g3@3.Kk)
mergeSort(data, temp, mid + 1, r); `L7Cf&W\l8
else /33m6+
insertSort(data, mid + 1, r - mid); 9?zi
0T.kwZ8
for (i = l; i <= mid; i++) { gtRVXgI
temp = data; sM6o(=>
} ,u^%[ejH
for (j = 1; j <= r - mid; j++) { @r3,|tkrz
temp[r - j + 1] = data[j + mid]; y7U?nP ')+
} g[ O6WZ!F_
int a = temp[l]; <m0m8p"G
int b = temp[r]; $8WeWmY
for (i = l, j = r, k = l; k <= r; k++) { Rg%Xy`gS
if (a < b) { 3S{3AmKj?
data[k] = temp[i++]; ^Fg!.X_
a = temp; \W+Hzf] W#
} else { :@#6]W
data[k] = temp[j--]; OCv,EZ
b = temp[j]; /amWf^z
} V#TNv0&0
} -muP.h/
} I/)*pzt8
N?><%fra
/** ~'VVCtA
* @param data nUScDb2|
* @param l 7Y6b<:4j
* @param i 8c5=Px2\
*/ J!d=aGY0-
private void insertSort(int[] data, int start, int len) { )*nZ6Cg'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z=9gok\
} r;@"s g
} FE3uNfQs|
} EpB3s{B"
} DA^!aJ6iF
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堆排序： (CrP6]=
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package org.rut.util.algorithm.support; hUe\sv!x?
;!,I1{`
import org.rut.util.algorithm.SortUtil; .Z(Q7j^
(N?nOOQ
/** u]sxX")
* @author treeroot c]A @'{7
* @since 2006-2-2 zvR;Tl6]
* @version 1.0 iiv`ji
*/ C@!bd+'
public class HeapSort implements SortUtil.Sort{ m*vz
=+w/t9I[
/* (non-Javadoc) &/8B(0<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JQ9+kZ
*/ .$a|&P=S
public void sort(int[] data) { w}0rDWuR[
MaxHeap h=new MaxHeap(); @YbZ"Jb
h.init(data); _V(FHjY
for(int i=0;i h.remove(); Xa_:B\ic
System.arraycopy(h.queue,1,data,0,data.length); bJ^Jmb
} lu;gmWz
*3rp g
private static class MaxHeap{ N9 TM
;^cMP1SH
void init(int[] data){ )WsR 8tk
this.queue=new int[data.length+1]; +2g}wH)l
for(int i=0;i queue[++size]=data; SXx4^X
fixUp(size); rm4t
} `.3{
} ;E0x#JUrw
: `,#z?Rk
private int size=0; GjyTM
z[l_<`J$9
private int[] queue; ^f9>tI{
`$XgfMBf |
public int get() { #6mr'e1
return queue[1]; ce7$# #f
} Q}|0
<jqL4!<
public void remove() { 11RqP:zg
SortUtil.swap(queue,1,size--); L'O=;C"f
fixDown(1); eN0lJ~
} DaqlL
file://fixdown oF_ '<\ly=
private void fixDown(int k) { ;i!$rL
int j; Z_s]2y1
while ((j = k << 1) <= size) { F%$lcQ04%
if (j < size %26amp;%26amp; queue[j] j++; lcXo>
if (queue[k]>queue[j]) file://不用交换 `l
break; dQ Lo,S8(
SortUtil.swap(queue,j,k); Kl]l[!c7$
k = j; \qJ cs'D
} # blh9.V&F
} pV*d"~T
private void fixUp(int k) { @ 1FWBH~
while (k > 1) { jQ['f\R
int j = k >> 1; [nLd>2P
if (queue[j]>queue[k]) `KUL4) g~
break; x LGMN)@r
SortUtil.swap(queue,j,k); rges`&0
k = j; %'eaW
} /4$ c-k
} 1w#vy1m J
Y4N)yMSl"
} M$e$%kPShE
#M<u^$Jz
} !}q@O-}j
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SortUtil： 7-mo\jw<
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package org.rut.util.algorithm; rBZ00}
vy5I#q(k
import org.rut.util.algorithm.support.BubbleSort; g{JH5IZ~
import org.rut.util.algorithm.support.HeapSort; l"%WXi"X
import org.rut.util.algorithm.support.ImprovedMergeSort; 99~ZZG
import org.rut.util.algorithm.support.ImprovedQuickSort; QB*n [(?
import org.rut.util.algorithm.support.InsertSort; U["IXR#
import org.rut.util.algorithm.support.MergeSort; j.:f=`xf
import org.rut.util.algorithm.support.QuickSort; P_(<?0l
import org.rut.util.algorithm.support.SelectionSort; {6iHUK
import org.rut.util.algorithm.support.ShellSort; n1)].`
0>:`|IGnT2
/** NN~PWy1opa
* @author treeroot jV' tcFr4
* @since 2006-2-2 caZEZk#r;
* @version 1.0 GK&R.R]
*/ RQ,X0pS
public class SortUtil { qWJap-hb
public final static int INSERT = 1; {'cdi`
public final static int BUBBLE = 2; %:y"o_X_
public final static int SELECTION = 3; j#${L6
public final static int SHELL = 4; &Qt1~#1
public final static int QUICK = 5; R^rA.7T
public final static int IMPROVED_QUICK = 6; ).jna`A,
public final static int MERGE = 7; qot{#tk d
public final static int IMPROVED_MERGE = 8; w[J.?v&^
public final static int HEAP = 9; ?uXY6J"
ZK8DziO
public static void sort(int[] data) { :fQN_*B4@4
sort(data, IMPROVED_QUICK); (qDJgf4fgn
} CFeAKjG
private static String[] name={ *2Q x69`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *-gmWATC6
}; e r"gPW
d4o_/[
private static Sort[] impl=new Sort[]{ fa,;Sw
new InsertSort(), ~TjTd
new BubbleSort(), c}w[T
new SelectionSort(), [yVcH3GcjI
new ShellSort(), 'h 7n}
new QuickSort(), cyWDtq
new ImprovedQuickSort(), kS_37-;
new MergeSort(), 3Z74&a$
new ImprovedMergeSort(), X iM{YZ`B
new HeapSort() ar@ysBy
}; M+lI,j+
#J%Fi).^)
public static String toString(int algorithm){ [Rzn>
return name[algorithm-1]; [}y"rs`!
} kLbo |p"cT
h|ja67VG
public static void sort(int[] data, int algorithm) { \?AA:U*
impl[algorithm-1].sort(data); kaVYe)~
} HK<oNr.d52
hYh~[Kr^@^
public static interface Sort { 6H:EBj54?
public void sort(int[] data); {=_xze)
} YrTjHIn~w
2hTH
public static void swap(int[] data, int i, int j) { I#|ib
int temp = data; OgkbN`
data = data[j]; (Jk:Qz5
data[j] = temp; 2_){4+,fu
} 6/Z 8/PL
} 42 Sk`