[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; 0q`n]NM
} .du FMJl
int i1=l; 4J3cQ;z
int i2=mid+1; X_Vj&{
for(int cur=l;cur<=r;cur++){ Op^r}7
if(i1==mid+1) $OK}jSH*v)
data[cur]=temp[i2++]; jRP.Je@t
else if(i2>r) ;`IZ&m$
data[cur]=temp[i1++]; c` ^I% i
else if(temp[i1] data[cur]=temp[i1++]; I_s4Pf[l
else x}I'W?g
data[cur]=temp[i2++]; .c~`{j}
} Z'EXq.hk
} {VqcZhqy/l
_JZS;8WYR
} L1;IXCc=
9$F '*{8
改进后的归并排序: c}K>#{YeB
R(Y4nw+Y-
package org.rut.util.algorithm.support; FV|/o%XqK
]i\C4*
import org.rut.util.algorithm.SortUtil; Yhu 6QyRV
9l9h*Pgt
/** ,Q~C F;qe
* @author treeroot ^i}*$ZC72
* @since 2006-2-2 5(kRFb'31F
* @version 1.0 ajFSbi)l
*/ :|i jCg+
public class ImprovedMergeSort implements SortUtil.Sort { umV5Y`
S EdNH.|I
private static final int THRESHOLD = 10; bM`7>3 d7E
|,k,X}gP
/* z.itVQs$I
* (non-Javadoc) qE73M5L&
* 86(8p_&zC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -z%| Jk
*/ _+z5~6>
public void sort(int[] data) { 3(|8gWQ
int[] temp=new int[data.length]; p-QD(+@M
mergeSort(data,temp,0,data.length-1); alM ^ X
} -xi]~svg
f(Jz*el S
private void mergeSort(int[] data, int[] temp, int l, int r) { /8 /2#`3R
int i, j, k; ptXCM[Z+
int mid = (l + r) / 2; 1RC(T{\x
if (l == r) u'"VbW3u n
return; >W%tEc
if ((mid - l) >= THRESHOLD) lqPzDdC^>
mergeSort(data, temp, l, mid); gKK*` L~
else )sg@HFhY'
insertSort(data, l, mid - l + 1); j_2-
if ((r - mid) > THRESHOLD) xf/ SUO F
mergeSort(data, temp, mid + 1, r); f{=0-%dA
else +/,J$(
insertSort(data, mid + 1, r - mid); nY7 ZK
!o A,^4(
for (i = l; i <= mid; i++) { 7I>@PVN
temp = data; @ %LrpD
} 4f+R}Ee7
for (j = 1; j <= r - mid; j++) { G?\\k[#,&
temp[r - j + 1] = data[j + mid]; u*/.
} ;Js-27_0
int a = temp[l]; fg1_D
int b = temp[r]; rap`[O|l=
for (i = l, j = r, k = l; k <= r; k++) { 8t3,}}TJ
if (a < b) { "0al"?
data[k] = temp[i++]; R<>ptwy
a = temp; }lZfZ?oAz
} else { k`H#u,&
data[k] = temp[j--]; v6B}ov[Y2
b = temp[j]; Qp9)Rc5
} G-?y;V 1
} +c@s
} cTW3\S=
t)Q6A@$:
/** Ra%" +=
* @param data g~EJja;
* @param l FSnF>3kj-
* @param i WZkAlg7Z
*/ 0'ha!4h3Z
private void insertSort(int[] data, int start, int len) { 9/N=7<$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Hk)IV"[R
} w#EP`aM2$=
} |y+<|fb,a
} s>8;At-
} =?Y%w%2
CT1)tRN
堆排序： fhCMbq4T
a`XXz
package org.rut.util.algorithm.support; 4,D$% .
W10=SM}
import org.rut.util.algorithm.SortUtil; 24u;'i-y5
v[efM8
/** qF9z@a
* @author treeroot )@"iWQ3K
* @since 2006-2-2 . e' vc
* @version 1.0 $f`\TKlN
*/ L8"0o 0-
public class HeapSort implements SortUtil.Sort{ ]F:5-[V#
+r0ItqkM
/* (non-Javadoc) Z]H`s{3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rp*f)rJ
*/ ,'~8{,h5
public void sort(int[] data) { $GI2rzh
MaxHeap h=new MaxHeap(); NY.Y=CF("
h.init(data); yHS=8!
for(int i=0;i h.remove(); tBSHMz
System.arraycopy(h.queue,1,data,0,data.length); *uJcB|KX
} }*4K{<02
G,+-}~$_
private static class MaxHeap{ # fvt:iE
7]}n0*fe
void init(int[] data){ \nQV{J
this.queue=new int[data.length+1]; l(;~9u0sa
for(int i=0;i queue[++size]=data; {Vy2uow0
fixUp(size); }cDw9;~D
} laVqI|0q
} *`]LbS
EjZ_|Q
private int size=0; bDh,r!I
:q6j{C(
private int[] queue; :Osw4u]JXd
EyJWi<
public int get() { Eg&oAY.U
return queue[1]; #:E}Eby/6I
} 0 t.'?=
5#Z>}@/
public void remove() { cuenDw=eC
SortUtil.swap(queue,1,size--); Y*!J +A#
fixDown(1); 6.X| .N
} q/I':a[1
file://fixdown 3C8cvi[IS
private void fixDown(int k) { JO*}\Es
int j; gmG M[c\
while ((j = k << 1) <= size) { =pQ'wx|>|
if (j < size %26amp;%26amp; queue[j] j++; Uy8r !9O
if (queue[k]>queue[j]) file://不用交换 {FV_APL9_
break; Ja$Ple*XU8
SortUtil.swap(queue,j,k); k%UE^
k = j; crx8+
} 5X2&hG*
} TFrZ+CcWp2
private void fixUp(int k) { MfzSoxCb
while (k > 1) { 3LT[?C]H$
int j = k >> 1; Tk(ciwB
if (queue[j]>queue[k]) ,{{e'S9cy
break; :u}FF"j
SortUtil.swap(queue,j,k); qo2/?]
k = j; /%W&zd=%#
} mJjd2a"vi
} !U}dYB:O
.c#G0t<i[
} xl.iI$P
R*m=V{iu`
} h_O6Z2J1
{*EA5;
SortUtil： # tN#_<W
Q>`|{m
package org.rut.util.algorithm; 8t{-
E_t ^osY&
import org.rut.util.algorithm.support.BubbleSort; '`.bmiM
import org.rut.util.algorithm.support.HeapSort; BT?)-wS
import org.rut.util.algorithm.support.ImprovedMergeSort; dEz7 @T
import org.rut.util.algorithm.support.ImprovedQuickSort; ,yZvT7
import org.rut.util.algorithm.support.InsertSort; xx^7
import org.rut.util.algorithm.support.MergeSort; ^zdZ"\x
import org.rut.util.algorithm.support.QuickSort; Z_Tu* F
import org.rut.util.algorithm.support.SelectionSort; gQXB=ywF
import org.rut.util.algorithm.support.ShellSort; #=>t6B4af
XYeuYLut
/** ^pAgo B
* @author treeroot i+`N0!8lY
* @since 2006-2-2 Knd2s~S
* @version 1.0 La$*)qD,
*/ :C%cnU;N
public class SortUtil { 8KQD w:
public final static int INSERT = 1; &<Gs@UX~w
public final static int BUBBLE = 2; MoIq)5/
public final static int SELECTION = 3; 7 (}gs?&w
public final static int SHELL = 4; IF"-{@
public final static int QUICK = 5; (]*otVJ
public final static int IMPROVED_QUICK = 6; ?`jh5Kw%y
public final static int MERGE = 7; Xbm\"g \
public final static int IMPROVED_MERGE = 8; n*7Ytz3#'
public final static int HEAP = 9; _FG?zE
^Q)&lxlxpx
public static void sort(int[] data) { ryk(Am<
sort(data, IMPROVED_QUICK); .i^aYbB$X
} 6xLLIby,
private static String[] name={ '"#W!p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zUw=e}?:
}; JqX+vRY;dd
XeGtge/}T
private static Sort[] impl=new Sort[]{ })zYo 7
new InsertSort(), lwY2zX&%)/
new BubbleSort(), t-, =sV
new SelectionSort(), }3{ x G+,
new ShellSort(), #q[k"x=c
new QuickSort(), *^]lFuX\&E
new ImprovedQuickSort(), Us5P?}
new MergeSort(), eiiI Wr_7
new ImprovedMergeSort(), ups]k?4
new HeapSort() 2aROY2
}; 4T]n64Yid
VeLuL:4I
public static String toString(int algorithm){ p3sR>ToJ
return name[algorithm-1]; 6xFvu7L_c;
} ?8{x/y:
:E$<!q
public static void sort(int[] data, int algorithm) { %TOYU(k
impl[algorithm-1].sort(data); X`REhvT
} @wzzI 7}C
u0Nag=cU
public static interface Sort { H<hFA(M
public void sort(int[] data); U{^~X_?
} Iuh1tcc
jB"?iC.
public static void swap(int[] data, int i, int j) { 9ZKB,
int temp = data; yXuc<m
data = data[j]; epWTZV(1x
data[j] = temp; s]D&):
} -!p +^wC
} W,\LdQ