[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; aHzHvl
} b;cMl'
int i1=l; E%N2k|%8d_
int i2=mid+1; }hpmO-
for(int cur=l;cur<=r;cur++){ yV_wDeAz
if(i1==mid+1) TFQ!7'xk)
data[cur]=temp[i2++]; {FO$yw=>
else if(i2>r) 5 `/< v^
data[cur]=temp[i1++]; rf&M!d}!
else if(temp[i1] data[cur]=temp[i1++]; %3r:s`{
else z(y*hazK
data[cur]=temp[i2++]; GEUg]nw
} %/%UX{8R
} R9+jW'[K
~a9W3b4j
} iA }vKQ
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改进后的归并排序: ;]2s,za)qs
SkQswH
package org.rut.util.algorithm.support; E0n6$5Uc?
!~i' -4]
import org.rut.util.algorithm.SortUtil; yY).mxRN
@C_KV0i
/** tz NlJ~E
* @author treeroot >o,^b\
* @since 2006-2-2 /#NYi,<{X
* @version 1.0 Q n)d2-<
*/ w*9br SK
public class ImprovedMergeSort implements SortUtil.Sort { k44Q):ncY7
5*%#o
private static final int THRESHOLD = 10; "UFs~S|e
0pb'\lA
/* m7c*)"^
* (non-Javadoc) Y$K!7Kq
* Cizvw'XDV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YIhm$A"z0"
*/ `mfq 2bVc
public void sort(int[] data) { >4` dy
int[] temp=new int[data.length]; T=f|,sK +7
mergeSort(data,temp,0,data.length-1); yM.IxpT#$
} ZFm`UXS
;h=*!7:
private void mergeSort(int[] data, int[] temp, int l, int r) { E(pF:po
int i, j, k; {PU!=IkTS
int mid = (l + r) / 2; 'wasZ b<^
if (l == r) UB`ToE|Ii
return; wBj-m
if ((mid - l) >= THRESHOLD) .jw}JJ
mergeSort(data, temp, l, mid); {]*x*aa\
else rHge~nY<
insertSort(data, l, mid - l + 1); aVs(EHF
if ((r - mid) > THRESHOLD) T VmH
mergeSort(data, temp, mid + 1, r); ^[E'1$D
else Ox!U8g8c
insertSort(data, mid + 1, r - mid); lH^^77"4Qo
ocbB&
for (i = l; i <= mid; i++) { @Hb'8F
temp = data; BaF!O5M
} ,fDEz9-,
for (j = 1; j <= r - mid; j++) { `^JJ&)4iv
temp[r - j + 1] = data[j + mid]; n"PJ,ao
} s.Y4pWd5@
int a = temp[l]; %_-zWVJ
int b = temp[r]; q#A(gyy
for (i = l, j = r, k = l; k <= r; k++) { lASL8O&\
if (a < b) { n]_[NR) i
data[k] = temp[i++]; UV 4>N
a = temp; RgdysyB
} else { YpAg
data[k] = temp[j--]; |'ln?D:&
b = temp[j]; n6d9\
} V"o7jsFH6n
} Jf)bHjC_V
} jxaD&4Fs8
j:T/iH!YF
/** []R? ViG
* @param data o;a:Dd
* @param l 6Tw#^;q-
* @param i _-!sBK+F
*/ %D$,;{ew
private void insertSort(int[] data, int start, int len) { V-I(WzR9y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kd:$oS_*s
} c3*t_!@oC
} SKuIF*"!S
} )0vU k
} _\PNr.D8
o}Odw;
堆排序： -4w=s|#.\
PjT=$]
package org.rut.util.algorithm.support; .roqEasu8
v8gdU7Ll,
import org.rut.util.algorithm.SortUtil; (6CN/A{qe
M2x["
/** #*$P'r
* @author treeroot (iJ1 ;x
* @since 2006-2-2 !MDNE*_
* @version 1.0 U-k+9f 0
*/ R3)57OyV
public class HeapSort implements SortUtil.Sort{ 07Gv*.
w;}@'GgL
/* (non-Javadoc) `~eX55W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zl-2$}<a
*/ M/?KV9Xk2
public void sort(int[] data) { 9odJr]
MaxHeap h=new MaxHeap(); "'8KV\/D
h.init(data); .@-9'<K?~
for(int i=0;i h.remove(); ML-)I&>tT
System.arraycopy(h.queue,1,data,0,data.length); |4mpohX
} Cz4)Yz
`b8v1Os^2
private static class MaxHeap{ scuHmY0
,P'P^0qJ
void init(int[] data){ >&g}7d%
this.queue=new int[data.length+1]; '}g*!jL
for(int i=0;i queue[++size]=data; +X`V|E,no
fixUp(size); I)q,kP@yY
} _LAS~x7,
} HkV1sT
IX: 25CEI2
private int size=0; 2)#K+O3c
8Y0"Cejq
private int[] queue; PiV7*F4qI.
n9pN6,o+
public int get() { 1Gt/Tq$_b
return queue[1]; <PPNhf8
} wxm:7$4C
tx"sH]n
public void remove() { BQcE9~H
SortUtil.swap(queue,1,size--); JGC=(;
fixDown(1); *`j-i
} _A<u#.yd
file://fixdown }?cGf-c
private void fixDown(int k) { tt%MoQ)
int j; A*./,KT
while ((j = k << 1) <= size) { {QBB^px
if (j < size %26amp;%26amp; queue[j] j++; x}U8zt)yD3
if (queue[k]>queue[j]) file://不用交换 ze_{=Cv&Y
break; Wv__ wZ
SortUtil.swap(queue,j,k); `28};B>
k = j; %}86D[PF
} M :3u@06a
} ] 2DH;
private void fixUp(int k) { K.G$]H
while (k > 1) { =.y*_Ja
int j = k >> 1; HL/bS/KX
if (queue[j]>queue[k]) uE[(cko
break; OmM=o*d
SortUtil.swap(queue,j,k); +\li*G]:J
k = j; #`GY}-hL!
} S$f6a'
} Q0Nyqhvi
)uv=S;+
} _3]][a,
{_(\`>
} as=m`DqOh
n~g)I&
SortUtil： ]zO/A4
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package org.rut.util.algorithm; /h v4x9
k3+e;[My+
import org.rut.util.algorithm.support.BubbleSort; >7!6nF3x,
import org.rut.util.algorithm.support.HeapSort; )s1Ib4C
import org.rut.util.algorithm.support.ImprovedMergeSort; K:'q>D@
import org.rut.util.algorithm.support.ImprovedQuickSort; }M1sksk5
import org.rut.util.algorithm.support.InsertSort; ZEYgK)^
import org.rut.util.algorithm.support.MergeSort; |F.)zC5{
import org.rut.util.algorithm.support.QuickSort; 7?B.0>$3>V
import org.rut.util.algorithm.support.SelectionSort; ,!V]jP)
import org.rut.util.algorithm.support.ShellSort; @&D?e:|!U
;> m"x
/** X1ZgSs+i
* @author treeroot vP7K9Kx
* @since 2006-2-2 GDYFU*0
* @version 1.0 9%*wb`&
*/ >3awn*N
public class SortUtil { :'aAZegQY
public final static int INSERT = 1; 3E f1bhi
public final static int BUBBLE = 2; /-6S{hl9Ne
public final static int SELECTION = 3; qO`)F8
public final static int SHELL = 4; tpy>OT$
public final static int QUICK = 5; 6#j$GH *
public final static int IMPROVED_QUICK = 6; Ro2d,'
public final static int MERGE = 7; `h}q Eo`
public final static int IMPROVED_MERGE = 8; 9N%JP+<89
public final static int HEAP = 9; H _Va"yTO6
nhG J
public static void sort(int[] data) { "O8gJ0e
sort(data, IMPROVED_QUICK); IVlf=k
} Hi_G
private static String[] name={ =8gHS[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zI~owK)%Z
}; 47r_y\U h
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private static Sort[] impl=new Sort[]{ CF|]e:
new InsertSort(), )otb>w5
new BubbleSort(), (HoqR
new SelectionSort(), u*
new ShellSort(), 9 2MTX Osp
new QuickSort(), @\&m+;6
new ImprovedQuickSort(), fF*`'i=!
new MergeSort(), $,xnU.n
new ImprovedMergeSort(), bqanFQj
new HeapSort() O4<g%.HC6
}; a?yMHb{F
/~4"No@
public static String toString(int algorithm){ ~x{.jn
return name[algorithm-1]; 6z,&i
} ~)?
fjnTe
public static void sort(int[] data, int algorithm) { y/V%&.$o=
impl[algorithm-1].sort(data); GRy-+#,b"
} =66Nw(E.
E&Qi@Ty
public static interface Sort { ::n;VY2&
public void sort(int[] data); P,ua<B}L
} bslrqUk_`=
Y2o6kS{x
public static void swap(int[] data, int i, int j) { )Qm[[pnj
int temp = data; "uLjIIl
data = data[j]; +!f=jg06
data[j] = temp; ( 6(x'ByT
} E1;@=#t2i
} %LXM+<N8