[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; M%"{OHj!o
} gBd@4{y6C.
int i1=l; dO!5` ]
int i2=mid+1; m>&:)K}m
for(int cur=l;cur<=r;cur++){ * G0I2
if(i1==mid+1) $-p#4^dg
data[cur]=temp[i2++]; F|! ib5
else if(i2>r) F7lzc)
data[cur]=temp[i1++]; 56 [+;*
else if(temp[i1] data[cur]=temp[i1++]; 6H'W]T&
else \I+#M-V
data[cur]=temp[i2++]; =PAsyj
} q:vc;y
} W`gzMx
fZ[uNe[|
} k#DMd9
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改进后的归并排序: _,bDv`>Ra
C<yjGtVD
package org.rut.util.algorithm.support; G^&P'*
b 67l\L
import org.rut.util.algorithm.SortUtil; cu )w6!f
wq =Ef
/** .ovG_O
* @author treeroot "?r_A*U
* @since 2006-2-2 \?~cJMN
* @version 1.0 Xcw6mpLt
*/ NGL,j\(~7
public class ImprovedMergeSort implements SortUtil.Sort { @*^%^ P
`FHKQS5
private static final int THRESHOLD = 10; ?my2dd,|
)=5,S~IT
/* )m<CmYr2
* (non-Javadoc) =)IV^6~b
* DtglPo_(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -a`PW
*/ H}PZJf_E
public void sort(int[] data) { lqZUU92;
int[] temp=new int[data.length]; wHE1Jqpo
mergeSort(data,temp,0,data.length-1); eiJ~1HX)
} {jOV8SVL
DTo P|P
private void mergeSort(int[] data, int[] temp, int l, int r) { <Oihwr@5<
int i, j, k; I'e`?H t
int mid = (l + r) / 2; %shCqS
if (l == r) D]NJ^.X
return; k4+Q$3"
if ((mid - l) >= THRESHOLD) Ux+UcBKm-
mergeSort(data, temp, l, mid); aU?HIIA
else &\L\n}i-
insertSort(data, l, mid - l + 1); Bh5z4
if ((r - mid) > THRESHOLD) 2f0qfF
mergeSort(data, temp, mid + 1, r); HJ0Rcw%
else (Q F-=o
insertSort(data, mid + 1, r - mid); A#Ne07d
?4H>1Wkb
for (i = l; i <= mid; i++) { K %.>o
temp = data; XkEE55#>|
} jSdW?IH
for (j = 1; j <= r - mid; j++) { 3F?_{A
temp[r - j + 1] = data[j + mid]; !~fy".|x
} M+GtUE~"
int a = temp[l]; F42?h:y8I
int b = temp[r]; QQ\\:]iM
for (i = l, j = r, k = l; k <= r; k++) { k<QZ_*x}G
if (a < b) { f?W"^6Df
data[k] = temp[i++]; 5KC Zg'h
a = temp; *_H^]wNJG
} else { aK?PK }@
data[k] = temp[j--]; $*c!9Etl4
b = temp[j]; @BoZZ
} $VnPs!a
} .kp3<.
} Kdr}7#c
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/** ;fxrOfb
* @param data i<-a-Z+^
* @param l 4;V;8a\A
* @param i NEW0dF&)
*/ O6$n VpD3
private void insertSort(int[] data, int start, int len) { t-?#x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w" ,ab j
} 8T}Dn\f
} h)h%y)1
} ra}t#Xt`
} Q=h37]U+
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堆排序： h^"OC$
4 g^oy^~
package org.rut.util.algorithm.support; Qz/1^xy
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import org.rut.util.algorithm.SortUtil; ;]Bkw6o
`@|Kx\y4=j
/** ?AJE*=b
* @author treeroot 0^rDf L
* @since 2006-2-2 QAh6!<.;@
* @version 1.0 6,;7iA]
*/ FrryZe=
public class HeapSort implements SortUtil.Sort{ @^kt[$X;
KN9e""
/* (non-Javadoc) Acib<Mi2!-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5 MD=o7O^
*/ p-o!K\o-1
public void sort(int[] data) { L5yv}:.U
MaxHeap h=new MaxHeap(); C|Vz `FY
h.init(data); o2M4?}TpIV
for(int i=0;i h.remove(); Y:}!W
System.arraycopy(h.queue,1,data,0,data.length); \@HsMV2+zN
} )$e_CJ}9e
7cJh^M
private static class MaxHeap{ w(Hio-l=
42mZ.,<
void init(int[] data){ uKocEWB=/F
this.queue=new int[data.length+1]; H '(Ky
for(int i=0;i queue[++size]=data; Bys_8x}
fixUp(size); @fxDe[J:
} @Iy&Qo
} ;v^1V+1:z
J 4OgV?
private int size=0; ,a/<t"
Cn>RUGoUsI
private int[] queue; D#G(&<Q
Lcpz(W^
public int get() { Xi!`+N4
return queue[1]; G(1y_t
} R s)Nz< d
dLnMd0
public void remove() { 9!sR}
SortUtil.swap(queue,1,size--); Ki:.^
fixDown(1); ,HE +|y#
} 5b^`M
file://fixdown mlD 1 o
private void fixDown(int k) { d=_Wgz,d
int j; 9xm'0 '
while ((j = k << 1) <= size) { d2e4=/A%
if (j < size %26amp;%26amp; queue[j] j++; Zr.6J*&!
if (queue[k]>queue[j]) file://不用交换 `upxM0gc
break; <..|:0Q&~
SortUtil.swap(queue,j,k); 1v^eXvY
k = j; \E<t'\>@X
} [10;Mg
} Iq[Z5k(K
private void fixUp(int k) { 1]<wZV}.
while (k > 1) { `vFYeN;
int j = k >> 1; gP?uLnzvi
if (queue[j]>queue[k]) )W& $FU4JK
break; 1ZF>e`t8
SortUtil.swap(queue,j,k); &_N$S2
k = j; mt(2HBNoz
} PHh&@:
} :"oQ _bLT
xi =\]
} (;@\gRL
E5J2=xVW#
} BL^8gtdn
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SortUtil： c$>$2[*=
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package org.rut.util.algorithm; ,y57tY
jw"]U jub
import org.rut.util.algorithm.support.BubbleSort; 3 O)^Hq+9
import org.rut.util.algorithm.support.HeapSort; nBA0LIb
import org.rut.util.algorithm.support.ImprovedMergeSort; ?{ 0MF
import org.rut.util.algorithm.support.ImprovedQuickSort; {yPiBu
import org.rut.util.algorithm.support.InsertSort; /=bg(?nX
import org.rut.util.algorithm.support.MergeSort; CI )89`
import org.rut.util.algorithm.support.QuickSort; k7gm)}RKcu
import org.rut.util.algorithm.support.SelectionSort; DJmT]Q]o)
import org.rut.util.algorithm.support.ShellSort; 0cwb^ffN
9a*}&fL[
/** @N-P[.qL"
* @author treeroot ^<}eONa
* @since 2006-2-2 /M1 /
* @version 1.0 NJ;D Qv
*/ u`]J]gE
public class SortUtil { 7O,y%NWaK
public final static int INSERT = 1; }RvP*i
public final static int BUBBLE = 2; oe8sixZ[
public final static int SELECTION = 3; L/VlmN_v>s
public final static int SHELL = 4; $C;)Tlh
public final static int QUICK = 5; dSkW[r9Z%l
public final static int IMPROVED_QUICK = 6; E?z~)0z2`
public final static int MERGE = 7; ^atX/
public final static int IMPROVED_MERGE = 8; cN5,\I.
public final static int HEAP = 9; !A\Qwg>
\MA4>
public static void sort(int[] data) { $bd&$@sA
sort(data, IMPROVED_QUICK); azxGUS_i<
} #Wz7ju;
private static String[] name={ w)hH8jx{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8"zFTP*;u
}; d,_Ky#K5b
n!r<\4I
private static Sort[] impl=new Sort[]{ _U"9#<
new InsertSort(), Whd2mKwiO
new BubbleSort(), H7xyK
new SelectionSort(), $#k8xb
new ShellSort(), /8(\AuDT
new QuickSort(), QyGTm"9l
new ImprovedQuickSort(), GYX/G>-r
new MergeSort(), mct$.{~
new ImprovedMergeSort(), oA;sP'
new HeapSort() O{^ET:K@
}; k-$5H~(PZ
LtxeT.
public static String toString(int algorithm){ vt`V<3
return name[algorithm-1]; cF[L6{Oe
} FC:+[.fi
R*l#[D5A
public static void sort(int[] data, int algorithm) { 3:XF7T
impl[algorithm-1].sort(data); 7ktSj}7W]
} JYt)4mOo
Vg6/1I
public static interface Sort { K|q5s]4I
public void sort(int[] data); 0.9%m7.m
} i58&o@.H<u
VuOZZ7y
public static void swap(int[] data, int i, int j) { =peodj^
int temp = data; fr\"MP
data = data[j]; H}R/_5g
data[j] = temp; fq@r6\TI
} :/c40:[
} ZB)`*z>*