[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; hR(\%p
} Y,n&g45m
int i1=l; E9<oA.
int i2=mid+1; 5bBY[qp
for(int cur=l;cur<=r;cur++){ epXvk &
if(i1==mid+1) _<}oBh
data[cur]=temp[i2++]; O4t0 VL$
else if(i2>r) lsq\CavbM
data[cur]=temp[i1++]; > &tmdE
else if(temp[i1] data[cur]=temp[i1++]; (.^KuXd
else 21_sg f?
data[cur]=temp[i2++]; &!N9.e:-]
} %0&59q]LM
} ~T">)Y~+xI
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} OXDEU.
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改进后的归并排序: r^zra|]
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package org.rut.util.algorithm.support; `8M{13fv
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import org.rut.util.algorithm.SortUtil; a!guZUg6
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/** &Zy%Zz
* @author treeroot ]?c9;U
* @since 2006-2-2 @KJ~M3d0l
* @version 1.0 "d"6.ND
*/ cb82k[L6
public class ImprovedMergeSort implements SortUtil.Sort { 46[k9T
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private static final int THRESHOLD = 10; q!f'?yFYK
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/* a1#",%{I
* (non-Javadoc) wjy<{I
* ]Ub"NLYV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) grVPu! B;
*/ -RI&uFqOI
public void sort(int[] data) { :yxP3e%rp
int[] temp=new int[data.length]; 4m1@lnjp
mergeSort(data,temp,0,data.length-1); OJ?U."Lxm$
} N.'-9hv
9KCeKT>v
private void mergeSort(int[] data, int[] temp, int l, int r) { sU7fVke1
int i, j, k; _kEU=)Xe
int mid = (l + r) / 2; me@k~!e"z
if (l == r) :6TLT-B
return; [[s^rC<d
if ((mid - l) >= THRESHOLD) ,eSII2,r4
mergeSort(data, temp, l, mid); ,,8'29yEq
else bt'lT
insertSort(data, l, mid - l + 1); tZ>'tE
if ((r - mid) > THRESHOLD) {c}n."`
mergeSort(data, temp, mid + 1, r); '+&!;Jj,
else f1AO<>I;
insertSort(data, mid + 1, r - mid); VPvQ]}g6k
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for (i = l; i <= mid; i++) { W#9A6ir>
temp = data; j6GR-WQ]t
} gY {/)"
for (j = 1; j <= r - mid; j++) { %6Y\4Fe
temp[r - j + 1] = data[j + mid]; EG!Nsb^,
} P" aw--f(
int a = temp[l]; R+# g_"1@p
int b = temp[r]; /lLG|aAe
for (i = l, j = r, k = l; k <= r; k++) { }6To(*
if (a < b) { \2Yo*jE}
data[k] = temp[i++]; /_Fi4wZ
a = temp; L"L a|
} else { Ri/D>[
data[k] = temp[j--]; t vp kc;
b = temp[j]; \SooIEl@
} ~? n)/i("
} ZMEYF!jN
} uQl=?085
| MXRNA~
/** obK6GG?ZE
* @param data W]5sqtF;6
* @param l V!f' O@p[
* @param i 42Cc`a%U
*/ Ubv_a
private void insertSort(int[] data, int start, int len) { 7 V=%&+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6'|NALW
} iza.' Mm~
} FTh/1"a
} /t04}+,e^
} l(3\ekU!
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堆排序： CTZ#QiNP
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package org.rut.util.algorithm.support; x8Nij:K#
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import org.rut.util.algorithm.SortUtil; -^,wQW:o)
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/** y^:6D(SR
* @author treeroot W;T(q~XK
* @since 2006-2-2 ?mh0^G
* @version 1.0 M5{vYk>,1Q
*/ SXRND;-W8
public class HeapSort implements SortUtil.Sort{ wV"C ,*V
^20x\K
/* (non-Javadoc) #1[Q?e4,0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M(.]?+
*/ ;f[@zo><r
public void sort(int[] data) { H8$";T(I
MaxHeap h=new MaxHeap(); |"Fm<
h.init(data); QD^"cPC)mM
for(int i=0;i h.remove(); t_iZ\_8
System.arraycopy(h.queue,1,data,0,data.length); W C3b_ia
} sx][X itR+
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private static class MaxHeap{ '?b.t2
9F|e.
void init(int[] data){ l 5z8]/
this.queue=new int[data.length+1]; "yPKdwP
for(int i=0;i queue[++size]=data; du^r EMb%
fixUp(size); l]mn4cn3
} aR0v qRF
} )}SiM{g
3L%g2`
private int size=0; b*o,re)Dj
jAOD&@z1
private int[] queue; 1~9AQ[]w8
;aUI3n%
public int get() { mG+hLRTXP
return queue[1]; l&m'?.gf
} "dBCS
4W+%`x_U]
public void remove() { +( V+XT
SortUtil.swap(queue,1,size--); cP[]\r+Kj
fixDown(1); }$1Aw%p^
} Gq^#.o]
file://fixdown x^JjoI2vf
private void fixDown(int k) { 'W|@d8}h
int j; -I{J]L$S#
while ((j = k << 1) <= size) { U4,hEnJBT
if (j < size %26amp;%26amp; queue[j] j++; C6wlRvWn
if (queue[k]>queue[j]) file://不用交换 -~imxPmZ
break; Y^CbpG&-vC
SortUtil.swap(queue,j,k); p$&6E\#7
k = j; k<\]={|=
} 7x:j4
} Y$6W~j
private void fixUp(int k) { O7\)C]A
while (k > 1) { 0 ;ov^]
int j = k >> 1; LdYaJh~h
if (queue[j]>queue[k]) |h65[9DMP
break; -}r(75C
SortUtil.swap(queue,j,k); YK|Y^TU^
k = j; sYY=MD
} od~`q4p1(-
} js8\"
7<c&)No;
} S~4HFNe^&
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} <jRs/?1R
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SortUtil： ]qk/V:H:
44kb
package org.rut.util.algorithm; P1mPC
r.;(Kx/M
import org.rut.util.algorithm.support.BubbleSort; 8yc?9&/|
import org.rut.util.algorithm.support.HeapSort; zVs|go>F
import org.rut.util.algorithm.support.ImprovedMergeSort; aXefi'!6
import org.rut.util.algorithm.support.ImprovedQuickSort; QZ54Osdl
import org.rut.util.algorithm.support.InsertSort; wuTCdBu6hU
import org.rut.util.algorithm.support.MergeSort; iiZK^/P$
import org.rut.util.algorithm.support.QuickSort; Q{Lsr,
import org.rut.util.algorithm.support.SelectionSort; IRQ3>4hI
import org.rut.util.algorithm.support.ShellSort; u3H2\<
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/** DeTZl+qm1E
* @author treeroot SAGLLk07G
* @since 2006-2-2 8M;G@ Q80
* @version 1.0 |_;Vb
*/ 0\y@etb:mf
public class SortUtil { c{t[iXDG
public final static int INSERT = 1; _A.?:'-
public final static int BUBBLE = 2; U"v}br-kb
public final static int SELECTION = 3; N:@C% UW}
public final static int SHELL = 4; E0*'AZi&
public final static int QUICK = 5; 4r [Tpb
public final static int IMPROVED_QUICK = 6; <ST#< $%
public final static int MERGE = 7; k&P_ c
public final static int IMPROVED_MERGE = 8; <~Tlx:
public final static int HEAP = 9; S Yvifgp
V F'! OPN
public static void sort(int[] data) { hOx">yki
sort(data, IMPROVED_QUICK); 3f:I<S7
} U;:,$]+
private static String[] name={ +xlxhF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~4iIG}Y<
}; Th%1eLQ
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private static Sort[] impl=new Sort[]{ 0R2 AhA#
new InsertSort(), 0Fh*8a}?b
new BubbleSort(), 3EcmNwr
new SelectionSort(), SJ-g2aAT
new ShellSort(), hoihdVjv
new QuickSort(), 97Qng*i
new ImprovedQuickSort(), Sn/~R|3XA7
new MergeSort(), GJItGq`)
new ImprovedMergeSort(), (r.{v@h,dV
new HeapSort() v;;X2 a1k
}; puv*p%E
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public static String toString(int algorithm){ >M^ 1m(
return name[algorithm-1]; [lA[wCw
} 8P!dk5,,O
Sh]x`3 ).
public static void sort(int[] data, int algorithm) { fwRlqfi
impl[algorithm-1].sort(data); L/GM~*Xp(O
} <P5;8
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public static interface Sort { t{>66jm\R
public void sort(int[] data); c+G: bb%p
} 685o1c|
IR%a+;Xs
public static void swap(int[] data, int i, int j) { 9kP!O_
int temp = data; vmOXB#7W
data = data[j]; 9,'5~+7
data[j] = temp; *<U&DOYV:
} EBM\p+x&
} 64\ZOG\,