[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; :Y-{Kn6`_
} >82@Q^O
int i1=l; :s=NUw_^
int i2=mid+1; 832v"kCD
for(int cur=l;cur<=r;cur++){ 6Vww;1J
if(i1==mid+1) tM2)k+fg
data[cur]=temp[i2++]; J5*tJoCYS
else if(i2>r) 2<li7c59
data[cur]=temp[i1++]; XttqOf
else if(temp[i1] data[cur]=temp[i1++]; SH3|sXH<
else UYFwS/ RW}
data[cur]=temp[i2++]; uB |Ss
} s~X+*@.
} W>!_|[a
o5xAav"+>
} `J]fcE%T0R
^ K|;~}P
改进后的归并排序: NxSu3e~PS
u?>B)PW
package org.rut.util.algorithm.support; zs%Hb48V
h H <J,Wn
import org.rut.util.algorithm.SortUtil; Z -,J)gW
M@h|bN
/** ~i@Y|38C
* @author treeroot -yR.<KnL
* @since 2006-2-2 rX*H)3F
* @version 1.0 ?in|qevL
*/ 'jmTXWq*
public class ImprovedMergeSort implements SortUtil.Sort { jxiC Kx,G
6Z#\CixG
private static final int THRESHOLD = 10; >*@y8u*
$=5=NuX
/* yvgrIdEP
* (non-Javadoc) IC6gU$e
* GQ*wc?f3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DvPlV q~
*/ ex+\nD>t4
public void sort(int[] data) { Ad:TYpLD
int[] temp=new int[data.length]; cHcmgW\4
mergeSort(data,temp,0,data.length-1); KQ`qpX^d
} \|]Z8t7
cUqke+!
private void mergeSort(int[] data, int[] temp, int l, int r) { kxp);
int i, j, k; fq5_G~c=
int mid = (l + r) / 2; z>jUR,!GT
if (l == r) T|6jGZS^|W
return; Glxuz0]
if ((mid - l) >= THRESHOLD) ;l&4V
mergeSort(data, temp, l, mid); w$H^q !(
else SF}<{x_
insertSort(data, l, mid - l + 1); .~Fp)O:!
if ((r - mid) > THRESHOLD) RaWG w
mergeSort(data, temp, mid + 1, r); _$wmI/_JM
else &ZghMq~
insertSort(data, mid + 1, r - mid); AtU v71D:
xY+VyOUs
for (i = l; i <= mid; i++) { &LF` W
temp = data; UbEb&9}
} fMGbODAvY
for (j = 1; j <= r - mid; j++) { %ObLWH'
temp[r - j + 1] = data[j + mid]; nl(WJKq'
} 'xhcuVl
int a = temp[l]; 56e r`=ms
int b = temp[r]; S-7'it!1
for (i = l, j = r, k = l; k <= r; k++) { D?C)BcN
if (a < b) { Oy<5>2^P
data[k] = temp[i++]; '"?C4mbSl
a = temp; >$ NDv
} else { aFe`_cnG
data[k] = temp[j--]; fLSXPvm
b = temp[j]; {r>.G7P6
} p8kr/uMP ;
} ZunCKc
} ]W Zq^'q.
! iptT(2
/** V?P,&c?84
* @param data i^_#%L
* @param l GK9/D|h4
* @param i /,MJq#@K
*/ iT;@bp
private void insertSort(int[] data, int start, int len) { 2:BF[c`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `}m Q
} ~`GhS<D
} l"q1?kaVg
} [F_/2+e
} Ul_M3"Z
:LWn<,4F&
堆排序： hY*0aZ|(
%*o8L6Hn
package org.rut.util.algorithm.support; kW`r=u
0x11 vr!
import org.rut.util.algorithm.SortUtil; TDg@Tg0
zOHypazOTq
/** 6oinidB[l
* @author treeroot ~XydQJ^*
* @since 2006-2-2 y8s!M
* @version 1.0 0l=+$&D
*/ hKNY+S})g
public class HeapSort implements SortUtil.Sort{ 3IR ^
>#}2J[2HQ
/* (non-Javadoc) hH->%*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C{Asp
*/ ]WUC:6x
public void sort(int[] data) { T"T;`y@(
MaxHeap h=new MaxHeap(); 0G <hn8>
h.init(data); KECElK3uj
for(int i=0;i h.remove(); wQ+dJ3b$
System.arraycopy(h.queue,1,data,0,data.length); `_5GG3@Ff
} 'r} zY-FM`
GIftrYr
private static class MaxHeap{ #fs|BV !
=s}Xy_+:
void init(int[] data){ >Z Ke
this.queue=new int[data.length+1]; xMs]Hs
for(int i=0;i queue[++size]=data; [4+q+
fixUp(size); ?$z.K>S5
} DjCx~@
} maSgRf[g
~%ozgzr^
private int size=0; `@`1pOb
G{x[uE2X&f
private int[] queue; V5D2\n3A
y69J%/c ra
public int get() { PT9v*3Bq~
return queue[1]; "Vd_CO
} =l942p
-Dzsa
public void remove() { MR'o{?{e`
SortUtil.swap(queue,1,size--); x.$1<w64t
fixDown(1); 1;| LI?
} uH\kQ9f
file://fixdown %do1i W
private void fixDown(int k) { |@j_2Q,
int j; r;iV$Rq!
while ((j = k << 1) <= size) { Wv K(G3
if (j < size %26amp;%26amp; queue[j] j++; $_j1kx$
if (queue[k]>queue[j]) file://不用交换 uCzii o`S
break; {<w +3Va
SortUtil.swap(queue,j,k); vz`@x45K
k = j; h ?#@~
} dEp/dd~(&
} 6J%iZ
private void fixUp(int k) { ])y{BlZ
while (k > 1) { q42FPq
int j = k >> 1; *j*Du+
if (queue[j]>queue[k]) ;vO@m!h}U
break; 3vJ12=
SortUtil.swap(queue,j,k); K5ZnS`c;
k = j; cfoYnM
} ;Gm>O7"|@
} K6pw8
"D> ]ES%5
} V,QwN&
a&/HSf_G
} x3p9GAd#
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SortUtil： & 5 <**
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package org.rut.util.algorithm; mf*Nr0L;J
/)1v9<vM"
import org.rut.util.algorithm.support.BubbleSort; ySruAkw%
import org.rut.util.algorithm.support.HeapSort; ;9rTE|n
import org.rut.util.algorithm.support.ImprovedMergeSort; B1w0cS%%:
import org.rut.util.algorithm.support.ImprovedQuickSort; ~%aJFs
import org.rut.util.algorithm.support.InsertSort; O@`J_9
import org.rut.util.algorithm.support.MergeSort; 7,_-XV2
import org.rut.util.algorithm.support.QuickSort; \8_V(lU
import org.rut.util.algorithm.support.SelectionSort; J'7 y
import org.rut.util.algorithm.support.ShellSort; Pe,;MP\2
T0L+z/N_m.
/** 0_V*B[V
* @author treeroot ^_w*XV
* @since 2006-2-2 4]"w b5%
* @version 1.0 n2na9dX)w
*/ 0}-#b7eR
public class SortUtil { -><QFJ
public final static int INSERT = 1; ~|=rwDBZ8l
public final static int BUBBLE = 2; ]S]"`;Wh
public final static int SELECTION = 3; 1E^{B8cm
public final static int SHELL = 4; j&llrN
public final static int QUICK = 5; r03I*b
public final static int IMPROVED_QUICK = 6; v|y<_Ya
public final static int MERGE = 7; ris;Iu^v0
public final static int IMPROVED_MERGE = 8; j/`Up
public final static int HEAP = 9; 3#<'[TF00t
._K$0U!
public static void sort(int[] data) { bQ=s8'
sort(data, IMPROVED_QUICK); 4 f3=`[%
} |?|K\UF(Y
private static String[] name={ .='3bQ(UZ4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z-)*Q
}; 7Ff?Ysr
E.4n}s
private static Sort[] impl=new Sort[]{ o>$|SU!a
new InsertSort(), |Pj9ZG#
new BubbleSort(), I4CHfs"ar
new SelectionSort(), v?%0~!
new ShellSort(), Y"s )u7
new QuickSort(), t0I>5#*WU
new ImprovedQuickSort(), kYmo7
new MergeSort(), u& AQl.u
new ImprovedMergeSort(), D'85VZEFyo
new HeapSort() #Ul4&QVeg
}; >9(7h&[Y
B>ge, }{
public static String toString(int algorithm){ K]%N-F>r
return name[algorithm-1]; vx PDC~3;
} h<Jc;ht
%e(9-M4*
public static void sort(int[] data, int algorithm) { $:PF9pY(
impl[algorithm-1].sort(data); d"LoK,p#
} A-X
ef^Cc)S-Q
public static interface Sort { mQmBf|Rl
public void sort(int[] data); J&n ^y
} $hyqYp"/;
/0Rt+`
public static void swap(int[] data, int i, int j) { `WP@ZSC6
int temp = data; ],H1
data = data[j]; [0d-CEp[
data[j] = temp; %H 8A=
} 9k(*?!\;
} C+X)">/+L