[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; =k,?+h~
} l`uMtv/Wp
int i1=l; + )z5ai0m
int i2=mid+1; X|&H2y|*7
for(int cur=l;cur<=r;cur++){ YWJ$Pp
if(i1==mid+1) q<Qjc
data[cur]=temp[i2++]; irvd>^&jDC
else if(i2>r) \ueCbfV!Z4
data[cur]=temp[i1++]; Jd?qvE>Pp
else if(temp[i1] data[cur]=temp[i1++]; 59p'U/|
else IG7,-3
data[cur]=temp[i2++]; vxug>2
} =qbN?a/?2
} VFMn"bYOB
'p78^4'PL
} )Gk?x$pY@
vexF|'!}0#
改进后的归并排序: EZzR"W/
f*ABIm
package org.rut.util.algorithm.support; mU
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import org.rut.util.algorithm.SortUtil; cNN0-<#c
fUfd5W1"
/** aOd|;Z
* @author treeroot KJv%t_4'F
* @since 2006-2-2 !@wUARQ
* @version 1.0 {$5g29
*/ w{u,YM(Q
public class ImprovedMergeSort implements SortUtil.Sort { f$9|qfW'$
+>%51#2.Q
private static final int THRESHOLD = 10; J}+N\V~
V;^N:I\js
/* ?3qp?ea
* (non-Javadoc) >56fa6=3@
* WW+F9~S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XR3 dG:
*/ >I<}:=
public void sort(int[] data) { I3b*sx$
int[] temp=new int[data.length]; uMpuS1
mergeSort(data,temp,0,data.length-1); US=K}B=g
} K:kb&W
~kj96w4eAR
private void mergeSort(int[] data, int[] temp, int l, int r) { ?m+];SJk
int i, j, k; wjZ Q.T!
int mid = (l + r) / 2; Gy;Fe=
if (l == r) zGNW5S9G
return; mlLqQ<
if ((mid - l) >= THRESHOLD) 'n1$Y%t
mergeSort(data, temp, l, mid); .{ZJywE<
else J7C?Z
insertSort(data, l, mid - l + 1); HG< z,gE 2
if ((r - mid) > THRESHOLD) -T i<H9OV
mergeSort(data, temp, mid + 1, r); C9!FnvH
else `p1B58deC
insertSort(data, mid + 1, r - mid); k Jw Pd;%
tN_=&|{WE4
for (i = l; i <= mid; i++) { tIV{uVM[|D
temp = data; =tY%`e
} lkly2|wA
for (j = 1; j <= r - mid; j++) { BlZB8KI~
temp[r - j + 1] = data[j + mid]; ~c] q:pU2
} r[T(R9k
int a = temp[l]; _Pa@%/
int b = temp[r]; \jV2":[%c
for (i = l, j = r, k = l; k <= r; k++) { a(*"r:/lD
if (a < b) { )f8;ze
data[k] = temp[i++]; &j ;91wEn
a = temp; 7E#h(bt j
} else { ^i2>Ax&T
data[k] = temp[j--]; EVBOubV
b = temp[j]; :-<30LS$
} nqx0#_K-E
} 63_#*6Pv28
} Ayv:Pv@
V6_5v+n
/** );yZyWDV
* @param data nd,\<}uP9
* @param l Y<kz+d,C
* @param i W(Md0*
*/ :8`$BbV
private void insertSort(int[] data, int start, int len) { B u%%O8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t#8QyN
} ZMr[:,Jp
} EkRx/
} PC+Soh*
} ?Q+*[YEJ5
KKb7dZbt<
堆排序： zY@0R`{@p
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package org.rut.util.algorithm.support; GA` bWl
r..f$FF)\
import org.rut.util.algorithm.SortUtil; 9o6[4Q}
GUD]sXSj
/** D|<_96_m
* @author treeroot ZR%$f-
* @since 2006-2-2 /ueOc<[8"
* @version 1.0 (UhJ Pco"
*/ @8w5Oudvx
public class HeapSort implements SortUtil.Sort{ vJct)i
v@ qDR|?^
/* (non-Javadoc) =8TBkxG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;I80<SZ
*/ J>G'H)
public void sort(int[] data) { EAm31v C
MaxHeap h=new MaxHeap(); &OE-+z
h.init(data); P*>?/I`G
for(int i=0;i h.remove(); fVa z'R
System.arraycopy(h.queue,1,data,0,data.length); k h*WpX
} /*BK6hc
%Ie,J5g5
private static class MaxHeap{ ]q4LNo
ZREy I(_
void init(int[] data){ {Y=k`t,
this.queue=new int[data.length+1]; AZ^>osr
for(int i=0;i queue[++size]=data; qmGHuQVe
fixUp(size); AS:k&t
} f<$*,P
} ( xzruI5P
/.rj\,
private int size=0; ,3eN&
}.U(Gxu$
private int[] queue; OC-d5P
wu11)HFL|z
public int get() { uOKD#
return queue[1]; [McHl1a
} H^`J(J+
])bgUH
public void remove() { #Tag"b`
SortUtil.swap(queue,1,size--); f\=,_AQ
fixDown(1); ZAeJTCCk
} ]9'F<T= $_
file://fixdown v0(}"0
private void fixDown(int k) { VKu_l
int j; RhT:]
while ((j = k << 1) <= size) { =h=-&DSA
if (j < size %26amp;%26amp; queue[j] j++; `1Md1e:J
if (queue[k]>queue[j]) file://不用交换 sh0x<_
break; :RZ'_5P[If
SortUtil.swap(queue,j,k); "\rO}(gC;`
k = j; {M=B5-
} B-L@ 0gH
} Q>;Aq!mr=
private void fixUp(int k) { W>Pcj EI
while (k > 1) { 4T"L#o1
int j = k >> 1; r8N)]HsZH
if (queue[j]>queue[k]) Yt:%)&50}-
break; r3OtQ
SortUtil.swap(queue,j,k); `*yOc6i]
k = j; _Gb7n5p
} ,1!Y!,xy
} Wnp[8IEU
X|g5tnsj`
} qC& xuu|
4DP<)KX
} |a /cw"
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SortUtil： +!`$(
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package org.rut.util.algorithm; *!Gb_!98
;[g~h |{6
import org.rut.util.algorithm.support.BubbleSort; A,4} $-7
import org.rut.util.algorithm.support.HeapSort; =z<sx2#*
import org.rut.util.algorithm.support.ImprovedMergeSort; `'mRGz7t
import org.rut.util.algorithm.support.ImprovedQuickSort; XgKYL<k?S
import org.rut.util.algorithm.support.InsertSort; DIvxut
import org.rut.util.algorithm.support.MergeSort; ?vF8 y;Jh
import org.rut.util.algorithm.support.QuickSort; (r'NB
import org.rut.util.algorithm.support.SelectionSort; )PkGT~3I
import org.rut.util.algorithm.support.ShellSort; )[&j&AI
Dk")/ ib
/** jE5=e</
* @author treeroot nSZp,?^
* @since 2006-2-2 Kuk@x.~0m
* @version 1.0 yTe25l{QaF
*/ fHI@' '0
public class SortUtil { =M4wP3V/
public final static int INSERT = 1; K&dc< 4DC
public final static int BUBBLE = 2; ,y/m5-D!
public final static int SELECTION = 3; &@2`_%QtA
public final static int SHELL = 4; @Y(7n/*
public final static int QUICK = 5; ]^a{?2ei
public final static int IMPROVED_QUICK = 6; KO}TCa
public final static int MERGE = 7; *l0i}"T^_
public final static int IMPROVED_MERGE = 8; GIR12%-EO
public final static int HEAP = 9; 1.~^QH\p?3
.>y3`,0h
public static void sort(int[] data) { +_f813$C
sort(data, IMPROVED_QUICK); Bv%dy[I
} 5$$]ZMof
private static String[] name={ A9[D.W9>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cj[%.M5iBA
}; H66~!J0;a
?iaO6HD
private static Sort[] impl=new Sort[]{ Na.e1A&?j
new InsertSort(), uIJ zz4
new BubbleSort(), aKRnj!4z
new SelectionSort(), Pb@$RAU63
new ShellSort(), ;D[I/U
new QuickSort(), (t,|FkVLV
new ImprovedQuickSort(), $uK[[k~=S
new MergeSort(), E`iE]O
new ImprovedMergeSort(), lx82:_
new HeapSort() y] $-:^
}; ,qdZ6bv,]|
H a`V"X{}
public static String toString(int algorithm){ XR#?gx.}
return name[algorithm-1]; ty9(mtH+
} aprgThoD
@XKVdtG
public static void sort(int[] data, int algorithm) { 3);Wgh6
impl[algorithm-1].sort(data); 'w\Gd7E
} f_QZql
+gb"} cN
public static interface Sort { {?IUf~<
public void sort(int[] data); 5*$z4O:Aa
} ZQ#AEVI,
E `%*lGu_
public static void swap(int[] data, int i, int j) { "fd'~e$S#
int temp = data; 6b4]dvl_
data = data[j]; j2%#xZ{33
data[j] = temp; ]jP0Z#
} v #Q(g/^
} B :1r;8{j