[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; \)N9aV
} RDi]2
int i1=l; t;Sb/3
int i2=mid+1; *uf'zQ<9
for(int cur=l;cur<=r;cur++){ Ad8n<zt|
if(i1==mid+1) jDfC=a])
data[cur]=temp[i2++]; y/{fX(aV
else if(i2>r) .-c4wm}
data[cur]=temp[i1++]; g"DG]/ev
else if(temp[i1] data[cur]=temp[i1++]; /QWvW=F2<
else !8d{q)JZ
data[cur]=temp[i2++]; =,=A,kI[;
} xb~yM%*c
} )e+>w=t
mbxZL<ua
} '&tG?gb&
b\kdKVh&
改进后的归并排序: XbKYiy
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package org.rut.util.algorithm.support; u(>^3PJ+
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import org.rut.util.algorithm.SortUtil; Vpz\.]
kR-SE5`Jk
/** QUc= &5 %
* @author treeroot i{NzV
* @since 2006-2-2 4{U T!WIi
* @version 1.0 X::JV7hu
*/ feDlH[$
public class ImprovedMergeSort implements SortUtil.Sort { H?vdr:WlTN
x.!V^HQSN
private static final int THRESHOLD = 10; P6-s0]-g
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/* qFCOUl
* (non-Javadoc) |`2RShu
* ?W?c1>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qs6]-
*/ x_N'TjS^{
public void sort(int[] data) { i(%W_d!
int[] temp=new int[data.length]; d9fC<Tp
mergeSort(data,temp,0,data.length-1); WYm\)@
} r1`x=r
;;OAQ`
private void mergeSort(int[] data, int[] temp, int l, int r) { {tuYs:
int i, j, k; _ @NL;w:!
int mid = (l + r) / 2; NdA[C|_8}f
if (l == r) a od-3"7[
return; r[`9uVT/
if ((mid - l) >= THRESHOLD) u"cV%(#
mergeSort(data, temp, l, mid); C\Wmq [
else Ha0M)0Anv
insertSort(data, l, mid - l + 1); *SbMqASv4G
if ((r - mid) > THRESHOLD) ,GbR!j@6
mergeSort(data, temp, mid + 1, r); ,F8Yn5h
else ]b:Lo
insertSort(data, mid + 1, r - mid); Ct<udO
|PCm01NU!
for (i = l; i <= mid; i++) { by1<[$8r
temp = data; z1 |TC
} ?4#Li~q
for (j = 1; j <= r - mid; j++) { F3[T.sf
temp[r - j + 1] = data[j + mid]; rK6l8)o
} YNyk1cE
int a = temp[l]; 5,lEx1{_
int b = temp[r]; ?|\ER#z
for (i = l, j = r, k = l; k <= r; k++) { T9E+\D
if (a < b) { r,8 [O
data[k] = temp[i++]; bivuqKA
a = temp; $Ps|HN
} else { k<nZ+! M
data[k] = temp[j--]; b;B%q$sntC
b = temp[j]; YlJ@XpKM
} Gi|w}j_
} Fc)@,/R"v
} R6<X%*&%
FJGlP&v<
/** T[w]o}>cW
* @param data hn7# L
* @param l !3c\NbU
* @param i L^/5ux
*/ u OmtyX
private void insertSort(int[] data, int start, int len) { ) yi E@ X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /Vx7mF:
} \"w"$9o6
} Y!aSs3c
} *2>&"B09`
} 8rAg\H3E
3V+] 9;
堆排序： rQ{7j!Im
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package org.rut.util.algorithm.support; b"<liGh"n-
xk9%F?)
import org.rut.util.algorithm.SortUtil; ^lnK$i
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/** U#7#aeI
* @author treeroot y;m|
* @since 2006-2-2 '|6]_
* @version 1.0 ANAVn@ [
*/ Ljm[?*H#
public class HeapSort implements SortUtil.Sort{ #ZUI)9My@
gMi0FO'
/* (non-Javadoc) `f,/`''R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (U DnsF
*/ P1.[
public void sort(int[] data) { @o].He@L<j
MaxHeap h=new MaxHeap(); o"s)eh
h.init(data); <)C#_w)-
for(int i=0;i h.remove(); }?$F}s-
System.arraycopy(h.queue,1,data,0,data.length); JMCKcZ%N
} S3C]AhW;
>>4qJ%bL
private static class MaxHeap{ @W.S6;GA\
L8@f-Kk
void init(int[] data){ lf`{zc r:
this.queue=new int[data.length+1]; udK%>
for(int i=0;i queue[++size]=data; i'<[DjMDlm
fixUp(size); pHGYQ;:L
} q_:4w$>
} SBu"3ym
+uF>2b6'
private int size=0; TIqtF&@o4
)EPjAv
private int[] queue; l K{hVqpt
.|KyNBn
public int get() { soB,j3#p'*
return queue[1]; |w~nVRb
} b}$+H/V
fCd&D
public void remove() { zy?|ODM
SortUtil.swap(queue,1,size--); V;VHv=9`o
fixDown(1); f].h^~.q
} )th<,Lo3#
file://fixdown KJUH(]>F
private void fixDown(int k) { tPWLg),
int j; <18(
while ((j = k << 1) <= size) { ,$L4dF3
if (j < size %26amp;%26amp; queue[j] j++; ^rR1ZVY
if (queue[k]>queue[j]) file://不用交换 h]&GLb&<?
break; :wyno#8`-
SortUtil.swap(queue,j,k); a#(?P.6
k = j; IZ-1c1
} Jl8H|<g~/
} dh\'<|\K
private void fixUp(int k) { 8P\G}
while (k > 1) { m]0;"jeL
int j = k >> 1; pZ{+c
if (queue[j]>queue[k]) #powub
break; yx8z4*]kH
SortUtil.swap(queue,j,k); ;\dBfP
k = j; :A_@,Q
} ./Zk`-OBT
} l~q\3UKlt
T@B/xAq5!
} ,.8KN<A2]'
H [\o RId
} oUlY?x1
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SortUtil： N7zft
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package org.rut.util.algorithm; 3,3N^nSD
',@3>T**
import org.rut.util.algorithm.support.BubbleSort; 1W LXM^4
import org.rut.util.algorithm.support.HeapSort; ifQ*,+@fxR
import org.rut.util.algorithm.support.ImprovedMergeSort; *I.f1lz%*
import org.rut.util.algorithm.support.ImprovedQuickSort; s WvBv
import org.rut.util.algorithm.support.InsertSort; s?}e^/"v
import org.rut.util.algorithm.support.MergeSort; dt]-,Y
import org.rut.util.algorithm.support.QuickSort; `5.'_3
import org.rut.util.algorithm.support.SelectionSort; Z]Cq3~l
import org.rut.util.algorithm.support.ShellSort; {$ JYw{a
3z?> j]
/** u'DRN,h+
* @author treeroot g-bK|6?yz
* @since 2006-2-2 lvz7#f L~
* @version 1.0 DV-d(@`K
*/ i$G@R%
public class SortUtil { E6ElNgL
public final static int INSERT = 1; LckK\`mh
public final static int BUBBLE = 2; =s2*H8]
public final static int SELECTION = 3; Qn.om=KDs@
public final static int SHELL = 4; ~Ea} /Au
public final static int QUICK = 5; ?P`K7
public final static int IMPROVED_QUICK = 6; 0&|\N ? 8_
public final static int MERGE = 7; g|yvF-+
public final static int IMPROVED_MERGE = 8; vJ[^K
public final static int HEAP = 9; '9J/T57]e
)23H1
public static void sort(int[] data) { }rw8PZ9
sort(data, IMPROVED_QUICK); x2\qXN/R
} kfY}S
private static String[] name={ K`zdc`/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |N7M^
}; zE9W8:7
xj;H&swo
private static Sort[] impl=new Sort[]{ Vaw+.sG`AP
new InsertSort(), *H2r@)Y[~
new BubbleSort(), 6}Ci>_i4#
new SelectionSort(), bJ {'<J
new ShellSort(), `0gyr(fES
new QuickSort(), L48_96
new ImprovedQuickSort(), rcG"o\g@+
new MergeSort(), ,Ah;A[%?~
new ImprovedMergeSort(), #gs`#6 ,'
new HeapSort() kv{za4,&
}; eJX9_6m-
>jLY"
public static String toString(int algorithm){ {ROVvs`
return name[algorithm-1]; `kXs;T6&
} +lcbi
Q\7h`d%)
public static void sort(int[] data, int algorithm) { Ka V8[|Gn,
impl[algorithm-1].sort(data); A]oV"`f
} p6Gy,C.
pO3SUOP
public static interface Sort { E4/Dr}4
public void sort(int[] data); v^*K:#<Q!
} qqY"*uJ'
U$A]8NZ$S
public static void swap(int[] data, int i, int j) { 0IBSRFt$g&
int temp = data; d^ 8ZeC#
data = data[j]; P}^W)@+3k
data[j] = temp; \X D6 pr@
} E*K;H8}s
} dkTX