[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; N6K%Wkz
} X 'D~#r
int i1=l; "9F]Wv/
int i2=mid+1; FyD^\6/x
for(int cur=l;cur<=r;cur++){ 6G2s^P1Dl@
if(i1==mid+1) bz5",8Mn
data[cur]=temp[i2++]; /tIR}qK
else if(i2>r) nADt8
data[cur]=temp[i1++]; 0zH^yx:ma
else if(temp[i1] data[cur]=temp[i1++]; '2)c;/-E
else DXX(qk)6
data[cur]=temp[i2++]; xW|^2k
} r*$$82s
} xX;@ BS
P(iZGOKUs=
} >6 p <n
~9#x/EG/
改进后的归并排序: 5gP<+S#>T
WKVoqp}
package org.rut.util.algorithm.support; zx)^!dEMM
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import org.rut.util.algorithm.SortUtil; m ,B,dqT
iV+'p->/
/** RSL%<
* @author treeroot Jt-s6-2
* @since 2006-2-2 W?+U%bIZ9
* @version 1.0 ?t;>]Wo;
*/ g7*"*%v 2
public class ImprovedMergeSort implements SortUtil.Sort { F\pw0^K;N
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private static final int THRESHOLD = 10; /JP]5M)
@q=l H *=
/* WY=RJe2
* (non-Javadoc) _PTo!aJL
* {8L)Fw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 31BN ?q
*/ 00DWXGt20o
public void sort(int[] data) { $#Mew:J
int[] temp=new int[data.length]; "v.]s;g
mergeSort(data,temp,0,data.length-1); P<+y%g(({
} {sn:Lj0
e[`E-br^
private void mergeSort(int[] data, int[] temp, int l, int r) { &uLxAw
int i, j, k; r 5$(
int mid = (l + r) / 2; 2m`4B_g A
if (l == r) c k~gB
return; >)Ih[0~M
if ((mid - l) >= THRESHOLD) ONx|c'0g
mergeSort(data, temp, l, mid); re.%$D@
else s3G\L<~mB
insertSort(data, l, mid - l + 1); = mnjIp
if ((r - mid) > THRESHOLD) m~K[+P
mergeSort(data, temp, mid + 1, r); HSt|Ua.c/h
else kBPFk t2
insertSort(data, mid + 1, r - mid); m7:E73:
&&1q@m,cP
for (i = l; i <= mid; i++) { Sr7+DCr
temp = data; !*46@sb:
} >.R6\>N%
for (j = 1; j <= r - mid; j++) { 9JF*xXd>Q
temp[r - j + 1] = data[j + mid]; ?$O5w*
} ":,HY)z
int a = temp[l]; o]NL_SM_
int b = temp[r]; +mBJvrI
for (i = l, j = r, k = l; k <= r; k++) { JOj\#!\>k0
if (a < b) { X,- ' v[z
data[k] = temp[i++]; Z=: oIAe
a = temp; JCIm*6~
} else { <`dF~
data[k] = temp[j--]; qZ!1>`B
b = temp[j]; \!UNale
} S"|sD|xOb
} m8rz i:
} h;vD"!gP
?Azpb}#
/** (vIrXF5Dnj
* @param data I3Sl>e(Z
* @param l ujcS>XN,1
* @param i `92 D]^g
*/ ArkFC
private void insertSort(int[] data, int start, int len) { "X']_:F1a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ow\9vf6H
} %EPqJ(T
} bw*@0;
} (l22p
} YQR*?/?a
RJs_ S
堆排序： (4V1%0
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package org.rut.util.algorithm.support; <!,q:[ee5
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import org.rut.util.algorithm.SortUtil; !DnG)4#
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/** *8p\.za1
* @author treeroot M3Kpp_d_!
* @since 2006-2-2 ErC~,5dj;n
* @version 1.0 Q}jbk9gM5
*/ f}4c#x
public class HeapSort implements SortUtil.Sort{ 'Rfvr7G/?
V>P\yr?
/* (non-Javadoc) f5a%/1?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /x_C
*/ @];#4O
public void sort(int[] data) { MW9B -x
MaxHeap h=new MaxHeap(); tYfhKJzGC
h.init(data); k?Jzy
for(int i=0;i h.remove(); hvBuQuk)
System.arraycopy(h.queue,1,data,0,data.length); -b@E@uAX/
} SX}GKu
AW'tZF"
private static class MaxHeap{ 6\86E$f=h
'OGOT0(
void init(int[] data){ PqcuSb6
this.queue=new int[data.length+1]; Tu_dkif'
for(int i=0;i queue[++size]=data; OxF\Hm)(
fixUp(size); pb%#`2"
} 3Gn2@`GC
} 9BANCW"
lGB7(
private int size=0; X_ >B7(k
^OG^% x"
private int[] queue; V`69%35*@
>1ZMQgCG
public int get() { cXJgdBwo
return queue[1]; jn\\,n"6
} IJ,,aCj4g
VhSKtD1
public void remove() { xSb/98;
SortUtil.swap(queue,1,size--); ~s^&*KaA
fixDown(1); 1,PFz
} fJv0 B*
file://fixdown %8o(x 0
private void fixDown(int k) { {yyg=AMz
int j; C>68$wd>
while ((j = k << 1) <= size) { Op3 IL/
if (j < size %26amp;%26amp; queue[j] j++; |ry;'[*
if (queue[k]>queue[j]) file://不用交换 U7crbj;c)d
break; any\}
SortUtil.swap(queue,j,k); B_cn[?M
k = j; W&06~dI1!
} _;01/V"q6
} Q,\lS
private void fixUp(int k) { KvilGh10
while (k > 1) { 8gC(N3/E"
int j = k >> 1; 6}NvVolr
if (queue[j]>queue[k]) GWE`'V
break; P>N\q
SortUtil.swap(queue,j,k); 6%S>~L66
k = j; ^ioTd
} uFdSD
} \((>i7C
^J% w[FE
} #UND'c(5
<2cq 0*$
} l}Xmm^@)
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SortUtil： xC;$/u%'
n;rOH[P
package org.rut.util.algorithm; F$ h/k^
McsqMI6
import org.rut.util.algorithm.support.BubbleSort; * n!0
import org.rut.util.algorithm.support.HeapSort; ^|sxbP
import org.rut.util.algorithm.support.ImprovedMergeSort; q=nMZVVlF(
import org.rut.util.algorithm.support.ImprovedQuickSort; ; wHuL\
import org.rut.util.algorithm.support.InsertSort; [z$J
import org.rut.util.algorithm.support.MergeSort; La9@h"
import org.rut.util.algorithm.support.QuickSort; 3al5Vu2:
import org.rut.util.algorithm.support.SelectionSort; j|aT`UH03
import org.rut.util.algorithm.support.ShellSort; }4 $EN
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/** tb=L+WAIw
* @author treeroot It_yh #s
* @since 2006-2-2 +H<%)Lk J
* @version 1.0 8=nm`7(]
*/ }p- %~Y
public class SortUtil { JAiV7v4&R
public final static int INSERT = 1; RmNF]"3%
public final static int BUBBLE = 2; vY;Lc
public final static int SELECTION = 3; JR<R8+@g_
public final static int SHELL = 4; PPq*_Cf
public final static int QUICK = 5; ptDA))7M/
public final static int IMPROVED_QUICK = 6; uk'<9g^
public final static int MERGE = 7; *E. 2R{
public final static int IMPROVED_MERGE = 8; e@,L~\
public final static int HEAP = 9; Fk9(FOFg
1$Hf`h2
public static void sort(int[] data) { c//W#V2Q
sort(data, IMPROVED_QUICK); &0C!P=-p
} }E1Eq
private static String[] name={ AT9SD vJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SQ1&n;M}f
}; X1'Ze,34
& {/u>,
private static Sort[] impl=new Sort[]{ 9=}/t9k
new InsertSort(), B+Bv(p
new BubbleSort(), 5g5pzww
new SelectionSort(), ut,"[+J
new ShellSort(), *|3z($*U]
new QuickSort(), p-6.:y
new ImprovedQuickSort(), 0ND7F
new MergeSort(), 6FmgK"t8
new ImprovedMergeSort(), Q$zlxn 7\
new HeapSort() :OZhEBL&b
}; KWH
k %rP*b*
public static String toString(int algorithm){ X5yhS
return name[algorithm-1]; 5.E 2fX
} a[!d)Y:zx
{2Ibd i
public static void sort(int[] data, int algorithm) { +]zP $5_e
impl[algorithm-1].sort(data); `->k7a0<b1
} w#$k$T)
od fu7P_
public static interface Sort { -XyuA:pxx
public void sort(int[] data); e+WVN5"ID>
} {ULnQ6@
K!~](_W!
public static void swap(int[] data, int i, int j) { 0Q9OQqg m
int temp = data; TK>}$.c%+
data = data[j]; E;Hjw0M'k
data[j] = temp; $F%?l\7j
} *X-$* ~J0
} ;CZcY] ol