[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; _<%\h?W$
} L* khj3;
int i1=l; qJX+[PJ
int i2=mid+1; %uz|NRB=
for(int cur=l;cur<=r;cur++){ AFINm%\/0
if(i1==mid+1) W7TXI~7
data[cur]=temp[i2++]; $h,&b<-
else if(i2>r) ;-9zMbte:
data[cur]=temp[i1++]; 8!uL-_Bn
else if(temp[i1] data[cur]=temp[i1++]; zr3q>]oma
else cZaF f?]k
data[cur]=temp[i2++]; @[5_C?2
} OK M\"A4
} O$"bd~X
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} 4V228>9w
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改进后的归并排序: oN[Fza>
tKG;k"wk
package org.rut.util.algorithm.support; "GwWu-GS
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import org.rut.util.algorithm.SortUtil; 7wiK.99
V~J*49t&2J
/** l$qStL*8O
* @author treeroot '0R/6Z|/Y
* @since 2006-2-2 .K|P&
* @version 1.0 q,;".3VQ
*/ W$JY M3!
public class ImprovedMergeSort implements SortUtil.Sort { u\()E|?p
Avs7(-L+s
private static final int THRESHOLD = 10; [}A_uOGEP
W+d9cM=
/* C(F1VS
* (non-Javadoc) 8/Et&TJ`
* uQ:ut(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *=$[}!YG
*/ iO%Zd[
public void sort(int[] data) { G *mO&:q
int[] temp=new int[data.length]; qa 6=W
mergeSort(data,temp,0,data.length-1); ^i{,z*vi
} ilDJwZg#
->&BcPLn
private void mergeSort(int[] data, int[] temp, int l, int r) { \#\`!L[1
int i, j, k; F* 3G_V
int mid = (l + r) / 2; TnN^2:cU
if (l == r) E1c>nrnh*
return; q4sl=`L5Sp
if ((mid - l) >= THRESHOLD) lSn5=^]q
mergeSort(data, temp, l, mid); ur/Oc24i1n
else 3E<aiGU
insertSort(data, l, mid - l + 1); y\F`B0#$
if ((r - mid) > THRESHOLD) O%YjWb
mergeSort(data, temp, mid + 1, r); @DfkGm[%
else (@%XWg
insertSort(data, mid + 1, r - mid); "C:rTIH
#joF{M{
for (i = l; i <= mid; i++) { 2UU2Vm_6
temp = data; +Fk4{p
} C+/Eqq^(
for (j = 1; j <= r - mid; j++) { NniX/fk
temp[r - j + 1] = data[j + mid]; 8`:M\*
} #2Ac
int a = temp[l]; H/^~<U#p
int b = temp[r]; _, \y2&KT
for (i = l, j = r, k = l; k <= r; k++) { f*{M3"$E
if (a < b) { <)_:NRjBF&
data[k] = temp[i++]; X!U]`Qh
a = temp; 6PiEa(
} else { McT\ R{/
data[k] = temp[j--]; ky'|Wk6
b = temp[j]; a<f;\$h]
} zo_k\K`{@
} ijvNmn1k
} MS{Hz,I,
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/** ^D9 /
* @param data -,R0IGS
* @param l nHI(V-E2:H
* @param i `[X6#`<
*/ rU; g0'4e
private void insertSort(int[] data, int start, int len) { 8'3"uv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bHO7*E
} :0nK`$'
} pt=7~+r
} AiY|O S3R
} ~J%R-{U9
L&:M8xiA~$
堆排序： |2qR^Hd&5
@ L\-ZWq
package org.rut.util.algorithm.support; ~@%(RMJm&
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import org.rut.util.algorithm.SortUtil; z8g=;><
btUq
/** ;rNd701p"
* @author treeroot `!zQ
* @since 2006-2-2 n)tU9@4Np
* @version 1.0 B:e.gtM5
*/ vAi"$e
public class HeapSort implements SortUtil.Sort{ vz6SCGg,
JR/W9i
/* (non-Javadoc) ktN%!Mh\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1pWk9Xuh
*/ t G]N*%@
public void sort(int[] data) { d0'7efC+
MaxHeap h=new MaxHeap(); HpW"lYW4
h.init(data); ]9fS@SHdx
for(int i=0;i h.remove(); 9Kc0&?q@D
System.arraycopy(h.queue,1,data,0,data.length); !K!)S^^Po?
} -_s%8l^
DD2adu^
private static class MaxHeap{ IS-}:~Pi
7Aqn[1{_O
void init(int[] data){ ,r@xPZPz:e
this.queue=new int[data.length+1]; ]t*33
for(int i=0;i queue[++size]=data; :b"=KQ
fixUp(size); M#ZT2~+CT
} M#`{>R|
} <sa #|Y$
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private int size=0; y*w"J3|29
:){)JZ}-95
private int[] queue; $?-7OXj<
QQ*gFP.Ao
public int get() { >Q&CgGpW$
return queue[1]; aXC!t
} c2/"KT
:*=Ns[Y
public void remove() { wqcDAO(
SortUtil.swap(queue,1,size--); [Uswf3
fixDown(1); nZ~kZ |VS
} ebzzzmwo
file://fixdown ?fB5t;~E
private void fixDown(int k) { #kj~G]QA
int j; !-7_ +v>
while ((j = k << 1) <= size) { NJk)z&M
if (j < size %26amp;%26amp; queue[j] j++; ;r3}g"D@
if (queue[k]>queue[j]) file://不用交换 Ha?G=X
break; H*GlWgfG
SortUtil.swap(queue,j,k); WXLK89ev\
k = j; <o2,HTWNPS
} I4ebkPgf
} DjY8nePyE
private void fixUp(int k) { C1tb`
while (k > 1) { UAdz-)$
int j = k >> 1; |4Qx=x>
if (queue[j]>queue[k]) p:Oz<P
break; -'j7SOGk
SortUtil.swap(queue,j,k); eap8*ONl
k = j; (nq^\ZdF
} _p0)vT
} f$vwuW
?HV}mS[t
} t-x[:i
zOL;"/R
} ;uK";we
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SortUtil： g@Ld"5$^2
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package org.rut.util.algorithm; 02(h={
BGN9,ii
import org.rut.util.algorithm.support.BubbleSort; G?R_aPP
import org.rut.util.algorithm.support.HeapSort; ,[Ag~.T
import org.rut.util.algorithm.support.ImprovedMergeSort; 1&|
import org.rut.util.algorithm.support.ImprovedQuickSort; P8<hvMF
import org.rut.util.algorithm.support.InsertSort; ~}K{e
import org.rut.util.algorithm.support.MergeSort; 5?w.rcN[j
import org.rut.util.algorithm.support.QuickSort; ;I+H>$%jZ
import org.rut.util.algorithm.support.SelectionSort; vTHq)C.7G
import org.rut.util.algorithm.support.ShellSort; !3@{U@*Z]
v$;@0t:;#
/** Je 31".
* @author treeroot Od-Ax+Hp
* @since 2006-2-2 WtVf wC_
* @version 1.0 fgmSgG"b
*/ 7k'gt/#up
public class SortUtil { &sdx`,
public final static int INSERT = 1; _KN: o10U
public final static int BUBBLE = 2; Ev{MCu1!6
public final static int SELECTION = 3; ] opto
public final static int SHELL = 4; &atyDFJ'
public final static int QUICK = 5; Q(e{~ ]*
public final static int IMPROVED_QUICK = 6; (xu=%
public final static int MERGE = 7; C B/r]+4
public final static int IMPROVED_MERGE = 8; eVx~n(m!}
public final static int HEAP = 9; Y.NE^Vn0
6A?8tm/0
public static void sort(int[] data) { $it@>L8
sort(data, IMPROVED_QUICK); !9D1 Fa
} p31oL{D
private static String[] name={ ws[/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7E\g &R.
}; T)~!mifX
-=a[J;'q
private static Sort[] impl=new Sort[]{ \E77SO,$
new InsertSort(), 5B?i(2&#
new BubbleSort(), Im+7<3Z
new SelectionSort(), T pD;
new ShellSort(), *{|$FQnR>(
new QuickSort(), oqYt/4^Q
new ImprovedQuickSort(), `7\H41%\pp
new MergeSort(), A?r^V2+j
new ImprovedMergeSort(), KUFz:&wK
new HeapSort() G|*G9nQ
}; XXm'6xD-
bcn7,ht
public static String toString(int algorithm){ bb1f/C%
return name[algorithm-1]; #q;z8 @
} |z*>ixK
3ev-Iqz
public static void sort(int[] data, int algorithm) { +`Pmq}ey
impl[algorithm-1].sort(data); W-m"@<Z
} )NIv "Q
iD714+N(
public static interface Sort { ]-bQNYKX
public void sort(int[] data); (;ADW+.`J
} M)O[j}N
6.19g'{sB
public static void swap(int[] data, int i, int j) { 1qZG`Vz
int temp = data; NO4Z"3Pd_
data = data[j]; TF2KZL#A|
data[j] = temp; ve fU'
} n"Z |e tZ4
} Y{+3}drJE