[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; p%bMfi*T
} `]GL3cIh:
int i1=l; ti1R6oSn
int i2=mid+1; 67T.qX2I$
for(int cur=l;cur<=r;cur++){ };9/J3]m
if(i1==mid+1) \A\?7#9\
data[cur]=temp[i2++]; _hJ+8B^`
else if(i2>r) t6-fG/Kc
data[cur]=temp[i1++]; N,9~J"z
else if(temp[i1] data[cur]=temp[i1++]; W4nn)qBrh
else ,s}&|+ '"
data[cur]=temp[i2++]; uInI{>
} (?,jnnub
} ESIJ QM-[+
H[pvC=O=
} NzhWGr_x'
2'W#x
改进后的归并排序: q%A>q;l:
6_yatq5c
package org.rut.util.algorithm.support; +Gy9K
FR'Nzi$
import org.rut.util.algorithm.SortUtil; ia /#`#.
QjpJIw
/** "BpDlTYM
* @author treeroot "#8^":,4
* @since 2006-2-2 ?AxB0d9z
* @version 1.0 9'|k@i:
*/ oGeV!hD
public class ImprovedMergeSort implements SortUtil.Sort { rB(Q)N
XD!}uDZ^
private static final int THRESHOLD = 10; ]-X\n
5\JV}
/* y[cc<wm$
* (non-Javadoc) "k"+qR`fH
* /s(PFN8#Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n2c(x\DA&
*/ d=vD Pf
public void sort(int[] data) { v=dN$B5y3
int[] temp=new int[data.length]; q:jv9eL.O
mergeSort(data,temp,0,data.length-1); wLO"[,
} D"fjk1
++8 Xi1
private void mergeSort(int[] data, int[] temp, int l, int r) { %M^Q{` :5
int i, j, k; Ym -U{a
int mid = (l + r) / 2; =/ !A
if (l == r) 0@u{(m
return; ~_ovQ4@
if ((mid - l) >= THRESHOLD) MD4mh2
mergeSort(data, temp, l, mid); ]5ibg"{S
else T# tFzbr
insertSort(data, l, mid - l + 1); /d}5R@Oy
if ((r - mid) > THRESHOLD) 0&&P+adk
mergeSort(data, temp, mid + 1, r); wc}x [cS
else }+[!h=Bx
insertSort(data, mid + 1, r - mid); ?"}U?m=
0,__{?!
for (i = l; i <= mid; i++) { v )2yR~J
temp = data; Qd?S~3XT
} [5b[ztN%
for (j = 1; j <= r - mid; j++) { %>O}bdSf
temp[r - j + 1] = data[j + mid]; G[zysxd
} ^ 6t"A
int a = temp[l]; Cf<TDjU`|
int b = temp[r]; xw1,Wbu]
for (i = l, j = r, k = l; k <= r; k++) { EW)r/Av:,
if (a < b) { kAxJ#RG
data[k] = temp[i++]; OWYY2&.h
a = temp; B(-F|q\
} else { ~g~`,:Qc
data[k] = temp[j--]; 0r&FH$
b = temp[j]; q7rX4-G$
} -/7@ A
} \IR$~
} fv>Jn`
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/** $K|2k7
* @param data A>:31C
* @param l zFwO(
* @param i eo"XHP7ja
*/ &Fmen;(
private void insertSort(int[] data, int start, int len) { OXoEA a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); EScy!p\*
} f,-'eW/j
} cZt5;"xgr]
} Au )%w
} @$!"}xDR'
d _=44( -
堆排序： ydzvjp=
cf_X=;yaqy
package org.rut.util.algorithm.support; qNkX:|j
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import org.rut.util.algorithm.SortUtil; M|$A)D1
<&t[E0mU
/** bXHtw}n
* @author treeroot :{xu_"nYr
* @since 2006-2-2 1<M~#
* @version 1.0 6HVGqx
*/ V5I xZn%
public class HeapSort implements SortUtil.Sort{ iW?NxP
JQ\o[t
/* (non-Javadoc) 2 t]=-@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @c,=c+-
*/ DEzL]1;P
public void sort(int[] data) { wS:`c J
MaxHeap h=new MaxHeap(); F2=#\U$
h.init(data); QVN@B[9
for(int i=0;i h.remove(); $)(Zt^
System.arraycopy(h.queue,1,data,0,data.length); @Z~0!VY
} kr]_?B(r
YdAC<,e&A
private static class MaxHeap{ ".fnx8v,
C2 !F
void init(int[] data){ `[f IK,
this.queue=new int[data.length+1]; -n$hm+S
for(int i=0;i queue[++size]=data; 7q^a@5f BG
fixUp(size); xSjs+Y;Mu
} OgyHX>}bH
} D_I_=0qNd
8GT{vW9
private int size=0; 7I6&*I
pkA(\0E8
private int[] queue; tpKQ$)ed
<UJ5n) }"\
public int get() { E>}3MfL
return queue[1]; *>Zq79TG
} RYX=;n
#!M;4~Sfx
public void remove() { s.@DI|Gnf
SortUtil.swap(queue,1,size--); T(eNK c2
fixDown(1); ZCkwK
} MqswYK-s
file://fixdown QEq>zuz5;
private void fixDown(int k) { y8O<_VOO}"
int j; G]fx3=
while ((j = k << 1) <= size) { ).>O6A4:C
if (j < size %26amp;%26amp; queue[j] j++; ?$X1X`@
if (queue[k]>queue[j]) file://不用交换 lV<j?I~?Q
break; y+a]?`2
SortUtil.swap(queue,j,k); I78huYAYA
k = j; T$9tO{
} PF/eQZ*4
} QW}N,j$
private void fixUp(int k) { &r!*Y&
while (k > 1) { W-@}q}A
int j = k >> 1; 0N*~"j;r#M
if (queue[j]>queue[k]) ^0&
break; v`pIovn
SortUtil.swap(queue,j,k); M&K'5G)7
k = j; o%=OBTh_
} elm]e2)F
} N;]"_"
[CJr8Qn
} ,v+~vXO&\
ojZvgF
} ~!a~ -:#
^iaG>rvA
SortUtil： (Y%pk76d
hbv>Jjd
package org.rut.util.algorithm; w#M66=je_
F%pYnHr<
import org.rut.util.algorithm.support.BubbleSort; bjEm=4FI;
import org.rut.util.algorithm.support.HeapSort; aI:G(C?jm
import org.rut.util.algorithm.support.ImprovedMergeSort; %-eags~sUC
import org.rut.util.algorithm.support.ImprovedQuickSort; h*9s^`9)
import org.rut.util.algorithm.support.InsertSort; 8n^v,s>
import org.rut.util.algorithm.support.MergeSort; _+hf.[""
import org.rut.util.algorithm.support.QuickSort; !B &%!06
import org.rut.util.algorithm.support.SelectionSort; qXJBLIG
import org.rut.util.algorithm.support.ShellSort; Jx8?x#}
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/** 3jB5F0^r1
* @author treeroot w(KB=lA2
* @since 2006-2-2 B&E qd
* @version 1.0 co$I htOv
*/ LD~/*
public class SortUtil { <Prz>qL$
public final static int INSERT = 1; t Tky
public final static int BUBBLE = 2; G'sEbw'[
public final static int SELECTION = 3; ' s6SKjZS
public final static int SHELL = 4; \.tnzP D
public final static int QUICK = 5; Z;6v`;[
public final static int IMPROVED_QUICK = 6; q;p:)Q"
public final static int MERGE = 7; bZ.q?Hlfk
public final static int IMPROVED_MERGE = 8; B~oc.sg
public final static int HEAP = 9; .6m%/-whS
~a^"VQ5]ac
public static void sort(int[] data) { ' ?3e1
sort(data, IMPROVED_QUICK); VYb6#sl
} Rs0O4.yi;@
private static String[] name={ G/:;Qig
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t`6R)'
}; Tq7cZe"6
'<.@a"DnJ
private static Sort[] impl=new Sort[]{ I'M,p<B
new InsertSort(), 478gl o
new BubbleSort(), WxB}Uh
new SelectionSort(), 1d4?+[)gUv
new ShellSort(), o+o'!)
new QuickSort(), ([y2x.kd
new ImprovedQuickSort(), $y\\?
new MergeSort(), u&HLdSHe
new ImprovedMergeSort(), HD1+0<
new HeapSort() -^i[
}; b42"Y,sbB
h <s.o#8
public static String toString(int algorithm){ x4&<Vr
return name[algorithm-1]; "Cz8nG
} o\oS_f:RD
o/grM+_
public static void sort(int[] data, int algorithm) { Lc<v4Bp
impl[algorithm-1].sort(data); TmZ% ;TN
} UQmdm$.
^gY^I`"e6
public static interface Sort { vR X_}`m8#
public void sort(int[] data); \^$g%a
} i/j DwA
=i_ s#v[Y
public static void swap(int[] data, int i, int j) { uAd4Zz
int temp = data; \t6k(5J
data = data[j]; 1$&(ei]*:
data[j] = temp; 5 *8V4ca
} R/&Ev$:
} K\w:'%>-