[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; \bXusLI!l
} (JX 9c
int i1=l; /^M|$JRI
int i2=mid+1; MP6Py@J45
for(int cur=l;cur<=r;cur++){ Z%m\/wr
if(i1==mid+1) ;ElwF&"!X
data[cur]=temp[i2++]; c9/&A
else if(i2>r) %96l(JlJ)B
data[cur]=temp[i1++]; HI\V29 a
else if(temp[i1] data[cur]=temp[i1++]; Fo.p}j+>
else 'nQQqx%v
data[cur]=temp[i2++]; W ])Lc3X
} JmBe1"hs
} ^.gBHZ
:iEIo7B
} R!z32 <5k
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改进后的归并排序: ehTRw8"R
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package org.rut.util.algorithm.support; gt \O
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import org.rut.util.algorithm.SortUtil; 96#aGh>
p|0ZP6!|
/** 2~B9 (|
* @author treeroot VKb=)v[K
* @since 2006-2-2 !kQJ6U
* @version 1.0 )RCva3Ul
*/ yM PZ}
public class ImprovedMergeSort implements SortUtil.Sort { zd0[f3~
w l#jSj%pd
private static final int THRESHOLD = 10; {b,#l]v
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/* E'^$~h$
* (non-Javadoc) 7=`_UqCV
* /D~MHO{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ir<K"wi(2
*/ L (@".{T
public void sort(int[] data) { &6O0h0Vy
int[] temp=new int[data.length]; \Y$@$)
mergeSort(data,temp,0,data.length-1); o |"iW" +
} 2t}^8
\R|qXB $
private void mergeSort(int[] data, int[] temp, int l, int r) { q/eod
int i, j, k; tO~o-R
int mid = (l + r) / 2; MZWicfUy
if (l == r) c`s ]ciC
return; (yO8G-Z0
if ((mid - l) >= THRESHOLD) 'z$!9ufY,
mergeSort(data, temp, l, mid); Aa!#=V1d
else .T*89cEu
insertSort(data, l, mid - l + 1); <(tnClAn
if ((r - mid) > THRESHOLD) a0)]W%F
mergeSort(data, temp, mid + 1, r); LB\+*P6QM
else ;=lQMKx0
insertSort(data, mid + 1, r - mid); / 0ra]}[(
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for (i = l; i <= mid; i++) { Wagb|B\
temp = data; /I~(*X
} B!AJ*
for (j = 1; j <= r - mid; j++) { 8;<3Tyjzu
temp[r - j + 1] = data[j + mid]; "NvB@>S
} G_v^IM#B=
int a = temp[l]; ojbms>a
int b = temp[r]; ,/Al'
for (i = l, j = r, k = l; k <= r; k++) { fl+dL#]
if (a < b) { 9R3YUW}s
data[k] = temp[i++]; 2*pNIc
a = temp; *}RV)0mif
} else { COFCa&m9c
data[k] = temp[j--]; r 3FUddF'
b = temp[j]; B#, TdP]/
} EY}*}-3
} Z@gEJ^"yA"
} JWVn@)s
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/** `7 3I}%?
* @param data hwi$:[
* @param l xz*MFoE
* @param i <o: O<p@6
*/ _r?.%]\.
private void insertSort(int[] data, int start, int len) { <G /a-Z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cIQe^C
} &d@N3y
} @XN*H- |
} (dHil#l
} 4Ixu%
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堆排序： UE 1tm
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package org.rut.util.algorithm.support; J{r3y&:
AkA2/7<[
import org.rut.util.algorithm.SortUtil; KOit7+Q
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/** ,Wlw#1fP
* @author treeroot 1+9}Xnxb
* @since 2006-2-2 ,niQs+'<
* @version 1.0 S&{#sl#e
*/ DpvMY94Qh
public class HeapSort implements SortUtil.Sort{ %3es+A@
J?oEzf;M
/* (non-Javadoc) 8Uoqj=5F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3}nkTZG
*/ O>/&-Wk=
public void sort(int[] data) { -^WW7 g`
MaxHeap h=new MaxHeap(); W3y9>]{x^
h.init(data); [_1K1i"m
for(int i=0;i h.remove(); li
System.arraycopy(h.queue,1,data,0,data.length); fT0+inRG
} cjc1iciZ
>{.|Ng4K
private static class MaxHeap{ Fh~ pB>t
AR6hfdDDT
void init(int[] data){ J9q[u[QZ9O
this.queue=new int[data.length+1]; n7iIY4gZ
for(int i=0;i queue[++size]=data; VY j pl
fixUp(size); Ct9dV7SH
} 18AlQ+')?w
} ,`U'q|b
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private int size=0; ?;ovh nY)
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private int[] queue; iE* Y@E5x0
bI+ TFOP
public int get() { 68nBc~iAm
return queue[1]; (x1 #_~
} hs?cV)hDS
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public void remove() { Tw@:sWC
SortUtil.swap(queue,1,size--); ^-dhz88wV
fixDown(1); /5j]laYK)
} a4x(lx&
file://fixdown MBO>.M$B
private void fixDown(int k) { u$nYddak
int j; ^ SW!S_&Z2
while ((j = k << 1) <= size) { +a74] H"
if (j < size %26amp;%26amp; queue[j] j++; *s (L!+
if (queue[k]>queue[j]) file://不用交换 DUWSY?^c
break; ;]Ko7M(4
SortUtil.swap(queue,j,k); ;\rKkH"K8n
k = j; {:ZsUnzm
} FSA"U9 w<
} aJSBG|IC
private void fixUp(int k) { C$7dmGjZ
while (k > 1) { <gjA(xT5
int j = k >> 1; v|GDPq
if (queue[j]>queue[k]) 2_CJV
break; y9X1X{
SortUtil.swap(queue,j,k); ?vV&tqnx%
k = j; ^8{:RiN6e~
} i~uoK7o|G
} ]=jpqxlx
OG{vap)
} DW0UcLO
DRmN+2I
} }D*5PV%d
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SortUtil： <a)L5<#
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package org.rut.util.algorithm; 3#~w#Q0%
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import org.rut.util.algorithm.support.BubbleSort; X$9 "dL
import org.rut.util.algorithm.support.HeapSort; +=g9T`YbE
import org.rut.util.algorithm.support.ImprovedMergeSort; (VB-5&b
import org.rut.util.algorithm.support.ImprovedQuickSort; NG\^>.8
import org.rut.util.algorithm.support.InsertSort; ">!<OB
import org.rut.util.algorithm.support.MergeSort; o 76QQ+hP
import org.rut.util.algorithm.support.QuickSort; OE5JA8/H
import org.rut.util.algorithm.support.SelectionSort; 4NRG{FZ9
import org.rut.util.algorithm.support.ShellSort; F8>J(7On
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/** $pfN0/`(
* @author treeroot Z{rD4S@^
* @since 2006-2-2 ,Ep41v;T%`
* @version 1.0 8 CCA}lOG
*/ v)-:0f
public class SortUtil { g: ,*Y^T
public final static int INSERT = 1; u>h|A(<
public final static int BUBBLE = 2; 7f#r&~=
public final static int SELECTION = 3; } DQ KfS
public final static int SHELL = 4; v>E3|w%
public final static int QUICK = 5; v8NoD_
public final static int IMPROVED_QUICK = 6; [@`Ki
public final static int MERGE = 7; 7$|L%Sk
public final static int IMPROVED_MERGE = 8; W B7gY\Y&M
public final static int HEAP = 9; M\)(_I)V=
=`fz#Mfd
public static void sort(int[] data) { Bxs0m]
sort(data, IMPROVED_QUICK); 6}^6+@LG
} a@niig
private static String[] name={ uM74X^U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" MH h;>tw
}; rLJjK$_x
sq1v._^s
private static Sort[] impl=new Sort[]{ >%Nqgn$V
new InsertSort(), khS >
new BubbleSort(), ^K`Vqo
new SelectionSort(), %xhA2
new ShellSort(), K %Qj<{)
new QuickSort(), Nd;,Wz]
new ImprovedQuickSort(), ~2M+Me
new MergeSort(), 3W.5[;}
new ImprovedMergeSort(), JF-ew"o<E
new HeapSort() /d prs(*K
}; v5g]_v*F
,n\'dMNii
public static String toString(int algorithm){ lMRy6fzI
return name[algorithm-1]; x&YcF78
} xa$p,_W:'
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public static void sort(int[] data, int algorithm) { k(%h{0'
impl[algorithm-1].sort(data); w;8VD`>[|
} M;zJ1
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public static interface Sort { .C?rToCY
public void sort(int[] data); 9w08)2$Na
} VKb'!Ystl
8V(-S,
public static void swap(int[] data, int i, int j) { $<v{$UOh
int temp = data; NkL>ru!b9
data = data[j]; J~(M%] &k^
data[j] = temp; -wUw)gJbM
} o.M.zkP a
} 3_cZaru