[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; c%2QZC
} ;!mzyb*
int i1=l; t~EPn.
int i2=mid+1; wc NOLUl
for(int cur=l;cur<=r;cur++){ 2~1SQ.Q<RY
if(i1==mid+1) +_?hK{Ib"
data[cur]=temp[i2++]; $%CF8\0
else if(i2>r) rJT^H5!o"
data[cur]=temp[i1++]; iohop(LZ
else if(temp[i1] data[cur]=temp[i1++]; kHghPn?8]
else 0w\zLU
data[cur]=temp[i2++]; %S@ZXf~:
} RK'\C\gMDu
} tqvN0vY5
"$Z= %.3Q
} 7$vYo _
hOu3 bA
改进后的归并排序: .9on@S
uD$u2
package org.rut.util.algorithm.support; "3)C'WlEy/
x=hiQ>BIO0
import org.rut.util.algorithm.SortUtil; @fZ,.2ar
j9x<Y]
/** h5{'Q$Erl
* @author treeroot <;eW=HT+uq
* @since 2006-2-2 j^j1
* @version 1.0 o/$}
*/ W#4 7h7M
public class ImprovedMergeSort implements SortUtil.Sort { +eWQa`g
=)H.cuc
private static final int THRESHOLD = 10; !N\@'F!
g2LM_1\
/* *v jmy/3
* (non-Javadoc) 55nlg>j
* JgKO|VO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {7"Q\
*/ xaq-.IQAM$
public void sort(int[] data) { t9kzw*U9
int[] temp=new int[data.length]; W7R<%?
mergeSort(data,temp,0,data.length-1); $Uq|w[LA
} ?>D+ge
_JzEGpeG
private void mergeSort(int[] data, int[] temp, int l, int r) { ITE{@1
int i, j, k; *KZYv=s,u
int mid = (l + r) / 2; M)J5;^["
if (l == r) vsCCB}7\
return; ~9a<0Mc?
if ((mid - l) >= THRESHOLD) 75cW_t,g
mergeSort(data, temp, l, mid); :}L[sl\R
else UAkT*'cB
insertSort(data, l, mid - l + 1); $B2J T9
if ((r - mid) > THRESHOLD) fIx+ILs
mergeSort(data, temp, mid + 1, r); xBThq?N?
else 0rQMLx
insertSort(data, mid + 1, r - mid); rKe2/4>0X
q~b&
for (i = l; i <= mid; i++) { $u$!tj
temp = data; *.ll<p+(-
} 1E[J%Rh\l
for (j = 1; j <= r - mid; j++) { tVYF{3BhA
temp[r - j + 1] = data[j + mid]; [`#CXq'
} @wGPqg
int a = temp[l]; ?hZAxR\
int b = temp[r]; YiXk5B0Uh
for (i = l, j = r, k = l; k <= r; k++) { rT=rrvV3g
if (a < b) { #5Qpu
data[k] = temp[i++]; WrnrFz
a = temp; g+8OekzB5
} else { : Xda1S
data[k] = temp[j--]; jnkR}wAA
b = temp[j]; L4@K~8j7
} a=|K%ii+Y
} 1jmjg~W
} pxA?
9@SC}AF.
/** afCW(zHp
* @param data t>L2
* @param l A]_7}<<N
* @param i NlA,'`,
*/ a kkNI3
private void insertSort(int[] data, int start, int len) { fF!Yp iI"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E+j/Cu
} $g^@AdE%
} aj-Km`5r}
} Hc;[Cs0
} +r�
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堆排序： P7[h-3+^
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package org.rut.util.algorithm.support; J@/kIrx
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import org.rut.util.algorithm.SortUtil; o@_q]/Mh
\,'m</o~,
/** /`Ug9,*
* @author treeroot %HhBt5w
* @since 2006-2-2 ,5P0S0*{
* @version 1.0 O0*p0J
*/ mtpeRVcF
public class HeapSort implements SortUtil.Sort{ :;v~%e{k
=bAx,,D#
/* (non-Javadoc) [>vLf2OID
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &Gc9VF]o
*/ VnSCz" ?3
public void sort(int[] data) { DcS+_>a\{l
MaxHeap h=new MaxHeap(); n.}ZkG0`
h.init(data); [DYQ"A=)d
for(int i=0;i h.remove(); "-Mp_O]
System.arraycopy(h.queue,1,data,0,data.length); c rQ8q;:
} nd`1m[7MNu
a)!o @
private static class MaxHeap{ ./XYd"p
3RUy,s
void init(int[] data){ b3P+H r
this.queue=new int[data.length+1]; Q*GN`07@?d
for(int i=0;i queue[++size]=data; mwO6g~@`
fixUp(size); #QZe,"C9`
} b;L\EB
} 44J]I\+
~EW(Gs!=C
private int size=0; YByLoM*
wC"FDr+
private int[] queue; JT~4mT
E[OJ+ ;c
public int get() { q#~ (/
return queue[1]; \a<wKTkn
} hy9\57_#
B 5L2<
public void remove() { IM*y|UHt
SortUtil.swap(queue,1,size--); r[e##M
fixDown(1); l#&8x
} //B&k`u
file://fixdown 6]i-E>p3R
private void fixDown(int k) { k``_EiV4t
int j; iG$!6;w<
while ((j = k << 1) <= size) { A]*}HZ,
if (j < size %26amp;%26amp; queue[j] j++; ip\sXVR
if (queue[k]>queue[j]) file://不用交换 53_Hl]#qZ
break; pR<`H'
SortUtil.swap(queue,j,k); rV.}PtcFY
k = j; Z<oaK
} D#aDv0b
} 7lTC{7C57
private void fixUp(int k) { &{5,:%PXw
while (k > 1) { >[f?vrz
int j = k >> 1; 4>YR{
if (queue[j]>queue[k]) cs48*+m
break; m5n#v
SortUtil.swap(queue,j,k); .Cv6kgB@c
k = j; 'JtBZFq
} . P viA
} v4<nI;Ux
/*~EO{o
} Brw@g8w-X
RIR\']WN
} J[&@PUy
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SortUtil： #&+{mCjs
je\Ph5"
package org.rut.util.algorithm; W<{h,j8
alJ)^OSIe
import org.rut.util.algorithm.support.BubbleSort; VO5#Qgen
import org.rut.util.algorithm.support.HeapSort; q~Hn-5H4Q
import org.rut.util.algorithm.support.ImprovedMergeSort; .D~;u-%|F
import org.rut.util.algorithm.support.ImprovedQuickSort; z9f-.72"X
import org.rut.util.algorithm.support.InsertSort; E*&vy
import org.rut.util.algorithm.support.MergeSort; R>|{N9
import org.rut.util.algorithm.support.QuickSort; >fG3K`
import org.rut.util.algorithm.support.SelectionSort; AD>e?u
import org.rut.util.algorithm.support.ShellSort; ;._ l0Jw
eSn+B;
/** 1y&\5kB
* @author treeroot b1q"!+8y
* @since 2006-2-2 L<c4kw
* @version 1.0 |T /ZL!
*/ $GV7o{"&
public class SortUtil { 'ycJMYP8
public final static int INSERT = 1; b)#hSjWO#
public final static int BUBBLE = 2; sfH_5 #w
public final static int SELECTION = 3; UBKu/@[f@
public final static int SHELL = 4; o)|flI'vT
public final static int QUICK = 5; gk4;>}
public final static int IMPROVED_QUICK = 6; >gQ>1Bwvi
public final static int MERGE = 7; >~rTqtKd
public final static int IMPROVED_MERGE = 8; 0|qAxR-
public final static int HEAP = 9; J-:.FKf\5l
.8g)av+
public static void sort(int[] data) { Eh`7X=Z7E
sort(data, IMPROVED_QUICK); 2>9C-VL2
} hF?1y`20
private static String[] name={ w_c"@CjkE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'c&Ed
}; %Qgw7p4
5<k"K^0QS
private static Sort[] impl=new Sort[]{ h f)?1z4
new InsertSort(), CT@ jZtg0
new BubbleSort(), 0JS?;fk
new SelectionSort(), @ y.?:7I
new ShellSort(), :k]1Lm||
new QuickSort(), ^#-l q)
new ImprovedQuickSort(), GMx&y2. Z
new MergeSort(), 1nM #kJ"
new ImprovedMergeSort(), ldcqe$7,
new HeapSort() YDsb3X<0'
}; ]#<4vl\
7Die FZ?
public static String toString(int algorithm){ G't$Qx,IC
return name[algorithm-1]; ;O5zUl-`
} S72+d%$
Y Uc+0
public static void sort(int[] data, int algorithm) { `7Q<'oK
impl[algorithm-1].sort(data); M^Yh|%M
} ssA`I<p#
A 'be8
public static interface Sort { g/_5unI}u
public void sort(int[] data); P[-E@0h)-t
} +/7?HGf
u#fM_>ML
public static void swap(int[] data, int i, int j) { MKCsv+
int temp = data; Ny7S
data = data[j]; =?*!"&h
data[j] = temp; j;Gtu
} #zy:a%
} VCfl`Aq'l