[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; $cYh X^YG.
} O* 7"Q&
int i1=l; O8M;q!)y
int i2=mid+1; uu'~[SZlL
for(int cur=l;cur<=r;cur++){ g4U%(3,>D
if(i1==mid+1) >y2gfD
data[cur]=temp[i2++]; 5I@< 6S&X
else if(i2>r) -l^u1z
data[cur]=temp[i1++]; ]r|X[9
else if(temp[i1] data[cur]=temp[i1++]; qi$6y?
else Qxt,@<IK
data[cur]=temp[i2++]; N 0`)WLW
} Ut0oh
} ;Q\Duj
IY+P Yad
} c!j$-Ovm
/SjA;c!.
改进后的归并排序: }+,;wj~
qA5tMZ^w
package org.rut.util.algorithm.support; eAPGy-
'(~+ \
import org.rut.util.algorithm.SortUtil; JZ9w!)U
@/7tN3O
/** $(G.P!/
* @author treeroot 6>zO"9
* @since 2006-2-2 PjDYdT[
* @version 1.0 4OC^IS
*/ y&UcTE2;%(
public class ImprovedMergeSort implements SortUtil.Sort { w8c71C
8|HuxE
private static final int THRESHOLD = 10; +AO(e
0)+F}SyyD
/* REli`"bR
* (non-Javadoc) FG:(H0
* 3D(/k%;)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )Z,O*u*
*/ %?^IS&]Z
public void sort(int[] data) { DFcgUEq
int[] temp=new int[data.length]; n~@;[=o?5
mergeSort(data,temp,0,data.length-1); t*iKkV^aE
} MQ7N8@!t
"sdzm%
private void mergeSort(int[] data, int[] temp, int l, int r) { nd}[X[ay
int i, j, k; $TGE
int mid = (l + r) / 2; `$Z:j;F
if (l == r) 6* (6>F5
return; iP)`yB5`
if ((mid - l) >= THRESHOLD) *?:V)!.2z
mergeSort(data, temp, l, mid); tZB"(\
else ;=fOyg
insertSort(data, l, mid - l + 1); gY|f[M|
if ((r - mid) > THRESHOLD) +`}QIp0
mergeSort(data, temp, mid + 1, r); *eK\W00
else }>]V_}h
insertSort(data, mid + 1, r - mid); 8iA[w-Pv
f#f<Ii
for (i = l; i <= mid; i++) { U[,."w]T
temp = data; JFewOt3
} E^qJ5pr_P
for (j = 1; j <= r - mid; j++) { D<U^FT
temp[r - j + 1] = data[j + mid]; :7>oFz
} ^hiIMqY_{`
int a = temp[l]; v#c'p^T
int b = temp[r]; 41Ga-0p
for (i = l, j = r, k = l; k <= r; k++) { 4}.PQ{
if (a < b) { Fj;];1nt
data[k] = temp[i++]; 71b0MHNkvv
a = temp; 0gTv:1F/
} else { MD|T4PPz,}
data[k] = temp[j--]; AS5'j
b = temp[j]; n#$sLXVy
} h@AKfE!\~
} v'RpsCov
} #K#BNpG|
fab.%$
/** Jt++3]
* @param data A#7/,1h\
* @param l yM}~]aQ y
* @param i R5Pk>-KF
*/ ty ESDp%
private void insertSort(int[] data, int start, int len) { #ME!G/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =-bGH
} I-Q@v`
} +}VaQ8ti4
} u}r>?/V!
} `^v=*&
eR3v=Q
堆排序： Jn7T5$pJ
I|n?32F
package org.rut.util.algorithm.support; <?Ln`,Duk
8NnGN(a*D
import org.rut.util.algorithm.SortUtil; z( \4{Y
zsM2R"[X
/** ThvgYv--B
* @author treeroot / f5q9sp8
* @since 2006-2-2 JtvZ~s
* @version 1.0 Bo,>blspw
*/ I=[Ir8};
public class HeapSort implements SortUtil.Sort{ YjCHKI"e
CP'b,}Dd?I
/* (non-Javadoc) -=cxUDB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \OJam<hZ
*/ hv0bs8h
public void sort(int[] data) { Wu~cy}\
MaxHeap h=new MaxHeap(); oBO4a^D
h.init(data); 5^ck$af
for(int i=0;i h.remove(); Tbp;xv_qo
System.arraycopy(h.queue,1,data,0,data.length); XL3m#zW&
} KS'n$
?:tk8Kgf
private static class MaxHeap{ ))%f"=:wt
2U|"]tpM&
void init(int[] data){ %*zV&H
this.queue=new int[data.length+1]; ?6Wv["%
for(int i=0;i queue[++size]=data; 38 ]}+Bb
fixUp(size); w/z o
} \ 5.nr*5
} Sa[?B
Cag^$nj
private int size=0; a<0q%Ax
S{m:Iij[;
private int[] queue; g`z;:ao
.mHVJ5^:4\
public int get() { \G#_z|'dN
return queue[1]; O _C<h
} Gf +>AjU'
Y\Z6u)
public void remove() { CcTdLq
SortUtil.swap(queue,1,size--); {,!!jeOO
fixDown(1); 0&u=(;Dr\
} H_ a##z
file://fixdown 6FYL},.R
private void fixDown(int k) { ?W_8X2(`
int j; <.#jp([W>
while ((j = k << 1) <= size) { O>N/6Z
if (j < size %26amp;%26amp; queue[j] j++; 2TG2<wqvE
if (queue[k]>queue[j]) file://不用交换 Kton$%Li
break; PR/>E60H
SortUtil.swap(queue,j,k); MDQ:6Ri
k = j; &xt[w>/i
} e"UXG\8D
} rd>>=~vx=/
private void fixUp(int k) { ^&\pY
while (k > 1) { /!JxiGn
int j = k >> 1; w/^_w5
if (queue[j]>queue[k]) ^W(ue]j}o
break; a~ RY 8s
SortUtil.swap(queue,j,k); T Xiu/g(
k = j; LGw-cX #
} q:nUn?zB
} "n{';Q)
x ;~;Ah.p
} n=)LB& m
=jKu=!QPq
} |)v}\-\#
M3elog:M
SortUtil： Rp;"]Q&b
7O8 @T-f+2
package org.rut.util.algorithm; w:9`R<L
W[k rq_c-
import org.rut.util.algorithm.support.BubbleSort; E7i/gY
import org.rut.util.algorithm.support.HeapSort; ,cxe"U
import org.rut.util.algorithm.support.ImprovedMergeSort; \[qxOZ{
import org.rut.util.algorithm.support.ImprovedQuickSort; ~+d{:WY
import org.rut.util.algorithm.support.InsertSort; GGo~39G
import org.rut.util.algorithm.support.MergeSort; "N">RjJ"
import org.rut.util.algorithm.support.QuickSort; ~3-"1E>Rgy
import org.rut.util.algorithm.support.SelectionSort; @-L\c>rqT
import org.rut.util.algorithm.support.ShellSort; FGPqF;
s FJ:09L|
/** t*; KxQ+'?
* @author treeroot }D+ b`,
* @since 2006-2-2 ).`v&-cK4E
* @version 1.0 *DvX||`&
*/ S,C c0)j>
public class SortUtil { o=#ym4hJ%
public final static int INSERT = 1; +*xc4
public final static int BUBBLE = 2; #?+[|RS|
public final static int SELECTION = 3; 6&5D4 V
public final static int SHELL = 4; j^;P=L0=
public final static int QUICK = 5; ~ES%=if~Y
public final static int IMPROVED_QUICK = 6; kN3 <l7
public final static int MERGE = 7; 8ki3>"!A
public final static int IMPROVED_MERGE = 8; b%*`}B
public final static int HEAP = 9; 2@?X>,
WtKKdL
public static void sort(int[] data) { "wcw`TsK
sort(data, IMPROVED_QUICK); ',!jYh}Uxk
} gvc/Z <Y
private static String[] name={ 9BpxbU+L;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tl{{Vc[
}; '^C *%"I]
<wb6)U.
private static Sort[] impl=new Sort[]{ 6$:Q]zR#'H
new InsertSort(), (]\p'%A)
new BubbleSort(), A`JE(cIz3
new SelectionSort(), >&:}L%
new ShellSort(), N P+vi@Ud
new QuickSort(), X`EVjK
new ImprovedQuickSort(), j24DL+
new MergeSort(), l`l6Y>c*]
new ImprovedMergeSort(), CshME\/
new HeapSort() 7sQHz.4
}; !;mn]wR>a
%o4v} mzV
public static String toString(int algorithm){ AX%}ip[PC
return name[algorithm-1]; U^|T{g+O
} 1ig*Xp[
?>{u@tYL
public static void sort(int[] data, int algorithm) { -BI!ZsC'
impl[algorithm-1].sort(data); aNY-F)XWa
} /*>}y$
M;b3- i
public static interface Sort { ,u^{zYoW
public void sort(int[] data); 9G2rVk
} !W8=\:D[
kr~n5WiAZ
public static void swap(int[] data, int i, int j) { 64#Ri!RR}
int temp = data; [;7zg@Sa
data = data[j]; K> 4w
data[j] = temp; /YUW)?o!^N
} ubfh4
} 3u[8;1}7Q