[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; *^{j!U37s
} d,i4WKp
int i1=l; fO5L[U^`
int i2=mid+1; ( -q0!]E
for(int cur=l;cur<=r;cur++){ $tW E9_
if(i1==mid+1) %}N01P|X>
data[cur]=temp[i2++]; y"Fu=
else if(i2>r) -0;{
data[cur]=temp[i1++]; !Y|xu07
else if(temp[i1] data[cur]=temp[i1++]; )R<93`q
else ,@p4HN*
data[cur]=temp[i2++]; 7~1Fy{tc
} a 01s'9Be
} 89 m.,
Z3wdk6%:}
} ^FNju/b
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改进后的归并排序: qh}+b^Wi
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package org.rut.util.algorithm.support; LdiNXyyzet
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import org.rut.util.algorithm.SortUtil; @JdeOL;
3:$@DZT$
/** %kkDitmI{
* @author treeroot r&v!2A]:
* @since 2006-2-2 <x<qO=lq
* @version 1.0 J<"Z6 '0v
*/ &a\w+
public class ImprovedMergeSort implements SortUtil.Sort { &'/PEOu&}G
rcLF:gd]E
private static final int THRESHOLD = 10; +DefV,Ny
$u,A/7\s
/* B&KIM{j\
* (non-Javadoc) BUi,+NdIk
* Cv>~%<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h0 %M+g
*/ D=D.s)ns*
public void sort(int[] data) { }YC=q
int[] temp=new int[data.length]; w0yzC0yBk
mergeSort(data,temp,0,data.length-1); Xe`$SNM
} ^f(El(w
2Nm{.Y
private void mergeSort(int[] data, int[] temp, int l, int r) { P9`CW
int i, j, k; c?c"|.-<p
int mid = (l + r) / 2; x)%"i)
if (l == r) *<{hLf
return; &Nr+-$
if ((mid - l) >= THRESHOLD) 1p/_U?H:|
mergeSort(data, temp, l, mid); d"3x11|
else $*XTX?,'
insertSort(data, l, mid - l + 1); S:g6z'e1
if ((r - mid) > THRESHOLD) L1k
mergeSort(data, temp, mid + 1, r); l%i*.b(
else -c0*
insertSort(data, mid + 1, r - mid); xjxX4_
Om7 '_}
for (i = l; i <= mid; i++) { E\Iz:ES^
temp = data; (Cti,g~
} ]-heG'y]{
for (j = 1; j <= r - mid; j++) { (yT&&_zY4
temp[r - j + 1] = data[j + mid]; h{~GzrL*
} NN:zQ_RT
int a = temp[l]; 2=7[r-*E
int b = temp[r]; :c}PW"0v
for (i = l, j = r, k = l; k <= r; k++) { h6`VU`pPI
if (a < b) { \Yv44*I`
data[k] = temp[i++]; |a\,([aU
a = temp; HmsXV_B8[Y
} else { @YS,)U)4S
data[k] = temp[j--]; RSM+si/
b = temp[j]; m\=Cw&(
} RWDPsZC
} H-m).^
} JNvgUb'U
n0':6*oGW
/** :IsJE6r
* @param data >*l2]3'`
* @param l YWANBM(v+
* @param i pNQ@aJ
*/ &=Y%4vq
private void insertSort(int[] data, int start, int len) { 5Tidb$L;Du
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fo9V&NE
} `J{{E,y @
} h,fahbH-
} :Xx7':5
} -=u9>S)!c
o/RGzPR
堆排序： ^}z:FI
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package org.rut.util.algorithm.support; +).=}.k
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import org.rut.util.algorithm.SortUtil; }g2l ni
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/** *li5/=UC5*
* @author treeroot 0*uJS`se6Z
* @since 2006-2-2 ^zG!Z:E
* @version 1.0 IMy!8$\u
*/ "zIQ(|TL?d
public class HeapSort implements SortUtil.Sort{ )4YtdAV
6UPGE",u
/* (non-Javadoc) 6iH]N*]S^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Us>n`Lj@
*/ ]h=y
public void sort(int[] data) { :`@W`V?6-
MaxHeap h=new MaxHeap(); W3MH8z
h.init(data); V<n#%!M5gV
for(int i=0;i h.remove(); JJ_KfnH
System.arraycopy(h.queue,1,data,0,data.length); gp{Z]{io
} gi? wf
|Y+[_D}
private static class MaxHeap{ [Fd[(
*unJd"<*&@
void init(int[] data){ uy=<n5`oNG
this.queue=new int[data.length+1]; #D+.z)iZn
for(int i=0;i queue[++size]=data; ?/Aql_?3
fixUp(size); 4`"Q!T_'
} :|ytw=3>
} l2LO,j}
M!PK3
private int size=0; t|:XSJ9
Fow{-cs_p
private int[] queue; E3_ 5~>
~~,#<g[
public int get() { n4AQ
return queue[1]; ugW.nf*O
} @Y6~;(p
j6rwlwN
public void remove() { 3"6-X_
SortUtil.swap(queue,1,size--); R <u\ -
fixDown(1); Xpmi(~n
} OZl0I#@A
file://fixdown !8J%%Ux&M
private void fixDown(int k) { yMb.~A^$J
int j; 8U-<Q>
while ((j = k << 1) <= size) { 8{Wh4~|+
if (j < size %26amp;%26amp; queue[j] j++; niCq`!
if (queue[k]>queue[j]) file://不用交换 sQ82(N7l
break; =XUt?5
SortUtil.swap(queue,j,k); myZ8LQ&
k = j; z-kB!~r
} !wjD6NK
} 8qq'q"g
private void fixUp(int k) { GYri\<[
while (k > 1) { xC$CRzAe5p
int j = k >> 1; kx[h41|n
if (queue[j]>queue[k]) cvnRd.&
break; ^0"[l {
SortUtil.swap(queue,j,k); /gLi(Uw
k = j; Zu^J X/um
} EMS$?"K
} Y&*nj`n
`H|#l\
} [PU0!W;
'A#l$pJp7
} #_fL[j&
,09d"7`X
SortUtil： =Wl}Pgo!
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package org.rut.util.algorithm; |uln<nM9
H:L<gv(rG
import org.rut.util.algorithm.support.BubbleSort; =q*j". <
import org.rut.util.algorithm.support.HeapSort; v6KF0mqA&
import org.rut.util.algorithm.support.ImprovedMergeSort; *5S~@
import org.rut.util.algorithm.support.ImprovedQuickSort; nx`I9j\
import org.rut.util.algorithm.support.InsertSort; pGSS
import org.rut.util.algorithm.support.MergeSort; O<qo%fP
import org.rut.util.algorithm.support.QuickSort; 6y)NH 8l7
import org.rut.util.algorithm.support.SelectionSort; 5!d'RBO
import org.rut.util.algorithm.support.ShellSort; UxVxnJ_
h-RL`X
/** | <l=i(
* @author treeroot |jyoT%SQ
* @since 2006-2-2 gLPgh%B4
* @version 1.0 s4{>7`N2
*/ +,ojlTVlt
public class SortUtil { vBjrI*0
public final static int INSERT = 1; wO ?A/s
public final static int BUBBLE = 2; ,qO2D_
public final static int SELECTION = 3; RE75TqYW
public final static int SHELL = 4; [>U =P`
public final static int QUICK = 5; NYp46;
public final static int IMPROVED_QUICK = 6; 3n=ftkI
public final static int MERGE = 7; %u02KmV.
public final static int IMPROVED_MERGE = 8; 5Qgh\4
public final static int HEAP = 9; =LMM]'no,
97L#3L6t
public static void sort(int[] data) { ygfUy
sort(data, IMPROVED_QUICK); R8<P}mv
} 5IiZnGu
private static String[] name={ 6.gk6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dgM@|&9*m
}; 4z>SI\Ss
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private static Sort[] impl=new Sort[]{ H)O I&?
new InsertSort(), q<Zza
new BubbleSort(), k'JfXrW<!
new SelectionSort(), =-|,v*
new ShellSort(), O4fl$egQU
new QuickSort(), *.F4?i2D
new ImprovedQuickSort(), use` y^c
new MergeSort(), ptEChoZ6
new ImprovedMergeSort(), h1.<\GO
new HeapSort() #=\nuT'oy
}; /#I~iYPe
uiIS4S_
public static String toString(int algorithm){ L9":=
return name[algorithm-1]; _iZ_.3Ip
} ky-9I<Z,,
r5S5;jL%t
public static void sort(int[] data, int algorithm) { Z1ZjQt#~+
impl[algorithm-1].sort(data); hTVA^j(w
} r;cILS|Xr
79O'S du@
public static interface Sort { VgyY7INx9
public void sort(int[] data); <mX EX`?
} Tg~SGAc
p? L*vcU
public static void swap(int[] data, int i, int j) { wPrqFpf
int temp = data; Kk9W=vd
data = data[j]; 5'zD}[2
data[j] = temp; C6{\^kG^j2
} UY$Lqe~
} ZF~@a+o