[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; rk)h_zN
} -VafN
int i1=l; y3Q2d7G
int i2=mid+1; n1Fp$9%
for(int cur=l;cur<=r;cur++){ mhi^zHpa
if(i1==mid+1) 6!A+$"
data[cur]=temp[i2++]; -oMp@2\e
else if(i2>r) *t_JR
data[cur]=temp[i1++]; gCP f1z
else if(temp[i1] data[cur]=temp[i1++]; ZQN%!2
else N#&/d nV
data[cur]=temp[i2++]; zy\R>4i'#Q
} "eH.<&
} P>wTp)
,@Aeo9}
} LEJn 1
O <#H5/Tq
改进后的归并排序: 8h$f6JE
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package org.rut.util.algorithm.support; &Ndq^!e
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import org.rut.util.algorithm.SortUtil; kNC]q,ljt5
aQ#6PO7.Z
/** {Q/_I@m].
* @author treeroot ( SiwO.TZ
* @since 2006-2-2 4<<T#oW.:G
* @version 1.0 ;vp[J&=
*/ q'CtfmI`r=
public class ImprovedMergeSort implements SortUtil.Sort { yr[HuwU
3aERfIJyE
private static final int THRESHOLD = 10; %Q.|qyq
)mh,F#"L
/* Nu4PY@m]C
* (non-Javadoc) Kq&JvY^
* t_NnQ4)=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?>T (
*/ 17) `CM$<[
public void sort(int[] data) { P0O=veCf
int[] temp=new int[data.length]; 9^2l<4^Z
mergeSort(data,temp,0,data.length-1); ]MaD7q>+R
} .3:s4=(f
IRY/0v
private void mergeSort(int[] data, int[] temp, int l, int r) { ~`!{5:v
int i, j, k; }:xj%?ki
int mid = (l + r) / 2; 8iXt8XY3
if (l == r) $e/[!3CASP
return; kx6-8j3gD7
if ((mid - l) >= THRESHOLD) `\M}~
mergeSort(data, temp, l, mid); aC,?FWm
else cM;,nX%/
insertSort(data, l, mid - l + 1); CMviR<.
if ((r - mid) > THRESHOLD) Jknit
mergeSort(data, temp, mid + 1, r); bc%N !d
else 353*D%8
insertSort(data, mid + 1, r - mid); WX}pBmU
vf/|b6'y
for (i = l; i <= mid; i++) { Ek,$XH
temp = data; nv}z%.rRUj
} +H6cZ,
for (j = 1; j <= r - mid; j++) { $I4:g.gKpG
temp[r - j + 1] = data[j + mid]; Og/@w&
} .EdQ]c-E=
int a = temp[l]; >O/1Lpl.3
int b = temp[r]; %P HYJc
for (i = l, j = r, k = l; k <= r; k++) { %?i~`0-:n%
if (a < b) { BU=;rz!;
data[k] = temp[i++]; ZO\x|E!b
a = temp; ~ "stI
} else { ]Z=O+7(r
data[k] = temp[j--]; ! ~3zp L
b = temp[j]; "S^""5
} g$9EI\a
} %Z!3[.%F
} Vm]u-R`{
:7DXLI|L#?
/** CoTe$C7
* @param data |\6Ff/O
* @param l uj^l&"
* @param i df@G+v0_1
*/ atYe$Db
private void insertSort(int[] data, int start, int len) { m=Fk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XTS%:S
} ?A2jj`N1x
} M)Z3q
} #@8JYzMq%
} 0;SRmj@W
U^Ulj/%6
堆排序： 1b`WzoJgH
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package org.rut.util.algorithm.support; 7>!Rg~M
l2 mO{'|C
import org.rut.util.algorithm.SortUtil; dH_g:ocA
3}gf%U]L
/** vq-#%o
* @author treeroot CCp&+LRvR
* @since 2006-2-2 ql2O%B.6?
* @version 1.0 *Fu;sR2y%:
*/ 3JXKpk?
public class HeapSort implements SortUtil.Sort{ Kp?j\67S
1 TA\6a}
/* (non-Javadoc) #{x4s?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (hn;C>B
*/ Gf\u%S!%
public void sort(int[] data) { hjx=?
MaxHeap h=new MaxHeap(); {~{</ g/
h.init(data); rLx'.:
for(int i=0;i h.remove(); 1ILAUtf)
System.arraycopy(h.queue,1,data,0,data.length); j*#k%;c
} +xn59V
09sdt;V Q
private static class MaxHeap{ xXfFi5Eom
Dh.pH1ZY3n
void init(int[] data){ -'~61=PD
this.queue=new int[data.length+1]; S?e*<s9k
for(int i=0;i queue[++size]=data; Q5>]f/LD
fixUp(size); &hSF
} <0!)}O
} kJK:1;CM?.
xn,I<dL39
private int size=0; .$N8cYu0
U~s-'-C/
private int[] queue; ? H7?>ZE
H:!pFj
public int get() { |nT+W|0U
return queue[1]; BZ}_
} t:yJ~En]=
"HrZv+{
public void remove() { %hV]vm
SortUtil.swap(queue,1,size--); TT3\c,cs
fixDown(1); x}X hL
} ^Kfm(E
file://fixdown 7]lUPLsl
private void fixDown(int k) { *!&,)''
int j; J[jzkzSu`
while ((j = k << 1) <= size) { Rs;Y|W4'
if (j < size %26amp;%26amp; queue[j] j++; -Ta| qQa
if (queue[k]>queue[j]) file://不用交换 "d c- !
break; pu,|_N[xq8
SortUtil.swap(queue,j,k); uL9O_a;!
k = j; b_>x;5k
} u]jvXPE6
} z-G*:DfgH
private void fixUp(int k) { 1CA%nqlng
while (k > 1) { }x(Ewr
int j = k >> 1; 1}"Prx-
if (queue[j]>queue[k]) 3R6=C~
break; I|R;)[;X
SortUtil.swap(queue,j,k); VGeyZ\vU
k = j; 0W!S.]^1
} $i"IOp
} h}yfL@
Y:4/06I
} /MV2#P@
4'GosQ85
} W'L
H rI(uZ]
SortUtil： j+NsNIJq
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package org.rut.util.algorithm; !1[ZfTX^a
U}^`R,C
import org.rut.util.algorithm.support.BubbleSort; -AZ\u\xCB
import org.rut.util.algorithm.support.HeapSort; `*w!S8}m;
import org.rut.util.algorithm.support.ImprovedMergeSort; *r].EBJ\
import org.rut.util.algorithm.support.ImprovedQuickSort; (%SKTM
import org.rut.util.algorithm.support.InsertSort; X^7n/|%*.
import org.rut.util.algorithm.support.MergeSort; 3eR c>^wh
import org.rut.util.algorithm.support.QuickSort; 0^mCj<g
import org.rut.util.algorithm.support.SelectionSort; N.dcQQ_iS
import org.rut.util.algorithm.support.ShellSort; ,FWsgqL{l
a&%v^r[
/** /f]'_t0\.
* @author treeroot )8 %lZ{
* @since 2006-2-2 !T$h?o
* @version 1.0 @:K={AIa
*/ l?:S)[:
public class SortUtil { s>ohXISB[
public final static int INSERT = 1; @Jc^ur
public final static int BUBBLE = 2; xy+hrbD)j
public final static int SELECTION = 3; Uj twOv|pF
public final static int SHELL = 4; dr^MW?{a\
public final static int QUICK = 5; y!/:1BHlm
public final static int IMPROVED_QUICK = 6; yyc4'j+
public final static int MERGE = 7; ]7J*(,sp
public final static int IMPROVED_MERGE = 8; /A1qTG=Br
public final static int HEAP = 9; cd]def[d
A&L2&ofV&q
public static void sort(int[] data) { Wh^wKF~%
sort(data, IMPROVED_QUICK); X{tfF!+iy
} rL|9Xru
private static String[] name={ )W |_f
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _FP'SVa}D
}; Eu`K2_b
lc\%7-%:5
private static Sort[] impl=new Sort[]{ b0uWUI(=
new InsertSort(), uy8mhB+]
new BubbleSort(), !m6=Us
new SelectionSort(), s(cC;
new ShellSort(), W ![*0pL
new QuickSort(), ?$~5ti#\
new ImprovedQuickSort(), Q&8epO|J
new MergeSort(), 5;X3{$y
new ImprovedMergeSort(), qv)%)n
new HeapSort() 3.w &e0Es
}; 67]!xy
a}V<CBi
public static String toString(int algorithm){ !a^'Jbb
return name[algorithm-1]; /kNSB;
} _6]c f!H
PYr'1D'
public static void sort(int[] data, int algorithm) { XU6SYC"t%~
impl[algorithm-1].sort(data); /5m~t.Z9M
} ]BaK8mPl
|SuN3B4e
public static interface Sort { l09SWug
public void sort(int[] data); <~n%=^knE
} M sQ=1
BjV;/<bt
public static void swap(int[] data, int i, int j) { uQiW{Kja2
int temp = data; s7s@!~
data = data[j]; lX/:e=
data[j] = temp; wG X\ub#!
} Bj* M W
} |Fe*t