[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; ZbFD|~[ V
} 22l'kvo4"
int i1=l; 7)rQf{q7
int i2=mid+1; BIx*t9wA
for(int cur=l;cur<=r;cur++){ |Xso}Y{
if(i1==mid+1) )&c2+Y@
data[cur]=temp[i2++]; !nmZ"n|}p
else if(i2>r) 4)8k?iC*
data[cur]=temp[i1++]; ?%O>]s
else if(temp[i1] data[cur]=temp[i1++]; L!Jx`zM^
else QQJGqM3a2
data[cur]=temp[i2++]; aHhLz>H'
} PR{ubMn
} pS?D~0Nb
Rk$7jZdTf
} 1iT_mtXK$
R?wZ\y Ks}
改进后的归并排序: E>fY,*0
+t7HlAXB#
package org.rut.util.algorithm.support; 9{pT)(Wnb
|_53So:g
import org.rut.util.algorithm.SortUtil; ;}B=g/C
(j8*F Bq
/** >tg)F|@
* @author treeroot ,N$Q']Td
* @since 2006-2-2 6i/unwe!`)
* @version 1.0 (kL"*y/"p
*/ g@H<Q('fJ
public class ImprovedMergeSort implements SortUtil.Sort { %JeNDXbI4
5gz^3R|`f
private static final int THRESHOLD = 10; gwaSgV$z
Dl!0Hl
/* O"\4[HE^
* (non-Javadoc) 0akJv^^D
* qnP4wRpr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +w0Wg.4V
*/ MTYV~S4/
public void sort(int[] data) { `^#Rwn#
int[] temp=new int[data.length]; r/h\>s+N
mergeSort(data,temp,0,data.length-1); ,2AulX1
} W6?=9].gc
! fk W;|
private void mergeSort(int[] data, int[] temp, int l, int r) { )Kx.v'
int i, j, k; =eA|gt
int mid = (l + r) / 2; /KH85/s
if (l == r) *zRig|k!H
return; a`Bp^(f}
if ((mid - l) >= THRESHOLD) veDv14
mergeSort(data, temp, l, mid); .{gDw
else ;(K/O?nrJ
insertSort(data, l, mid - l + 1); P$'PB*5d|
if ((r - mid) > THRESHOLD) yz [pF
mergeSort(data, temp, mid + 1, r); \d:Q%S
else 7sVM[lr<
insertSort(data, mid + 1, r - mid); wPU5L*/*i
9DBX.|
for (i = l; i <= mid; i++) { :{<|,3oNdR
temp = data; %)i&|AV"
} ,u@:(G
for (j = 1; j <= r - mid; j++) { G)0 4'|W
temp[r - j + 1] = data[j + mid]; YusmMsN?
} A^lm0[3q
int a = temp[l]; :U\*4l
int b = temp[r]; Bc!<!
for (i = l, j = r, k = l; k <= r; k++) { )pI( <
if (a < b) { H@- GYX"4
data[k] = temp[i++]; {]Mwuqn
a = temp; `U0XvWPr[
} else { h]@'M1D%
data[k] = temp[j--]; e=XP4h
b = temp[j]; ~v&Q\>'
} t<Sa;[+
} rFcz0
} /%&5Iq\:vA
e!Z}aOeE
/** [cDkmRV
* @param data @oY+b!L
* @param l L%[>z'Zp
* @param i N/>:})dav
*/ CeU=A9
private void insertSort(int[] data, int start, int len) { ]U@~vA#''
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WBKf)A^S
} !,$K;L
} NJJ=ch
} g mWwlkf9
} UNSXr`9
wMgF*
堆排序： bOU"s>?
7.2G}O6$
package org.rut.util.algorithm.support; U=%(kOx
w\[l4|g`
import org.rut.util.algorithm.SortUtil; I[rR-4.F]
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/** XR VZU~ZV
* @author treeroot {oOUIP
* @since 2006-2-2 #Fo#f<bp
* @version 1.0 6wT ])84
*/ {nM1$
public class HeapSort implements SortUtil.Sort{ m*1
h#Rza-?"\
/* (non-Javadoc) f4,|D |
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]'n4e*
*/ RFsUb:%V7-
public void sort(int[] data) { Tei2[siA5
MaxHeap h=new MaxHeap(); |3FGMg%
h.init(data); #B <%
for(int i=0;i h.remove(); zrSYLG
System.arraycopy(h.queue,1,data,0,data.length); D9;pjY
} Fnk@)1
g :B4zlKG
private static class MaxHeap{ GwXhn2
;`xCfOY(
void init(int[] data){ sWse (_2
this.queue=new int[data.length+1]; 0datzEns`
for(int i=0;i queue[++size]=data; oR8'^G0<
fixUp(size); G3y8M|:
} E;`^`T40
} 5|jY
I*N v|HST
private int size=0; LRWM}'.s
|Wa.W0A
private int[] queue; <7)sS<I
&Qv HjjQ?u
public int get() { E_'H=QN c
return queue[1]; %=*|:v
} 9D`K#3}
9iJ$M!
public void remove() { 7l/ZRz}1
SortUtil.swap(queue,1,size--); 7. $wK.
fixDown(1); <-' !I&
} &RbPN^
file://fixdown 6~jAh@-
private void fixDown(int k) { a-S tOO5s
int j; 7f k)a
while ((j = k << 1) <= size) { iOZ#}"
if (j < size %26amp;%26amp; queue[j] j++; qAd=i0{N
if (queue[k]>queue[j]) file://不用交换 }%PK %/ zI
break; .9Cy<z
SortUtil.swap(queue,j,k); w-R.)
k = j; C+M]"{Y+
} w oIZFus
} =Yl ea,S
private void fixUp(int k) { a}FY^4hl+
while (k > 1) { jTg~]PQ^
int j = k >> 1; 6jBi?>[I
if (queue[j]>queue[k]) !x ~s`z
break; ^>ir&$
SortUtil.swap(queue,j,k); 5oCg&aT
k = j; DrioBb@
} mj9sX^$dE
} A/:_uqm4
_()1"5{
} :Cx|(+T
/W*Z.
} QD3tM5(Yr
H"UJBO>$
SortUtil： vR!g1gI23
45wtl/^9
package org.rut.util.algorithm; N>*+Wg$Ne
>Y"Ru#Ju9
import org.rut.util.algorithm.support.BubbleSort; S/7?6y~
import org.rut.util.algorithm.support.HeapSort; 4Yya+[RY
import org.rut.util.algorithm.support.ImprovedMergeSort; UrEfFtH'
import org.rut.util.algorithm.support.ImprovedQuickSort; _tQR3I5
import org.rut.util.algorithm.support.InsertSort; c R6:AGr
import org.rut.util.algorithm.support.MergeSort; NuC+iC$_/
import org.rut.util.algorithm.support.QuickSort; phqmr5s^H
import org.rut.util.algorithm.support.SelectionSort; #hF(`oX}4K
import org.rut.util.algorithm.support.ShellSort; K)F6TvWv
^ah9:}Ll
/** 3/0E9'
* @author treeroot MPD<MaW$
* @since 2006-2-2 R>n=_C
* @version 1.0 *32hIiCm
*/ p5\B0G<m
public class SortUtil { \d}>@@U&
public final static int INSERT = 1; YGf<!
public final static int BUBBLE = 2; ?I332,,q
public final static int SELECTION = 3; J>p6')Y6~
public final static int SHELL = 4; 9B?-&t
public final static int QUICK = 5; -]kvM
public final static int IMPROVED_QUICK = 6; 'nSo0cyQ
public final static int MERGE = 7; b,uudtlH
public final static int IMPROVED_MERGE = 8; ,IDCbJ
public final static int HEAP = 9; K:(E"d;
2nkymEPu
public static void sort(int[] data) { kBg8:bo~
sort(data, IMPROVED_QUICK); xSy`VuSl
} =C 7WQ
private static String[] name={ ;Bwg'ThT
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u4vyj#V
}; z~(3S8$
]-"G:r
private static Sort[] impl=new Sort[]{ < wi9
new InsertSort(), &hu>yH>j
new BubbleSort(), }WDzzjDR+
new SelectionSort(), W!t=9i
new ShellSort(), <sli!rv
new QuickSort(), T:I34E[
new ImprovedQuickSort(), TQ5*z,CkS
new MergeSort(), Lz{z~xNHW.
new ImprovedMergeSort(), cPy/}A
new HeapSort() RG_.0'5=hc
}; #g=
xM)6'= x6
public static String toString(int algorithm){ {;vLM* '
return name[algorithm-1]; #+#^cqjZ
} =~_
,0a\Ka{^
public static void sort(int[] data, int algorithm) { 7>lM^ :A
impl[algorithm-1].sort(data); /]oQqZHv
} 5Mz:$5Tm
_Wqy,L;J
public static interface Sort { !|\l*
public void sort(int[] data); 7YFEyX10d
} D$N;Qb
+/ rt'0o
public static void swap(int[] data, int i, int j) { PdtL Cgd
int temp = data; d}Q%I
data = data[j]; Z@(KZ|
data[j] = temp; BU#3fPl
} dTjDVq&Hz
} p(6 sN=