[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; q0vZR"y
} X*5N&AJ
int i1=l; Pv\8 \,B9
int i2=mid+1; oEFo7X`t
for(int cur=l;cur<=r;cur++){ &2q<#b
if(i1==mid+1) v?Cakwu
data[cur]=temp[i2++]; b+hN\/*]
else if(i2>r) @qx$b~%
data[cur]=temp[i1++]; DvOvtd
else if(temp[i1] data[cur]=temp[i1++]; ]gaeN2
else HPt\ BK
data[cur]=temp[i2++]; d'3"A"9R7-
} Ss\?SEq
} 'Yc^9;C(
hH%fWB2(
} fZ;}_wR-H
>dD$GD{
改进后的归并排序: n'JS-
FS!)KxC/-
package org.rut.util.algorithm.support; gm!sLZ!X
8.I3%u
import org.rut.util.algorithm.SortUtil; BD86t[${W
asLrXGGyT
/** BS?$eai@:9
* @author treeroot bz~aj}"`
* @since 2006-2-2 [cl+AV "
* @version 1.0 2cRru]VZ5
*/ IXm[c@5l
public class ImprovedMergeSort implements SortUtil.Sort { v'^}zO
Sl<1Rme=w
private static final int THRESHOLD = 10; AP1ZIc6
}#g+~9UK
/* X-TGrdoX
* (non-Javadoc) h%4UeL &F
* ;#0$iE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D.x8=|;
*/ 7-}5 W
public void sort(int[] data) { e+4Eiv
int[] temp=new int[data.length]; Z5)v
mergeSort(data,temp,0,data.length-1); *">CEQ[MT
} 9d(#/n
D<<q5gG
private void mergeSort(int[] data, int[] temp, int l, int r) { Wv;,@xTZ
int i, j, k; ?.lo[X<,*
int mid = (l + r) / 2; DBLM0*B
if (l == r) IXR'JZ?fH
return; 'RzO`-dr
if ((mid - l) >= THRESHOLD) _VmXs&4
mergeSort(data, temp, l, mid); bQwG"N
else E'(nJ
insertSort(data, l, mid - l + 1); ZU+_nWnl
if ((r - mid) > THRESHOLD) p|dn&<kd
mergeSort(data, temp, mid + 1, r); *rHz/& ,
else _9p79S<+
insertSort(data, mid + 1, r - mid); ,&o^}TFkg
-p>1:M <
for (i = l; i <= mid; i++) { Q6e7Z-8
temp = data; Cg`lQYU
} 7l~^KsX
for (j = 1; j <= r - mid; j++) { *,*O.#<6
temp[r - j + 1] = data[j + mid]; ~kSOYvK$'
} .9,x_\|G*
int a = temp[l]; "bWx<
int b = temp[r]; lQvgq
for (i = l, j = r, k = l; k <= r; k++) { T:H~Y+qnt
if (a < b) { 9&`";dg
data[k] = temp[i++]; S7#dyAX8
a = temp; j|N<6GSke
} else { a l6y=;\jZ
data[k] = temp[j--]; [C<K~
b = temp[j]; M*Ej*#
} "+wkruC
} _2{_W9k
} / #rH18
h{$k%YJ?
/** 0( A ?&
* @param data H{S+^'5Y.
* @param l ]*lZFP~
* @param i [6_.Y*}N
*/ .P")S|
private void insertSort(int[] data, int start, int len) { mU?~s7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); uozq^sy
} 7DoU7I\u
} |0}7/^
} WVOj;c
} %iEdUV\$
]7yxXg
堆排序： 3(,m(+J[S
y,ub*-:
package org.rut.util.algorithm.support; k`|E&+og
'g'RXC}D>
import org.rut.util.algorithm.SortUtil; bGK*1FlH
|O oczYf
/** Yg,b ;H
* @author treeroot ju"?b2f
* @since 2006-2-2 Hc8He!X*#
* @version 1.0 4Y2I'~'
*/ ^H1m8=
public class HeapSort implements SortUtil.Sort{ -o`K/f}d
QJrXn6`
/* (non-Javadoc) y"'p#j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KF1iYo>p
*/ [)GRP
public void sort(int[] data) { -$0}rfX
MaxHeap h=new MaxHeap(); ?~t5>PEonv
h.init(data); <g;,or#$
for(int i=0;i h.remove(); e!gNd>b {
System.arraycopy(h.queue,1,data,0,data.length); V&vG.HAT
} V\{@c%xW
vcp{Gf|^
private static class MaxHeap{ *i:8g(
l>pB\<LL
void init(int[] data){ xRhGBb{@s
this.queue=new int[data.length+1]; oq!\100
for(int i=0;i queue[++size]=data; K\XQE50
fixUp(size); ]y=U"g
} ?Fny_{&^H
} ort*Ux)
CsycR@[
private int size=0; ?YZgH>7"
#0uu19+}
private int[] queue; "RK"Pn+
Mog [,{w
public int get() { C,W_0=!e
return queue[1]; A:GqR;;"x>
} HJ]e%og
1Td`S1'#yg
public void remove() { +ZW>JjP*
SortUtil.swap(queue,1,size--); iQ8{N:58DN
fixDown(1); -Pt E+R[A
} RH _b
file://fixdown eF.nNu
private void fixDown(int k) { $hcv}<$/
int j; @<pd@Mpf]
while ((j = k << 1) <= size) { R8u8jG(4
if (j < size %26amp;%26amp; queue[j] j++; p}1gac_c
if (queue[k]>queue[j]) file://不用交换 ]?D$n
break; SM RKEPwp&
SortUtil.swap(queue,j,k); )D6i {I0
k = j; gWa0x-
} jy5[K.
} %H"
private void fixUp(int k) { ]wEI*c(
while (k > 1) { C=q&S6/+
int j = k >> 1; h'=)dFw7
if (queue[j]>queue[k]) { >izfG,\
break; g_P98_2f.k
SortUtil.swap(queue,j,k); y'odn;
k = j; mhhc}dS(H
} N~CQh=<
} |^UQVNJ
)^s>21
} ;7?oJH;
H,w8+vZ4\
} wZ\93W-}
X;6;v]
SortUtil： 1R~$m
6O6B8
package org.rut.util.algorithm; \:1$E[3v
sfw*_}y
import org.rut.util.algorithm.support.BubbleSort; x,10o
import org.rut.util.algorithm.support.HeapSort; 3MHpP5C
import org.rut.util.algorithm.support.ImprovedMergeSort; p19(>|$J
import org.rut.util.algorithm.support.ImprovedQuickSort; .$x}~Sw
import org.rut.util.algorithm.support.InsertSort; 9v*y&V9/
import org.rut.util.algorithm.support.MergeSort; JluA?B7E
import org.rut.util.algorithm.support.QuickSort; >W-xDzJry
import org.rut.util.algorithm.support.SelectionSort; 3I( n];
import org.rut.util.algorithm.support.ShellSort; EHn!ZrQgh
:6t73\O
/** ?#:']q
* @author treeroot *f;$5B#^
* @since 2006-2-2 dO1m
* @version 1.0 PDA9.b<q0
*/ E.NfVeq
public class SortUtil { RxJbQs$Ph
public final static int INSERT = 1; XfVdYmii
public final static int BUBBLE = 2; UMd.=HC L
public final static int SELECTION = 3; hN=kU9@knC
public final static int SHELL = 4; y|MhV/P04
public final static int QUICK = 5; iZdl0;16[
public final static int IMPROVED_QUICK = 6; 0R\.G1f%
public final static int MERGE = 7; 2INpo
public final static int IMPROVED_MERGE = 8; ,pTZ/#vP#
public final static int HEAP = 9; 9ETdO,L)f
X{Vs
public static void sort(int[] data) { x+6z9{O
sort(data, IMPROVED_QUICK); 'h6G"=+
} O^-QqCZE
private static String[] name={ gTTKjlI[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R,PN?aj
}; sgK =eBE
w2'z~\dG8
private static Sort[] impl=new Sort[]{ ?;P6#ByR
new InsertSort(), pn(i18x
new BubbleSort(), ]3*w3Y!XK
new SelectionSort(), vW*Mf}=
new ShellSort(), ,=Wj*S)~
new QuickSort(), H'YKj'
new ImprovedQuickSort(), Zh;}Q(w
new MergeSort(), t6KKfb
new ImprovedMergeSort(), > _sSni
new HeapSort() L{>rN`{
}; i{$P.i/&
H9TeMY
public static String toString(int algorithm){ ",gVo\^
return name[algorithm-1]; fmv:vs /9
} ]$s)6)kW
V*te8HIe
public static void sort(int[] data, int algorithm) { )#\3c,<Y
impl[algorithm-1].sort(data); Z.@n7G
} LXby(|<j
L9Zz-Dr s
public static interface Sort { =GP L>a&
public void sort(int[] data); k CGb~+
} ATc!c +
uQ[,^Ee&/
public static void swap(int[] data, int i, int j) { ]SU)L5Dt;
int temp = data; }\8-&VoY#X
data = data[j]; 6o6yx:
data[j] = temp; fI0"#iv}
} |?0MRX0'g
} ;7qzQ{Km