[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; Y0-n\|
} Jg|XH L)
int i1=l; k\GcHI-
int i2=mid+1; )I.$=s
for(int cur=l;cur<=r;cur++){ oM`0y@QCf
if(i1==mid+1) k+pr \d~
data[cur]=temp[i2++]; G<v&4/\p`M
else if(i2>r) Q$@I"V&G.
data[cur]=temp[i1++]; O@C@eW#
else if(temp[i1] data[cur]=temp[i1++]; R/z=p_6p7`
else W9GVt$T7
data[cur]=temp[i2++]; ;MdlwQ$`
} w&T9;_/
} ~FG]wNgS
5]Y?m'
} 81 sG
fS78>*K
改进后的归并排序: HCC#j9UN6
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package org.rut.util.algorithm.support; }?Ai87-{
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import org.rut.util.algorithm.SortUtil; 'AS|ZRr/
+ @s"zp;F
/** @QPz#-
* @author treeroot `&ckZiq
* @since 2006-2-2 7\Y0z
* @version 1.0 ExL0?FemWV
*/ x-&@wMqkc
public class ImprovedMergeSort implements SortUtil.Sort { ) ahA[
C1 GKLl~
private static final int THRESHOLD = 10; *mvlb (' &
={@6{-tl
/* K^<BW(s
* (non-Javadoc) pJ'"j 6Q
* Od,qbU4O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PP33i@G
*/ K:#I
public void sort(int[] data) { &powy7rR
int[] temp=new int[data.length]; 7}5JDG
mergeSort(data,temp,0,data.length-1); o9yJf#-En
} _H7x9 y=
'$]97b7G
private void mergeSort(int[] data, int[] temp, int l, int r) { ^'{Fh"5
int i, j, k; V#gK$uv
int mid = (l + r) / 2; `Cynj+PCe
if (l == r) rlSeu5X6
return; L2i_X@/
if ((mid - l) >= THRESHOLD) uGK.\PB$
mergeSort(data, temp, l, mid); }-2 2XYh
else i#Bf"W{F
insertSort(data, l, mid - l + 1); r1{@Ucw2
if ((r - mid) > THRESHOLD) ~H<6gN<j(.
mergeSort(data, temp, mid + 1, r); jZkcBIK2
else ?ri?GmI|
insertSort(data, mid + 1, r - mid); u(F_oZ~
h_3E)jc
for (i = l; i <= mid; i++) { x}I+Iggi
temp = data; nRZ]z( b
} i^Y+?Sx
for (j = 1; j <= r - mid; j++) { u?<%q!
temp[r - j + 1] = data[j + mid]; :g=qz~2Xk
} cO+qs[ BQ
int a = temp[l]; u5b|#&-mX
int b = temp[r]; Ma']?Rb`
for (i = l, j = r, k = l; k <= r; k++) { Vl=l?A8
if (a < b) { _P 3G
data[k] = temp[i++]; .K2qXw"S#
a = temp; Q}K"24`=
} else { b)5uf'?-
data[k] = temp[j--]; oC: {aK6\
b = temp[j]; x$.^"l-vX
} J~zUp(>K
} iDz++VNV
} l<LP&
*-=(Q`3
/** GxI!{oi2
* @param data %G/hD
* @param l .*?wF
* @param i 4I k{
*/ rv^@,8vq
private void insertSort(int[] data, int start, int len) { z2_*%S@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); BxWPC#5
} i$:*Pb3mV
} j@U]'5EVB
} r?lf($D*
} vrhT<+q
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堆排序： +\c5]`
DJXmGt]
package org.rut.util.algorithm.support; 7{)G_?Q&
. y-D16V
import org.rut.util.algorithm.SortUtil; rb2S7k0{
UXc-k
/** 5T_n %vz
* @author treeroot qo90t{|c
* @since 2006-2-2 u<6<iD3y
* @version 1.0 LqoB 10Kc\
*/ <EB+1GFuI
public class HeapSort implements SortUtil.Sort{ -aPg#ub
(cAIvgI
/* (non-Javadoc) _"Dv uR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j^j1
*/ 3nIU1e
public void sort(int[] data) { @;zl
MaxHeap h=new MaxHeap(); \Xt7`I<
h.init(data); 6y%qVx#!
for(int i=0;i h.remove(); L3u&/Tn2
System.arraycopy(h.queue,1,data,0,data.length); 55nlg>j
} B4c]}r+
?*G|XnM&
private static class MaxHeap{ t9kzw*U9
|C;=-|
void init(int[] data){ 0U(@=7V
this.queue=new int[data.length+1]; jiV<+T?
for(int i=0;i queue[++size]=data; _wbF>z
fixUp(size); LvH4{B
} ?yrX)3hyH
} -j#2}[J7
?/wm(uL
private int size=0; &=@IzmA
!=*g@mgF
private int[] queue; i^X]j
GfxZ'VIn
public int get() { E<{R.r
return queue[1]; )#0O>F~
} u:6Ic)7'
y|C(X
public void remove() { /wQy17g
SortUtil.swap(queue,1,size--); O@T9x$
fixDown(1); :;RMo2Tl
} lK?uXr7^
file://fixdown e/KDw
private void fixDown(int k) { rT=rrvV3g
int j; 0#7>o^2
while ((j = k << 1) <= size) { ^H p; .f.
if (j < size %26amp;%26amp; queue[j] j++; [SjqOTon{
if (queue[k]>queue[j]) file://不用交换 8l>?Pv
break; & TCkpS
SortUtil.swap(queue,j,k); f&NgS+<K$
k = j; A9KET$i@v
} !{+,B5 Hc
} ]g#:KAqz
private void fixUp(int k) { NlA,'`,
while (k > 1) { $P >
int j = k >> 1; /7(W?xOe
if (queue[j]>queue[k]) ^rB8? kt
break; -mbt4w
SortUtil.swap(queue,j,k); f$o_e90mu
k = j; prUN)r@U
} z{%<<pZ
} bt@< ut\
pE3?"YO
} \,'m</o~,
H9Gh>u]}
} pN,u`[
vRYQ{:
SortUtil： `_6C{<O
=bAx,,D#
package org.rut.util.algorithm; .y'>[
(fhb0i-
import org.rut.util.algorithm.support.BubbleSort; 8$]1M,$r
import org.rut.util.algorithm.support.HeapSort; xf'V{9*
import org.rut.util.algorithm.support.ImprovedMergeSort; mn'A9er
import org.rut.util.algorithm.support.ImprovedQuickSort; b.OsiT;_j
import org.rut.util.algorithm.support.InsertSort; <q)#
import org.rut.util.algorithm.support.MergeSort; av(6wht8
import org.rut.util.algorithm.support.QuickSort; ;'gWu
import org.rut.util.algorithm.support.SelectionSort; tb 5`cube
import org.rut.util.algorithm.support.ShellSort; 2/U.|*mH
m%0p\Y-/
/** H[T?\Lq
* @author treeroot \wmN
* @since 2006-2-2 V~qNyOtA]
* @version 1.0 05|=`eJ
*/ n5|fHk^s
public class SortUtil { "BAK !N$9
public final static int INSERT = 1; [=C6U_vU
public final static int BUBBLE = 2; _OYasJUMG
public final static int SELECTION = 3; \-E^lIVF
public final static int SHELL = 4; -$\y_?}
public final static int QUICK = 5; OUE(I3_
public final static int IMPROVED_QUICK = 6; R- X5K-
public final static int MERGE = 7; UB@Rs|)
public final static int IMPROVED_MERGE = 8; Od,=mO*.Q
public final static int HEAP = 9; pR<`H'
cUk7i`M;6
public static void sort(int[] data) { *9 {PEx
sort(data, IMPROVED_QUICK); $yP*jO4i
} eNh39er
private static String[] name={ 4>YR{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j\yjc/m
}; _!#@@O0p/h
%64)(z
private static Sort[] impl=new Sort[]{ I]|Pq
new InsertSort(), e v}S+!|U
new BubbleSort(), D'>_I.
new SelectionSort(), ME$[=?7XX
new ShellSort(), ?JbilK}a
new QuickSort(), je\Ph5"
new ImprovedQuickSort(), S E<FL/x1#
new MergeSort(), 2F;y;l%
new ImprovedMergeSort(), $V;i '(&7
new HeapSort() 8qoMo7-f
}; ~i= _J3'
B^=-Z8
public static String toString(int algorithm){ AD>e?u
return name[algorithm-1]; 4(n-_BS
} E,Z$pKL?
b1q"!+8y
public static void sort(int[] data, int algorithm) { -]Bq|qTH[(
impl[algorithm-1].sort(data); j a[Et/r
} u~N?NW Q
'ycJMYP8
public static interface Sort { ^S<Y>Nm]
public void sort(int[] data); 5&g@3j]
} \<h0Q,e
&A/]pi-\
public static void swap(int[] data, int i, int j) { uh_RGM&
int temp = data; ,oe <
data = data[j]; 3d8L6GJ
data[j] = temp; Eh`7X=Z7E
} ?PxP% $hS
} ZgJQ?S$D