[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; )1ciO+_
} ~Gza$ K
int i1=l; *np|PyLP:
int i2=mid+1; 'u~use"
for(int cur=l;cur<=r;cur++){ AmHIG_'
if(i1==mid+1) LvaF4Y2v
data[cur]=temp[i2++]; Qpc>5p![3
else if(i2>r) K[H$qJmPX
data[cur]=temp[i1++]; Hl51R"8o
else if(temp[i1] data[cur]=temp[i1++]; R !HL+
else `7`iCYiTy
data[cur]=temp[i2++]; 191)JWfa
} .'M]cN~
} a>6p])Wh
\uH;ng|m
} Rh|&{Tf
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改进后的归并排序: T^ -RP
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package org.rut.util.algorithm.support; cD]t%`*
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import org.rut.util.algorithm.SortUtil; qdhD6#r
Z3Y%VHB_F(
/** P_}$|zj7
* @author treeroot FK>rc3 q
* @since 2006-2-2 Zx6BK=4G
* @version 1.0 B(hNBq7
*/ .+.Pc_fv
public class ImprovedMergeSort implements SortUtil.Sort { Im2g2]
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private static final int THRESHOLD = 10; a[!':-R`s
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/* %O-wMl
* (non-Javadoc) G7u7x?E:B`
* 0X;Dr-3<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xM(
*/ G8@%)$A
public void sort(int[] data) { F-m1GG0s
int[] temp=new int[data.length]; e2>gQ p/
mergeSort(data,temp,0,data.length-1); 6xwC1V?:0t
} }0I! n@
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private void mergeSort(int[] data, int[] temp, int l, int r) { Mppb34y
int i, j, k; y3vOb, 4
int mid = (l + r) / 2; SRMy#j-
if (l == r) B; ~T|exu
return; z[B7k%}
if ((mid - l) >= THRESHOLD) YS9|J=!~
mergeSort(data, temp, l, mid); D .E>Y
else {"s8X(#_sC
insertSort(data, l, mid - l + 1); 1cPi>?R:
if ((r - mid) > THRESHOLD) Z|u_DaSrr|
mergeSort(data, temp, mid + 1, r); wx<DzC
else [e(-
insertSort(data, mid + 1, r - mid); 3=z'Ih`
,%u\2M
for (i = l; i <= mid; i++) { |yS4um(w
temp = data; K/altyj`
} H4UnF5G
for (j = 1; j <= r - mid; j++) { +IMP<
temp[r - j + 1] = data[j + mid]; ,ua]h8
} :t(}h!7
int a = temp[l]; 'O CVUF,
int b = temp[r]; U^.$k-|k
for (i = l, j = r, k = l; k <= r; k++) { sD M!Uv2n
if (a < b) { &iTsuA/7
data[k] = temp[i++]; rkVZP!7!
a = temp; F4*f_lP
} else { 9K)2OX;$w
data[k] = temp[j--]; =fm/l-P@
b = temp[j]; Rzz*[H
} Da.vyp
} uu HWN|
} tP`,Egf"g
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/** qRNGe8
* @param data <w[)T`4N
* @param l k(et b#
* @param i *M&~R(TMn
*/ XBBsdldZ
private void insertSort(int[] data, int start, int len) { }pA0mW9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 778a)ZOzb
} Bdf3@sbM]
} NVP~`sxiZ
} 07n=H~yU
} Uj_%U2S$
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堆排序： pDW .Pav
VF;%Z
package org.rut.util.algorithm.support; *T 6<'a
m%akx@{WL
import org.rut.util.algorithm.SortUtil; oA`Ncu5
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/** "MOM@4\
* @author treeroot \W4|.[
* @since 2006-2-2 !W^P|:Qt
* @version 1.0 LR%]4$ /M
*/ QZw`+KR
public class HeapSort implements SortUtil.Sort{ 9bwG3jn4?
B OKY X
/* (non-Javadoc) P-U9FKrt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zsOOx% +
*/ n%X5TJE
public void sort(int[] data) { %m)vQ\Vtx
MaxHeap h=new MaxHeap(); SI\ O>a9{
h.init(data); 1L3+KD~
for(int i=0;i h.remove(); /fgy07T
System.arraycopy(h.queue,1,data,0,data.length); M-7^\wXTA
} ld
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private static class MaxHeap{ 2:GS(%~
r"YOA@
void init(int[] data){ M$,4B
this.queue=new int[data.length+1]; mH6\8I
for(int i=0;i queue[++size]=data; E/OfkL*\
fixUp(size); <!;NJLe`
} SJ*qgI?}T
} zPm|$d
yVfF *nG
private int size=0; grVPu! B;
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private int[] queue; d RIuA)0s
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public int get() { &a8%j+j
return queue[1]; jEMnre3/
} s'B$/qCkR
kltorlH
public void remove() { pddumbp
SortUtil.swap(queue,1,size--); T|k_$LH
fixDown(1); tfIUH'Ez>
} bUU\bc
file://fixdown 7x=-1wbi
private void fixDown(int k) { 5Sz&j
int j; rczwxWK
while ((j = k << 1) <= size) { \%}w7J;
if (j < size %26amp;%26amp; queue[j] j++; 4OOI$J$Jh
if (queue[k]>queue[j]) file://不用交换 @Ta0v:Y
break; 0d/ f4
SortUtil.swap(queue,j,k); R!>l7p/|H)
k = j; 7hlzuZob+y
} P" aw--f(
} vyBx|TR
private void fixUp(int k) { ~P fk
while (k > 1) { L_5o7~`0
int j = k >> 1; +8}8b_bgH
if (queue[j]>queue[k]) /lLG|aAe
break; 0ky3rFSh1
SortUtil.swap(queue,j,k); 9]gV#uF
k = j; %Y=
} L"L a|
} MjW{JR)I
&[t} /+)
} W~& QcSWqD
zP>=K
} !-Uq#Ea0/
=>*9"k%m
SortUtil： Ask~
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package org.rut.util.algorithm; ? @- t.N
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import org.rut.util.algorithm.support.BubbleSort; }F-,PSH Ml
import org.rut.util.algorithm.support.HeapSort; .*Axr\x3
import org.rut.util.algorithm.support.ImprovedMergeSort; Of;$ VK'
import org.rut.util.algorithm.support.ImprovedQuickSort; mr+8[0
import org.rut.util.algorithm.support.InsertSort; DI\^&F)3T2
import org.rut.util.algorithm.support.MergeSort; Ai~d
import org.rut.util.algorithm.support.QuickSort; B/K{sI
import org.rut.util.algorithm.support.SelectionSort; qf*e2"~v
import org.rut.util.algorithm.support.ShellSort; `L @`l
LIh71Vg/cc
/** s;,ulME
* @author treeroot \eCQL(_
* @since 2006-2-2 x8Nij:K#
* @version 1.0 w1)SuMFK_
*/ $yZ(ws
public class SortUtil { 15cgmZsS
public final static int INSERT = 1; M5{vYk>,1Q
public final static int BUBBLE = 2; XBos^Q
public final static int SELECTION = 3; TnLblkX
public final static int SHELL = 4; aFDCVm%U|
public final static int QUICK = 5; S%7%@Qs"%
public final static int IMPROVED_QUICK = 6; 70E@h=oQ
public final static int MERGE = 7; wb6$R};?
public final static int IMPROVED_MERGE = 8; ^"4u1
public final static int HEAP = 9; HE*P0Yf=
fj[tm
public static void sort(int[] data) { ZowPga
sort(data, IMPROVED_QUICK); A5YS "i
} '?b.t2
private static String[] name={ 8zH/a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" UpqDGd7M
}; k6??+b:rE
y:dwx*Q9I
private static Sort[] impl=new Sort[]{ 0zqTX< A
new InsertSort(), aR0v qRF
new BubbleSort(), )}SiM{g
new SelectionSort(), 3L%g2`
new ShellSort(), Eq'oy~.oV
new QuickSort(), !Nno@SP@
new ImprovedQuickSort(), hP=z<&zb/
new MergeSort(), (N$$N:ac[t
new ImprovedMergeSort(), G9jlpf5>
new HeapSort() l&m'?.gf
}; "dBCS
E']Gh
public static String toString(int algorithm){ 9Jp"E5Ql)
return name[algorithm-1]; uT{.\qHo
} -u%'u~s
P8;f^3V(+/
public static void sort(int[] data, int algorithm) { *,oZ]!
impl[algorithm-1].sort(data); ;@I}eZ,f$
} 2s8(r8AI
0%5x&vx'S
public static interface Sort { jY5BVTWnV
public void sort(int[] data); K7$Vl"l
} !FR1yO'd>
Yq%D/dU8
public static void swap(int[] data, int i, int j) { t+BLO<
int temp = data; .X(ocs$}
data = data[j]; (r )fx
data[j] = temp; fY9/u=
} /pDI \]
} m7~[f7U