[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; T jrz_o)
} r"&uW!~0
int i1=l; b'1m 9T780
int i2=mid+1; %+: $uk[
for(int cur=l;cur<=r;cur++){ 8c3/n
if(i1==mid+1) N#<X"&-_#
data[cur]=temp[i2++]; )zv"<>Q 6
else if(i2>r) O/b1^ Y
data[cur]=temp[i1++]; ?[#4WH-G
else if(temp[i1] data[cur]=temp[i1++]; m>{I>:sq
else \f-@L;8#
data[cur]=temp[i2++]; <Eu/f`8
} JH+uBZh6
} >v'@p
j^)=<+Q;=
} %$6?em_
u/.# zn@9h
改进后的归并排序: +k{l]-)1
Ov~vK\
package org.rut.util.algorithm.support; "UUoT
&ev#C%Nu
import org.rut.util.algorithm.SortUtil; CsX@u#
^OrO&w|
/** l[Ko>
* @author treeroot u$rSM0CJ
* @since 2006-2-2 %{B4M#~
* @version 1.0 >uP1k.z'I
*/ ufB9\yl{~
public class ImprovedMergeSort implements SortUtil.Sort { cMoBYk
W_bA.zT{
private static final int THRESHOLD = 10; XES$V15
2= )V"lR\
/* J 7HOSFwXn
* (non-Javadoc) 95.s,'0
* eHc.#OA&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Im"8+756
*/ 5;CqGzgoP
public void sort(int[] data) { >>T,M@s-:
int[] temp=new int[data.length]; #Fckev4
mergeSort(data,temp,0,data.length-1); B,4 3b O
} ,E&W{b
4&<zkAMR
private void mergeSort(int[] data, int[] temp, int l, int r) { *],=!
int i, j, k; V(=3K"j
int mid = (l + r) / 2; R,+"^:}
if (l == r) 'NN3XyD
return; J?/NJ-F
if ((mid - l) >= THRESHOLD) nkkUby9
mergeSort(data, temp, l, mid); c?}{>ig/)
else H8A=]Gq
insertSort(data, l, mid - l + 1); ,veo/k<"r8
if ((r - mid) > THRESHOLD) bW2Msv/H
mergeSort(data, temp, mid + 1, r); :a*F>S!
else LM*m>n*
insertSort(data, mid + 1, r - mid); :Tdl84
,!bcm
for (i = l; i <= mid; i++) { 5|g#>sx>`q
temp = data; hY/i)T{
} !|-:"hE1h
for (j = 1; j <= r - mid; j++) { g+QNIM>
temp[r - j + 1] = data[j + mid]; J:dNV<A^
} |k<5yj4?
int a = temp[l]; (AT)w/
int b = temp[r]; kPYQcOK8
for (i = l, j = r, k = l; k <= r; k++) { RY9Ur
if (a < b) { X<uH [
data[k] = temp[i++]; NC%)SG \
a = temp; OyATb{`'
} else { yJ2A!id
data[k] = temp[j--]; ,ik\MSS
b = temp[j]; s@K #M
} RJE<1!{
} t]6 4=
} r?R!/`f
l-q.VY2
/** 7!q.MOYm
* @param data ka<rlh<h
* @param l }qN
* @param i t Z]b0T(e
*/ ,%]xT>kH
private void insertSort(int[] data, int start, int len) { fH 0&Wc3yC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WZf}1.Mh*
} `_E@cZ4
} | (: PX
} ,S7M4ajVZB
} aq$adPtu
(@cZmU,
堆排序： .]BJM?9
LLJsBHi-
package org.rut.util.algorithm.support; cxxrvP-
'cf8VD
import org.rut.util.algorithm.SortUtil; aZL FsSY
.!Os'Y9[,
/** G;;iGN
* @author treeroot w6.J&O
* @since 2006-2-2 29k\}m7l<*
* @version 1.0 \q:PU6q
*/ }tPI#[cfK
public class HeapSort implements SortUtil.Sort{ F}4jm,w
Y-G;;~
/* (non-Javadoc) K2ry@haN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZJ}|t
*/ "uD^1'IW2
public void sort(int[] data) { Zl7m:b2M
MaxHeap h=new MaxHeap(); _.BX#BIF
h.init(data); uDG#L6
for(int i=0;i h.remove(); `AxhA.&V
System.arraycopy(h.queue,1,data,0,data.length); :\,3=suWq
} X-J<gI(Y
A!p70km2
private static class MaxHeap{ Y?V>%eBu
&&($LnyA]
void init(int[] data){ >TwL&la
this.queue=new int[data.length+1]; P*6&0\af|
for(int i=0;i queue[++size]=data; KHt.g`1:R
fixUp(size); `+EjmY
} Pt8 U0)i)
} Xw<Nnvz6
"~aCW~
private int size=0; ^r0mx{i&
Wj#Gm
private int[] queue; 5mF"nY&lI
IQQWp@w#8
public int get() { "P{T]
return queue[1]; ^n8r mh_%
} NRZ>03w
3qBZzM O*
public void remove() { @M]7',2"
SortUtil.swap(queue,1,size--); yf7$m_$C'
fixDown(1); i*Ee(m]I
} 9UeK}Rl^n
file://fixdown |\S p IFH1
private void fixDown(int k) { f iu?mb=*
int j; jwZBWt )5
while ((j = k << 1) <= size) { kc-v(WIC
if (j < size %26amp;%26amp; queue[j] j++; G9P)Y#WB
if (queue[k]>queue[j]) file://不用交换 nK5FPFz8
break; &[4lP~
SortUtil.swap(queue,j,k); K(B|o6[
k = j; gv,8Wo
} :,BKB*a\
} l*z.20^P
private void fixUp(int k) { 9?#L/
while (k > 1) { K\`>'C2_V
int j = k >> 1; J\x.:=V
if (queue[j]>queue[k]) WZJ}HHePr
break; I:G4i}mA
SortUtil.swap(queue,j,k); "8h7"WR
k = j; 2^C>orKQ0
} `+O7IyTMA
} q+Cq&|4 ?2
o$_,2$>mn
} }0?\H)/edP
B M$+r(#t
} `t~Zkb4>
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SortUtil： [Oy5Td7[
&p#$}tm
package org.rut.util.algorithm; {@w!kl~8
G@Y!*ZH*f
import org.rut.util.algorithm.support.BubbleSort; c})f&Z@<
import org.rut.util.algorithm.support.HeapSort; 5T4!'4n
import org.rut.util.algorithm.support.ImprovedMergeSort; ET 2@dY~
import org.rut.util.algorithm.support.ImprovedQuickSort; {`M 'ruy.%
import org.rut.util.algorithm.support.InsertSort; !*@sX7H
import org.rut.util.algorithm.support.MergeSort; xf]_@T;
import org.rut.util.algorithm.support.QuickSort; D<d4"*qo
import org.rut.util.algorithm.support.SelectionSort; O#962\
import org.rut.util.algorithm.support.ShellSort; y}t1r |p
hbg:}R=B<
/** $D)Ajd;
* @author treeroot MF["-GvP/
* @since 2006-2-2 oyeJ"E2
* @version 1.0 4]18=?r>
*/ Dw6mSsC/
public class SortUtil { I?_YL*
public final static int INSERT = 1; 3.?kxac
public final static int BUBBLE = 2; 7; e$ sr
public final static int SELECTION = 3; cq,0?2R`t
public final static int SHELL = 4; c$skLz
public final static int QUICK = 5; w`$M}oX(
public final static int IMPROVED_QUICK = 6; A%$ZB9#zQ
public final static int MERGE = 7; lmRdl>
public final static int IMPROVED_MERGE = 8; wjeuZNYf
public final static int HEAP = 9; OW|5IEC
da/Tms`T
public static void sort(int[] data) { IDIok~B=e
sort(data, IMPROVED_QUICK); -x?I6>{
} k6?;D_dm
private static String[] name={ [R~`6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nPU=n[t8O
}; J*} warf&
s}3`%?,6y
private static Sort[] impl=new Sort[]{ m=hUHA,p4
new InsertSort(), <)dHe:
new BubbleSort(), Ob#d;F
new SelectionSort(), uVn"'p-
new ShellSort(), OmR)W'
new QuickSort(), X5gI'u
new ImprovedQuickSort(), p2/Pj)2
new MergeSort(), TC+L\7
new ImprovedMergeSort(), ZcLW8L
new HeapSort() WQ1~9#
}; muJR~4
88l\8k4r
public static String toString(int algorithm){ }pMd/|A,
return name[algorithm-1]; 9cwy;au
} Z=&cBv4Fs
f6r~Ycf,f
public static void sort(int[] data, int algorithm) { $ rU"Krf67
impl[algorithm-1].sort(data); 1\aJ[t
} BHZCM^
zY=eeG+4s
public static interface Sort { vk&6L%_~a
public void sort(int[] data); ^I CSs]}1
} +'VSD`BR
Ey#7L M)
public static void swap(int[] data, int i, int j) { !\6<kQg#
int temp = data; f"}g5eg+
data = data[j]; ac%6eW0#
data[j] = temp; $%P?2g"j,
} 1R+/T
} FP_q?=~rFs