[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; q>[% C5
} :9#`|#uh
int i1=l; Zb 2
int i2=mid+1; wI4;/w>
for(int cur=l;cur<=r;cur++){ Lm?*p>\Q
if(i1==mid+1) G4}q*&:k
data[cur]=temp[i2++]; wgyO%
else if(i2>r) hG@ys5
data[cur]=temp[i1++]; `[KhG)Y7t
else if(temp[i1] data[cur]=temp[i1++]; TH|hrL;:8
else QdTe!f|
data[cur]=temp[i2++]; AH`15k_i
} </X"*G't
} $imx-H`|
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} _E;Y ~I,i
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改进后的归并排序: `@M4THt
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package org.rut.util.algorithm.support; ]'Yw#YB
R u5&xIQ
import org.rut.util.algorithm.SortUtil; V.#8-?z
FT;JYkO
/** J$Epj
* @author treeroot G|lI=Q3f
* @since 2006-2-2 !_) ^bRd
* @version 1.0 3~Ln:4[6ID
*/ w#T,g9
public class ImprovedMergeSort implements SortUtil.Sort { s]c$]&IGG
&[RU.Q!_H
private static final int THRESHOLD = 10; 8:% R|b
!d\GD8|4
/* #+ '@/5{n
* (non-Javadoc) m3!M L>nLt
* ~N9-an
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {9".o,
*/ F29AjW86
public void sort(int[] data) { 1%"` =$q%
int[] temp=new int[data.length]; _zh5KP[{
mergeSort(data,temp,0,data.length-1); lc-|Q#$3$
} Xt =bc
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private void mergeSort(int[] data, int[] temp, int l, int r) { [QbXj0en$
int i, j, k; .Qt3!ek
int mid = (l + r) / 2; gN(hv.nQ
if (l == r) <gLtX[v!CL
return; 05B+WJ1
if ((mid - l) >= THRESHOLD) m;f?}z_\$
mergeSort(data, temp, l, mid); }qhK.e
else 5$U>M
insertSort(data, l, mid - l + 1); kW&Z%k
if ((r - mid) > THRESHOLD) qD*\}b]9I
mergeSort(data, temp, mid + 1, r); sK0VT"7K
else l7,qWSsnK
insertSort(data, mid + 1, r - mid); Zk UuniO
V^I/nuy
for (i = l; i <= mid; i++) { t5X lR]` w
temp = data; ]?(F'&
} n-3j$x1Ne
for (j = 1; j <= r - mid; j++) { lM^!^6=v0l
temp[r - j + 1] = data[j + mid]; A.9'pi'[9Q
} =jc8=h[F<
int a = temp[l]; V1)P=?%(US
int b = temp[r]; lmKq xs4
for (i = l, j = r, k = l; k <= r; k++) { \!Zh="hN
if (a < b) { 2j7d$y*'
data[k] = temp[i++]; %J7mZB9
a = temp; v8bl-9DQ
} else { xsDa!
data[k] = temp[j--]; <C%-IZv$
b = temp[j]; (V.,~t@
} $sF#Na4^
} !9xANSb
} j9ta0~x1*6
4V|z)=)A
/** yM:~{;HLF
* @param data O6,"#BX
* @param l !u4Z0!Ll
* @param i FJ~_0E#L
*/ ]H#Rm#q
private void insertSort(int[] data, int start, int len) { s9kLB.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U?fN3
} H r^15
} )_*a7N!
} \h7J/es^p!
} ?w37vsN
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堆排序： D4Y!,7WEVt
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package org.rut.util.algorithm.support; _:X|R#d
(GEi<\16[
import org.rut.util.algorithm.SortUtil; (1AA;)`Kp
Di<J6xu
/** `JWYPsWk
* @author treeroot } ndvV~*1
* @since 2006-2-2 K=Z]#bm
* @version 1.0 0*Km}?;0-
*/ `bZU&A(`Be
public class HeapSort implements SortUtil.Sort{ E)Qh]:<2v
PR@4' r|a
/* (non-Javadoc) ]Uu(OI<)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .\~P -{Hd
*/ w$lfR,
public void sort(int[] data) { 4nII/cPG
MaxHeap h=new MaxHeap(); z[\W\g*|ri
h.init(data); FW)^O%2s
for(int i=0;i h.remove(); I0w@S7
System.arraycopy(h.queue,1,data,0,data.length); '!^E92
} N _~KZQ11^
sb|3|J6=
private static class MaxHeap{ Q;XHHk
O<dZA=Oez
void init(int[] data){ p~q_0Pg%
this.queue=new int[data.length+1]; RUk<=!U
for(int i=0;i queue[++size]=data; ()C^ta_]
fixUp(size); g)9JO6]
} Krr?`n
} $}^\=p}X
N=Uc=I7C
private int size=0; @ojg`!,
h76NR
private int[] queue; Dl zmAN
Jn[q<e"
public int get() { LPapD@Z
return queue[1]; t}XB|h
} otz_nF;E
762o~vY6$
public void remove() { yxCMl.
SortUtil.swap(queue,1,size--); n4vXm
fixDown(1); 3j+=3n,
} nI*(a:
file://fixdown t?9;cS4
private void fixDown(int k) { i_0,BVC
int j; WAwfL?
while ((j = k << 1) <= size) { 9*=@/1
if (j < size %26amp;%26amp; queue[j] j++; HTDyuqs
if (queue[k]>queue[j]) file://不用交换 1akD]Z
break; YMj7
SortUtil.swap(queue,j,k); )&Kn(l)
k = j; +e0dV_T_>
} | or 8d>,
} fXu~69_
private void fixUp(int k) { P34LV+e
while (k > 1) { xxLgC;>[
int j = k >> 1; `rz`3:ZH
if (queue[j]>queue[k]) CRc!|?
break; xH"W}-#[
SortUtil.swap(queue,j,k); ?GUz?'d
k = j; Ez/\bE
} r*i$+ Z
} kMl@v`
6+Wr6'kuH
} .*EOVo9S
R0Ax$Cv{
} ,5eH2W
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SortUtil： Sv~YFS :oy
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package org.rut.util.algorithm; *R_'$+
>9o,S3
import org.rut.util.algorithm.support.BubbleSort; z"6ZDC6
import org.rut.util.algorithm.support.HeapSort; (#j2P0B
import org.rut.util.algorithm.support.ImprovedMergeSort; 4f4 i1i:
import org.rut.util.algorithm.support.ImprovedQuickSort; Ad]<e?oN=
import org.rut.util.algorithm.support.InsertSort; ]RH=s7L
import org.rut.util.algorithm.support.MergeSort; U`bC>sCp
import org.rut.util.algorithm.support.QuickSort; _W@,@hOH
import org.rut.util.algorithm.support.SelectionSort; =2RhPD
import org.rut.util.algorithm.support.ShellSort; <qbZG}u
M^j<J0(O
/** F!OOrW]p0
* @author treeroot a%7"_{s1
* @since 2006-2-2 1<LC8?wt
* @version 1.0 ;[{:'^n
*/ 9RG\UbX)^|
public class SortUtil { vp\PYg;x
public final static int INSERT = 1; ! Q|J']|
public final static int BUBBLE = 2; JqI6k6~Q^
public final static int SELECTION = 3; c }<*~w;
public final static int SHELL = 4; ~vW)1XnK
public final static int QUICK = 5; S|K|rDr0n
public final static int IMPROVED_QUICK = 6; >]Mq)V9
public final static int MERGE = 7; >AR Tr'B
public final static int IMPROVED_MERGE = 8; -"~L2f"?
public final static int HEAP = 9; j~,h)C/v
GB&Nt{
public static void sort(int[] data) { 94T}iY.
sort(data, IMPROVED_QUICK); )u39}dpeu
} <@u0.-]
private static String[] name={ 5TXg;v#Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KY4d+~2
}; _MM
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private static Sort[] impl=new Sort[]{ BN+V,W
new InsertSort(), !Oeq G
new BubbleSort(), La`h$=#`
new SelectionSort(), wzD\8_;6N
new ShellSort(), 2}^+]5
new QuickSort(), JQ*D
new ImprovedQuickSort(), GN\8![J
new MergeSort(), wl7 MfyU
new ImprovedMergeSort(), !2GHJHxv]c
new HeapSort() xK$}QZ)
}; /a@ kS
Y3-]+y%l
public static String toString(int algorithm){ q{a#HnZo"
return name[algorithm-1]; e{,!|LhpQ
} yJnPD/i
]UK`?J=t2g
public static void sort(int[] data, int algorithm) { ^F>4~68d
impl[algorithm-1].sort(data); ^Vag1(hdq
} f"Ost;7zg
60`+9(^
public static interface Sort { fph-v-cl
public void sort(int[] data); n`P`yb\f$
} T1l&B
W;^N8ap%
public static void swap(int[] data, int i, int j) { %)pP[[h
int temp = data; Hab!qWK`
data = data[j]; OZG0AX+=#
data[j] = temp; 66oK3%[
} pPoH5CzcK
} ?K0U3V$s