[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; 9y>dDNM\<
} GBHv| GO
int i1=l; b5No>U) /
int i2=mid+1; +a"MSPC4w
for(int cur=l;cur<=r;cur++){ x`WP*a7Fk]
if(i1==mid+1) x: `oqbd
data[cur]=temp[i2++]; P`@d8%*;
else if(i2>r) .,o=#
data[cur]=temp[i1++]; J5*krH2i
else if(temp[i1] data[cur]=temp[i1++]; pzg|?U
else (}V.xi
data[cur]=temp[i2++]; '.c[7zL
} Ldf<
} :+bQPzL
,gUSW
} &UEr4RK;I
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改进后的归并排序: W[AX?
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package org.rut.util.algorithm.support; %qV=PC
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import org.rut.util.algorithm.SortUtil; Xg^`fRg =T
UP58Cln*
/** X#Y0g`muW
* @author treeroot =XzrmPu
* @since 2006-2-2 GXr9J rs.e
* @version 1.0 K#%L6=t$<
*/ :p;!\4)u
public class ImprovedMergeSort implements SortUtil.Sort { Ew*_@hVC
<ZSH1~<{6
private static final int THRESHOLD = 10; "4<RMYQ
x{*g^f
/* kl?U2A.=
* (non-Javadoc) re2M!m6k5
* 4`I2tr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FDbb/6ku
*/ %\6|fKB4<
public void sort(int[] data) { :rk=(=@8`
int[] temp=new int[data.length]; fINF;TK
mergeSort(data,temp,0,data.length-1); qg7.E+
} ZNuz%VO
sX.L
private void mergeSort(int[] data, int[] temp, int l, int r) { EeIV6ug
int i, j, k; )D{L<.i_
int mid = (l + r) / 2; b^~ keQ
if (l == r) "_eHK#)
return; E/v.+m
if ((mid - l) >= THRESHOLD) <4ccTl
mergeSort(data, temp, l, mid); ` .|JTm[
else [a:yKJ[
insertSort(data, l, mid - l + 1); ,|D_? D)U
if ((r - mid) > THRESHOLD) Iojyku\W.
mergeSort(data, temp, mid + 1, r); Nj$3Ig"l
else qjFz}6
insertSort(data, mid + 1, r - mid); 8UJK]_99I,
q_bE?j{
for (i = l; i <= mid; i++) { VUpa^R
temp = data; eee77.@y-p
} cY8XA6
for (j = 1; j <= r - mid; j++) { |`+kZ-M*
temp[r - j + 1] = data[j + mid]; E (
} X;lL$
int a = temp[l]; 9UsA>m.
int b = temp[r]; )_k"_VVcC
for (i = l, j = r, k = l; k <= r; k++) { IppzQ0'=y1
if (a < b) { Ls< ";QJc
data[k] = temp[i++]; @<=xfs
a = temp; Uy2NZ%rnt
} else { "(zvI>A
data[k] = temp[j--]; #tg,%*.s
b = temp[j]; >Akrbmh5
} 9>yLSM,!rS
} YT'G#U1x~
} a"SH_+T{
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/** {; #u~e(W
* @param data H=Scrvfx
* @param l }{T9`^V:h
* @param i %sxLxx_x!
*/ 7r;7'X5
private void insertSort(int[] data, int start, int len) { Jmrs@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8mjPa^A
} v%v(-, _q
} '#RzX8|v<
} K2$ fKju
} kW#,o9f\
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堆排序： C))5,aX
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package org.rut.util.algorithm.support; t"x 8]Gy
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import org.rut.util.algorithm.SortUtil; 4wYD-MB
l r80RL'_
/** .1n=&d|
* @author treeroot 701a%Jq_2
* @since 2006-2-2 1P4cBw%
* @version 1.0 JjA3G`m=
*/ KZy2c6XO;
public class HeapSort implements SortUtil.Sort{ ~puXZCatN
I@Cq<:+(3
/* (non-Javadoc) :btb|^C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lS@0 $
*/ MDV<[${
public void sort(int[] data) { ?YE'J~0A6
MaxHeap h=new MaxHeap(); @Wgd(Ezd
h.init(data); TL&`Ywy
for(int i=0;i h.remove(); Vw-,G7v&E
System.arraycopy(h.queue,1,data,0,data.length); ,LI$=lJ@
} Z|3fhaT
(-S<9u-r
private static class MaxHeap{ mm}y/dO~}
Y-2IAJHS8
void init(int[] data){ 0lpkG ="&r
this.queue=new int[data.length+1]; 7egE."
for(int i=0;i queue[++size]=data; aa|u*afWQ
fixUp(size); UWU(6J|Fk
} q4u,pm,@
} m=Mb'<
(V&5EO8)
private int size=0; o>|&k]W/
S]!s)q-- z
private int[] queue; I=aoP}_
6/-]
public int get() { *vy^=Yea
return queue[1]; Ov$>CA
} |Gp!#D0b
L`'#}#O l
public void remove() { /ILj}g'
SortUtil.swap(queue,1,size--); OlU')0Y
fixDown(1); ->Z9j(JU
} 1Vf?Rw
file://fixdown ))T@U?r
private void fixDown(int k) { o<h2]TN
int j; D;nd_{%
while ((j = k << 1) <= size) { $4>(}
if (j < size %26amp;%26amp; queue[j] j++; k1lo{jw`
if (queue[k]>queue[j]) file://不用交换 5Zf^cou
break; :1*q}R
SortUtil.swap(queue,j,k); ;X_bDiG$
k = j; 9sP;s^#t7U
} &9Y ^/W
} <`$svM
private void fixUp(int k) { mpr_AL!ZO~
while (k > 1) { epicY
int j = k >> 1; m+UWvUB)
if (queue[j]>queue[k]) G2$<Q+UYs?
break; jz,K>
SortUtil.swap(queue,j,k); QhhL_vP
k = j; GB%kxtGD;\
} ,NO2{Ha$
} qt(+X
Hs:0j$
} mXYG^}
!hs33@*u~
} 2jf73$F
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SortUtil： p< Y-b,&
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package org.rut.util.algorithm; (]E0fjk
,.kJF4s&
import org.rut.util.algorithm.support.BubbleSort; U[0x\~[$K
import org.rut.util.algorithm.support.HeapSort; |,bP`Z
import org.rut.util.algorithm.support.ImprovedMergeSort; &\>=4)HB;
import org.rut.util.algorithm.support.ImprovedQuickSort; {MRXKnm;e
import org.rut.util.algorithm.support.InsertSort; Y#,&Tu
import org.rut.util.algorithm.support.MergeSort; s.X .SJ
import org.rut.util.algorithm.support.QuickSort; T,a71"c
import org.rut.util.algorithm.support.SelectionSort; ')Q
import org.rut.util.algorithm.support.ShellSort; c@E;v<r'
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/** DsB30
* @author treeroot Ucx"\/"
* @since 2006-2-2 z!M #
* @version 1.0 I4|LD/b
*/ jn 5v
public class SortUtil { eJ*u]GH U
public final static int INSERT = 1; t$Bu<frQ
public final static int BUBBLE = 2; q+znb'i-x
public final static int SELECTION = 3; 8(Cs<C!
public final static int SHELL = 4; KqN;a i,F
public final static int QUICK = 5; .@Lktc
public final static int IMPROVED_QUICK = 6; uTdx`>M,O
public final static int MERGE = 7; GE8.{P
public final static int IMPROVED_MERGE = 8; u`.3\Geh
public final static int HEAP = 9; o)bKs>` U
SK5_^4
public static void sort(int[] data) { 1> v(&;K
sort(data, IMPROVED_QUICK); <{+U- ^rzR
} w%?Zb[!&
private static String[] name={ Z%Pv,h'Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zfD@/kU
}; &cWC&Ws"
GlHP`&;UH
private static Sort[] impl=new Sort[]{ mm9uhlV8
new InsertSort(), =F2`X#x_j
new BubbleSort(), {2%'=v
new SelectionSort(), `;=-71Gn~
new ShellSort(), p[O\}MAd#
new QuickSort(), 86pA+c+U
new ImprovedQuickSort(), g~ii^[W
new MergeSort(), d,b]#fj
new ImprovedMergeSort(), 1COSbi]
new HeapSort() ken.#>w
}; SiYH@Wma
P L7(0b%
public static String toString(int algorithm){ QuP)j1"X
return name[algorithm-1]; Z2L7US-
} bv;.6C(T<
v.-r %j{I
public static void sort(int[] data, int algorithm) { D^QL.Du,
impl[algorithm-1].sort(data); K'}I?H~P_
} .kU}x3m
U(PW$\l
public static interface Sort { oTRidG
public void sort(int[] data); (rc7Cp3
} W}y)vrL
c1q;
public static void swap(int[] data, int i, int j) { Gshy$'_e
int temp = data; EJP]E)
data = data[j]; '6kD6o_p1
data[j] = temp; E/hT/BOPK
} cij8'("+!
} Kx?.g#>U;