[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; ;MR(Eaep
} ~?)ST?&
int i1=l; mT2Fn8yC1
int i2=mid+1; UF00K1dbz
for(int cur=l;cur<=r;cur++){ &<sN(;%0R
if(i1==mid+1) z2lEHa?w
data[cur]=temp[i2++]; ( nH3
else if(i2>r) &ii3Vlyzg
data[cur]=temp[i1++]; )cy_d!
else if(temp[i1] data[cur]=temp[i1++]; M(2c{TT
else }Myi0I<
data[cur]=temp[i2++]; )0:@T)G
} A;A>Q`JJF
} to
'j+J?Y^
} }~RH!Q1
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改进后的归并排序: 8HyK;+ZkVd
ei8OLcw:x
package org.rut.util.algorithm.support; ?*Kewj
#'-L`])7uw
import org.rut.util.algorithm.SortUtil; &\0`\#R
vO)nqtw
/** 2ajQ*aNq
* @author treeroot MyOdWD&7
* @since 2006-2-2 q)uq?sZe
* @version 1.0 ci^+T *
*/ ;?9u#FRtw
public class ImprovedMergeSort implements SortUtil.Sort { p&L`C|0
hfGA7P"
private static final int THRESHOLD = 10; m"!!)
v?\bvg\E
/* 5"[Qs|VjA6
* (non-Javadoc) &OiJJl[9
* l}?'U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 24Y~x`W
*/ Z;_WU
public void sort(int[] data) { #n'tpp~O
int[] temp=new int[data.length]; @,-xaZ[
mergeSort(data,temp,0,data.length-1); !=.5$/
} \7}X^]UVx
Xa2QtJq
private void mergeSort(int[] data, int[] temp, int l, int r) { ~T')s-,l,:
int i, j, k; 5s>$
int mid = (l + r) / 2; sYt8NsQ
if (l == r) 3H%oTgWk
return; K@6tI~un
if ((mid - l) >= THRESHOLD) C`D5``4
mergeSort(data, temp, l, mid); uE>2*u\
else ipEsR/O
insertSort(data, l, mid - l + 1); *fq=["O
if ((r - mid) > THRESHOLD) Ywf.,V
mergeSort(data, temp, mid + 1, r); |/g\N,]
else Zjt3U;Y
insertSort(data, mid + 1, r - mid); j+n1k^jC
7:1c5F~M
for (i = l; i <= mid; i++) { 1X/ q7lR
temp = data; e/WR\B'1
} J*8fGR%
for (j = 1; j <= r - mid; j++) { WZ'3
temp[r - j + 1] = data[j + mid]; $+sNjwv^F
} N"b>]Ab] ;
int a = temp[l]; M[0@3"}}
int b = temp[r]; w*ig[{ I
for (i = l, j = r, k = l; k <= r; k++) { Ftm%@S?
if (a < b) { YXJjqH3
data[k] = temp[i++]; 'hL\xf{
a = temp; v!ULErs
} else { gJ>?<F;
data[k] = temp[j--]; O1@xF9<
b = temp[j]; aF$HF;-y
} 3_IuK6K2
} }@V(y9K
} #`/KF_a3\>
5isejR{r
/** }abM:O "Y
* @param data Ku_`F2Q
* @param l <Ja>
* @param i ,k/*f+t
*/ +GWeu0b(~
private void insertSort(int[] data, int start, int len) { -lyT8qZ:(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4.7ePbk[E
} pd,5.d
} kzGD*
} fw_V'l#\
} `ejE)VL=8h
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堆排序： pHY~_^B4&
jj#K[@u
package org.rut.util.algorithm.support; v\t$. _at
LI?rz<H!D
import org.rut.util.algorithm.SortUtil; o\8yYX
0?ZJJdI3
/** _ 9Tv*@
* @author treeroot 5-bd1!o
* @since 2006-2-2 QdG_zK>|e
* @version 1.0 9S.Uo[YY
*/ pSASMc@
public class HeapSort implements SortUtil.Sort{ }@}jwi)l
y1/$dn
/* (non-Javadoc) A[Juv]X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p,@_A'
*/ u Y/Q]NT
public void sort(int[] data) { ow ~(k5k:
MaxHeap h=new MaxHeap(); yjpV71!M
h.init(data); ?K{CjwE.M
for(int i=0;i h.remove(); kVQKP U
System.arraycopy(h.queue,1,data,0,data.length); x+"~-KO8q$
} DVRE;+Jt
m"~$JA u
private static class MaxHeap{ +is;$1rq
N>7INK
void init(int[] data){ `RfhxzI
this.queue=new int[data.length+1]; cgm]{[f
for(int i=0;i queue[++size]=data; ]~)FMWQz-
fixUp(size); j|KZ HH%dc
} /_?Ly$>'
} gec<5Ewg
zMKW@
private int size=0; ju(&v*KA
p}!rPd*
private int[] queue; VLN=9
:sFP{rFx~
public int get() { 7Rk eV
return queue[1]; |~W!Y\l-
} DTt/nmKAqJ
#~q{6()e:
public void remove() { g%#" 5Kr
SortUtil.swap(queue,1,size--); !SD?
fixDown(1); 2IqsBK`
} w:Tz&$&Y$
file://fixdown 93[c^sc9*a
private void fixDown(int k) { v$w!hYsQ
int j; ?Il$f_"B:
while ((j = k << 1) <= size) { ]6p?mBuQ
if (j < size %26amp;%26amp; queue[j] j++; kp[+Iun?
if (queue[k]>queue[j]) file://不用交换 G#8HY VF
break; qn6Y(@<[
SortUtil.swap(queue,j,k); f$NudG!S
k = j; [(w_!|S
} ^/2n[orl5
} P6zy<w
private void fixUp(int k) { V(A6>0s$|
while (k > 1) { 7<oLe3fbM
int j = k >> 1; E:f0NV3"1
if (queue[j]>queue[k]) Jt.dR6,
break; q*\#HC
SortUtil.swap(queue,j,k); )Rn}4)9!iT
k = j; 7:I` ~ @m
} j{IAZs#@>
} +L!-JrYHS4
\('8_tqI"
} _LFZ0
{ o=4(RC
} I`}-*%ki(
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SortUtil： "6lf~%R"
^* ^te+N
package org.rut.util.algorithm; {%'(IJ|5z
]YQlCx`
import org.rut.util.algorithm.support.BubbleSort; B8'" ^a^&-
import org.rut.util.algorithm.support.HeapSort; xpKD 'O=T
import org.rut.util.algorithm.support.ImprovedMergeSort; lq}=&)%C
import org.rut.util.algorithm.support.ImprovedQuickSort; +iir]"8
import org.rut.util.algorithm.support.InsertSort; !,+peMy
import org.rut.util.algorithm.support.MergeSort; 5v=%pQbY
import org.rut.util.algorithm.support.QuickSort; @O5-w
import org.rut.util.algorithm.support.SelectionSort; `ux U H#
import org.rut.util.algorithm.support.ShellSort; D:U:( pg
n@mWBUM
/** }>=k!l{
* @author treeroot {^1GHU
* @since 2006-2-2 \Q|1I
* @version 1.0 Bl2y~fCA
*/ 5. 5
public class SortUtil { fKf5i@CvB@
public final static int INSERT = 1; G\?fWqx
public final static int BUBBLE = 2; ((\s4-
public final static int SELECTION = 3; 81fpeoNO
public final static int SHELL = 4; G%
public final static int QUICK = 5; En&ESWN
public final static int IMPROVED_QUICK = 6; =LL5E}xP
public final static int MERGE = 7; B t-o:)pa
public final static int IMPROVED_MERGE = 8; AKC';J
public final static int HEAP = 9; O7I:Y85i#O
0PIC|
public static void sort(int[] data) { $U<so{xn%
sort(data, IMPROVED_QUICK); b-'41d}Hn
} R)"Ds}1G
private static String[] name={ znw\Dn?g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @Nn9-#iW
}; OWxYV$
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private static Sort[] impl=new Sort[]{ ]vMr@JM-G
new InsertSort(), x1W<r)A )r
new BubbleSort(), ^rMkCA@;TZ
new SelectionSort(), a?.hvI
new ShellSort(), \C5YVl#
new QuickSort(), k)UF.=$d
new ImprovedQuickSort(), f ."bq43(
new MergeSort(), Wjn1W;m&g
new ImprovedMergeSort(), >c*}Do{lG
new HeapSort() !s06uh
}; w?d~c*4+
QM=M<~<Voh
public static String toString(int algorithm){ Q>] iRx>MZ
return name[algorithm-1]; {1;j1|CI
} ya0L8`q
s"#JBw\7
public static void sort(int[] data, int algorithm) { O6NgI2[O
impl[algorithm-1].sort(data); w,cfSF;=tC
} .8S6;xnkC
NOLw119K
public static interface Sort { im_WTZz2P
public void sort(int[] data); Jiyt,D*wX
} (|I:d!>:U
"ys#%,Z
public static void swap(int[] data, int i, int j) { Xi^3o
int temp = data; {5QIQ
data = data[j]; IqJ7'X
data[j] = temp; 4d#w}
} :^tw!U%y1
} j-8v$0'