[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; (&Rk#iU 2
} NGSts\D'}
int i1=l; '*mZ/O-
int i2=mid+1; qWheoyAB
for(int cur=l;cur<=r;cur++){ k\.9iI'6
if(i1==mid+1) t_jn-Idcf
data[cur]=temp[i2++]; Rtz~:v%
else if(i2>r) qsp.`9!
data[cur]=temp[i1++]; F-wAQ:
else if(temp[i1] data[cur]=temp[i1++]; rhbz|Uq
else V^n6~O
data[cur]=temp[i2++]; 2P^|juc)sU
} s{Qae=$Q
} h8asj0
wpM2{NTP
} wK-VA$;:
} 7 o!
改进后的归并排序: 4F|79U #
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package org.rut.util.algorithm.support; 7/IL" D
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import org.rut.util.algorithm.SortUtil; xyL)'C
B#S8j18M
/** 0fXMY-$I
* @author treeroot NUYKMo1ze
* @since 2006-2-2 (Of6Ij?
* @version 1.0 W+!UVUpW
*/ AE}cHBwZE
public class ImprovedMergeSort implements SortUtil.Sort { l;_IH|A
7j\^h2
private static final int THRESHOLD = 10; HK/WO jr
1v]%FC`
/* 49Jnp>h
* (non-Javadoc) =0d|F 8
* n8<?<-2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9)1Ye
*/ NSz}
public void sort(int[] data) { " _2k3
int[] temp=new int[data.length]; y<Q"]H.CkQ
mergeSort(data,temp,0,data.length-1); uVn"L:_
} Ahwi
^qR|lA@=\
private void mergeSort(int[] data, int[] temp, int l, int r) { X?'cl]1?
int i, j, k; +_7a/3kh
int mid = (l + r) / 2; :,0(aB
if (l == r) ~r.R|f]IQ
return; (L*GU7m;
if ((mid - l) >= THRESHOLD) jXE:aWQht
mergeSort(data, temp, l, mid); (0NffM1
else mp8GHV
insertSort(data, l, mid - l + 1); 88osWo6rG
if ((r - mid) > THRESHOLD) C12UZE;
mergeSort(data, temp, mid + 1, r); ae sk.
else a ~v$ bNu
insertSort(data, mid + 1, r - mid); xc#t8`
`xBoNQai
for (i = l; i <= mid; i++) { p3U)J&]c6
temp = data; Rsfb?${0G
} M9W zsWM
for (j = 1; j <= r - mid; j++) { r&E gP
temp[r - j + 1] = data[j + mid]; &" t~d}Rg
} w.k9{f
int a = temp[l]; t<##0#xS.
int b = temp[r]; FYYc+6n
for (i = l, j = r, k = l; k <= r; k++) { T%eBgseS
if (a < b) { JI-i7P
data[k] = temp[i++]; RJWO h
a = temp; w1)TnGT
} else { 2L](4Q[M
data[k] = temp[j--]; GM%OO)dO}
b = temp[j]; y8~OkdlN#
} e3;&
} %v8&
} v@Uk% O/
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/** VC88re`
* @param data $z%(He
* @param l >)ekb7
* @param i M 5sk&>
*/ h~k<"
private void insertSort(int[] data, int start, int len) { fmz"Zg9=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3@V?L:J
} A7X a
} $yASWz
} f=l/Fp}4UH
} S/`#6
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堆排序： MV"n{1B
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package org.rut.util.algorithm.support; d-~V.
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import org.rut.util.algorithm.SortUtil; G JRl{Y
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/** `yv?PlKL
* @author treeroot oPmz$]_Z
* @since 2006-2-2 2&4nf/sE
* @version 1.0 1VgGF^cYR
*/ WEj{2+
public class HeapSort implements SortUtil.Sort{ J 4gtm"2)
uy hh"[
/* (non-Javadoc) eC!=4_lx)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q%4X1 W
*/ S oeoUI]m
public void sort(int[] data) { k9x[( #
MaxHeap h=new MaxHeap(); RTc@`m3 M
h.init(data); ev$:7}h=
for(int i=0;i h.remove(); F\DiT|?}
System.arraycopy(h.queue,1,data,0,data.length); VP#KoX85
} C.S BJ
MI`qzC*%
private static class MaxHeap{ w6V/Xp][U
;|Mfq`s
void init(int[] data){ QOXo(S
this.queue=new int[data.length+1]; 3lp'U&3`5
for(int i=0;i queue[++size]=data; Lm4`O%
fixUp(size); J>A9]%M
} 01?+j%k=m/
} D0\>E}Y E
GmB&TDm
private int size=0; ,&UKsrs_
a dqS.xs
private int[] queue; ,->K)Rs;
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public int get() { 9w=7A>.U
return queue[1]; +7gd1^|$e
} v])ew|
`> %QCc\
public void remove() { gE6'A
SortUtil.swap(queue,1,size--); Ar!0GwE+
fixDown(1); t%Jk3W/f
} kGV:=h
file://fixdown MrR`jXz
private void fixDown(int k) { B.; qvuM~
int j; H'k}/<%Q
while ((j = k << 1) <= size) { %hSQ\T<8[o
if (j < size %26amp;%26amp; queue[j] j++; j,j|'7J%
if (queue[k]>queue[j]) file://不用交换 "TA0--6
break; LaQ7A,]
SortUtil.swap(queue,j,k); h+W$\T)
k = j; 'f6H#V*C
} ^bv^&V&IB
} q-`&C
private void fixUp(int k) { X84T F~2Y
while (k > 1) { =cEsv&i
int j = k >> 1; 3mHzOs\jU
if (queue[j]>queue[k]) lOt7ij(,L
break; e-rlk5k%f
SortUtil.swap(queue,j,k); MZV$YD^S
k = j; x4* bhiu
} +.!D>U$)}
} F^.A~{&L
fbh,V%t7
} NT+.E[J6
=^KgNQ
} |6Q5bV
8* A%k1+
SortUtil： v@=qVwX
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package org.rut.util.algorithm; S9Sgd&a9
P PJ^;s
import org.rut.util.algorithm.support.BubbleSort; p^8a<e?f~f
import org.rut.util.algorithm.support.HeapSort; xxur4@p!
import org.rut.util.algorithm.support.ImprovedMergeSort; xh2r?K@k>
import org.rut.util.algorithm.support.ImprovedQuickSort; y >=Y
import org.rut.util.algorithm.support.InsertSort; uN)c!='I
import org.rut.util.algorithm.support.MergeSort; {32m&a
import org.rut.util.algorithm.support.QuickSort; 7+P;s,mi7
import org.rut.util.algorithm.support.SelectionSort; :IZAdlz[@
import org.rut.util.algorithm.support.ShellSort; UH MJ(.Wa-
"J"=<_?
/** N0p6xg~
* @author treeroot a^%)6E.[,
* @since 2006-2-2 p3A9<g
* @version 1.0 LFax$CZc
*/ T]%-Ri
public class SortUtil { Y!L-5|G
public final static int INSERT = 1; t1hQ0B
public final static int BUBBLE = 2; E:K4k <
public final static int SELECTION = 3; $9X+dvu*
public final static int SHELL = 4; D|ceZ <9x
public final static int QUICK = 5; Eiu/p&ct
public final static int IMPROVED_QUICK = 6; 2K9X(th1
public final static int MERGE = 7; !'N@ZZ
public final static int IMPROVED_MERGE = 8; m54>}
public final static int HEAP = 9; %>&ex0j]
D"pT?\kO
public static void sort(int[] data) { @S@VsgQ%3Z
sort(data, IMPROVED_QUICK); 94w)Yln
} Q$U5[TZm
private static String[] name={ (X "J)xaQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hP)Zm%@0f
}; rn|]-^ku/
?>B?*IK!
private static Sort[] impl=new Sort[]{ t"4* ]S
new InsertSort(), p3Ux%/ZqPV
new BubbleSort(), 1b3 a(^^E
new SelectionSort(), DKjiooD
new ShellSort(), .Exvuo`F
new QuickSort(), f]i"tqoI
new ImprovedQuickSort(), =6~
new MergeSort(), w x]?D%l
new ImprovedMergeSort(), Onq^|r's&
new HeapSort() `PbY(6CF
}; DO(};R%=
8_}t,BC
public static String toString(int algorithm){ oMEW5.VX
return name[algorithm-1]; 0''p29
} P\MDD@
Q` &#u#
public static void sort(int[] data, int algorithm) { s6~;)(r
impl[algorithm-1].sort(data); }? _KZ)
} SZW_V6\t>
<mFDC?j
public static interface Sort { HFFG4'
public void sort(int[] data); DT`HS/~fH
} ;}SGJ7
M*0^<e~]F
public static void swap(int[] data, int i, int j) { q? ">
int temp = data; bh@CtnO
data = data[j]; 9I/l+IS"X
data[j] = temp; PRU&y/zZmG
} -W9DH^EL<
} Nud =K'P=