[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; VHxBs
} ^.6[vmmq
int i1=l; ( zWBrCX
int i2=mid+1; <0})%V?-
for(int cur=l;cur<=r;cur++){ X:oOp=y]|
if(i1==mid+1) Zz0bd473k?
data[cur]=temp[i2++]; FJ_7<4ET
else if(i2>r) <y@vv
data[cur]=temp[i1++]; 1Cw]~jh
else if(temp[i1] data[cur]=temp[i1++]; Y;/@[AwF
else aUaeK(x:H
data[cur]=temp[i2++]; 6kYluV+j
} X`.##S KC
} {y9G "
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} J8qFdNK
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改进后的归并排序: jr=9.=jI8k
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package org.rut.util.algorithm.support; iH8we,s'
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import org.rut.util.algorithm.SortUtil; B*Tn@t W
jH< #)R
/** 1&|]8=pG7
* @author treeroot {DRk{>K,
* @since 2006-2-2 *?FVLE
* @version 1.0 .d<K`.O;
*/ UxGu1a
public class ImprovedMergeSort implements SortUtil.Sort { (BEe^]f
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private static final int THRESHOLD = 10; lq-KM8j
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/* ~*HQPp?v
* (non-Javadoc) w"j>^#8
* |V a:*3u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'Aq^z%|
*/ P([!psgu
public void sort(int[] data) { ], lLDUZ\
int[] temp=new int[data.length]; 5W&L6.J}+
mergeSort(data,temp,0,data.length-1); 2][9Wp
} danPy2
B[N]=V
private void mergeSort(int[] data, int[] temp, int l, int r) { ~/L:$
int i, j, k; (!* l+}
int mid = (l + r) / 2; *ERV\/
if (l == r) _4by3?<c
return; J :O!4gI
if ((mid - l) >= THRESHOLD) cYA:k
mergeSort(data, temp, l, mid); e$[O J<t
else ,Y:oTo=~
insertSort(data, l, mid - l + 1); ,Kv6!ib6Q
if ((r - mid) > THRESHOLD) # EvRm
mergeSort(data, temp, mid + 1, r); 0~U#DTx0
else \D@j`o
insertSort(data, mid + 1, r - mid); Z[#8F&QV!m
Z)7{~xq
for (i = l; i <= mid; i++) { &qx/ZT
temp = data; 9hzu!}~'I
} Nf| 0O\+%y
for (j = 1; j <= r - mid; j++) { 9^a|yyzL
temp[r - j + 1] = data[j + mid]; %Psg53N
} E=I'$*C\D
int a = temp[l]; }>{R<[I!G
int b = temp[r]; &W\e 5X<A
for (i = l, j = r, k = l; k <= r; k++) { xrf|c
if (a < b) { [U&k"s?
data[k] = temp[i++]; _}F&^
a = temp; y!b"Cj
} else { f)Qln[/
data[k] = temp[j--]; \@@G\\)er
b = temp[j]; "yu{b]AU
} A[l )>:
} ?/.])'&b
} HxO+JI`'3
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/** Ichg,d-M-K
* @param data Zz0er|9]Q
* @param l zK6w0
* @param i q /JC\
*/ sX"L\v
private void insertSort(int[] data, int start, int len) { N3u06
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); EID-ROMO
} F$UL.`X _/
} 1)~|{X+~
} OC&BJNOi
} EB3/o7)L
f&vMv.
堆排序： jRsl/dmy
Tb]7# v
package org.rut.util.algorithm.support; ;mpYcpI
ja9u?UbW
import org.rut.util.algorithm.SortUtil; ]!TE
bPTtA;u
/** -|V#U`mwF
* @author treeroot H,D5)1Uu
* @since 2006-2-2 JZ}zXv
* @version 1.0 S<T'B0r8
*/ ?=7k<a~
public class HeapSort implements SortUtil.Sort{ }XUL\6U
z?DCQ
/* (non-Javadoc) yy5|8L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xm,fyk>
*/ g[~{iu_$d
public void sort(int[] data) { y(DT^>0
MaxHeap h=new MaxHeap(); CzlG#?kU?2
h.init(data); &<><4MQ
for(int i=0;i h.remove(); M[qhy.
System.arraycopy(h.queue,1,data,0,data.length); +(!/(2>~
} uihH")Mo
\:@6(e Bh
private static class MaxHeap{ Wrp~OF0k
y{M7kYWtHV
void init(int[] data){ o}=*E
this.queue=new int[data.length+1]; P].Eb7I
for(int i=0;i queue[++size]=data; k{r<S|PK0
fixUp(size); ;=joQWNDm
} !Ge;f/@
} ]EK(k7nH
.c>6}:ye
private int size=0; mx)!]B"
%oqKpD+
private int[] queue; f%PLR9Nh5@
2|"D\N
public int get() { f I%8@ :
return queue[1]; GJWGT`"
} 0=&S?J#!
R?1Z[N
public void remove() { o~'p&f
SortUtil.swap(queue,1,size--); ^Zvb3RJg
fixDown(1); a=W%x{
} )&E]
file://fixdown 3*Q=)}
private void fixDown(int k) { -"zW"v)\
int j; ;'Hu75ymo
while ((j = k << 1) <= size) { r\QV%09R
if (j < size %26amp;%26amp; queue[j] j++; E q4tcZ
if (queue[k]>queue[j]) file://不用交换 #6a!OQj
break; 8d$|JN;)
SortUtil.swap(queue,j,k); xbi\KT`~
k = j; ZklO9Ox(
} T 9`AL
} jW7ffb `O
private void fixUp(int k) { ;o'>`=Y
while (k > 1) { )*_G/<N)|
int j = k >> 1; .(/HUQn
if (queue[j]>queue[k]) V0D&bN*
break; 8Vz!zYl
SortUtil.swap(queue,j,k); @_t=0Rc
k = j; n;Mk\*Cg
} q0q-Coh>
} ?Sh"%x
)o:sDj`b]
} 8N)Lck2PR
\s[L=^!
} K. B\F)K
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SortUtil： l1kHFeq
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package org.rut.util.algorithm; }Tk:?U{
W;8A{3q%N0
import org.rut.util.algorithm.support.BubbleSort; eaO'|@;{~
import org.rut.util.algorithm.support.HeapSort; 9_==C"F
import org.rut.util.algorithm.support.ImprovedMergeSort; 1?w=v|b:P)
import org.rut.util.algorithm.support.ImprovedQuickSort; i+5Qs-dHA
import org.rut.util.algorithm.support.InsertSort; 6Br^Ugy
import org.rut.util.algorithm.support.MergeSort; N?t*4Y
import org.rut.util.algorithm.support.QuickSort; xtCMK1# x
import org.rut.util.algorithm.support.SelectionSort; u`wD6&y*
import org.rut.util.algorithm.support.ShellSort; KC&XOI %
)-"<19eu
/** ]35`N<Ac
* @author treeroot MA_YMxP.'
* @since 2006-2-2 M._E$y,5
* @version 1.0 "c} en[
*/ 4S*ifl
public class SortUtil { <BT18u\
public final static int INSERT = 1; Kn3Xn`P?
public final static int BUBBLE = 2; R`$Y]@i&B
public final static int SELECTION = 3; 59$PWfi-\
public final static int SHELL = 4; ?7pn%_S
public final static int QUICK = 5; I++ Le%w
public final static int IMPROVED_QUICK = 6; .Y2Hd$rs
public final static int MERGE = 7; NRG06M
public final static int IMPROVED_MERGE = 8; $Tv~ *|a
public final static int HEAP = 9; @r[SqGa:
mW{uChHP
public static void sort(int[] data) { $,O8SW.O$
sort(data, IMPROVED_QUICK); &\ca ? #
} ]#DCO8Vk
private static String[] name={ u(yN81
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ohj^Z&j
}; b00$3,L
1p5'.~J+Q
private static Sort[] impl=new Sort[]{ \:F$7 *Ne
new InsertSort(), fe<7D\Sp@
new BubbleSort(), Y=|20Y\K
new SelectionSort(), 2%fzRXhu%
new ShellSort(), ~tTn7[!
new QuickSort(), s>G]U)d<'
new ImprovedQuickSort(), W;T0_=
new MergeSort(), D^h! ].3 T
new ImprovedMergeSort(), ,_H H8[&
new HeapSort() ah<p_qe9|
}; %m/lPL
j;48Yya'
public static String toString(int algorithm){ &?Erkc~#
return name[algorithm-1]; UW}@oP$r
} 7xB]Z;:
>Vx_Xv`Jwb
public static void sort(int[] data, int algorithm) { byE0Z vDM
impl[algorithm-1].sort(data); l'Za"TL:
} jmgkY)rb R
)c*xKij
public static interface Sort { [?:MIl#!
public void sort(int[] data); hC8WRxEGq
} 8a@k6OZ
OY(CB(2N
public static void swap(int[] data, int i, int j) { <K&A/Ue
int temp = data; ld#x'/
data = data[j]; {[:C_Up)f
data[j] = temp; raOuD3
} N LQ".mM+
} irm4lb5