[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; <va3Ly)c&
} I0 a,mO;m
int i1=l; v8"plx=3
int i2=mid+1; \P]w^
for(int cur=l;cur<=r;cur++){ Ev;HV}G
if(i1==mid+1) M:|Z3p K
data[cur]=temp[i2++]; H8~<;6W
else if(i2>r) J#B% #X
data[cur]=temp[i1++]; {S(d5o8
else if(temp[i1] data[cur]=temp[i1++]; E4RvVfA0F
else C.V")D=
data[cur]=temp[i2++]; [-!
} I_@\O!<y}
} 2't<Hl1qN
cZKK\hf<
} !=@Lyt)_b
S!qJqZ<Bv
改进后的归并排序: `k65&]&d
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package org.rut.util.algorithm.support; ?)x>GB(9ZN
!YL|R[nDH|
import org.rut.util.algorithm.SortUtil; yfeX=h
)n 1b
/** Ddde,WJA
* @author treeroot ~H/|J^ J
* @since 2006-2-2 J@Eqqyf"
* @version 1.0 98h,VuKVaB
*/ KE:PRX
public class ImprovedMergeSort implements SortUtil.Sort { T1hr5V<U
~U`oew
private static final int THRESHOLD = 10; B"TZ8(<
Z8nj9X$
/* \]}|m<R
* (non-Javadoc) 1a3rA
* ~\`lbGJ7?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !s#25}9zX5
*/ qd"1KzQWO
public void sort(int[] data) { Ar4E $\W
int[] temp=new int[data.length]; LAeJz_9U
mergeSort(data,temp,0,data.length-1); g1VdP[Y#
} LY2oBX@fC
kA?a}
private void mergeSort(int[] data, int[] temp, int l, int r) { Yu-e|:
int i, j, k; #+HLb
int mid = (l + r) / 2; w\k|^
if (l == r) C J S
return; )ALPMmlRs
if ((mid - l) >= THRESHOLD) M>dP 1
mergeSort(data, temp, l, mid); I&]d6,
else HXhz|s0
insertSort(data, l, mid - l + 1); 'Ca6cm3Tg
if ((r - mid) > THRESHOLD) \bqIe}3V7
mergeSort(data, temp, mid + 1, r); b{<qt})
else .MkHB0 2N
insertSort(data, mid + 1, r - mid); #pP4\n-~hU
F<q'ivj:w
for (i = l; i <= mid; i++) { m\`dLrPX4j
temp = data; zF6R\w
} %`%oupqm+
for (j = 1; j <= r - mid; j++) { !"/]<OQ
temp[r - j + 1] = data[j + mid]; 3^ ~M7=k
} K[0.4+
int a = temp[l]; 5G=<2;
int b = temp[r]; 8A}w}h
for (i = l, j = r, k = l; k <= r; k++) { dt(~)*~R
if (a < b) { ;]zV ?9
data[k] = temp[i++]; K,e"@G
a = temp; 0UZ>y/ C)=
} else { fyPpzA0
data[k] = temp[j--]; ^I03PIy0l
b = temp[j]; 9Z]~c^UB
} o&P}GcEIw
} $&/JY
} Y-\hV6v6
}S51yDVG_
/** tFt56/4
* @param data zY~
* @param l 5vs~8|aRo
* @param i 6nh!g
*/ |niYN7 17
private void insertSort(int[] data, int start, int len) { B*7Y5_N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xgHR;USH
} "MHm9D?5
} Y$hYW
} ~$n4Yuu2[
} `v3WJ>Q!N?
H-A?F^#
堆排序： |D+"+w/
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package org.rut.util.algorithm.support; r_nB-\
Qb<i,`SN
import org.rut.util.algorithm.SortUtil; Qd;P?W6
a5=8zO#%g
/** DhZuQpH
* @author treeroot G n"]<8yl~
* @since 2006-2-2 |N_tVE
* @version 1.0 m3W:\LTTp
*/ ST$~l7p
public class HeapSort implements SortUtil.Sort{ g^|}e?
!.1oW(
/* (non-Javadoc) ^Pl(V@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Oxs O
*/ }a?PBo`
public void sort(int[] data) { D\|$!i}
MaxHeap h=new MaxHeap(); m=D2|WA8
h.init(data); yO*~)ALb+
for(int i=0;i h.remove(); NRu_6~^^
System.arraycopy(h.queue,1,data,0,data.length); i ,Cvnp6Lv
} eKjmU| H
.j?`U[V%a
private static class MaxHeap{ ws8@yr<R
I?`}h}7.
void init(int[] data){ P^V,"B8t
this.queue=new int[data.length+1]; ;6S,|rC]
for(int i=0;i queue[++size]=data; XN9s!5A<L)
fixUp(size); Y~\71QE>
} su;u_rc,
} R<.<wQ4I
~hK7(K
private int size=0; F.5'5%
Z(DCR/U=(>
private int[] queue; d: D`rpcC
oV"d%ks
public int get() { xxjg)rVuy
return queue[1]; xCN6?
} D.d(D:
ZrY#B8
public void remove() { p}q27<O*/
SortUtil.swap(queue,1,size--); $ N`V%<W
fixDown(1); !5,>[^y3
} hRAI7xk
file://fixdown e_'/4 n
private void fixDown(int k) { AGaM &x=
int j; BS3Aczwk
while ((j = k << 1) <= size) { ,=sbK?&
if (j < size %26amp;%26amp; queue[j] j++; pde,@0(Fa
if (queue[k]>queue[j]) file://不用交换 q#LB 2M
break; >[t0a"
SortUtil.swap(queue,j,k); ^u'hl$`^
k = j; "XPBNv\>_
} ,b[}22
} $!Z><&^/
private void fixUp(int k) { l{b<rUh5W
while (k > 1) { .OhpItn
int j = k >> 1; m2c>RCq
if (queue[j]>queue[k]) @1+C*
break; &\<!{Y<'
SortUtil.swap(queue,j,k); k(hYNmmo j
k = j; C]S~DK1
} z4t.-9(C
} 7AwV4r*:
[5[}2B_t
} F`!B!uY
J|*Z*m
} -s~6FrKy
y?=W
SortUtil： $ti*I;)h4
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package org.rut.util.algorithm; &O|!w&
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import org.rut.util.algorithm.support.BubbleSort; hxG=g6:G
import org.rut.util.algorithm.support.HeapSort; V|6PKED
import org.rut.util.algorithm.support.ImprovedMergeSort; +'fy%/
import org.rut.util.algorithm.support.ImprovedQuickSort; /<[S> ;!kr
import org.rut.util.algorithm.support.InsertSort; &6]+a4
import org.rut.util.algorithm.support.MergeSort; '?| (QU:)F
import org.rut.util.algorithm.support.QuickSort; ?:StFlie
import org.rut.util.algorithm.support.SelectionSort; +_^Rxx!XA
import org.rut.util.algorithm.support.ShellSort; 0e./yPTT
'XW[uK]w)
/** >?Y)evW
* @author treeroot 05sWN0
* @since 2006-2-2 Z_b^K^4
* @version 1.0 1XfH,6\8i
*/ {u!Q=D$3
public class SortUtil { L'i0|_
public final static int INSERT = 1; *"cK_MH/o
public final static int BUBBLE = 2; Q6>7{\8l
public final static int SELECTION = 3; #Z;6f{yWf
public final static int SHELL = 4; nsT]Yxo%M
public final static int QUICK = 5; 6yDj1PI
public final static int IMPROVED_QUICK = 6; hz:^3F`>/&
public final static int MERGE = 7; $'Pn(eZHGv
public final static int IMPROVED_MERGE = 8; q%H`/~AYM
public final static int HEAP = 9; kg,t[Jl
>L5fc".
public static void sort(int[] data) { z+@CzHCN
sort(data, IMPROVED_QUICK); b5!\"v4c
} NO$n-<ag
private static String[] name={ |E{tS,{OhJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]JGh[B1gh
}; FEOr'H<3x
L >* F8|g
private static Sort[] impl=new Sort[]{ +SM&_b
new InsertSort(), (tZ#EL0
new BubbleSort(), hbZ]DRg
new SelectionSort(), '*4>&V.yX
new ShellSort(), v?AQ&'Fk
new QuickSort(), CMQlxX?
new ImprovedQuickSort(), !WTZ=|
new MergeSort(), x"N{5
new ImprovedMergeSort(), g>k"R4
new HeapSort() 'eM90I%(
}; t1LIZ5JY
=1!,A
public static String toString(int algorithm){ \VL_
return name[algorithm-1]; xXa* d
} S7|6dwQ&
xg:r5Z/|)
public static void sort(int[] data, int algorithm) { 25bbuhss
impl[algorithm-1].sort(data); ujX;wGje
} /D3{EjUE=
!{t|z=Qg
public static interface Sort { `Zm6e!dH-
public void sort(int[] data); r@{TN6U
} !ka* rd
!B}9gT
public static void swap(int[] data, int i, int j) { wgS,U}/i
int temp = data; F#sm^%_2
data = data[j]; w>&*-}XX
data[j] = temp; w31Ox1>s
} QkdcW>:a7
} 4\Y5RfLB_