[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; sM)1w-
} :!t4.ko
int i1=l; i^:#*Q-co
int i2=mid+1; a8)2I~j
for(int cur=l;cur<=r;cur++){ ]Zh$9YK
if(i1==mid+1) M __S)
data[cur]=temp[i2++]; FsOJmWZ
else if(i2>r) w3 vZ}1|
data[cur]=temp[i1++]; 1l)j(,Zd*
else if(temp[i1] data[cur]=temp[i1++]; 4KxuSI^q
else 7wWx8
data[cur]=temp[i2++]; 5V(#nz
} dKEy6C"@
} w2b(,w
(5Q<xJ
} RgH 6l2
v9@_DlV\
改进后的归并排序: Lbrn8,G\
(FGy"o%TP'
package org.rut.util.algorithm.support; H1?C:R
#'f5owk>,
import org.rut.util.algorithm.SortUtil; ddl]! ^IK
CIo`;jt K
/** $Lfbt=f
* @author treeroot %e25Z.Se$
* @since 2006-2-2 E83$(6z
* @version 1.0 g*FHZM*N9
*/ E|-5=!]fX
public class ImprovedMergeSort implements SortUtil.Sort { nnBS;5
hFycSu
private static final int THRESHOLD = 10; ~~&Bp_9QXN
$D65&R
/* ,ko#z}Z4r,
* (non-Javadoc) X)j%v\#`U
* )O*h79t^Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]b;a~Y0
*/ ;{wzw8!
public void sort(int[] data) { h5l_/vd
int[] temp=new int[data.length]; ZR=i*y
mergeSort(data,temp,0,data.length-1); @mu{*. &
} z"z$.c
tkptm%I_
private void mergeSort(int[] data, int[] temp, int l, int r) { !Y|xu07
int i, j, k; hJ%$Te
int mid = (l + r) / 2; "* FjEA6=
if (l == r) ,H?e23G
return; a 01s'9Be
if ((mid - l) >= THRESHOLD) 89 m.,
mergeSort(data, temp, l, mid); Z3wdk6%:}
else ^FNju/b
insertSort(data, l, mid - l + 1); yRQ1Szbjli
if ((r - mid) > THRESHOLD) qh}+b^Wi
mergeSort(data, temp, mid + 1, r); >\'}&oi
else {%('|(57
insertSort(data, mid + 1, r - mid); 8f~*T
!W&|kvT^
for (i = l; i <= mid; i++) { l_04b];
temp = data; ;mD!8<~z.
} KU/QEeqbrp
for (j = 1; j <= r - mid; j++) { P^Og(F8;
temp[r - j + 1] = data[j + mid]; B/Q>i'e
} u#u/uS"
int a = temp[l]; IAb.Z+ig
int b = temp[r]; c"CR_
for (i = l, j = r, k = l; k <= r; k++) { oMM@{Jp
if (a < b) { suaP'0
data[k] = temp[i++]; uj%]+Llxv
a = temp; KDP&I J
} else { Y*lc ~X
data[k] = temp[j--]; RJ4=AA|
b = temp[j]; A$\/D2S7!
} e :ub]1I=
} 1=>b\"P#E
} k'F*uS
aRn""3[
/** t=:5?}J.Q$
* @param data $Sm iN'7;
* @param l ~k@{b&
* @param i u@Ni *)p`
*/ 1:DA{ejS
private void insertSort(int[] data, int start, int len) { 4Rp[>}L
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }(na)B{m
} })mD{c/
} WT,dTn;W
} -zt*C&)b
} %F-yFN"
$_HyE%F#
堆排序： 3S>rc0]6
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package org.rut.util.algorithm.support; if1)AE-
.hf%L1N%F
import org.rut.util.algorithm.SortUtil; WqCER^~'>
pK>/c>de
/** ~S :8M<aB
* @author treeroot ]5j>O^c<
* @since 2006-2-2 }HbUB$5
* @version 1.0 $_a/!)bP
*/ 8ce'G" b
public class HeapSort implements SortUtil.Sort{ \:JY[s/
"K|':3n|
/* (non-Javadoc) Bbb":c6w0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :$X dR:f}}
*/ 6khm@}}
public void sort(int[] data) { W8]?dL}|
MaxHeap h=new MaxHeap(); Qe9}%k6@E
h.init(data); 7<8'7<X
for(int i=0;i h.remove(); j\BtaC
System.arraycopy(h.queue,1,data,0,data.length); B/~ubw
} Gh3f^PWnc
$b_~
private static class MaxHeap{ U+D#
V+|$H h8
void init(int[] data){ ]P^3uXi
this.queue=new int[data.length+1]; 9CIQRc
for(int i=0;i queue[++size]=data; Vd) %qw
fixUp(size); cqb6]
} |`I9K#w3
} }U%E-:
`B3YP1
private int size=0; o/RGzPR
^#w9!I{4.
private int[] queue; JV2[jo}0N
PI*Z>VE?
public int get() { MpJ3*$Dr
return queue[1]; E%f!SD
} $S/WAw,/
!.q#X^@>L
public void remove() { wv%UsfD
SortUtil.swap(queue,1,size--); ph~#{B(\
fixDown(1); d(Yuz#Qcrh
} M|.ykA<D
file://fixdown %~Ymb&ugg
private void fixDown(int k) { Cq\{\!6[
int j; `RqV\ 6G+
while ((j = k << 1) <= size) { 0V2~
if (j < size %26amp;%26amp; queue[j] j++; p+2%LYR u
if (queue[k]>queue[j]) file://不用交换 z`dnS]q9
break; r6:nYyF$)v
SortUtil.swap(queue,j,k); $z@nT.x5
k = j; m Le 70U
} jlD3SF~2
} r)G)i;;~*
private void fixUp(int k) { m&_!*3BAG
while (k > 1) { ]7|qhAh<L
int j = k >> 1; d5W=?
if (queue[j]>queue[k]) $M4C4_oPy
break; fL&e^Q
SortUtil.swap(queue,j,k); &b19s=Z,
k = j; XlwyD
} 'HWPuWW
} 0+rBGk
@]],H0
} p,)pz_M
Ao *{#z
} 'GZ,
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SortUtil： WD7T&i
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package org.rut.util.algorithm; m?1AgsBR
&e4EZ
import org.rut.util.algorithm.support.BubbleSort; AeW_W0j
import org.rut.util.algorithm.support.HeapSort; Xu{S4#1
import org.rut.util.algorithm.support.ImprovedMergeSort; MG,?,1_ &
import org.rut.util.algorithm.support.ImprovedQuickSort; v)!^%D
import org.rut.util.algorithm.support.InsertSort; lYrW"(2
import org.rut.util.algorithm.support.MergeSort; <+`}: A
import org.rut.util.algorithm.support.QuickSort; |e&hm ~R1
import org.rut.util.algorithm.support.SelectionSort; l_&T)Ei
import org.rut.util.algorithm.support.ShellSort; ?d)eri8,
YQ}IE[J}v
/** c/G^}d%
* @author treeroot 0t00X/
* @since 2006-2-2 )x&>Cf<,
* @version 1.0 SYv5{bff =
*/ tlmfDQD
public class SortUtil { `?(9Bl
public final static int INSERT = 1; $0;Dk,
public final static int BUBBLE = 2; 1FRpcE
public final static int SELECTION = 3; Y}Nd2
public final static int SHELL = 4; ?uE@C3 e
public final static int QUICK = 5; f87lm*wZ
public final static int IMPROVED_QUICK = 6; YYd!/@|N5
public final static int MERGE = 7; Rd+`b
public final static int IMPROVED_MERGE = 8; >!P !F(
public final static int HEAP = 9; "Ze<dB#,Y
7t/C:2^&
public static void sort(int[] data) { onUF@3V
sort(data, IMPROVED_QUICK); ZOHGGO]1M
} `S/;S<';
private static String[] name={ a#P{[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |?uUw$oh
}; X>rv{@KbL
K1fnHpK
private static Sort[] impl=new Sort[]{ -Wl79lE
new InsertSort(), KrD?Z2x
new BubbleSort(), (wEaw|Zx
new SelectionSort(), G~\=:d=^,`
new ShellSort(), (fnp\j3w
new QuickSort(), 0$q)uip
new ImprovedQuickSort(), 2NqO,B|R
new MergeSort(), pGSS
new ImprovedMergeSort(), iED gcg7
new HeapSort() gA DF
}; " [K>faV
Hz3KoO &
public static String toString(int algorithm){ *8xMe
return name[algorithm-1]; B3&`/{u
} Ha20g/UN.
t9m08K:Y
public static void sort(int[] data, int algorithm) { t>(}LV.
impl[algorithm-1].sort(data); NT [~AK9M
} LD)P. f
xw&N[y5
public static interface Sort { {vAv ;m
public void sort(int[] data); 2z027P-Q
} x]jJ
X/`M'8v.%
public static void swap(int[] data, int i, int j) { nfjwWDH
int temp = data; ;_=+h,n
data = data[j]; *z\L
data[j] = temp; HFrwf{J
} JG!@(lr
} ir3EA'_>N