[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; ?~y(--.t;T
} Cot\i\]jv
int i1=l; g1!L. On
int i2=mid+1; 9p'J(`
for(int cur=l;cur<=r;cur++){ ny?m&;^r:
if(i1==mid+1) IF?B`TmZ
data[cur]=temp[i2++]; r#Oz0=0u
else if(i2>r) DO,&Foh\
data[cur]=temp[i1++]; S/:QVs
else if(temp[i1] data[cur]=temp[i1++]; e ~,'|~ C5
else eJ\j{-
data[cur]=temp[i2++]; `j"G=%e3.
} Y,Zv0-"
} EYD{8Fw-
fvfVBk#
} o 0 #]EMr
U$JIF/MO_
改进后的归并排序: WsDe0F
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package org.rut.util.algorithm.support; ]SR`96vG
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import org.rut.util.algorithm.SortUtil; h}<ZZ
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/** t4c#' y
* @author treeroot imq(3?
* @since 2006-2-2 =]mx"0i[
* @version 1.0 =sVt8FWGY
*/ Ck a]F2,
public class ImprovedMergeSort implements SortUtil.Sort { c89vx 9
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private static final int THRESHOLD = 10; [cAg'R6
k_^/
/* _5`S)G{
* (non-Javadoc) %~(i[Ur;
* /<(ik&%N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O,Gn2Do
*/ v23Uh2[@Yy
public void sort(int[] data) { 0!\q
int[] temp=new int[data.length]; 7Cp_41._
mergeSort(data,temp,0,data.length-1); FAl6
} u9~J1s<e
__%E!*m"<_
private void mergeSort(int[] data, int[] temp, int l, int r) { \k-juF80
int i, j, k; iC2nHZ*,
int mid = (l + r) / 2; z(68^-V=:
if (l == r) Ui;s.f
return; 5&Kn #
if ((mid - l) >= THRESHOLD) ho$%7mc
mergeSort(data, temp, l, mid); GQBN-Qv
else jz:c)C&/
insertSort(data, l, mid - l + 1); ,T[ +omo
if ((r - mid) > THRESHOLD) 8J U~Q
mergeSort(data, temp, mid + 1, r); ?t P/VL
else ''07Km@x
insertSort(data, mid + 1, r - mid); -{SiK
B;je|M!d
for (i = l; i <= mid; i++) { X_@@v|UF
temp = data; ?Gw89r
} <&Xq`i/(
for (j = 1; j <= r - mid; j++) { R*C+Yk)Tkt
temp[r - j + 1] = data[j + mid]; Dx)XC?'xO
} 'Rw] C[
int a = temp[l]; m6<0 hP
int b = temp[r]; -s "$I:v
for (i = l, j = r, k = l; k <= r; k++) { xmx;tq
if (a < b) { VjMuU"++@
data[k] = temp[i++]; 4ux5G`oL
a = temp; <t@*[Aw
} else { ID+k`nP
data[k] = temp[j--]; Mwk_SCy
b = temp[j]; +Z]%@"S?
} CxQ,yd;>
} Khd,|pM
} Bz~h-
s\R?@
/** t+q`h3
* @param data E1g$WhXIS
* @param l 1\{F.v
* @param i X0TGJ,yW(
*/ gi >{`.]
private void insertSort(int[] data, int start, int len) { aC 0Jfo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =upP3rw
} b<7qmg3
} .w)t<7 y
} %;?3A#
} Z`t?kXDNoI
1=.kH[R
堆排序： 0E1)&f
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package org.rut.util.algorithm.support; XLxr~Yo
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import org.rut.util.algorithm.SortUtil; *4y r7~S5
tpK4 gjf
/** #ySx$WT;
* @author treeroot Z+7S,M
* @since 2006-2-2 [.,6~=}vP
* @version 1.0 -y<uAI g
*/ 4gENV{L
public class HeapSort implements SortUtil.Sort{ x0GZ2*vfsb
bf(&N-"A
/* (non-Javadoc) tYa8I/HpT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0MPDD%TP
*/ ;d40:q<
public void sort(int[] data) { zt0 zKXw
MaxHeap h=new MaxHeap(); DboqFh#]=h
h.init(data); $@wkQ%
for(int i=0;i h.remove(); fh<G&E8 p
System.arraycopy(h.queue,1,data,0,data.length); *[n^6)
} a-y5\x
`_i-BdW
private static class MaxHeap{ JY16|ia
`_`,XkpzCJ
void init(int[] data){ ic#drpl,
this.queue=new int[data.length+1]; N/VIP0Kb
for(int i=0;i queue[++size]=data; &pz8vWCk
fixUp(size); ZeZwzH)BD
} =T]OYk
} ")OLmkC
$ 1ZY Vw
private int size=0; $n"Llw&)
L+L9)8FJ
private int[] queue; 06$9Uz9
P0=F9`3wb
public int get() { 9n7d "XD2
return queue[1]; 0<9TyN6
} B"v=Fr[
[4e5(!e
public void remove() { 8 Hn{CJ~'
SortUtil.swap(queue,1,size--); Q<pM tW
fixDown(1); H"l'E9k.&p
} a{W-+t
file://fixdown qT4s*kqr
private void fixDown(int k) { 4{KsCd)
int j; p%-9T>og
while ((j = k << 1) <= size) { ?da3Azp
if (j < size %26amp;%26amp; queue[j] j++; L')zuI
if (queue[k]>queue[j]) file://不用交换 <9~qAq7^
break; aJ5R0Y,
SortUtil.swap(queue,j,k); %ZK}y{u\
k = j; =qRVKz
} P'8E8_M}
} Xk$lQMwZ
private void fixUp(int k) { .w~USJ=X
while (k > 1) { )EoG@:[
int j = k >> 1; BR'|hG
if (queue[j]>queue[k]) ~7 TzUb
break; u+_#qk0NfK
SortUtil.swap(queue,j,k); *$!LRmp?
k = j; '\Ub*m((1O
} Qp,l>k
} TfPx
MR}\fw$(.
} |=POV]K
;l'I.j
} o[6hUX0tN
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SortUtil： d9(FwmE
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package org.rut.util.algorithm; ?*4zNhL
w3@te\
import org.rut.util.algorithm.support.BubbleSort; x-<dJ}`
import org.rut.util.algorithm.support.HeapSort; qJ@?[|2R
import org.rut.util.algorithm.support.ImprovedMergeSort; $H^6I8>
import org.rut.util.algorithm.support.ImprovedQuickSort; sq_:U_tJ
import org.rut.util.algorithm.support.InsertSort; pP @#|T
import org.rut.util.algorithm.support.MergeSort; d\v _!7
import org.rut.util.algorithm.support.QuickSort; r!S iR(
import org.rut.util.algorithm.support.SelectionSort; o2~x'*A0I
import org.rut.util.algorithm.support.ShellSort; Gm.hBNgp
(`xc3-,
/** 7}Sw(g)o7
* @author treeroot Q$%@.@
* @since 2006-2-2 c.fj[U|j
* @version 1.0 "{k3~epYaN
*/ 9M<? *8)
public class SortUtil { VsC]z, oV
public final static int INSERT = 1; <Yc:,CU
public final static int BUBBLE = 2; zP9!fA
public final static int SELECTION = 3; X$* 'D)
public final static int SHELL = 4; -AX3Rnv^!
public final static int QUICK = 5; nTAsy0p]
public final static int IMPROVED_QUICK = 6; 2Y+*vNs3
public final static int MERGE = 7; 'Khq!pC
public final static int IMPROVED_MERGE = 8; 9\8""-
public final static int HEAP = 9; { at; U@o
/y0 )r.R
public static void sort(int[] data) { fp7Qb $-A
sort(data, IMPROVED_QUICK); [>-k(D5D
} $spf=t"nh
private static String[] name={ XP7A.I#q0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yS*PS='P
}; ",}VB8K
)nY/ RO
private static Sort[] impl=new Sort[]{ /dfZ>k8
new InsertSort(), }DSz_^
new BubbleSort(), EVf'1^f
new SelectionSort(), ciTQH (G
new ShellSort(), sqw _c{9
new QuickSort(), lwU&jo*@
new ImprovedQuickSort(), =N=,;<6%A
new MergeSort(), G<-.{Gx)
new ImprovedMergeSort(), Z8T{Xw6%
new HeapSort() 0pR04"`;
}; gvC2\k{
-4Xr5j%o
public static String toString(int algorithm){ lcr=^
return name[algorithm-1]; )oj`K,#
} Cn,jLy
=8iM,Vl3
public static void sort(int[] data, int algorithm) { !rWib`%
impl[algorithm-1].sort(data); /Hx\ gtV
} U2aE:$oeYi
BXdT;b"J(
public static interface Sort { %VMazlM15
public void sort(int[] data); C?O{l%0
} E8xXr>j>#
U0rz 4fxc
public static void swap(int[] data, int i, int j) { &^<94l
int temp = data; I$Z"o9"
data = data[j]; >eC^]#c
data[j] = temp; bfJDF(=h
} ZD,l2DQ?
} 8[DD=[&