[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; Om<a<q
} rA1._
int i1=l; >~f]_puT
int i2=mid+1; JT?h1v<H]
for(int cur=l;cur<=r;cur++){ [Pp'Ye~K@c
if(i1==mid+1) J4'eI[73
data[cur]=temp[i2++]; 46x'I(
else if(i2>r) yauvXosX
data[cur]=temp[i1++]; LD?sh"?b
else if(temp[i1] data[cur]=temp[i1++]; @iiT<
else hoP]9&<T
data[cur]=temp[i2++]; / 1RpM]d
} #Y!a6h+
} 5G#n"}T
("@!>|H
} }\f0 A-
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改进后的归并排序: B?QIN]
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package org.rut.util.algorithm.support; b>W%t
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import org.rut.util.algorithm.SortUtil; V#HuIgf-
im8CmQ
/** B~mj 8l4
* @author treeroot :s,Z<^5a)g
* @since 2006-2-2 n<,BmVQ
* @version 1.0 ,uvRi)O>a
*/ zA 3_Lx!
public class ImprovedMergeSort implements SortUtil.Sort { kM6 Qp
NbobliC=
private static final int THRESHOLD = 10; e.>P8C<&
#E[0ys1O
/* W^Yxny
* (non-Javadoc) (Z*!#}z`
* .`lCWeHN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !i50QA|(G
*/ I]575\bA
public void sort(int[] data) { ' QG?nu
int[] temp=new int[data.length]; R-:2HRaA
mergeSort(data,temp,0,data.length-1); txpgO1
} K'bP@y_cq
>z03{=sAN
private void mergeSort(int[] data, int[] temp, int l, int r) { ]]mJ']l
int i, j, k; sK{e*[I>W
int mid = (l + r) / 2; 9x8fhAy}4
if (l == r) Q8NX)R
return; b 6p|q_e
if ((mid - l) >= THRESHOLD) 0[`^\Mv4y
mergeSort(data, temp, l, mid); Y73C5.dNcE
else :h$$J lP
insertSort(data, l, mid - l + 1); _w{Qtj~s|
if ((r - mid) > THRESHOLD) !VJoM,b8
mergeSort(data, temp, mid + 1, r); Wzh`or
else 1x)J[fyId
insertSort(data, mid + 1, r - mid); sx%[=g+<2(
D-c4EV
for (i = l; i <= mid; i++) { #R"*c hLV
temp = data; p?!/+
} rsQtMtS2
for (j = 1; j <= r - mid; j++) { -"`=1l
temp[r - j + 1] = data[j + mid]; 3mgD(,(^
} =&]L00u.
int a = temp[l]; ^c<Ve'-
int b = temp[r]; 2HdC |$_+
for (i = l, j = r, k = l; k <= r; k++) { /(cPfZZ
if (a < b) { !Ee:o"jG{
data[k] = temp[i++]; A<{{iBEI`
a = temp; d~H`CrQE*
} else { ?}0,o.
data[k] = temp[j--]; |N2#ItBbW
b = temp[j]; Za9qjBH
} t!XwW$@
} vt8By@]:
} ]`K2N
vgPCQO([
/** sT)CxOV
* @param data m@c)Xci
* @param l rH-23S
* @param i NOva'qk
*/ %Zi} MPx
private void insertSort(int[] data, int start, int len) { $I=~S[p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nKY6[|!#
} xEI%D|)<
} 0;k# *#w
} 3n _htgcv
} siI;"?
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堆排序： {mg2pfhB!
*pq\MiD/
package org.rut.util.algorithm.support; QV!up^Zso
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import org.rut.util.algorithm.SortUtil; >A= f1DF
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/** wT@og|M
* @author treeroot b9krOe*j
* @since 2006-2-2 S'" Df5
* @version 1.0 6Oq7#3]
*/ UNYqft4
public class HeapSort implements SortUtil.Sort{ CTb%(<r
(zk"~Ud
/* (non-Javadoc) oU8q o-J1H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s AkdMo
*/ r@V!,k#S
public void sort(int[] data) { rp$'L7lrX
MaxHeap h=new MaxHeap(); kmW4:EA%
h.init(data); Y4-t7UlS;
for(int i=0;i h.remove(); V88p;K$+
System.arraycopy(h.queue,1,data,0,data.length); vaLSH xi
} *w&e\i|7
;uJMG
private static class MaxHeap{ 7! Nsm
Hs8>anVo[
void init(int[] data){ &yg|t5o
this.queue=new int[data.length+1]; V!Uc(
for(int i=0;i queue[++size]=data; TOt dUO
fixUp(size); K1KreYlF
} ]kSGR
} L0,'mS
2G7Wi!J
private int size=0; COlqcq'qAu
>Tgv11[
private int[] queue; ll^#JpT[S
<I?Zk80
public int get() { -RwE%cr
return queue[1]; 1zv'.uu.,
} :;}P*T*PU
?}oFg#m-<L
public void remove() { `?]k{ l1R
SortUtil.swap(queue,1,size--); la!~\wpa
fixDown(1); dPlV>IM$z
} T)/eeZ$
file://fixdown FPz9N@M%Q
private void fixDown(int k) { o/E >f_k[
int j; Ui~>SN>s
while ((j = k << 1) <= size) { 1}x%%RD_
if (j < size %26amp;%26amp; queue[j] j++; K?;DMUSY\
if (queue[k]>queue[j]) file://不用交换 afVT~Sf{
break; +(Ae4{z"1+
SortUtil.swap(queue,j,k); /v{I
k = j; )nkY_'BV
} L *wYx|
} y(#e}z:
private void fixUp(int k) { Et$2Y-L.
while (k > 1) { ^8WRqQdx
int j = k >> 1; t.<i:#rj>l
if (queue[j]>queue[k]) 4?kcv59
break; ^#pEPVkY
SortUtil.swap(queue,j,k); teRTu
k = j; /^ts9:
} >MZ/|`[M
} h p1Bi
<'u'#E@"sl
} X'ag)|5ot
#qki
} y29m/i:
IGl9g_18
SortUtil： M`_0C38
@ArSC
package org.rut.util.algorithm; Jy)/%p~
O.? JmE
import org.rut.util.algorithm.support.BubbleSort; Gc?a+T
import org.rut.util.algorithm.support.HeapSort; {}9a6.V;}
import org.rut.util.algorithm.support.ImprovedMergeSort; 3";q[&F9y
import org.rut.util.algorithm.support.ImprovedQuickSort; MgZ/(X E
import org.rut.util.algorithm.support.InsertSort; 4#D,?eA7
import org.rut.util.algorithm.support.MergeSort; dtDFoETz
import org.rut.util.algorithm.support.QuickSort; /ZX}Nc g
import org.rut.util.algorithm.support.SelectionSort; &>O+}>lr9
import org.rut.util.algorithm.support.ShellSort; \bXa&Lq
=;L|gtH"
/** 4W75T2q#
* @author treeroot 2?C)&
* @since 2006-2-2 97Vtn4N3
* @version 1.0 )%TmAaj9d
*/ F,kZU$
public class SortUtil { F59 TZI
public final static int INSERT = 1; W9&=xs6
public final static int BUBBLE = 2; }e1ZbmW
public final static int SELECTION = 3; ".%k6W<n
public final static int SHELL = 4; k$VlfQ'+
public final static int QUICK = 5; ]Ljf?tk
public final static int IMPROVED_QUICK = 6; 4g/dP^
public final static int MERGE = 7; F4QVAOM]U
public final static int IMPROVED_MERGE = 8; :jf3HG
public final static int HEAP = 9; " bG2:
u8^lB7!e/
public static void sort(int[] data) { G@0&8
sort(data, IMPROVED_QUICK); V`5O{Gg
} +@UV?"d
private static String[] name={ t20K!}D_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TeQV?ZQ#}
}; 7zMr:JmV
%T[]zJ(
private static Sort[] impl=new Sort[]{ BtZyn7a
new InsertSort(), l (o~-i\M
new BubbleSort(), _1^'(5f$
new SelectionSort(), y_,bu^+*
new ShellSort(), YSMAd-Ef-
new QuickSort(), z:O8Ls^\T
new ImprovedQuickSort(), )7@0[>
new MergeSort(), )oZ dj`
new ImprovedMergeSort(), lZ0 =;I
new HeapSort() *pd@.|^)m
}; 3`HV(5U[
gw(z1L5 n
public static String toString(int algorithm){ ]9-\~Mwh
return name[algorithm-1]; xno\s.H%]
} =1! 'QUc
A&{Nh` q
public static void sort(int[] data, int algorithm) { reVgqYp{{-
impl[algorithm-1].sort(data); PF2nLb2-
} G$PE}%X
k)u[0}
public static interface Sort { =Qq+4F)MD
public void sort(int[] data); IV-{ve6
} 6@f-Glwg
Vl]>u+YqE
public static void swap(int[] data, int i, int j) { :&Nbw
int temp = data; p_ =z#
data = data[j]; AW .F3hN)
data[j] = temp; 0:+E-^X
} DIvHvFss
} i4Jc.8^9$