[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; n802!d+Tn
} }JvyjE
int i1=l; /z~;.jRg
int i2=mid+1; <BT}Tv9
for(int cur=l;cur<=r;cur++){ #O`nQ
if(i1==mid+1) b+3{ bE
data[cur]=temp[i2++]; P>jlFm
else if(i2>r) "TG}aS
data[cur]=temp[i1++]; ar>S_VW*
else if(temp[i1] data[cur]=temp[i1++]; kM@8RAxA
else 8'/vW~f
data[cur]=temp[i2++]; K]Ed-Tz8QZ
} * 496"kU
} $40tAes9
9<,\+}^{
} ;-U:t4
c1!h;(&
改进后的归并排序: FRX'"gIR0
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package org.rut.util.algorithm.support; )*$'e<?`
u9sffX5x[J
import org.rut.util.algorithm.SortUtil; xUzfBn
-*+7-9A I
/** mWCY%o@
* @author treeroot /ey}#SHm,
* @since 2006-2-2 8 w^i
* @version 1.0 dN;C-XF3s
*/ 62a{Ggs{
public class ImprovedMergeSort implements SortUtil.Sort { JtvAi\52$
dsrzXmE0
private static final int THRESHOLD = 10; wVV'9pw}
If2f7{b
/* mI9~\k&9
* (non-Javadoc) M>8#is(pV
* oM Q+=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *|ubH?71%Y
*/ ;S2^f;q~$
public void sort(int[] data) { B0nkHm.Sj
int[] temp=new int[data.length]; 8T7[/"hi\
mergeSort(data,temp,0,data.length-1); dk-Y!RfNx
} aJK8G,Vk
-=QA{n
private void mergeSort(int[] data, int[] temp, int l, int r) { ;NBJ@E,
int i, j, k; ^Jsx^?
int mid = (l + r) / 2; jt=mK,%
if (l == r) q>o1kTI
return; 1i^!A&
if ((mid - l) >= THRESHOLD) R\ <HR9r
mergeSort(data, temp, l, mid); ~ex1,J*}t
else E0Ig/ j
insertSort(data, l, mid - l + 1); {3@/@jO?
if ((r - mid) > THRESHOLD) Gpo(Zf?
mergeSort(data, temp, mid + 1, r); ST] h NM
else &mp=jGR
insertSort(data, mid + 1, r - mid); ebp18_a|
ixp(^>ZN
for (i = l; i <= mid; i++) { YN.rj-;^+
temp = data; )lBke*j~
} .Hc]?R]
for (j = 1; j <= r - mid; j++) { DXsp 2
temp[r - j + 1] = data[j + mid]; 349W0>eOT
} #1&wfI$
int a = temp[l]; 2LEf"FH0~
int b = temp[r]; MG<F.u
for (i = l, j = r, k = l; k <= r; k++) { /87?U; |V
if (a < b) { 7[.aAGTZ;
data[k] = temp[i++]; ,J!G-?:@n
a = temp; 5@F1E8T
} else { z~UqA1r
data[k] = temp[j--]; &X }GJLC3
b = temp[j]; Mx4 <F "9
} 4&&((H
} 6"/cz~h
} n2Q~fx<6%
:l'61$=
/** 4D0=3Vy
* @param data D/5 ah_;
* @param l .|G([O^H
* @param i B_aLqB]U
*/ dpxP
private void insertSort(int[] data, int start, int len) { !Z3iu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DwMq
} {D={>0
} JS1$l+1
} U\*}}
} rB}Iwp8
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堆排序： LK-2e$1
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package org.rut.util.algorithm.support; <]2X~+v
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import org.rut.util.algorithm.SortUtil; lc?9B
A9`& Wnw?
/** 2"cUBFc1I
* @author treeroot @!1o +x
* @since 2006-2-2 om@GH0o+
* @version 1.0 Z@4BTA
*/ 'avzESe~'
public class HeapSort implements SortUtil.Sort{ ...|S]a
|:7O
/* (non-Javadoc) :70[zo7n'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nYhI0q
*/ W|XW2`3p
public void sort(int[] data) { 7O',X Y
MaxHeap h=new MaxHeap(); 8E`A`z
h.init(data); UFr ]$m&
for(int i=0;i h.remove(); qRlS^=#
System.arraycopy(h.queue,1,data,0,data.length); 0<d9al|J
} e%Rg,dX
OuWG.Za
private static class MaxHeap{ __dSEOGoe
?Imq4I~)
void init(int[] data){ v0+mh]
this.queue=new int[data.length+1]; ,l+lokD-#
for(int i=0;i queue[++size]=data; ve|ig]$5g<
fixUp(size); `!V=~"ve
} J$Uj@M
} { }Q!./5
(v+nn1,
private int size=0; tbG^9d
k]K][[s`
private int[] queue; %Bn"/0,
kG 7]<^Os3
public int get() { Osz:23(p
return queue[1]; $o2H#"
} 6b`3AAGU"
X` r~cc
public void remove() { |>X5@
SortUtil.swap(queue,1,size--); fhp\of/@ R
fixDown(1); 1-JdQs6
} ^Y[.-MJt+
file://fixdown hA 1_zKZ
private void fixDown(int k) { !6.}{6b
int j; m3[R
while ((j = k << 1) <= size) { ;7=pNK
if (j < size %26amp;%26amp; queue[j] j++; Y<0}z>^
if (queue[k]>queue[j]) file://不用交换 onqfmQ,3E
break; as%@dUK?
SortUtil.swap(queue,j,k); }^3CG9%
k = j; X0G6Wp
} r Z)?uqa
} \zOo[/-<
private void fixUp(int k) { ~gZ"8frl
while (k > 1) { ($s%5|
int j = k >> 1; noI>Fw<V
if (queue[j]>queue[k]) drRi<7 i
break; g}\G@7Q
SortUtil.swap(queue,j,k); %? 87#|
k = j; 1j4tR#L
} f0Wbc\L[
} SlK6KnX
m^?a/
} *DBm"{q%&k
at<N?r
} [{@0/5i
)c432).Z
SortUtil： 9W5~I9%
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package org.rut.util.algorithm; L F<{/c9,
vT1StOx<V
import org.rut.util.algorithm.support.BubbleSort; iG+hj:5
import org.rut.util.algorithm.support.HeapSort; +hiskV@v
import org.rut.util.algorithm.support.ImprovedMergeSort; g_8A1lt
import org.rut.util.algorithm.support.ImprovedQuickSort; qK=uSLo\+
import org.rut.util.algorithm.support.InsertSort; 5ub|r0&M
import org.rut.util.algorithm.support.MergeSort; V7~tIhuJH
import org.rut.util.algorithm.support.QuickSort; =o_Ua^mr
import org.rut.util.algorithm.support.SelectionSort; ;YGCsLT<xt
import org.rut.util.algorithm.support.ShellSort; ^qR2!fwm<
;-]' OiS;
/** )SjhOvm
* @author treeroot -2DvKW$
* @since 2006-2-2 9Su4nt`i
* @version 1.0 cpLlkR O
*/ u([|^~H]
public class SortUtil { tRC*@>I$
public final static int INSERT = 1; Dt]N&E#\D
public final static int BUBBLE = 2; 9Ub##5$[,
public final static int SELECTION = 3; |J:|56kVZq
public final static int SHELL = 4; -6KNMk
public final static int QUICK = 5; M0) q
public final static int IMPROVED_QUICK = 6; PoB-:G6
public final static int MERGE = 7; ,y>Sq +
public final static int IMPROVED_MERGE = 8; Z.QgL=
public final static int HEAP = 9; r3;@
:o"9x,
public static void sort(int[] data) { mZG)#gW[
sort(data, IMPROVED_QUICK); qp##>c31X
} ;URvZ! {/Z
private static String[] name={ #S4lRVt5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" WWBm*?U
}; HP,sNiw
IoAG!cS
private static Sort[] impl=new Sort[]{ #OMFv.
new InsertSort(), F9}jiCom
new BubbleSort(), -|.Izgc
new SelectionSort(), n5qg6(Tl]
new ShellSort(), XK+" x!
new QuickSort(), Vd&&GI(:?^
new ImprovedQuickSort(), Z~S%|{&Br
new MergeSort(), WPu-P
new ImprovedMergeSort(), yw@kh^L
new HeapSort() NNgpDL*
}; * a ?qV
|^09ny|
public static String toString(int algorithm){ s;!_'1pi@
return name[algorithm-1]; OL%KAEnD
} fFe{oR
(,`R>Dk
public static void sort(int[] data, int algorithm) { d8!yV~Ka
impl[algorithm-1].sort(data); $S6%a9m
} gfr+`4H>v
% S vfY{
public static interface Sort { uyqu n@q
public void sort(int[] data); (&osR|/Tq
} zBjtPtiiI8
7{JIHY+
public static void swap(int[] data, int i, int j) { >}7Ml
int temp = data; p[^a4E_v
data = data[j]; t@vVE{`
data[j] = temp; Kg;u.4.-M
} I%<LLkQ
} l^k/Y ]