[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; bQd'objpY
} e>z
int i1=l; :Z)a&A9v
int i2=mid+1; 5hN)y-4@
for(int cur=l;cur<=r;cur++){ MiHa'90{K
if(i1==mid+1) C#<b7iMg
data[cur]=temp[i2++]; <% #Dwo}
else if(i2>r) $>^DkrOd
data[cur]=temp[i1++]; Sd[%$)scC
else if(temp[i1] data[cur]=temp[i1++]; V$wW?+V
else oA/[>\y
data[cur]=temp[i2++]; 2tPW1"M.n
} i/UDda"E
} 9O(vh(C
yC#%fgQ r
} -DAkVFsN
s'$5]9$S
改进后的归并排序: GZ=7)eJ~<
j'L/eps?S
package org.rut.util.algorithm.support; }-`N^
>}~\*Y\8@
import org.rut.util.algorithm.SortUtil; ]'IZbx:
HrOq>CSR
/** 9t$#!2z
* @author treeroot 2fqg,_
* @since 2006-2-2 AS1#_fC
* @version 1.0 6ijL+5
*/ uX/K/4
public class ImprovedMergeSort implements SortUtil.Sort { _\"2Mdk`]
h2S!<
private static final int THRESHOLD = 10; ,gO}H)v]t
F#b^l}
/* 5r2A^<)
* (non-Javadoc) gm^j8B
* s+m3&(X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lL\%eQ
*/ pseN!7+or
public void sort(int[] data) { R!)3{cjU@
int[] temp=new int[data.length]; jmORKX+)
mergeSort(data,temp,0,data.length-1); !l6Ez_'
} '@0Z#A
1 b&<De
private void mergeSort(int[] data, int[] temp, int l, int r) { ^5'pJ/BV
int i, j, k; Wg5<@=x!G
int mid = (l + r) / 2; $.+_f,tU
if (l == r) 4 EE7gkM5
return; z@<OR$/`L
if ((mid - l) >= THRESHOLD) aRV.;S
mergeSort(data, temp, l, mid); zi^?9n),
else IgIM8"N
insertSort(data, l, mid - l + 1); G'U! #
if ((r - mid) > THRESHOLD) $,.XPK5Qu
mergeSort(data, temp, mid + 1, r); FG:t2ea
else 8P?p
insertSort(data, mid + 1, r - mid); ;!hwcOkX
Hk8lHja+\
for (i = l; i <= mid; i++) { ^j!2I&h1
temp = data; ]5O]=^ u0
} 56?RFnZ&j
for (j = 1; j <= r - mid; j++) { gbrn'NT
temp[r - j + 1] = data[j + mid]; 5i@WBa
} !AXt6z cZ
int a = temp[l]; C+L_f_6]
int b = temp[r]; `nCVO;B
for (i = l, j = r, k = l; k <= r; k++) { `Sx1?@8(
if (a < b) { oh0*bh
data[k] = temp[i++]; I}sb0 Q&
a = temp; [xdi.6%
} else { \ z3>kvk
data[k] = temp[j--]; 4%$#
b = temp[j]; 60R]Q
} JKz]fgOd$
} |s'5~+
} qKD Nw8>
:V0sKg|sS
/** z*)kK
* @param data yBRYEqS+
* @param l +QEP:#qZw
* @param i !%'"l{R
*/ e-Zul.m
private void insertSort(int[] data, int start, int len) { 7Ucq(,\./
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?[=OQ/E
} gW-mXb
} !C@+CZXLx
} ]1 jhy2j
} |va^lT
q#O8Fv
堆排序： fZp3g%u
UP7?9\
package org.rut.util.algorithm.support; (]` rri*^
d2?#&d'aq
import org.rut.util.algorithm.SortUtil; NRT@"3,1YP
>qVSepK3
/** }tO>&$ Z6f
* @author treeroot CiV^bYi
* @since 2006-2-2 ^fQa whub
* @version 1.0 W9QVfe#s
*/ p^1~o/
public class HeapSort implements SortUtil.Sort{ $)eS Gslz
z%1& t4$
/* (non-Javadoc) [$c"}=g[+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #;=sJ[m4
*/ ]=p^32
public void sort(int[] data) { <.2jQ#So
MaxHeap h=new MaxHeap(); q+} \(|
h.init(data); DkSs^ym
for(int i=0;i h.remove(); A&A{Thz
System.arraycopy(h.queue,1,data,0,data.length); k=cDPu -
} $AizKiV
(*_lLM@Cd
private static class MaxHeap{ 8Wo!NG:V5
fRT4>So
void init(int[] data){ 1xr2x;
this.queue=new int[data.length+1]; Q/q>mN"#1
for(int i=0;i queue[++size]=data; 6Jq3l_
fixUp(size); hV+=hX<h
} ?E<9H/
} gLRDd~H
"lrQC`?
private int size=0; gWL`J=DiU
8 C9ny}
private int[] queue; fwiP3*j+Nn
lwz\"8
public int get() { [$F*R@,&
return queue[1]; @t;726
} &F:.OVzX
CYlS8j
public void remove() { tLxeq?Oo]
SortUtil.swap(queue,1,size--); Uu52uR
fixDown(1); 80`$F{xcX
} `H 'wz7
file://fixdown B*Ey&DAV
private void fixDown(int k) { 0yvp>{;p
int j; k]^ya?O]p
while ((j = k << 1) <= size) { 0OQ*V~>f
if (j < size %26amp;%26amp; queue[j] j++; N:okt)q:%
if (queue[k]>queue[j]) file://不用交换 4UUbX
break; 7>f"4r_r6<
SortUtil.swap(queue,j,k); A2;6Vz=z
k = j; HOF=qE*p
} 3m9b
} ^ g|VZN
private void fixUp(int k) { 1;DRcVyS+
while (k > 1) { FE]UqB
int j = k >> 1; 2gZ nrU
if (queue[j]>queue[k]) N'-[>w7vK2
break; GKjtX?~1
SortUtil.swap(queue,j,k); RKE"}|i+S
k = j; 0:>hK\F#
} ,Si{]y
} 5&h">_j
GmaNi
} dgIH`<U$
F>3 o0ke}
} U4^c{KWS
f$6N
SortUtil： la)^`STh
EFljUT?&
package org.rut.util.algorithm; \@WVeFr
Lt=32SvTn
import org.rut.util.algorithm.support.BubbleSort; L<0_e^8
import org.rut.util.algorithm.support.HeapSort; *U]&a^N
import org.rut.util.algorithm.support.ImprovedMergeSort; eBs.RR ]O
import org.rut.util.algorithm.support.ImprovedQuickSort; pjX=:K|
import org.rut.util.algorithm.support.InsertSort; (tOhuSW
import org.rut.util.algorithm.support.MergeSort; V-@4s}zX
import org.rut.util.algorithm.support.QuickSort; 'j<u0'K@
import org.rut.util.algorithm.support.SelectionSort; )\ceanS
import org.rut.util.algorithm.support.ShellSort; k&%i+5X
7U_ob"`JV
/** X-_VuM_p
* @author treeroot Z\EA!Cs3
* @since 2006-2-2 BZHoRd{EH
* @version 1.0 "n`z`{<n
*/ 3 dJ362
public class SortUtil { kj[boxN
public final static int INSERT = 1; 77yYdil^W+
public final static int BUBBLE = 2; }O $]xB
public final static int SELECTION = 3; )!\6 "{
public final static int SHELL = 4; *bf 5A9
public final static int QUICK = 5; $b1>,d'oz
public final static int IMPROVED_QUICK = 6; ){w{#
public final static int MERGE = 7; #gO[di0WhC
public final static int IMPROVED_MERGE = 8; *2->>"kh
public final static int HEAP = 9; )Yy5u'}
[B+F}Q^;
public static void sort(int[] data) { Y;_F,4H
sort(data, IMPROVED_QUICK); BJWlx*U]
} Ht(TYq
private static String[] name={ Q|h$D~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jaodcT0
}; ^AaE$G&:
FEu"b@v
private static Sort[] impl=new Sort[]{ I V#8W
new InsertSort(), .Iqqjk
new BubbleSort(), UTKyPCfj
new SelectionSort(), 4tLdqs
new ShellSort(), ^C~Ryw7
new QuickSort(), %K|f,w=m
new ImprovedQuickSort(), L<@*6QH
new MergeSort(), 0a{hCx|$J
new ImprovedMergeSort(), tt?`,G.(]
new HeapSort() zhs@YMY
}; 2K};-}eW
rP7 QW)NF
public static String toString(int algorithm){ \]f+{d-&
return name[algorithm-1]; `i cs2po
} 0j(U &
wB0vpt5f
public static void sort(int[] data, int algorithm) { z+Fu{<#(
impl[algorithm-1].sort(data); {24>&<p
} z6@8IszU
3pvqF,"~D
public static interface Sort { -`XS2
public void sort(int[] data); dB6,pY(
} ,H+Y1N4W(
["Ts7;q9[
public static void swap(int[] data, int i, int j) { TYGI f4z
int temp = data; /-FV1G,h
data = data[j]; C_Q3^mLx
data[j] = temp; @a@}xgn{
} &Ril[siw
} [%bGs1U