[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; sZP3xh[B
} hZ/
int i1=l; GyXs{*
int i2=mid+1; Tk|;5^#H
for(int cur=l;cur<=r;cur++){ .)pRB7O3
if(i1==mid+1) -D^y)
data[cur]=temp[i2++]; EvardUB)
else if(i2>r) r+.4|u
data[cur]=temp[i1++]; X]^E:'E!
else if(temp[i1] data[cur]=temp[i1++]; >b"z`{tE
else {O,M}0Eg
data[cur]=temp[i2++]; VNEZBy"F
} Ru\Lr=9
} 3[O =2
nm|m1Z+U
} 3Os3=Ix
NCpn^m)Q}
改进后的归并排序: 4a50w:Jy]
Mh/>qyS*2
package org.rut.util.algorithm.support; "Ohpb!J9
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import org.rut.util.algorithm.SortUtil; ~ z&A
E#F9<=mA)
/** H5MAN,`
* @author treeroot #yRA.;
* @since 2006-2-2 ?)QBJ9F
* @version 1.0 W[Ew6)1T
*/ yt#;3
public class ImprovedMergeSort implements SortUtil.Sort { sTstc+w
V+<AG*[
private static final int THRESHOLD = 10; nXaX=
(<~R[sT|
/* }Z$G=;3#
* (non-Javadoc) v2X0Px_
* F3|pS:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vwg|?sG_
*/ `}Zbfe~
public void sort(int[] data) { 1,!\7@<CT
int[] temp=new int[data.length]; 6f9<&dCK
mergeSort(data,temp,0,data.length-1); Y52xrIvl\
} @X><lz
4bjp*1*]
private void mergeSort(int[] data, int[] temp, int l, int r) { [?6D1b[
int i, j, k; yzzre>F
int mid = (l + r) / 2; +dpj?
if (l == r) ^dKaa
return; g<tTZD\g
if ((mid - l) >= THRESHOLD) |}.B!vg(4
mergeSort(data, temp, l, mid); *H<g9<Dn
else QgM_SY|Rj
insertSort(data, l, mid - l + 1); ~g6[ [
if ((r - mid) > THRESHOLD) c'TLD!^hB
mergeSort(data, temp, mid + 1, r); U$J_:~
else Im1qWe
insertSort(data, mid + 1, r - mid); L*oLKigT
I{ZPv"9j^
for (i = l; i <= mid; i++) { Zd/~ *ZA
temp = data; &Zy=vk*
} l0 :xQV`
for (j = 1; j <= r - mid; j++) { 2jBE+k"M
temp[r - j + 1] = data[j + mid]; q x }fn/:
} 0c6AQP"=V
int a = temp[l]; -t#a*?"$w
int b = temp[r]; 4J|t}
for (i = l, j = r, k = l; k <= r; k++) { \I{A33i2w
if (a < b) { rX d2[pp
data[k] = temp[i++]; Y]0y -H
a = temp; ^G<M+RF2J
} else { m:<3d]L
data[k] = temp[j--]; =zGz|YI*?
b = temp[j]; Rk0rHC6[
} Y[]t_o)
} T0)y5
} ? NK}q\$
fT~<C {
/** )F2tV ]k\
* @param data `3s-\>
* @param l l:/V%{sx
* @param i )%c)-c
*/ =qQQ^`^F'~
private void insertSort(int[] data, int start, int len) { KA2B3\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )yAPYC
} zXPj7K*
} w'>v@`y
} 5E(P,!-.
} WX"M_=lc-@
nQVBHL>
堆排序： &y+*3,!n8
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package org.rut.util.algorithm.support; . M$D
a{.n(M
import org.rut.util.algorithm.SortUtil; pD/S\E0@t
H<?yG->
/** 55KL^+-~
* @author treeroot haK5Oe/cE
* @since 2006-2-2 IsL/p3|
* @version 1.0 :|Ty 0>k
*/ \./2Qc,
public class HeapSort implements SortUtil.Sort{ E#]%e^
X;RI7{fW%X
/* (non-Javadoc) m<ruFxY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :HQ/vVw'"9
*/ |{"7/~*[
public void sort(int[] data) { !A0bbJ
MaxHeap h=new MaxHeap(); rnaDo\5
h.init(data); !g:UM R
for(int i=0;i h.remove(); 7!)%%K.z6
System.arraycopy(h.queue,1,data,0,data.length); :M`BVZ1t
} "VCr^'
Ry~LhU:
private static class MaxHeap{ 7QFEQ}
,FO|'l
void init(int[] data){ "G(/MT^C
this.queue=new int[data.length+1]; =LzW#s=O
for(int i=0;i queue[++size]=data; 06;{2&ju<
fixUp(size); 31Du@h8YX
} ajr8tp'
} I{bi3y0
\Y p oJ!-
private int size=0; r"{1H
5E=Odep`
private int[] queue; mg]dKp
Ca|;8ggf
public int get() { "TI? qoz
return queue[1]; 2uEu,YC
} \)WjkhG<w#
v$Z1Lh
public void remove() { cxdM!L; `
SortUtil.swap(queue,1,size--); (5 hu W7v
fixDown(1); XPKcF I=
} ( PlNaasV
file://fixdown `6su_8Hno
private void fixDown(int k) { sJ=B:3jS0
int j; {D< ?.'
while ((j = k << 1) <= size) { wl9icrR>
if (j < size %26amp;%26amp; queue[j] j++; M$9h)3(B
if (queue[k]>queue[j]) file://不用交换 y0]O 6.{
break; sqRuqUj+
SortUtil.swap(queue,j,k); G=e[TR)i
k = j; :8 :>CHa
} Nx'j+>bz>y
} /.bwwj_;
private void fixUp(int k) { L4%LE/t|e
while (k > 1) { Tr)[q>
int j = k >> 1; RqR X
if (queue[j]>queue[k]) {wySH[V
break; cyyFIJj]
SortUtil.swap(queue,j,k); [E1I?hfJ
k = j; g^FH[(P[G
} 2t<CAKBB
} )1le-SC
l"CONzm!
} |Sm/Uq(c
8qveKS]vZ
} zT8K})#
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SortUtil： S0cO00_ob
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package org.rut.util.algorithm; `^ok5w"oi
aL}_j#m{
import org.rut.util.algorithm.support.BubbleSort; v3Kqs:"\
import org.rut.util.algorithm.support.HeapSort; AsOI`@FV
import org.rut.util.algorithm.support.ImprovedMergeSort; ~7g6o^A>
import org.rut.util.algorithm.support.ImprovedQuickSort; SrIynO
import org.rut.util.algorithm.support.InsertSort; F44")fY
import org.rut.util.algorithm.support.MergeSort; #q%/~-Uk
import org.rut.util.algorithm.support.QuickSort; Q>$v~v?9
import org.rut.util.algorithm.support.SelectionSort; b._pG(o1
import org.rut.util.algorithm.support.ShellSort; e6Y0G,K
]h6<o*
/** ?fGY,<c
* @author treeroot c9V'Zd#
* @since 2006-2-2 {1[8,Ho
* @version 1.0 %Ok.XBS)
*/ vHmn)d1pl
public class SortUtil { b.(^CYYQ
public final static int INSERT = 1; dL>ZL1.$
public final static int BUBBLE = 2; \Uiw: ,
public final static int SELECTION = 3; kmwFw>#
public final static int SHELL = 4; ~Q5HM
public final static int QUICK = 5; Wp $\>
public final static int IMPROVED_QUICK = 6; *&s_u)b
public final static int MERGE = 7; qW*)]s)z
public final static int IMPROVED_MERGE = 8; !WNr09`
public final static int HEAP = 9; }tN"C 3)@
Flsf5 Tr0
public static void sort(int[] data) { HXX"B,N
sort(data, IMPROVED_QUICK); TD<.:ul]
} 3 }XS|Y
private static String[] name={ 0:nyOx(;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $|KbjpQ
}; 38F8(QU{
C'Q} Z_
private static Sort[] impl=new Sort[]{ NR" Xn7G
new InsertSort(), >Uz3F7nHi
new BubbleSort(), P:G^@B3^
new SelectionSort(), o/&Q^^Xj^~
new ShellSort(), G"]'`2.m
new QuickSort(), 'a}pWkLB
new ImprovedQuickSort(), U<$|ET'
new MergeSort(), mSs%gL]g
new ImprovedMergeSort(), ^+88z>
new HeapSort() $P$OWp?b
}; B4%W,F:@
\RJ428sxn
public static String toString(int algorithm){ *5^h>Vk/
return name[algorithm-1]; :0/I2:
} ~~&M&Fe
k2~j:&p
public static void sort(int[] data, int algorithm) { -O\`G<s%
impl[algorithm-1].sort(data); c(:GsoO
} d4/ZOj+%
#-{4F?DA]y
public static interface Sort { \7RP6o
public void sort(int[] data); 'Q# KjY
} ].eGsh2
V<b"jCXI
public static void swap(int[] data, int i, int j) { >5\rU[H>
int temp = data; =Z2sQQVS
data = data[j]; tq{ aa
data[j] = temp; rc"yEI-``"
} qSON3Iid
} z' @F@k6