[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; b}!T!IP}
} YI?tmqzt
int i1=l; \.YJs"<3
int i2=mid+1; oAgU rl;R
for(int cur=l;cur<=r;cur++){ 5DL(#9F8b9
if(i1==mid+1) v9"03=h
data[cur]=temp[i2++]; 0t%`jY~%
else if(i2>r) upiYo(sN.
data[cur]=temp[i1++]; 3;F up4!4}
else if(temp[i1] data[cur]=temp[i1++]; C(n_*8{
else cUr5x8<W).
data[cur]=temp[i2++]; _ ($U\FW
} <xUX&J=;
} NIG* }[}P
L[tq@[(IJ
} 2%vG7o,#
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改进后的归并排序: EN5F*s@r
Y%^qt]u.8
package org.rut.util.algorithm.support; \m#{{SGm
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import org.rut.util.algorithm.SortUtil; cH6J:0>W
d "25e"(~F
/** S5[}kfe
* @author treeroot :"gu=u!
* @since 2006-2-2 K_%gda|l+
* @version 1.0 :kvQ3E0
*/ (w`j?c1
public class ImprovedMergeSort implements SortUtil.Sort { [I,s:mn
yM*_"z!L
private static final int THRESHOLD = 10; Rbcu5.6
Jk57| )/
/* T@d4NF#
* (non-Javadoc) bzh:
* )!Zm*(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0zE(:K
*/ Iz8gZ:rd0
public void sort(int[] data) { ]v l?J
int[] temp=new int[data.length]; a1z*Z/!5
mergeSort(data,temp,0,data.length-1); 3x)jab
} ZQAiuea
ijmGk:L(
private void mergeSort(int[] data, int[] temp, int l, int r) { _|7bpt9
int i, j, k; wZt2%+$6m
int mid = (l + r) / 2; \hP.Q;"MtO
if (l == r) 2FQTu*p&B
return; {T3~js
if ((mid - l) >= THRESHOLD) 7GRPPh<4
mergeSort(data, temp, l, mid); a}[rk*QmZ
else M/kBAxNIC|
insertSort(data, l, mid - l + 1); iUlSRfrC$#
if ((r - mid) > THRESHOLD) q^6l`JJ
mergeSort(data, temp, mid + 1, r); 8|tnhA]~
else Esf\Bo"
insertSort(data, mid + 1, r - mid); T=':$(t
gw<udhk
for (i = l; i <= mid; i++) { P>'29$1'
temp = data; lQpl8>
} D&1(qi=x&
for (j = 1; j <= r - mid; j++) { ]xPy-j6C
temp[r - j + 1] = data[j + mid]; !ezy v`
} Ks-$([_F
int a = temp[l]; zGa V^X
int b = temp[r]; ,,;vG6^a
for (i = l, j = r, k = l; k <= r; k++) { {Gw{W&<
if (a < b) { t(UdV
data[k] = temp[i++]; 04:QEC"9mj
a = temp; uG(XbDZZ1W
} else { EPU3Jban
data[k] = temp[j--]; P?Kg7m W
b = temp[j]; XO}SPf-
} !UHX?<3r
} yeA]j[ #
} 3g5D[>J'
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/** !e}4>!L,(^
* @param data qfF2S
* @param l lqvP Dz
* @param i . dJBv
*/ s?PB ]Tr
private void insertSort(int[] data, int start, int len) { >XW-W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D[`~=y(
} -fOBM 4
} czH# ~
} _z>%h>L|g
} )gV @6w
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堆排序： 7h`t-6<!q
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package org.rut.util.algorithm.support; `o21f{1]X&
nGxG!
import org.rut.util.algorithm.SortUtil; T$Z}1e]
G)&!f)6
/** _po5j;"_O
* @author treeroot rLA^ &P:
* @since 2006-2-2 ;f /2u
* @version 1.0 Pb<6-Jc[
*/ f/U~X;
public class HeapSort implements SortUtil.Sort{ a0's6C
ON"p^o>/_?
/* (non-Javadoc) "8E=*2fcw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x^McUfdr|
*/ 9/{ 8Y&
public void sort(int[] data) { 3*-!0
MaxHeap h=new MaxHeap(); h{^MdYJ
h.init(data); kb!W|l"PN
for(int i=0;i h.remove(); izLB4pk$
System.arraycopy(h.queue,1,data,0,data.length); /!U(/
} I(<Trn
\vE-;,
private static class MaxHeap{ vd/BO
M-(,*6Q
void init(int[] data){ bVr`a*EM
this.queue=new int[data.length+1]; {"O-/* f+(
for(int i=0;i queue[++size]=data; +pe\9F
fixUp(size); E,QD6<?[
} 79B+8= K
} " s/ws
n>,? V3ly
private int size=0; /*Gbl
+NoVe#
private int[] queue; 6iY(RYZ7-
rd,!-w5
public int get() { ]ClqX;'weJ
return queue[1]; y2nT)nL
} ]'Gz~Z%>F
D4*_/,}
public void remove() { rr2^sQ;_
SortUtil.swap(queue,1,size--); [@NW
fixDown(1); Fe2t[y:8h
} ;8cTy8
file://fixdown f]2;s#cu
private void fixDown(int k) { f||S?ns_
int j; ~|ha91
while ((j = k << 1) <= size) { 1w+)ne_&
if (j < size %26amp;%26amp; queue[j] j++; gFXz:!A
if (queue[k]>queue[j]) file://不用交换 31N5dIi,
break; fn8|@)J
SortUtil.swap(queue,j,k); Q)5V3Q]@^
k = j; 'fZ\uMdTx
} hJ?PV@xy
} XE#$|Z
private void fixUp(int k) { ycf)*0k
while (k > 1) { 2B+qS'OT
int j = k >> 1; hLT?aQLx
if (queue[j]>queue[k]) H%{k.#O
break; :bkmm,%O
SortUtil.swap(queue,j,k); -X-sykDm
k = j; J^zB5W,)
} gI/(hp3ob
} {uxTgX
I(j$^DA.
} u.}H)wt
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} (Mw+SM3<
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SortUtil： gO/\Yi
NzS`s,N4/0
package org.rut.util.algorithm; uW4.Q_O!H
0XI6gPo%
import org.rut.util.algorithm.support.BubbleSort; K*M1$@5
import org.rut.util.algorithm.support.HeapSort; UDPn4q
import org.rut.util.algorithm.support.ImprovedMergeSort; /$9We8
import org.rut.util.algorithm.support.ImprovedQuickSort; W*2P+H%
import org.rut.util.algorithm.support.InsertSort; "YVr/u
import org.rut.util.algorithm.support.MergeSort; Y4[oa?G
import org.rut.util.algorithm.support.QuickSort; "i&9RA!1
import org.rut.util.algorithm.support.SelectionSort; f[?JLp
import org.rut.util.algorithm.support.ShellSort; @0%[4
(~fv;}}v
/** ep{/m-h(!_
* @author treeroot xRZ/[1f!
* @since 2006-2-2 t(}g;O-
* @version 1.0 BW ux!
*/ w17CZa 6
public class SortUtil { Nnfq!%
public final static int INSERT = 1; N(P2Lo{JF
public final static int BUBBLE = 2; [MF&x9Ss?%
public final static int SELECTION = 3; >[Tt'.S!?
public final static int SHELL = 4; RL*b47,
public final static int QUICK = 5; wM}AWmH
public final static int IMPROVED_QUICK = 6; Kd*=-
public final static int MERGE = 7; nuw7pEW@?
public final static int IMPROVED_MERGE = 8; z6|kEc"{
public final static int HEAP = 9; z&\N^tBv
Y/ %XkDC~
public static void sort(int[] data) { 7tne/Yz
sort(data, IMPROVED_QUICK); szD9z{9"y
} Az/B/BLB
private static String[] name={ g*!1S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Bve',.xH
}; eV"Uv3
dV /Es
private static Sort[] impl=new Sort[]{ .UvDew/Y
new InsertSort(), ,:0!+1
new BubbleSort(), szXqJG8|
new SelectionSort(), fh`}~ aQ
new ShellSort(), z G`|)
new QuickSort(), V`G^Jyj
new ImprovedQuickSort(), '=J|IN7WT
new MergeSort(), k7]4TIUD*
new ImprovedMergeSort(), 7/iN`3Bz
new HeapSort() Yy,XKIqU
}; # hw;aQ
0 c]]
public static String toString(int algorithm){ 0qm CIcg
return name[algorithm-1]; m%c]+Our`
} qKE+,g'
yh'*eli
public static void sort(int[] data, int algorithm) { -J0I2D
impl[algorithm-1].sort(data); S|?P#.=GX
} 7cO1(yE#vr
{7`1m!R
public static interface Sort { ;D@F
public void sort(int[] data); gUYTVp Vf
} hsJGly5H
)~IOsTjI
public static void swap(int[] data, int i, int j) { \Qq YH^M
int temp = data; >)k[085t
data = data[j]; ""IPaNHQ
data[j] = temp; w=^~M[%w
} )(pgJLW
} L]l?_#*x