[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; ;z;O}<8s
} hKw4[wB]
int i1=l; \ajy%$;$}
int i2=mid+1; ^Bw2y&nN
for(int cur=l;cur<=r;cur++){ \|Pp%U [
if(i1==mid+1) =6b^j]1
data[cur]=temp[i2++]; etdI:N*x
else if(i2>r) gc-yUH0I
data[cur]=temp[i1++]; "d'D:>z]%
else if(temp[i1] data[cur]=temp[i1++]; WL4{_X
else :ND5po#(
data[cur]=temp[i2++]; 7aVQp3<
} =Mb!&qq
} 1u&}Lq(
*.wX9g9\
} YaJ[39V
q3\ YL?
改进后的归并排序: q/,>UtRr
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package org.rut.util.algorithm.support; y^:!]-+
G2Eke;
import org.rut.util.algorithm.SortUtil; [mKPOg-t
!6:kJL}U
/** E(Tvj\9
* @author treeroot oJJ2y
* @since 2006-2-2 )(`I1"1
* @version 1.0 O,"4HZG
*/ Heatt?(RR
public class ImprovedMergeSort implements SortUtil.Sort { I/D(gY06<
v'(p."g
private static final int THRESHOLD = 10; T!C39T
Y.&nxT95=
/* UN'[sHjOnD
* (non-Javadoc) hnag<=
* xMNUyB{?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rf_(pp)
*/ H'E(gc)>)
public void sort(int[] data) { x5_V5A/@LU
int[] temp=new int[data.length]; .}Va~[0j
mergeSort(data,temp,0,data.length-1); `,|"rn#S
} ssGp:{]v/
Q$!dPwDg
private void mergeSort(int[] data, int[] temp, int l, int r) { SoX\S|}%6[
int i, j, k; EYNi`
int mid = (l + r) / 2; z97RNT|Y7U
if (l == r) UfcQFT{()
return; ^$-ID6
if ((mid - l) >= THRESHOLD) rEEoR'c6
mergeSort(data, temp, l, mid); gE$D#PZa
else rw(EI,G
insertSort(data, l, mid - l + 1); LUSBRr8
if ((r - mid) > THRESHOLD) KITC,@xE_O
mergeSort(data, temp, mid + 1, r); Q!7il<S
else W]b>k lp;
insertSort(data, mid + 1, r - mid); J?VMQTa/+
v4c*6(m
for (i = l; i <= mid; i++) { F uYjrzmx
temp = data; KQGdV{VFs
} aQzDOeTi
for (j = 1; j <= r - mid; j++) { V0 70oZ
temp[r - j + 1] = data[j + mid]; LsB|}_j7
} ]\DZW4?'
int a = temp[l]; f@Oi$9CZn
int b = temp[r]; Msj(>U&}+
for (i = l, j = r, k = l; k <= r; k++) { E6+c{41B
if (a < b) { /G*]3=cSe
data[k] = temp[i++]; 8SH&b8k<<
a = temp; *?Hc8y-dG,
} else { b]A9$-
data[k] = temp[j--]; Lg6;FbY?
b = temp[j]; ->"Z1
} w)xiiO[
} #6okd*^
} T$w`=7
'0ks`a4q
/** )>-94xx|
* @param data !q]@/<=
* @param l rnNB!T
* @param i AN)exU ?
*/ +"P!es\q
private void insertSort(int[] data, int start, int len) { Ht`kmk;I)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ULT,>S6r
} Lp1\vfU<+
} (AIgW
} zDK"Y{
} QVT|6znw
Pi/V3D)B
堆排序： qS|ns'[
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package org.rut.util.algorithm.support; /&>vhpZ}
bf4QW JZD
import org.rut.util.algorithm.SortUtil; p)&Yr
hiT&QJB` _
/** Xzn}gH]
* @author treeroot 1\u{1 V
* @since 2006-2-2 DH IC:6EY
* @version 1.0 V'iT>
*/ h85kQ^%
public class HeapSort implements SortUtil.Sort{ /^M|$JRI
qT153dNA&
/* (non-Javadoc) pB;8yz=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Kry^47"
*/ |#i|BVnoE
public void sort(int[] data) { ;0"p)O@s04
MaxHeap h=new MaxHeap(); Bx" eX>A8
h.init(data); :P/0"
for(int i=0;i h.remove(); DnP "7}v
System.arraycopy(h.queue,1,data,0,data.length); ;${_eab]
} ehTRw8"R
qK-\`m
private static class MaxHeap{ \c(Z?`p]R1
wAA9M4
void init(int[] data){ LW#$%}
this.queue=new int[data.length+1]; <FofRFaS
for(int i=0;i queue[++size]=data; =6O<1<[y
fixUp(size); a<CJ#B2K
} /w/um>>K.
} k [eWhdSw
?#0m[k&`
private int size=0; q]\GBRp
5sZqX.XVF
private int[] queue; BenUyv1d
N@x5h8
public int get() { /cC4K\M
return queue[1]; ozUsp[W>
} c2~oPUj
XCyAt;neon
public void remove() { I7]qTS[vg
SortUtil.swap(queue,1,size--); P ~rTuj
fixDown(1); Q&`if O
} p%#=OtkC
file://fixdown m#|h22^H
private void fixDown(int k) { z/P^Bx]r
int j; Wagb|B\
while ((j = k << 1) <= size) { =2OLyZDI
if (j < size %26amp;%26amp; queue[j] j++; J/>9w
if (queue[k]>queue[j]) file://不用交换 $*qQ/hi
break; ojbms>a
SortUtil.swap(queue,j,k); |y DaFv
k = j; W%P$$x5&
} P;V5f8r?
} Fx3X
private void fixUp(int k) { k`=&m"&#
while (k > 1) { XFi!=|F
int j = k >> 1; PL*1-t?#
if (queue[j]>queue[k]) |0$7{nQ
break; |'!9mvt=
SortUtil.swap(queue,j,k); hOR1RB
k = j; u,`cmyZ
} ftRzgW);
} V7)<MY
il~A(`+YO
} 4YyVh.x
;dquld+q
} TFI$>Oz|
rOTxD/
SortUtil： [;$9s=:[
V]6CHE:BS
package org.rut.util.algorithm; 6g 5Lf)yG
4|/=]w
import org.rut.util.algorithm.support.BubbleSort; k{E!X
import org.rut.util.algorithm.support.HeapSort; c;doxNd6
import org.rut.util.algorithm.support.ImprovedMergeSort; qrkJ:
import org.rut.util.algorithm.support.ImprovedQuickSort; SGUZ'}
import org.rut.util.algorithm.support.InsertSort; 1+9}Xnxb
import org.rut.util.algorithm.support.MergeSort; x.ucsb
import org.rut.util.algorithm.support.QuickSort; 5uO.@0
import org.rut.util.algorithm.support.SelectionSort; VskdC?yIp
import org.rut.util.algorithm.support.ShellSort; 3}nkTZG
H&=fD` Xq
/** XG8UdR|
* @author treeroot sG:tyvln
* @since 2006-2-2 0xzS9
* @version 1.0 }HxC~J"
*/ [KNA5(Y0
public class SortUtil { n7iIY4gZ
public final static int INSERT = 1; IZ&FNOSZ+4
public final static int BUBBLE = 2; 18AlQ+')?w
public final static int SELECTION = 3; P*3PDa@
public final static int SHELL = 4; i?]`9z
public final static int QUICK = 5; 4N_iHe5U
public final static int IMPROVED_QUICK = 6; )5Ofr-Y
public final static int MERGE = 7; =m/BH^|&W
public final static int IMPROVED_MERGE = 8; 2A(IsUtqO:
public final static int HEAP = 9; hs?cV)hDS
KpfQ=~'
public static void sort(int[] data) { L /V;;
sort(data, IMPROVED_QUICK); OHK]=DH:M
} ;[!W*8.c
private static String[] name={ >m4HCs>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f#| wb~
}; O[\obi"}
]udH`{]
private static Sort[] impl=new Sort[]{ j[Oh>yG
new InsertSort(), lj"72
new BubbleSort(), `l}+BI`4
new SelectionSort(), Hi#f Qji
new ShellSort(), QO <.l`F
new QuickSort(), p[:E$#W~;
new ImprovedQuickSort(), uM@ve(8\
new MergeSort(), mE"},ksg
new ImprovedMergeSort(), BiD}C
new HeapSort() 0` UrB:
}; TmUN@h
}D*5PV%d
public static String toString(int algorithm){ :qrCqFl
return name[algorithm-1]; MznMt2-u
} zi= gOm
>;Vy{bL8
public static void sort(int[] data, int algorithm) { %617f=(E?!
impl[algorithm-1].sort(data); |5#iPw_wMY
} (VB-5&b
qL/XGIxL?
public static interface Sort { o 76QQ+hP
public void sort(int[] data); #ByrX\
} IT0 [;eqR
q+cx.Rc#
public static void swap(int[] data, int i, int j) { b";D*\=x
int temp = data; B'~CFj0W%=
data = data[j]; /6nj 4.xxc
data[j] = temp; g: ,*Y^T
} ;}QM#5Xdt
} } DQ KfS