[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; FX|lhwmc(
} KpbZnW}g
int i1=l; =7]Q6h@X
int i2=mid+1; aBVEk2 p
for(int cur=l;cur<=r;cur++){ %QsSR'`
if(i1==mid+1) .xz,pn}
data[cur]=temp[i2++]; X\^& nLa
else if(i2>r) svq9@!go
data[cur]=temp[i1++]; t2-nCRXEP
else if(temp[i1] data[cur]=temp[i1++]; k`7.p,;}U
else Nzi/3r7m
data[cur]=temp[i2++]; R3{*v =ov
} [mB(GL
} rxgVT4
tY$ty0y-e
} X|1_0
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改进后的归并排序: L >Ez-
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package org.rut.util.algorithm.support; %I|+_ z&x
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import org.rut.util.algorithm.SortUtil; $XQ;~i
(:y,CsR}4
/** }Uwkef.Q
* @author treeroot ySuLt@X
* @since 2006-2-2 zA'gb'MmW
* @version 1.0 -0KbdHIKb'
*/ L=$?q/=-
public class ImprovedMergeSort implements SortUtil.Sort { -M1~iOb
Hc&uE3=%sL
private static final int THRESHOLD = 10; S QM(8*:X
<(bCz>o|
/* R%)2(\
* (non-Javadoc) RlslF9f
* @!&Jgg53G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y( V3PnH
*/ K[#v(<)
public void sort(int[] data) { Qw6KX#n
int[] temp=new int[data.length]; wHt#'`5
mergeSort(data,temp,0,data.length-1); uzVG q!'H
} I_zk'
RvPniT(<?
private void mergeSort(int[] data, int[] temp, int l, int r) { PV]k3&y
int i, j, k; w$b+R8.n)
int mid = (l + r) / 2; y=oVUsG
if (l == r) (N*<\6kr
return; BS-:dyBw
if ((mid - l) >= THRESHOLD) ! =\DC,-CB
mergeSort(data, temp, l, mid); re ]Ste
else _d\u!giy
insertSort(data, l, mid - l + 1); C"U[ b%
if ((r - mid) > THRESHOLD) rTP5-4
mergeSort(data, temp, mid + 1, r); HeT6Dv
else n?ZL"!$
insertSort(data, mid + 1, r - mid); o%/-5-
]{Mci]H6T
for (i = l; i <= mid; i++) { _UH/}!nqB
temp = data; 2|0Qk&
} G.-h=DT]
for (j = 1; j <= r - mid; j++) { q:2aPfo&
temp[r - j + 1] = data[j + mid]; GCP{Z]u
} [xZ/ZWb/
int a = temp[l]; C-a*EG
int b = temp[r]; aDN6MZM
for (i = l, j = r, k = l; k <= r; k++) { B@"SOX
if (a < b) { *l>[`U+
data[k] = temp[i++]; {z5V{M(|w3
a = temp; vgh^fa!/
} else { j.=UI-&m
data[k] = temp[j--]; |<j,Tr1[
b = temp[j]; !"`@sd~
} -~vl+L
} RjR&D?dc
} %k3NT~
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/** [)Z'N/;0
* @param data '!j #X_;
* @param l .%x"t>]
* @param i ?qd,>
*/ i\kTm?BQZ
private void insertSort(int[] data, int start, int len) { F,p`-m[q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DEUd[
} `G=ztL!gq
} Ss@u,`pr
} Xmap9x
} Q vv\+Jp^
p3M#XC_H]
堆排序： @9}),hl`
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package org.rut.util.algorithm.support; a,/M'^YyN
8iMF8\
import org.rut.util.algorithm.SortUtil; bx hPjAL
B`?N,N"
/** Af2=qe
* @author treeroot EX`"z(L
* @since 2006-2-2 ]&Y#)ebs
* @version 1.0 7=7!| UV
*/ j3*M!fM9
public class HeapSort implements SortUtil.Sort{ 55 S\&Ad$
<^,o$b
/* (non-Javadoc) M!eoe5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N3uMkH-<
*/ ioB|*D<U2
public void sort(int[] data) { q[{:
MaxHeap h=new MaxHeap(); d&}pgb-Md
h.init(data); fH{9]TU_:
for(int i=0;i h.remove(); Zi 2o
System.arraycopy(h.queue,1,data,0,data.length); 1%$d D2
} &Q\_;
! (2-(LgA
private static class MaxHeap{ 89LpklD
]]el|
void init(int[] data){ E S#rs="
this.queue=new int[data.length+1]; $x?NNS_ "J
for(int i=0;i queue[++size]=data; ?8 SK\{9r6
fixUp(size); iBG`43;
} 1 L+=|*:
} A)\>#Dv
;;ER"N
private int size=0; "KMLk
YniZ( ~^K
private int[] queue; |ZS 57c:
7%{R#$F
public int get() { ^y:FjQC:
return queue[1]; T?W[Z_D
} nqZA|-}
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public void remove() { xj0cgK|!
SortUtil.swap(queue,1,size--); PV?]UUc'n<
fixDown(1); m!rwG(
} FhWmO
file://fixdown @@'nit
private void fixDown(int k) { 6exRS]BI
int j; <A)+|Y"^h6
while ((j = k << 1) <= size) { HH"$#T^-
if (j < size %26amp;%26amp; queue[j] j++; Y8)}PWMs
if (queue[k]>queue[j]) file://不用交换 xKY$L*
break; ~_'0]P\
SortUtil.swap(queue,j,k); y)6,0K {k
k = j; dSwm|kIa
} PKi_Zh.D
} }c} ( 5
private void fixUp(int k) { h2"9"*S1
while (k > 1) { !tI=`Ml[
int j = k >> 1; #;d)?
if (queue[j]>queue[k]) ;_iPm?Y8
break; VJ3hC[
SortUtil.swap(queue,j,k); wuKl-:S;Vs
k = j; #e*X0;m
} \3r3{X _<`
} [!G)$<
2A*/C7
} Wdo#?@m
T'8RkDI}-
} 3@G;'|z
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SortUtil： o w2$o\hC
; yyO0Ha
package org.rut.util.algorithm; X:Q$gO?[4
a'uU,Eb}#w
import org.rut.util.algorithm.support.BubbleSort; jPnO@H1
import org.rut.util.algorithm.support.HeapSort; *wwhZe4V
import org.rut.util.algorithm.support.ImprovedMergeSort; yLW/ -%I#u
import org.rut.util.algorithm.support.ImprovedQuickSort; $&IpX M]
import org.rut.util.algorithm.support.InsertSort; z5 Bi=~=#
import org.rut.util.algorithm.support.MergeSort; {DT4mG5
import org.rut.util.algorithm.support.QuickSort; eZNitGaU
import org.rut.util.algorithm.support.SelectionSort; DF'8GF&Rp
import org.rut.util.algorithm.support.ShellSort; nX._EC
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/** k,rWa
* @author treeroot FSU<Y1|XM
* @since 2006-2-2 H>.B99vp
* @version 1.0 >dk9f}7-
*/ ('t kZt%8
public class SortUtil { >!}`%pk(
public final static int INSERT = 1; QsOhz
public final static int BUBBLE = 2; =Ey`M#t;
public final static int SELECTION = 3; n>P!u71
public final static int SHELL = 4; Noh?^@T`Ov
public final static int QUICK = 5; vBNZ<L\|a
public final static int IMPROVED_QUICK = 6; }~Q5Y3]#~
public final static int MERGE = 7; 5[4Z=RP
public final static int IMPROVED_MERGE = 8; XrS\+y3
public final static int HEAP = 9; L,~MicgV
^uW%v2
public static void sort(int[] data) { uUG*0Lj
sort(data, IMPROVED_QUICK); 8.?E[~
} , H2YpZk
private static String[] name={ ANMYX18M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0KAj]5nvb
}; ID4~Gn
^Dr.DWi{$
private static Sort[] impl=new Sort[]{ ,-'4L9
new InsertSort(), 6e.v&f7(
new BubbleSort(), [9V]On
new SelectionSort(), F}U5d^!2
new ShellSort(), Fc8E Y*
new QuickSort(), JDv-O&]
new ImprovedQuickSort(), ?+r!z
new MergeSort(), m_*R.a
new ImprovedMergeSort(), qzK("d
new HeapSort() xQu eE{
}; g_w&"=.jBq
aI(>]sWJ
public static String toString(int algorithm){ ,+._;[k
return name[algorithm-1]; 5j eO"jB
} >|3a 9S
0@)%h&mD
public static void sort(int[] data, int algorithm) { frN3S
impl[algorithm-1].sort(data); Km3&N
} DA"}A`HfI
@T&t.|`
public static interface Sort { -[R!O'N9
public void sort(int[] data); F Z!J
} Y-p<qL|_
(ZP87Gz
public static void swap(int[] data, int i, int j) { ->E=&X
int temp = data; Ue$zH"w
data = data[j]; LK}-lZ` i
data[j] = temp; ['[KR BJL
} ? _<[T
} u1cu]Sj0