[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; iJI }TVep#
} I3{PZhU.
int i1=l; CAig]=2'
int i2=mid+1; :S{BbQ){]
for(int cur=l;cur<=r;cur++){ \j}ZB<.>
if(i1==mid+1) K^)Eb(4
data[cur]=temp[i2++]; \_VA50
else if(i2>r) hohfE3rd
data[cur]=temp[i1++]; T[w]o}>cW
else if(temp[i1] data[cur]=temp[i1++]; $ZhFh{DQ.
else b4%??"&<Y
data[cur]=temp[i2++]; !3c\NbU
} w_"E*9
} ONB{_X?
@p9i
} )Yh+c=6 ?
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改进后的归并排序: MIeU,KT#U
a_^\=&?'
package org.rut.util.algorithm.support; /Vx7mF:
]Grek<
import org.rut.util.algorithm.SortUtil; :".ARCg
]`!>6/[
/** ,a{P4Bq
* @author treeroot o=:9y-nH
* @since 2006-2-2 u"r`3P`
* @version 1.0 D#9m\o_
*/ ?um;s-x)
public class ImprovedMergeSort implements SortUtil.Sort { wy<S;
dK$XNi13.5
private static final int THRESHOLD = 10; %OL$57Ia
^&9zw\x;z
/* Hs;4lSyUO
* (non-Javadoc) k{R>
* 60^`JVGWH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p;`>e>$
*/ {K~'K+TPu
public void sort(int[] data) { nY[WRt w
int[] temp=new int[data.length]; 6IN e@
mergeSort(data,temp,0,data.length-1); hIYNhZv
} y1jCg%'H
1W c=5!
private void mergeSort(int[] data, int[] temp, int l, int r) { nK1Slg#U
int i, j, k; >mbHy<<
int mid = (l + r) / 2; 9d0@wq.
if (l == r) =g7x' kN
return; G{As,`{
if ((mid - l) >= THRESHOLD) ih-#5M@
mergeSort(data, temp, l, mid); gMi0FO'
else ]\-A;}\e
insertSort(data, l, mid - l + 1); ch*8B(:
if ((r - mid) > THRESHOLD) &@X<zWg
mergeSort(data, temp, mid + 1, r); p%up)]?0
else Pa>AWOG'
insertSort(data, mid + 1, r - mid); \i>?q
Fk&c=V;SU
for (i = l; i <= mid; i++) { x /(^7#u,
temp = data; 2lZ Q)
} {r,.!;mHu
for (j = 1; j <= r - mid; j++) { Q^P}\wb>
temp[r - j + 1] = data[j + mid]; 9 &dtd
} ^ox=HNV
int a = temp[l]; j.[.1G*("
int b = temp[r]; zF`0J
for (i = l, j = r, k = l; k <= r; k++) { >.Pnkx*
if (a < b) { L8@f-Kk
data[k] = temp[i++]; c`)\Pb/O
a = temp; etQCzYIhn
} else { udK%>
data[k] = temp[j--]; '?{OZXg
b = temp[j]; EgEa1l!NSQ
} dM.f]-g
} pHGYQ;:L
} GhAlx/K
N@4w! HpJ
/** B&M%I:i
* @param data SBu"3ym
* @param l $j%'{)gK
* @param i L]|gZ&^
*/ n1ZbRV
private void insertSort(int[] data, int start, int len) { (!u~CZ;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^cC,.Fdw
} {S]}.7`l9(
} 93>jr<A
} *g"Nq+i@
} 1/B>XkCJ
U7,e/?a
堆排序： |w~nVRb
ZoW?nxY
package org.rut.util.algorithm.support; G`D`Af/B
vQG5*pR*w
import org.rut.util.algorithm.SortUtil; |u% )gk
P-_6wfg,;>
/** Rxt^v+ ,$
* @author treeroot [C 7^r3w
* @since 2006-2-2 e-/&$Qq
* @version 1.0 ZL&qp04}
*/ r.=K~A
public class HeapSort implements SortUtil.Sort{ R{`(c/%8
4/~E4"8
/* (non-Javadoc) gT{Q#C2Baw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) biD$qg
*/ <18(
public void sort(int[] data) { 'T;P;:!\
MaxHeap h=new MaxHeap(); _IHV7*u{;
h.init(data); :1Xz4wkWS*
for(int i=0;i h.remove(); >0y'Rgfe
System.arraycopy(h.queue,1,data,0,data.length); ;3coP{
} _#E0g'3
:wyno#8`-
private static class MaxHeap{ Vi$~-6n&
\##zR_%
void init(int[] data){ BN5[,J
this.queue=new int[data.length+1]; %bn jgy
for(int i=0;i queue[++size]=data; Mmj;-u
fixUp(size); |*eZD-f
} 8P\G}
} 5X$jl;6
1p3z1_wrs
private int size=0; V*;(kEqj
|-67\p]
private int[] queue; np^N8$i:n
dm0R[[7
public int get() { yx8z4*]kH
return queue[1]; wo{gG?B
} qbN =4
A1$TXr
public void remove() { \A#41
SortUtil.swap(queue,1,size--); Igt#V;kK"2
fixDown(1); LKB$,pR~1l
} \;,+
file://fixdown Oc0a77@
private void fixDown(int k) { U[-o> W#
int j; H [\o RId
while ((j = k << 1) <= size) { ]L.O8
if (j < size %26amp;%26amp; queue[j] j++; q'F+OQb1
if (queue[k]>queue[j]) file://不用交换 <?.&^|kS
break; rl;~pO5R9
SortUtil.swap(queue,j,k); yjX9oxhtL
k = j; K&]G3W%V
} Hyl%mJ
} .p3,O6y2(F
private void fixUp(int k) { 3BJ0S.TF
while (k > 1) { Xza(k
int j = k >> 1; (*'f+R`$
if (queue[j]>queue[k]) &-6Gc;f8
break; 2 c{34:
SortUtil.swap(queue,j,k); s WvBv
k = j; ,AFu C<
} lIS-4QX1
} e{K 215
-zgI_u9=EB
} hBUn \~z
nPl?K:(
} 8C:z"@o
I-*S&SiXjI
SortUtil： $szqy?i0?
5r|,CQ7o
package org.rut.util.algorithm; OX!tsARC@
n5NsmVW\x
import org.rut.util.algorithm.support.BubbleSort; ES7>H
import org.rut.util.algorithm.support.HeapSort; -<!NXm|kvz
import org.rut.util.algorithm.support.ImprovedMergeSort; }B+C~@j
import org.rut.util.algorithm.support.ImprovedQuickSort; j{A y\n(
import org.rut.util.algorithm.support.InsertSort; "Ac-tzhE
import org.rut.util.algorithm.support.MergeSort; DV-d(@`K
import org.rut.util.algorithm.support.QuickSort; %s|Ely)
import org.rut.util.algorithm.support.SelectionSort; X`>i&I]
import org.rut.util.algorithm.support.ShellSort; E6ElNgL
hx%v+/
/** t\,PB{P:J
* @author treeroot m}t`FsB.
* @since 2006-2-2 WX?IYQ+
* @version 1.0 k$R-#f;
*/ KwSqKI7]0
public class SortUtil { HCs?iJ
public final static int INSERT = 1; $a"Oc
public final static int BUBBLE = 2; a~}OZ&PG
public final static int SELECTION = 3; 1};Stai'
public final static int SHELL = 4; !)0;&e5
public final static int QUICK = 5; 5x4yyb'
public final static int IMPROVED_QUICK = 6; Id .nu/
public final static int MERGE = 7; ?M9=yA
public final static int IMPROVED_MERGE = 8; ChPmX+.i_
public final static int HEAP = 9; vMH
:q%M_
public static void sort(int[] data) { #rfiD%c
sort(data, IMPROVED_QUICK); UECK:61Me
} f+,qNvBY/
private static String[] name={ [!#L6&:a8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w-MCZwCr)
}; q"8ea/
K=h9Ce
private static Sort[] impl=new Sort[]{ /]Md~=yNp
new InsertSort(), h2]P]@nW;W
new BubbleSort(), xj;H&swo
new SelectionSort(), ~IBP|)WA-
new ShellSort(), qiBVGH
new QuickSort(), :>f )g
new ImprovedQuickSort(), @,7GaK\
new MergeSort(), Ai?*s%8v
new ImprovedMergeSort(), ,Uqs1#r
new HeapSort() joAv{Tc
}; Zt{[*~
~-Qw.EdC
public static String toString(int algorithm){ e\zm7_+i{
return name[algorithm-1]; $>eCqC3
} {Gk1vcq
ZG8DIV\D7
public static void sort(int[] data, int algorithm) { D.u{~
impl[algorithm-1].sort(data); mL{6L?
} "&?kC2Y|
^A&1^B
public static interface Sort { Flm%T-Dl
public void sort(int[] data); ~4Fvy'
} >tV{Pd1
sBg.u
public static void swap(int[] data, int i, int j) { %pL''R9VF
int temp = data; 0znR0%~
data = data[j]; _8UU'1d
data[j] = temp; 'S&zCTX7j
} wE`]7mA
} =>v#4zFd