[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; -zFJ)!/?
} 8NfXYR#
int i1=l; ?z.?(xZ 6
int i2=mid+1; f]i"tqoI
for(int cur=l;cur<=r;cur++){ |#_p0yPy
if(i1==mid+1) w x]?D%l
data[cur]=temp[i2++]; Onq^|r's&
else if(i2>r) gkd4)\9
data[cur]=temp[i1++]; gk|>E[.
else if(temp[i1] data[cur]=temp[i1++]; oJ4HvrUO
else tY;<S}[@7w
data[cur]=temp[i2++]; 0I.KHIBk
} a]r+np]vTy
} t)&U'^
3Z";a
} ?+Gt?-! 5q
1L!;lP2
改进后的归并排序: !MKecRG_
)J[m>tyY5
package org.rut.util.algorithm.support; Z9DfwWI2nu
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import org.rut.util.algorithm.SortUtil; _|u}^MLO
AJ}FHym_ZQ
/** v/ N[)<
* @author treeroot 44u)F@)
* @since 2006-2-2 Yk|6?e{+)
* @version 1.0 +g g_C'"
*/ !CU-5bpu
public class ImprovedMergeSort implements SortUtil.Sort { %4LoEm=U
KyNu8s k
private static final int THRESHOLD = 10; K[icVT2v~
Q/SO%E`E
/* )Dz]Pv]H'
* (non-Javadoc) ym|7i9
* L?/AKg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S=,czs3N
*/ CK[8y&
public void sort(int[] data) { P4#i]7%
int[] temp=new int[data.length]; 3Rb#!tx9
mergeSort(data,temp,0,data.length-1); 4MPy}yT*
} ^y@ W\
@/^<9
private void mergeSort(int[] data, int[] temp, int l, int r) { C$[iduS
int i, j, k; $0 .6No_|
int mid = (l + r) / 2; W^8
if (l == r) d` ttWWPw
return; h,$CJdDY]
if ((mid - l) >= THRESHOLD) %e]G]B%
mergeSort(data, temp, l, mid); 7dY_b
else 6B8!}6Ojc
insertSort(data, l, mid - l + 1); .T3N"}7[
if ((r - mid) > THRESHOLD) j;`pAN('
mergeSort(data, temp, mid + 1, r); rci,&>L"
else av!;k2"
insertSort(data, mid + 1, r - mid); 1Rd|P<y
-rU_bnm
for (i = l; i <= mid; i++) { HX2u{2$
temp = data; UPPDs"
} 0%+TU4Xx
for (j = 1; j <= r - mid; j++) { H.Z:at5n
temp[r - j + 1] = data[j + mid]; 56AaviEC
} ]RQQg,|D
int a = temp[l]; }yU,_:
int b = temp[r]; /"Om-DK%
for (i = l, j = r, k = l; k <= r; k++) { h8O[xca/~
if (a < b) { @B~/0 9
data[k] = temp[i++]; 9QI\[lT&
a = temp; ?jBna ~
} else { ~-6Kl3Y
data[k] = temp[j--]; q'M-a tE.
b = temp[j]; oHbEHS61
} 'd1E~A
} 8sg8gBt
} .dVo[m;
QKbX^C
/** X1i6CEa<
* @param data |jaUVE_2[
* @param l &|26x >
* @param i U\ y?P:yy
*/ Om{[ <tL
private void insertSort(int[] data, int start, int len) { !/['wv@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W<B8PS$
} =[?2'riI
} 'e\m6~u\hm
} ^`\c;!)F<
} IX^k<Jqr
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堆排序： yGH'|`
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package org.rut.util.algorithm.support; JQE^ bcr
.7Ys@;>B
import org.rut.util.algorithm.SortUtil; @=b0>^\m
Hv<%_t_/
/** l8%x(N4
* @author treeroot M{:gc7%
* @since 2006-2-2 ,ibI@8;#~'
* @version 1.0 dt) BMF8
*/ -(qoz8H5
public class HeapSort implements SortUtil.Sort{ b2H!{a"
)"jG)c^1*
/* (non-Javadoc) }vxb, [#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hX 9.%-@sR
*/ 0:h;ots'
public void sort(int[] data) { @C7S^|eo
MaxHeap h=new MaxHeap(); m^O:k"+!
h.init(data); $ZXy&?4
for(int i=0;i h.remove(); r['T.yo
System.arraycopy(h.queue,1,data,0,data.length); 0d:t$2~C
} DhY9)>4M
iX.=8~3
private static class MaxHeap{ Rmn|"ZK
'9*wr*
void init(int[] data){ W2yNEiH
this.queue=new int[data.length+1]; %7O`]ik:
for(int i=0;i queue[++size]=data; g 6>RyjN
fixUp(size); }`IN5NdYp
} c$?qN&X_K
} 8b(UqyV
;MCv
private int size=0; dj?.Hc7od
u-pE ;|
private int[] queue; A86#7
8:L%-
public int get() { NV*aHci
return queue[1]; @*q\$Eg}2
} ?Hf^&yo
8S@ ~^D
public void remove() { @+Berb
SortUtil.swap(queue,1,size--); Otn,(j;u
fixDown(1); k^]+I%?Q
} _"a(vfl#
file://fixdown {+z+6i
private void fixDown(int k) { 8:$kFy\A'
int j; Q2^}NQO=
while ((j = k << 1) <= size) { M$%aX,nk'
if (j < size %26amp;%26amp; queue[j] j++; sryujb.,
if (queue[k]>queue[j]) file://不用交换 0UWLs_k:
break; W}WGg|ug
SortUtil.swap(queue,j,k); )+oDa{dZ
k = j; 88pz<$
} /Rx%}~x/m
} t{!}^{ "5
private void fixUp(int k) { emw3cQ
while (k > 1) { 8_Y{7;<ey
int j = k >> 1; 6O$OM
if (queue[j]>queue[k]) MrLDe{^C2
break; =^q:h<
SortUtil.swap(queue,j,k); O<iE,PN)
k = j; *u 3K8"XZ
} 6peO9]Zy
} #rzxFMA"
R7x4v
} `8xe2=Ub
}/(fe`7:
} ?*4&Z.~J
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SortUtil： }3lM+]pf
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package org.rut.util.algorithm; 4rwfY<G
"]kaaF$U%
import org.rut.util.algorithm.support.BubbleSort; V`S6cmwdc\
import org.rut.util.algorithm.support.HeapSort; GZXUB0W\@)
import org.rut.util.algorithm.support.ImprovedMergeSort; bX|Z||img
import org.rut.util.algorithm.support.ImprovedQuickSort; ~e~4S~{
import org.rut.util.algorithm.support.InsertSort; D>?%p"e
import org.rut.util.algorithm.support.MergeSort; ]8d]nftY
import org.rut.util.algorithm.support.QuickSort; zJ3{!E}`v
import org.rut.util.algorithm.support.SelectionSort; &Zd{ElM
import org.rut.util.algorithm.support.ShellSort; f*1.Vg0`-
2ztP'
/** bzk@6jR1
* @author treeroot -g;iMqh#
* @since 2006-2-2 -7'>Rw
* @version 1.0 {{SQL)yJ
*/ G0CmY43
public class SortUtil { ]#j]yGV
public final static int INSERT = 1; Rw^4S@~T
public final static int BUBBLE = 2; '2uQ
public final static int SELECTION = 3; 6}n_r}kNR
public final static int SHELL = 4; Xy_+L_h^
public final static int QUICK = 5; Z7K;~*
public final static int IMPROVED_QUICK = 6; vs7Hg)F
public final static int MERGE = 7; ="d}:Jl
public final static int IMPROVED_MERGE = 8; )(PA:j
public final static int HEAP = 9; +7^%fX;3pW
=MB[v/M59w
public static void sort(int[] data) { mAk)9`f/
sort(data, IMPROVED_QUICK); >e=tem~/
} t$]lK6
private static String[] name={ |M)'@s:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BtVuI5*h
}; Rl.3p<sX
SEIGs_^'\
private static Sort[] impl=new Sort[]{ Q;)[~p
new InsertSort(), ,K+K`"Oy
new BubbleSort(), (/v(.t
new SelectionSort(), 9{'GrL
new ShellSort(), ^7Z)/c`"
new QuickSort(), jU@qQ@|
new ImprovedQuickSort(), $ze%!C
new MergeSort(), Zh{Pzyp
new ImprovedMergeSort(), yJppPIW^
new HeapSort() dE.R$SM
}; \P^WUWY
eqZ V/a
public static String toString(int algorithm){ c,!Ijn\;(
return name[algorithm-1]; )f*&}SV
} uPr@xff
;} Ty b
public static void sort(int[] data, int algorithm) { Z8z.Xn
impl[algorithm-1].sort(data); Wf-i)oc4I
} TlQ#0_as[
Xb?P'nD
public static interface Sort { ?`uY*+u
public void sort(int[] data); Eu l,1yR
} -3_-n*k!
)0j^Fq5[+
public static void swap(int[] data, int i, int j) { ">v76%>Z7
int temp = data; =v:vc~G6
data = data[j]; }NMA($@A
data[j] = temp; 5T:e4U&
} HIk5Q'ek
} _o'ii VDuD