[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; sY,q*}SLD
} )xtDiDB
int i1=l; |_7nvck
int i2=mid+1; (NPDgR/
for(int cur=l;cur<=r;cur++){ qC<!!473?
if(i1==mid+1) 5R6@A?vr
data[cur]=temp[i2++]; ETQ.A< v
else if(i2>r) H3< `
data[cur]=temp[i1++]; an!ceB
else if(temp[i1] data[cur]=temp[i1++]; ;`ZGiax
else Id-?her>B
data[cur]=temp[i2++]; V0yQ
} B]jI^(P
} &d/v/Y
_h;#\ )%~
} jn[%@zD}
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改进后的归并排序: :$eg{IXC"
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package org.rut.util.algorithm.support; G+Vlaa/7
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import org.rut.util.algorithm.SortUtil; 1%W|>M`
h!#!}|Q'
/** +Ja9p
* @author treeroot .CXe*Vbd
* @since 2006-2-2 0>PO4WFVJ
* @version 1.0 O}VI8OB(&
*/ 5G-)>
public class ImprovedMergeSort implements SortUtil.Sort { F^Q[P4>m\
%*4Gx +b
private static final int THRESHOLD = 10; w783e
'&_<!Nv3
/* G}.t!"
* (non-Javadoc) <3]Qrjl ,b
* &j2fh!\4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^ 'jJ~U
*/ b.Wf*I?
public void sort(int[] data) { 5|zISK%zHS
int[] temp=new int[data.length]; u[25U;xo
mergeSort(data,temp,0,data.length-1); {-X8MisI
} P=ARttT`(
\dpsyc
private void mergeSort(int[] data, int[] temp, int l, int r) { 6fxf|R\
int i, j, k; 9r@T"$V#c
int mid = (l + r) / 2; P(N$U^pj
if (l == r) F,B,D^WD
return; /*B^@G|]'
if ((mid - l) >= THRESHOLD) j\t"4=,n
mergeSort(data, temp, l, mid); +/idq
else mRIW9V
insertSort(data, l, mid - l + 1); U?dd+2^};t
if ((r - mid) > THRESHOLD) adEcIvN$
mergeSort(data, temp, mid + 1, r); &W1{o&
else 9p,<<5{
insertSort(data, mid + 1, r - mid); %trtP
T?=[6
for (i = l; i <= mid; i++) { F[ca4_lK
temp = data; RU`m|<
} ~;aSE
for (j = 1; j <= r - mid; j++) { neC]\B[Xm
temp[r - j + 1] = data[j + mid]; U4hsbraz
} S9Kay'.aJ(
int a = temp[l]; dm4dT59
int b = temp[r]; 7X|M\WUq
for (i = l, j = r, k = l; k <= r; k++) { }^J&D=J5V
if (a < b) { UYu 54`'kg
data[k] = temp[i++]; -:txmMT
a = temp; @=jcdn!\M
} else { LGb.>O^
data[k] = temp[j--]; ebF},Q(48
b = temp[j]; k]*DuVCOX
} #]`ejr:2O
} qwka77nNT
} 8'+XR`g:ax
Y4PU~l
/** 5S:&^ A<
* @param data .MO"8}]8Z
* @param l @Bfwb?&
* @param i Q!DQ!;Br6
*/ m4:b?[
private void insertSort(int[] data, int start, int len) { F8 4LMk?U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :z=/z!5:j
} h 9V9.'
} a.F6!?
} /wIev1Z!Y
} )4[{+OJa
[MM11K
堆排序： 3mWd?!+m=
#mqz*=L3
package org.rut.util.algorithm.support; NJ-cP m
uQ9/7"S
import org.rut.util.algorithm.SortUtil; }-{l(8-
JnX@eBNV
/** U4*5o~!=S
* @author treeroot (tGK~!cAv
* @since 2006-2-2 cTRQI3Oa>
* @version 1.0 e=nExY
*/ X~RET[L2
public class HeapSort implements SortUtil.Sort{ tR#uDE\wR
o{\@7'G
/* (non-Javadoc) 8xUmg&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1 sCF -r
*/ o?P(Fuf
public void sort(int[] data) { "42u0rH0J
MaxHeap h=new MaxHeap(); d>F=|dakL
h.init(data); ff"Clp
for(int i=0;i h.remove(); zqAK|jbL
System.arraycopy(h.queue,1,data,0,data.length); whP>'9t.w
} (E)/' sEb
Xmy(pV!PF
private static class MaxHeap{ ]4@z.1Mr
Dbr(Wg
void init(int[] data){ yS/ovd
this.queue=new int[data.length+1]; T8YqCT"EA<
for(int i=0;i queue[++size]=data; ,)+O.Lf7&.
fixUp(size); j#%*@]>Tg
} g#=^U`y
} R{.wAH(
Ki-CJy
private int size=0; z$p+l]
=Feavyx
private int[] queue; 6X5m1+ Oi^
De|@}@
public int get() { PpN+q:(
return queue[1]; WT(R =bLw
} ^sH1YE}0
=1n>vUW+J
public void remove() { &eY$(o-Hw
SortUtil.swap(queue,1,size--); =_cWCl^5
fixDown(1); Pw /wAUt
} <2y~7h:
file://fixdown FQi"OZHq
private void fixDown(int k) { RCNqHYR
int j; V&KH{j/P
while ((j = k << 1) <= size) { *cTN5S>
if (j < size %26amp;%26amp; queue[j] j++; n2-R[W^
if (queue[k]>queue[j]) file://不用交换 =}7wpTc,
break; @N.W#<IG
SortUtil.swap(queue,j,k); zE.4e&m%Z?
k = j; fx.FHhVu
} #.}Su+XF
} l)VMF44
private void fixUp(int k) { ]@ETQ8QN
while (k > 1) { ~PuPY:"
int j = k >> 1; 4E3HYZ
if (queue[j]>queue[k]) 1`_Mc ]
break; f%*-PW^*
SortUtil.swap(queue,j,k); aI|)m8>)X
k = j; A@'):V8_%C
} ika{>hbH
} >~J_9'gX6
4)9X) Qx
} SVXey?A;CJ
Re<X~j5]
} V6wYJ$]
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SortUtil： $yaE!.Kc
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package org.rut.util.algorithm; $.kIB+K
T:cSv @G
import org.rut.util.algorithm.support.BubbleSort; ;?inf`t
import org.rut.util.algorithm.support.HeapSort; |c8p{)
import org.rut.util.algorithm.support.ImprovedMergeSort; jopC\Z
import org.rut.util.algorithm.support.ImprovedQuickSort; \/K>Iv'$
import org.rut.util.algorithm.support.InsertSort; Q;r 0#"
import org.rut.util.algorithm.support.MergeSort; 7F?^gMi
import org.rut.util.algorithm.support.QuickSort; ; @Gm@d
import org.rut.util.algorithm.support.SelectionSort; &$hfAG]"
import org.rut.util.algorithm.support.ShellSort; :CHCVoh@95
XNu2G19jb
/** KU33P>a"[k
* @author treeroot .:RoD?px
* @since 2006-2-2 ~>}BDsM
* @version 1.0 AH=6xtS-
*/ Y<#7E;aL
public class SortUtil { XfbkK )d
public final static int INSERT = 1; `!m+g0
public final static int BUBBLE = 2; ['-ln)96.
public final static int SELECTION = 3; `34[w=Zm
public final static int SHELL = 4; W,Dr2$V
public final static int QUICK = 5; i8HSYA
public final static int IMPROVED_QUICK = 6; G=Ka{J
public final static int MERGE = 7; D zDt:.JZ
public final static int IMPROVED_MERGE = 8; o}WbW }&
public final static int HEAP = 9; 3L>V-RPiM
aeUm,'Y$
public static void sort(int[] data) { N@)4H2_u \
sort(data, IMPROVED_QUICK); Hg(\EEe
} ]iLfe&f
private static String[] name={ Iobo5B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,b{G(sF
}; Bfw>2
P!bm$h*3?
private static Sort[] impl=new Sort[]{ }aX).u
new InsertSort(), yJb;V#
new BubbleSort(), UQW;!8J#R(
new SelectionSort(), >y]YF3?
new ShellSort(), :X`J1E]Rjd
new QuickSort(), &2?kD{
new ImprovedQuickSort(), zP=J5qOZ8
new MergeSort(), sMO3eNLn
new ImprovedMergeSort(), PI0/=kS
new HeapSort() fvNGGn!
}; m@HU;J\I
XTW/3pB
public static String toString(int algorithm){ y'pG'"U]_
return name[algorithm-1]; 3wR5:O$H
} hDp'=}85@
;oR-\;]/.
public static void sort(int[] data, int algorithm) { 5&94VQ$d
impl[algorithm-1].sort(data); QX(:!b
} <j,7Z>Rk\x
kFk+TXLDIt
public static interface Sort { O~aS&g/sf
public void sort(int[] data); &a:>P>\
} nh9K(
kt;X|`V{5z
public static void swap(int[] data, int i, int j) { wRie{Vk
int temp = data; /[EI0~P
data = data[j]; k7W8$8v
data[j] = temp; 8%nTDSp&t
} g>f(5
} ;utjW1y