[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; hH->%*
} =H %-.m'f2
int i1=l; uNHdpni
int i2=mid+1; MlJVeod
for(int cur=l;cur<=r;cur++){ ;' nL:\
if(i1==mid+1) vBvNu<v7te
data[cur]=temp[i2++]; ~gI{\iNF/
else if(i2>r) Kzb`$CGK
data[cur]=temp[i1++]; Sf/q2/r?6[
else if(temp[i1] data[cur]=temp[i1++]; wQ+dJ3b$
else spQLG_o,J
data[cur]=temp[i2++]; <w>/^|]#
} 1/ZR*fa
} pilh@#_h
=s}Xy_+:
} sM\lO
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改进后的归并排序: SQWafD
#FYAV%pi
package org.rut.util.algorithm.support; 3+xy4G@L
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import org.rut.util.algorithm.SortUtil; DjCx~@
p T[gdhc
/** _M,lQ~
* @author treeroot `Zz uo16
* @since 2006-2-2 C+F*690h
* @version 1.0 Qn:kz*:
*/ _2hXa!yO
public class ImprovedMergeSort implements SortUtil.Sort { @!Hr|k|
b-@\R\T
private static final int THRESHOLD = 10; P20|RvE
,>LRa
/* "Vd_CO
* (non-Javadoc) K3mAXC,d
* OQ4c#V?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rrs"N3!aT
*/ ,Vd7V}t
public void sort(int[] data) { T~gW3J
int[] temp=new int[data.length]; /.V0ag'G
mergeSort(data,temp,0,data.length-1); 8cm@a*2%
} -DO&_`kn
LH]CUfUrUE
private void mergeSort(int[] data, int[] temp, int l, int r) { X1A<$Am1
int i, j, k; ,smF^l
int mid = (l + r) / 2; cs_}&!c{
if (l == r) uD>z@J-v
return; beZ(o?uK
if ((mid - l) >= THRESHOLD) oP,9#FC|(
mergeSort(data, temp, l, mid); GlR~%q-jiQ
else , fb( WY
insertSort(data, l, mid - l + 1); Vm8D"I5i
if ((r - mid) > THRESHOLD) 8 #oR/Nt
mergeSort(data, temp, mid + 1, r); FA>1x*;c
else kJ=L2g>W<.
insertSort(data, mid + 1, r - mid); ,#'7)M D8
IS]{}Y\3H
for (i = l; i <= mid; i++) { .Gb+\E{M
temp = data; ;?IT)sNY
} b>cafu
for (j = 1; j <= r - mid; j++) { BIWD/|LQ
temp[r - j + 1] = data[j + mid]; Pg^h,2h
} FWPW/oC
int a = temp[l]; tLX,+P2|
int b = temp[r]; Q e1oT)
for (i = l, j = r, k = l; k <= r; k++) { zp=!8Av
if (a < b) { o;J;*~g
data[k] = temp[i++]; X<MpN5%|Wo
a = temp; -S; &Q'Mt
} else { 4/wwn6I}G
data[k] = temp[j--]; E`p'L!z
b = temp[j]; WOndE=(V
} 6w#nkF
} rS~qi}4X
} rm+v(&
PM~*|(fA
/** JmWR{du
* @param data {y);vHf$
* @param l W7!.#b(hU
* @param i kl{6]39
*/ I}:L]H{E
private void insertSort(int[] data, int start, int len) { z Bf;fi
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~Q!~eTw
} e`DsP8-&v
} q]v,
} a%[q |oyR
} 1*R_"#
4%bTj,H#
堆排序： \JU ~k5j
_'*DT=H'U
package org.rut.util.algorithm.support; {a4xF2
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import org.rut.util.algorithm.SortUtil; |[wyc!nY).
A#:8X1w
/** Rkv
* @author treeroot iwz` x
* @since 2006-2-2 'jbMTI
* @version 1.0 4 ?2g&B\
*/ Gm@iV,F%R
public class HeapSort implements SortUtil.Sort{ &|,s{?z2
ib Ue*Z["1
/* (non-Javadoc) O|(o8VS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -M`D>
*/ ]S]"`;Wh
public void sort(int[] data) { a#R%8)
MaxHeap h=new MaxHeap(); {_ 6t4h}
h.init(data); LY1KQuY
for(int i=0;i h.remove(); =|#w.(3y
System.arraycopy(h.queue,1,data,0,data.length); ho|8U
} (+$ol'i
qnTi_c
private static class MaxHeap{ tBTJmih"
j/`Up
void init(int[] data){ R8{e&nPE
this.queue=new int[data.length+1]; [,\i[[<
for(int i=0;i queue[++size]=data; ~GYpat
fixUp(size); (l;C%O7*
} .r6YrB@['
} DrV0V .t,
u mqKFM$
private int size=0; |%3O)B
Ix4jof6(
private int[] queue; 6o9sR)c ?
}RDb1~6C
public int get() { Dwk$CJb3-
return queue[1]; N7+#9S5fv
} ~e+0c'n\
|Pj9ZG#
public void remove() { n1JC?+
SortUtil.swap(queue,1,size--); dd19z%
fixDown(1); haik
} E.U0qK],
file://fixdown l92!2$]b
private void fixDown(int k) { CElPU`J,\[
int j; 7rJ9 }/<I
while ((j = k << 1) <= size) { 0~:eSWz=
if (j < size %26amp;%26amp; queue[j] j++; y 2cL2c$BT
if (queue[k]>queue[j]) file://不用交换 lbG}noqb
break; 8_+vb#M
SortUtil.swap(queue,j,k); U"/yB8!W
k = j; \&# p1K(H
} Qh 1q
} HUD7{6}4
private void fixUp(int k) { 6S2r
while (k > 1) { u% r!?-z
int j = k >> 1; q!9^#c
if (queue[j]>queue[k]) X!2.IsIS8
break; %e(9-M4*
SortUtil.swap(queue,j,k); .wM:YX'[G
k = j; .<0=a|IAz
} 2z[r@}3
} Q*,6X*W!~
(q~R5)D
} J.*[gt%O|
0P3j+? N%
} 8H&_,;
^!$} BY
SortUtil： uT'-B7N
,*q#qW!!
package org.rut.util.algorithm; .jLMl*6%:
Zj:a-=
import org.rut.util.algorithm.support.BubbleSort; QQ5lW
import org.rut.util.algorithm.support.HeapSort; x:=0.l#
import org.rut.util.algorithm.support.ImprovedMergeSort; %H 8A=
import org.rut.util.algorithm.support.ImprovedQuickSort; ev)rOcOU
import org.rut.util.algorithm.support.InsertSort; ',L{CQA?c
import org.rut.util.algorithm.support.MergeSort; cZCGnzy
import org.rut.util.algorithm.support.QuickSort; N)9pz?*V
import org.rut.util.algorithm.support.SelectionSort; Y]D7i?3N
import org.rut.util.algorithm.support.ShellSort; 03PN{<
<GbnPG?
/** .vCY%0oE
* @author treeroot eL]{#WL
* @since 2006-2-2 }<6oFUZ
* @version 1.0 N |OMj%Uk
*/ =)mXCA^
public class SortUtil { 4.,KEt'H
public final static int INSERT = 1; bEVO<x+
public final static int BUBBLE = 2; j;1~=j])
public final static int SELECTION = 3; N*_/@qM> a
public final static int SHELL = 4; N1D6D$s0
public final static int QUICK = 5; ws*~$x?7
public final static int IMPROVED_QUICK = 6; *#9VC)Q
public final static int MERGE = 7; 'd|Q4RE+W
public final static int IMPROVED_MERGE = 8; }:,o Y<
public final static int HEAP = 9; j AJ/
N#<zEAB
public static void sort(int[] data) { $[HcHnf
sort(data, IMPROVED_QUICK); Yio>ft&g]
} #i`A4D
private static String[] name={ _A@fP[C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4jC4X*
}; .g6PrhzFbk
2eZk3_w
private static Sort[] impl=new Sort[]{ h|(ZXCH
new InsertSort(), )OW(T^>_'I
new BubbleSort(), =j'J !M
new SelectionSort(), [H6X2yjj|
new ShellSort(), p=mCK@
new QuickSort(), E<X{72fb>
new ImprovedQuickSort(), )[@YHE5g
new MergeSort(), :Y}Y&mA4
new ImprovedMergeSort(), 7yqSt)/U
new HeapSort() + d+hvwEM
}; =!pu+&I 9
l0:e=q2Ax
public static String toString(int algorithm){ Z1)jRE2dl
return name[algorithm-1]; QK``tWLIg7
} 3<e(@W}n-M
]Omb :
public static void sort(int[] data, int algorithm) { Ef,7zKG
impl[algorithm-1].sort(data); O X5Co<u
} y(bt56 | z
/el["l
public static interface Sort { ] dm1Qm
public void sort(int[] data); %h/#^esi
} #x4h_K Y
D^N#E>,
public static void swap(int[] data, int i, int j) { `Q1WVd29
int temp = data; !TV_dKa
data = data[j]; !BvTJ-e)F
data[j] = temp; $ +GFOO
} |5<&r]xN
} He0N