[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; .'7o,)pJ<
} dmrM %a}W-
int i1=l; #ZGWU_l}
int i2=mid+1; y)#Ib*?
for(int cur=l;cur<=r;cur++){ :d!.E$S
if(i1==mid+1) E<&VK*{zcO
data[cur]=temp[i2++]; ZT_EpT=1
else if(i2>r) ?^IM2}(p
data[cur]=temp[i1++]; g[@]OsX
else if(temp[i1] data[cur]=temp[i1++]; Mk[_yqoCO
else #\4uu
data[cur]=temp[i2++]; NP^kbF
} ;][1_
} [?Aq#av
~Cj+6CrT
} _.FxqH>
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改进后的归并排序: >&U]j*'4
kS?!"zk>
package org.rut.util.algorithm.support; Pd^ilRB
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import org.rut.util.algorithm.SortUtil; 0t*q5pAG".
%wvSD&oz
/** 0VsrAV0
* @author treeroot l!q i:H<=1
* @since 2006-2-2 "W:'cIw
* @version 1.0 $o1Gxz
*/ bEy j8=P;
public class ImprovedMergeSort implements SortUtil.Sort { <r3F*S=
S <|e/![@
private static final int THRESHOLD = 10; 0-4WLMx
]rHdG^0uss
/* se$GE:hC1Q
* (non-Javadoc) i':<Ro
* <(@m913|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )BS./zD*[<
*/ "2qp-'^[c
public void sort(int[] data) { 3=5+NJ'8
int[] temp=new int[data.length]; `<Zp!Hl(j
mergeSort(data,temp,0,data.length-1); Y@^MU->+
} S4`uNB#Ht
q^goi1
private void mergeSort(int[] data, int[] temp, int l, int r) { ; >.>vLF
int i, j, k; P",~8Aci(
int mid = (l + r) / 2; M.!U;U<?
if (l == r) kY4riZnm
return; kV6T#RVob
if ((mid - l) >= THRESHOLD) *]O[ZjyOY
mergeSort(data, temp, l, mid); t~ Q{\!
else ,p>=WX
insertSort(data, l, mid - l + 1); CQzJ_aSJ(
if ((r - mid) > THRESHOLD) sRb)*p'
mergeSort(data, temp, mid + 1, r); (K>5DU
else G4MNcy
insertSort(data, mid + 1, r - mid); PS!f&IY}[.
ShHm7+fV
for (i = l; i <= mid; i++) { cq %=DZ
temp = data; -~v;'zOO
} 6#.z:_
for (j = 1; j <= r - mid; j++) { e/F=5_Io
temp[r - j + 1] = data[j + mid]; Q6kkMLh
} nP4jOq*H
int a = temp[l]; pz@_%IUS
int b = temp[r]; g5X+iV
for (i = l, j = r, k = l; k <= r; k++) { O\B_=KWDO
if (a < b) { t#}/VnSQ
data[k] = temp[i++]; &d9tR\}
a = temp; p^7ZFUP
} else { GZ UDI#
data[k] = temp[j--]; +;pdG[N
b = temp[j]; [|xHXcW
} x:"_B
} :kflq
} TQ.d|{B[
?fc({zb
/** ?7/n s>}
* @param data ,H1j&]E!
* @param l Zz,E4+'Rm
* @param i yo") G!BN
*/ D*DCMMp=0
private void insertSort(int[] data, int start, int len) { !ZD[ $lt+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n4qj"xQ
} /)MzF6
} =MRg
} W!2(Ph*
} 9]Uvy|
Bj;Fy9[yb
堆排序： AnfJyltS
$^y6>@~
package org.rut.util.algorithm.support; TJp(
QrHI}r
import org.rut.util.algorithm.SortUtil; [F*t2 -ta
{SbA(a?B
/** y 7|x<Z
* @author treeroot h$G&4_O
* @since 2006-2-2 ~z^VMr
* @version 1.0 2W~,,$ G
*/ / \!hW-+]W
public class HeapSort implements SortUtil.Sort{ ;Pnz4Y4|eU
\NDSpT<Z
/* (non-Javadoc) $j)Er.!9|R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %f#3;tpC8
*/ a7)q^;:O
public void sort(int[] data) { kNMhMEez
MaxHeap h=new MaxHeap(); A+69_?B TH
h.init(data); G5Y 8]N
for(int i=0;i h.remove(); r,A750P^
System.arraycopy(h.queue,1,data,0,data.length); b-@6w(j
} `)*
x4pl#~Su
private static class MaxHeap{ 's8NO Xlj
H"tS33
void init(int[] data){ 5qGRz"\p~
this.queue=new int[data.length+1]; W> s@fN9
for(int i=0;i queue[++size]=data; KtA0 8?B
fixUp(size); w6'o<=
} nMNAn}~*M
} sFC&DTb?
j,8*Z~\5
private int size=0; /RT3r
Xl.h&x0? 8
private int[] queue; @c,}\"(
J@=1zL
public int get() { KCGs*kp>
return queue[1]; /iQ}DbtRb
} &G@(f=
'sn%+oN
public void remove() { #U{^L{1Gx
SortUtil.swap(queue,1,size--); 3o%JJIn&
fixDown(1); 3x#=@i
} VTa?y
file://fixdown tYC`?HT
private void fixDown(int k) { - (VV
int j; `Yn^ -W
while ((j = k << 1) <= size) { vHZw{'5y
if (j < size %26amp;%26amp; queue[j] j++; K8$Hg:Ky-/
if (queue[k]>queue[j]) file://不用交换 @sO*O4os>
break; \5BI!<
SortUtil.swap(queue,j,k); >&f .^p
k = j; gEcVQPD@
} (9CB&LZ(+E
} '""qMRCm
private void fixUp(int k) { .;u(uB;J6
while (k > 1) { 43W>4fsc
int j = k >> 1; R4"["T+L`
if (queue[j]>queue[k]) (d |
break; $h0]
SortUtil.swap(queue,j,k); OY*BVJ^
k = j; L,!Z
} a\$PqOB!
} +[V[{n
iNZ'qMH22
} @tdX=\[~
g^26Gb.
} 4xuL{z;\
!bFa\6]q
SortUtil： h6}oRz9=g
B!K{y>|.
package org.rut.util.algorithm; N#Bg`:!
s1<_=sfnT
import org.rut.util.algorithm.support.BubbleSort; y%Ui)UMnw]
import org.rut.util.algorithm.support.HeapSort; s03DL
import org.rut.util.algorithm.support.ImprovedMergeSort; 7uFM)b@.P
import org.rut.util.algorithm.support.ImprovedQuickSort; RXkE"H{
import org.rut.util.algorithm.support.InsertSort; [aU#"k)M
import org.rut.util.algorithm.support.MergeSort; 8XD9fB^
import org.rut.util.algorithm.support.QuickSort; Z'6 o$Xv
import org.rut.util.algorithm.support.SelectionSort; >|KfO>
import org.rut.util.algorithm.support.ShellSort; JAj<*TB.%
[-bL>8
/** W1$B6+}Z0V
* @author treeroot j_-$xz5-
* @since 2006-2-2 - o$S=
* @version 1.0 (k"|k
*/ vQ^a7
public class SortUtil { PorBB7iL
public final static int INSERT = 1; &STgj|t_
public final static int BUBBLE = 2; O?L_9L*
public final static int SELECTION = 3; ' jR83A*
public final static int SHELL = 4; XA5gosq
public final static int QUICK = 5; EJO:3aKa
public final static int IMPROVED_QUICK = 6; L,of@>
public final static int MERGE = 7; P1]ucu_y,
public final static int IMPROVED_MERGE = 8; -q[T0^eS
public final static int HEAP = 9; F IDNhu
_j-k*:
public static void sort(int[] data) { >^ 0JlL`XG
sort(data, IMPROVED_QUICK); cBb!7?6(
} fz31di9$
private static String[] name={ 8)&yjY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z7"8dlb
}; #M&rmKv)g
@g(N!n~
private static Sort[] impl=new Sort[]{ HUr;ysw
new InsertSort(), 64z9Yr@
new BubbleSort(), 6*cm
new SelectionSort(), /xJ,nwp7
new ShellSort(), d*khda;Vj
new QuickSort(), z[b,:G
new ImprovedQuickSort(), %+|k>?&z7
new MergeSort(), fu}NH\{
new ImprovedMergeSort(), @riCR<fF
new HeapSort() .*:SZ3v
}; f/H rO6~k%
?`_US7.@
public static String toString(int algorithm){ + _rjA_
return name[algorithm-1]; aj51%wKMb:
} .%+'Ts#ie
<.CO{L\e
public static void sort(int[] data, int algorithm) { CTp~bGIv!=
impl[algorithm-1].sort(data); N{46DS
} ag]b]K
e]!Vxn3
public static interface Sort { %h=)>5-T
public void sort(int[] data); kXzm
} g2L
B]ul~FX
public static void swap(int[] data, int i, int j) { H"WkZX
int temp = data; fc._*y#AS
data = data[j]; #`RYKQwB
data[j] = temp; =xQ7:TB
} fs&J%ku\
} A9qCaq{