[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; pB?a5jpA
} OkA-=M)RI:
int i1=l; #BlH)Cv
int i2=mid+1; uTB;Bva
for(int cur=l;cur<=r;cur++){ @RbAC*Y]g
if(i1==mid+1) ~~ )&? \N
data[cur]=temp[i2++]; 988aF/c
else if(i2>r) `d3S0N6@
data[cur]=temp[i1++]; ((;9%F:/$
else if(temp[i1] data[cur]=temp[i1++]; --",}%-
else CcAsJX~_
data[cur]=temp[i2++]; v+G}n\F
} ]WyV~Dzz<
} b^hCm`2w*
}[ux4cd8Y
} ?vf\_R'M
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改进后的归并排序: 8*6J\FE<p
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package org.rut.util.algorithm.support; PX2Ejrwj
7b@EvW6X}
import org.rut.util.algorithm.SortUtil; !i}G>*XH,
R%3H"FU9w
/** |W*f6F3
* @author treeroot !!Mp;h'}-
* @since 2006-2-2 De:w(Rm
* @version 1.0 pMa 3R3a
*/ glk I9~
public class ImprovedMergeSort implements SortUtil.Sort { Zb);08X
S)JZb_
private static final int THRESHOLD = 10; jcx/ZR
>`,v?<>+
/* !jYV,:'
* (non-Javadoc) <uv{/L b
* { H9pF2C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CAcnH
*/ w[4SuD
public void sort(int[] data) { Dtd bQF
int[] temp=new int[data.length]; pc-'+7Dh>
mergeSort(data,temp,0,data.length-1); Hvor{o5|tB
} 1T}|c;fc
mn0QVkb}lc
private void mergeSort(int[] data, int[] temp, int l, int r) { 7^|3TTK
int i, j, k; NSb< 7_L
int mid = (l + r) / 2; s#* mn
if (l == r) ;CAB.aB~
return; EY2s${26%
if ((mid - l) >= THRESHOLD) 36Wuc@<H
mergeSort(data, temp, l, mid); o~es>;
else z{!wQ~ j
insertSort(data, l, mid - l + 1); ]e?*7T]
if ((r - mid) > THRESHOLD) {6/%w,{,
mergeSort(data, temp, mid + 1, r); nV']^3b
else a[9;Okm#
insertSort(data, mid + 1, r - mid); Wuc,Cjm9(!
]*zF#Voc
for (i = l; i <= mid; i++) { 7M*+!al9
temp = data; YWq[)F@0G
} `4;<\VYCr
for (j = 1; j <= r - mid; j++) { K<+AJ(C
temp[r - j + 1] = data[j + mid]; * k=L
} 0Vy* 0\{S
int a = temp[l]; j#!J hi
int b = temp[r]; _DJ0MR~3
for (i = l, j = r, k = l; k <= r; k++) { 5l(;+#3y/
if (a < b) { OtQKDpJq
data[k] = temp[i++]; UK&E#i
a = temp; /!AdX0dx
} else { gfr``z=>O
data[k] = temp[j--]; ch :428
b = temp[j]; %@pTEhpF
} g08=D$P
} k"Sw,"e>+
} J>Zd75;U
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/** JanLJe)
* @param data \N"K^kR4
* @param l rt~X(S
* @param i pF"z)E|^
*/ by8d18:it
private void insertSort(int[] data, int start, int len) { B8a!"AQ~5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2M1yw "
} !L3Bvb;Q
} ~{d94o.
} \19XDqf8
} nMVThN*Ig
DB>>U>H-
堆排序： df8rf8B-
G]&:">&R
package org.rut.util.algorithm.support; t.knYO)
[$H8?J
import org.rut.util.algorithm.SortUtil; SB \ptF
!7bC\ {
/** dm,bZHo
* @author treeroot qRB%G<H
* @since 2006-2-2 aG=Y 6j G
* @version 1.0 VQo7se1P
*/ 7c;59$2(
public class HeapSort implements SortUtil.Sort{ ;\#u19
QMfYM~o
/* (non-Javadoc) QAb[M\G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^OA}#k NTW
*/ );Gt!]p`;
public void sort(int[] data) { zlFl{t
MaxHeap h=new MaxHeap(); wlKL|N
h.init(data); .!9]I'9M
for(int i=0;i h.remove(); 53(m9YLk
System.arraycopy(h.queue,1,data,0,data.length); w;#9 hW&
} \LM'KD pP_
7Uj[0Awn
private static class MaxHeap{ jj$'DZk
x$s#';*
void init(int[] data){ _=}Y lR
this.queue=new int[data.length+1]; H56e#:[$
for(int i=0;i queue[++size]=data; Ir}&|"~H
fixUp(size); Nw|Lrn*h!
} j83p[qR7o
} 8Q6il-
&"^A
private int size=0; t-E'foYfr`
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private int[] queue; DI$zyj~3
X.272q<.
public int get() { qt;6CzL C
return queue[1]; J-\b?Ra
} twO)b"0
hc[GpZcw,
public void remove() { ~i &K,
SortUtil.swap(queue,1,size--); VUNQ@{ST|1
fixDown(1); '0o`<xW
} uHf~KYL
file://fixdown aMz%H|/$
private void fixDown(int k) { {s`1+6_&Vz
int j; @cjhri|vH
while ((j = k << 1) <= size) { :Z< 5iLq
if (j < size %26amp;%26amp; queue[j] j++; {b#c0>.8-
if (queue[k]>queue[j]) file://不用交换 ::M/s#-@
break; YJ75dXc&&
SortUtil.swap(queue,j,k); -k<.Q=]<t
k = j; 2%@j<yS
} uF^+}Y ZT
} Cch1"j<k$
private void fixUp(int k) { mIr{Wocx
while (k > 1) { 2r* o
int j = k >> 1; iK.MC%8?
if (queue[j]>queue[k]) Dt+"E
break; g~V{Ca;}
SortUtil.swap(queue,j,k); CMF1<A4]
k = j; r/{VL3}F_e
} )8Q|y
} .upcUS8
(p2\H>pTr
} awC&xVf
RcHyePuF)R
} PGw"\-F
WV&BZ:H
SortUtil： H-rf?R2
liU=5BL
package org.rut.util.algorithm; MRJdQCBV
vb70~k
import org.rut.util.algorithm.support.BubbleSort; ,*%8*]<=
import org.rut.util.algorithm.support.HeapSort; ]X-ZRmB`
import org.rut.util.algorithm.support.ImprovedMergeSort; $*@mxwMQ}
import org.rut.util.algorithm.support.ImprovedQuickSort; eg,S(;VEt
import org.rut.util.algorithm.support.InsertSort; lYZHM,"
import org.rut.util.algorithm.support.MergeSort; >ZNL pJQ
import org.rut.util.algorithm.support.QuickSort; e3Lf'+G\
import org.rut.util.algorithm.support.SelectionSort; &Owt:R)9~
import org.rut.util.algorithm.support.ShellSort; goHr#@
IXg${I}_Q
/** glv(`cQ
* @author treeroot | z('yy$
* @since 2006-2-2 9(@bjL465
* @version 1.0 5Y,e}+I>
*/ F]ALZxwkz
public class SortUtil { gVI*`$
public final static int INSERT = 1; -m+2l`DLy
public final static int BUBBLE = 2; ^#Wf
public final static int SELECTION = 3; Z]Qm64^I
public final static int SHELL = 4; Y@r#:BH)
public final static int QUICK = 5; o86}NqK
public final static int IMPROVED_QUICK = 6; kv'n W
public final static int MERGE = 7; {QhvHV
public final static int IMPROVED_MERGE = 8; D!X{9q}S1
public final static int HEAP = 9; fIBLJ53
-|3U0:'m
public static void sort(int[] data) { ^iI^)
sort(data, IMPROVED_QUICK); |]I?^:I
} Ik}*7D
private static String[] name={ O=-|b kO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C'=C^X%
}; ;pULJ}rDb
O}KT>84M
private static Sort[] impl=new Sort[]{ Xz5=fj&
new InsertSort(), VyI%^S ]sS
new BubbleSort(), .KB*u*h
new SelectionSort(), :zZtZT!
new ShellSort(), e~-Dk .i
new QuickSort(), TIvLY5 HG
new ImprovedQuickSort(), 6}|vfw
new MergeSort(), jV7q)\uu^
new ImprovedMergeSort(), r[?rwc^
new HeapSort() %`}Qkb/Lyh
}; wIY#TBu
!W3Le$aL
public static String toString(int algorithm){ -bj1y2)n
return name[algorithm-1]; ]-AT(L>
} Z6 aT%7}}
3'']q3H
public static void sort(int[] data, int algorithm) { l'o}4am
impl[algorithm-1].sort(data); P/y-K0u
} ^X_%e|
W&*{j;e9%I
public static interface Sort { t4JGd)r
public void sort(int[] data); w6cPd'
} $>BP}V33
qt1#P
public static void swap(int[] data, int i, int j) { qM9GW`CKA
int temp = data; s@q54
data = data[j]; d>aZpJ[.
data[j] = temp; \J13rL{<
} Q2NS>[
} i/$lOde