[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; Qo;#}%}^^
} )Mj $/
int i1=l; eX@7f!uz
int i2=mid+1; J\V.J/
for(int cur=l;cur<=r;cur++){ 3Ta<7tEM
if(i1==mid+1) {BlKVsQ
data[cur]=temp[i2++]; Ud8*yB
else if(i2>r) ,@'M'S
data[cur]=temp[i1++]; xFY< ns
else if(temp[i1] data[cur]=temp[i1++]; ~1yMw.04V
else bhb*,iWA
data[cur]=temp[i2++]; !(wH}ti
} k;9"L90
} 2og8VI
GXE6=BO
} @\UoZv(
j$8i!C
改进后的归并排序: q T pvz
Y4B<]C4
package org.rut.util.algorithm.support; J|BZ{T}d
VF<C#I
import org.rut.util.algorithm.SortUtil; XN=Cq*3}
66+y@l1
/** t9Nu4yl
* @author treeroot m*^|9*dIC
* @since 2006-2-2 l6S6Y
* @version 1.0 S"z cSkF
*/ ]$vJK
public class ImprovedMergeSort implements SortUtil.Sort { N3`W%ws`~
2%DleR'i
private static final int THRESHOLD = 10; P6E=*^^m(
+L$,jZqS
/* v8`)h<:W?
* (non-Javadoc) Twj?SV
* *I(g~p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XI*_ti
*/ C;jV{sb9c
public void sort(int[] data) { Q#i^<WUpg
int[] temp=new int[data.length]; _x.D< n=X
mergeSort(data,temp,0,data.length-1); g}-Ch#
} P"g Y|}|
+HK)A%QI
private void mergeSort(int[] data, int[] temp, int l, int r) { yeCR{{B/'
int i, j, k; <9s=K\-
int mid = (l + r) / 2; f2#9E+IQ
if (l == r) R "&(Ae?LR
return; /Lc= K<
if ((mid - l) >= THRESHOLD) 2z\4?HJy
mergeSort(data, temp, l, mid); 7Pc0|Z/
else P~+?:buqc
insertSort(data, l, mid - l + 1); _uO#0 )l
if ((r - mid) > THRESHOLD) |@-%x.y
mergeSort(data, temp, mid + 1, r); i~IQlyGr.
else B9Dh^9?L
insertSort(data, mid + 1, r - mid); Qw$"W/&X
r $du-U
for (i = l; i <= mid; i++) { $J |oVVct
temp = data; Dk'EKT-
} xmDX1sL**
for (j = 1; j <= r - mid; j++) { Ohm>^N;
temp[r - j + 1] = data[j + mid]; >q&Q4E0
} (Jw[}&+
int a = temp[l]; !k&~|_$0@
int b = temp[r]; [LonY49
for (i = l, j = r, k = l; k <= r; k++) { ,qRSB>5c
if (a < b) { {tE/Jv $
data[k] = temp[i++]; %(-YOTDr
a = temp; Or9@X=C
} else { ~EU[?
data[k] = temp[j--]; f$E66yG
b = temp[j]; ~PNO|]8j
} ."Yub];H
} xrT_ro8
} j}R4mh
6bg+U`&g
/** 0NSn5Hq
* @param data |zu>G9m
* @param l 7[-jr;v
* @param i v.1= TBh
*/ (oxe\Qk
private void insertSort(int[] data, int start, int len) { 'D-#,X C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &F}1\6{fL
} 6QRfju'
} =3=KoH/'
} zJMKgw,i*
} l\^q7cXG
'KGY;8<x]
堆排序： e![Q1!r
lq@Vb{Z
package org.rut.util.algorithm.support; AEwb'
{K'SOhH4?
import org.rut.util.algorithm.SortUtil; kXC.rgal
04;y%~,}U/
/** 7/vr!tbL`p
* @author treeroot FGx_qBG4|
* @since 2006-2-2 LM'` U-/e$
* @version 1.0 v%<_Mh
*/ t%z7#}9$
public class HeapSort implements SortUtil.Sort{ IQ{Xj3;?y
3i(k6)H$4
/* (non-Javadoc) MatC2-aV1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bT-G<h*M
*/ (?\ZN+V)
public void sort(int[] data) { gE=~.P[ZX
MaxHeap h=new MaxHeap(); fnnwe2aso
h.init(data); vP}K(' (
for(int i=0;i h.remove(); ^qbX9.\
System.arraycopy(h.queue,1,data,0,data.length); +$>ut r
} ):78GVp
Q]xW}5 /
private static class MaxHeap{ QBsDO].J<
w#mnGD
void init(int[] data){ sW2LNE
this.queue=new int[data.length+1]; `^J~^Z7Y-
for(int i=0;i queue[++size]=data; ,P"R.A
fixUp(size); <(p1 j0_Q
} l*Y~h3
} 3R#<9O
W,{`)NWg
private int size=0; _R(5?rG,
Y)u}+Yg
private int[] queue; SbnVU[
3}:pD]`h
public int get() { C6"!'6 W
return queue[1]; 2K*-uT#$~
} ]|`gTD6
paBGJ~{=
public void remove() { el|t6ZT*
SortUtil.swap(queue,1,size--); ~POeFZ
fixDown(1); Br~%S?4"o
} oh@r0`J]x
file://fixdown 3`9*Hoy0c
private void fixDown(int k) { PYHm6'5BtB
int j; "(efd~.]
while ((j = k << 1) <= size) { x#8=drh.:C
if (j < size %26amp;%26amp; queue[j] j++; ,t+ATaOF
if (queue[k]>queue[j]) file://不用交换 r3j8[&B"
break; )vU{JY;
SortUtil.swap(queue,j,k); Ic=V:
k = j; H+5]3>O-$
} aY:(0en]&
} k13/yiv
private void fixUp(int k) { +~fu-%,k
while (k > 1) { M.8!BB7\8e
int j = k >> 1; : m5u=:t
if (queue[j]>queue[k]) :s'%IGy>:
break; .V.N^8(:a
SortUtil.swap(queue,j,k); dY-a,ch"8p
k = j; >Au<y,Tw
} >A,WXzAK}S
} 3N*Shzusbt
2mlE;.}8
} $GO'L2oLwn
^p7(
} rbtV,Y
4P~<_]yf
SortUtil： \~)573'
2@&|hd=-
package org.rut.util.algorithm; CXQ?P
8S02 3
import org.rut.util.algorithm.support.BubbleSort; `2fuV]FW
import org.rut.util.algorithm.support.HeapSort; P~qVr#eU
import org.rut.util.algorithm.support.ImprovedMergeSort; &"kx(B
import org.rut.util.algorithm.support.ImprovedQuickSort; 0 j.Sb2
import org.rut.util.algorithm.support.InsertSort; JZXc1R| 9
import org.rut.util.algorithm.support.MergeSort; Ksp;bfe
import org.rut.util.algorithm.support.QuickSort; $Tur"_`I;
import org.rut.util.algorithm.support.SelectionSort; .E}});l
import org.rut.util.algorithm.support.ShellSort; aXJe"IT.u
Q]7Q
/** 2DC#PX)i
* @author treeroot .~U9*5d
* @since 2006-2-2 l46F3C|
* @version 1.0 0/gcSW b
*/ ;?o C=c
public class SortUtil { Ii,:+o%
public final static int INSERT = 1; p_AV3
public final static int BUBBLE = 2; h^0mjdSp,
public final static int SELECTION = 3; 4AM*KI
public final static int SHELL = 4; !qpu /
public final static int QUICK = 5; P8VU&b\
public final static int IMPROVED_QUICK = 6; `l+SJLyJ%
public final static int MERGE = 7; J9 =gv0
public final static int IMPROVED_MERGE = 8; bvx:R ~E$
public final static int HEAP = 9; %pp+V1FH
~?&ijhZ
public static void sort(int[] data) { G'py)C5;
sort(data, IMPROVED_QUICK); w?tKL0c
} o/zCXZnw#
private static String[] name={ X2uX+}h*tA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [dJ\|=
}; EC~t'v
;9PM?Iy[
private static Sort[] impl=new Sort[]{ vRq xZN
new InsertSort(), DsX>xzM
new BubbleSort(), ZH(.|NaH
new SelectionSort(), dvD<>{U,8
new ShellSort(), LbR-uc?x
new QuickSort(), WNb$2q=
new ImprovedQuickSort(), RrHnDO'
new MergeSort(), EDo@J2A
new ImprovedMergeSort(), vOK;l0%
new HeapSort() Xu_<4
}; S2R[vB4).
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public static String toString(int algorithm){ `g1Oon_
return name[algorithm-1]; ]1&9~TL
} ~{+{pcO}
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public static void sort(int[] data, int algorithm) { #I?iR3u
impl[algorithm-1].sort(data); n{t',r50
} '| }}og
_o.Z`]
public static interface Sort { 4iz&"~&1
public void sort(int[] data); ]K7 64}
} V)2_T!e%*
=b7&(x
public static void swap(int[] data, int i, int j) { dNQSbp
int temp = data; vy@Lu cB
data = data[j]; pD#"8h
data[j] = temp; doc
} aHC;p=RQ\A
} .e"Qv*[^