[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; <@puWm[p
} IW<nfg
int i1=l; BlrZ<\-/
int i2=mid+1; yK3b^
for(int cur=l;cur<=r;cur++){ 6|-V{
if(i1==mid+1) RMfKM! vE
data[cur]=temp[i2++]; )=vQrMyB
else if(i2>r) ".Q``d&X
data[cur]=temp[i1++]; bI_T\Eft
else if(temp[i1] data[cur]=temp[i1++]; O^+H:Y|
else yD-L:)@"
data[cur]=temp[i2++]; 7ZsBYP8%
} k,mgiGrQ
} 7i$)iNW
sOY+X
} f0lpwwe
x&kM /z?/
改进后的归并排序: +"i|)yUYy}
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package org.rut.util.algorithm.support; &*4C{N
nbECEQ:|B
import org.rut.util.algorithm.SortUtil; bz1+AJG
kU {>hG4
/** 1YrIcovi-
* @author treeroot ZVin+z
* @since 2006-2-2 $xK2M
* @version 1.0 'fGB#uBt
*/ ip`oL_c
public class ImprovedMergeSort implements SortUtil.Sort { jrl'?`O
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private static final int THRESHOLD = 10; Hv~&RZpe
>$RQ
/* 0S%xm'|N
* (non-Javadoc) l 7XeZ} S
* nN]GO}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1j!LK-
*/ [K=M;$iQ
public void sort(int[] data) { a^ __Z3g,
int[] temp=new int[data.length]; :Q=tGj\G
mergeSort(data,temp,0,data.length-1); -*<4 hFb
} T|%pvTIe
=G9 9U/
private void mergeSort(int[] data, int[] temp, int l, int r) { <U]!1
int i, j, k; qq,#bRe
int mid = (l + r) / 2; 6` 8H k;
if (l == r) bl8EzO
return; 0,z3A>C
if ((mid - l) >= THRESHOLD) dx&!RK+
mergeSort(data, temp, l, mid); P"%QFt,
else =sYUzYm
insertSort(data, l, mid - l + 1); `Q@w*ta)
if ((r - mid) > THRESHOLD) @F-InfB8.
mergeSort(data, temp, mid + 1, r); Vx<`6uv
else XB.xIApmy
insertSort(data, mid + 1, r - mid); WEnI[JGe
{PTB]D'
for (i = l; i <= mid; i++) { <?&Y_
temp = data; ,Hzz:ce
} vR)f'+_Nz
for (j = 1; j <= r - mid; j++) { s<XAH7?0
temp[r - j + 1] = data[j + mid]; jv4O
} QH d^?H*
int a = temp[l]; F+m%PVW:
int b = temp[r]; 2YbI."ob
for (i = l, j = r, k = l; k <= r; k++) { D"z3SLFW{
if (a < b) { "?X,);5S
data[k] = temp[i++]; A5\00O~
a = temp; `k.Tfdu)K
} else { mdtG W
data[k] = temp[j--]; aob+_9o
b = temp[j]; nZbINhls
} 'e(]woe
} T)Zef
} Pss$[ %
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/** cs]h+yE
* @param data z]%c6ty
* @param l I,lX;~xb
* @param i ^5D%)@~
*/ ..K@'*u
private void insertSort(int[] data, int start, int len) { Xt.ca,`U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _ g8CvH)?!
} E-`3}"{
} ++=f7yu
} vmj'X>Q
} ixY[ HDPq
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堆排序： TlEd#XQgf&
j%`% DQ
package org.rut.util.algorithm.support; CiNOGSlDj
2bnYYQ14:
import org.rut.util.algorithm.SortUtil; 81}JX
(B^rW,V[R
/** +7KRoF|
* @author treeroot ;H4s[#K
* @since 2006-2-2 x##0s5Qn
* @version 1.0 GiK4LJ~cH)
*/ E~y(@72)
public class HeapSort implements SortUtil.Sort{ Vm*E^ v
W<@9ndvH
/* (non-Javadoc) ib\_MNIb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \:m1{+l
*/ KPrH1 [VU
public void sort(int[] data) { &|K9qa~)Y
MaxHeap h=new MaxHeap(); `6:B0-r
h.init(data); qI%X/'
for(int i=0;i h.remove(); z}a9%Fb
System.arraycopy(h.queue,1,data,0,data.length); fjd)/Gg
} =G9I7Y@
EvKzpxCh
private static class MaxHeap{ X=KC+1e
W8_$]}G8E
void init(int[] data){ sxn{uRF
this.queue=new int[data.length+1]; Rz#q68
for(int i=0;i queue[++size]=data; k.ttrKy<q/
fixUp(size); Q@ Ze+IhK`
} zMXQfR
} |[Rlg`TQ;*
~JS BZ@
private int size=0; h5Ee*De
>i_ #q$o
private int[] queue; l86gs6>
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public int get() { RuGG3"|
return queue[1]; fgoLN\
} 6]sP"
cSTF$62E
public void remove() { (6*
SortUtil.swap(queue,1,size--); v{X<6^g
fixDown(1); .%EYof
} 2}n7f7[/b
file://fixdown \2^o,1r/
private void fixDown(int k) { +'$5Jtz
int j; :>y;*x0w
while ((j = k << 1) <= size) { X`fb\}~R(
if (j < size %26amp;%26amp; queue[j] j++; pft-.1py
if (queue[k]>queue[j]) file://不用交换 t$e'[;w
break; +# 3e<+!F
SortUtil.swap(queue,j,k); '.wb= C
k = j; |->CI
} tE#;$Ss
} \^1S:z
private void fixUp(int k) { ox*>HkV
while (k > 1) { Ae[fW97
int j = k >> 1; 4a=QTq0p
if (queue[j]>queue[k]) aka)#0l .
break; FP'-=zgc
SortUtil.swap(queue,j,k); 7^7Jh&b)/
k = j; #U(kK(uO
} hv`I`[/J
} X;1yQ|su
Ms#rvn!J
} tZG l^mA"g
EsS$th)d
} P1R5}i
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SortUtil： ob;O,&e0>
n?778Wo}
package org.rut.util.algorithm; _G&gF.|
M-Ek(K3SRf
import org.rut.util.algorithm.support.BubbleSort; ^IKT!"J&?
import org.rut.util.algorithm.support.HeapSort; ^=k=;
import org.rut.util.algorithm.support.ImprovedMergeSort; RGL2S]UFs
import org.rut.util.algorithm.support.ImprovedQuickSort; PthgxB^
import org.rut.util.algorithm.support.InsertSort; 4.p:$/GTS
import org.rut.util.algorithm.support.MergeSort; D94bq_2}
import org.rut.util.algorithm.support.QuickSort; l,*5*1lM
import org.rut.util.algorithm.support.SelectionSort; Wu"1M^a
import org.rut.util.algorithm.support.ShellSort; as(/ >p
>=4('
/** W7. +
* @author treeroot la}cGZ; p.
* @since 2006-2-2 f^ja2.*%?
* @version 1.0 Eq%f`Qg+1E
*/ ^ L]e]<h(
public class SortUtil { 84!Hd.H
public final static int INSERT = 1; d%UzQ*s
public final static int BUBBLE = 2; Bf.iRh0Q5
public final static int SELECTION = 3; Z5p [*LMO
public final static int SHELL = 4; h*R w^5,c
public final static int QUICK = 5; 6?Kl L [~
public final static int IMPROVED_QUICK = 6; !TivQB
public final static int MERGE = 7; l/,la]!T
public final static int IMPROVED_MERGE = 8; qW`?,N)r
public final static int HEAP = 9; @C<ofg3E
&)jq3
public static void sort(int[] data) { \1SC:gN*#
sort(data, IMPROVED_QUICK); i),bAU!+m
} ap8q`a{j^
private static String[] name={ 4l7 Ny\J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K iEmvC
}; d@p#{ -
Wb>;L@jB7
private static Sort[] impl=new Sort[]{ 1_b*j-j
new InsertSort(), 14"+ctq
new BubbleSort(), 7{]dh+)
new SelectionSort(), d@ >i=l [
new ShellSort(), p="0Y<2l
new QuickSort(), J?dLI_{<
new ImprovedQuickSort(), v<t?t<|J
new MergeSort(), e_|Z&
new ImprovedMergeSort(), 4i PVpro
new HeapSort() KIcIYCBz
}; Z+u.LXc|c
qvLh7]sbK:
public static String toString(int algorithm){ yVgC1-8i*
return name[algorithm-1]; KIi:5Y
} JEk'2Htx
`KN>0R2k
public static void sort(int[] data, int algorithm) { F}7sb#G
impl[algorithm-1].sort(data); lKB9n}P
} l^d'8n
>[Wjzg
public static interface Sort { 0k{\W
public void sort(int[] data); =@0J:"c
} YVwpqOE.=
,l6,k<
public static void swap(int[] data, int i, int j) { 71y{Dwya
int temp = data; l -xc*lC
data = data[j]; x1?mE)n]
data[j] = temp; t,Ka] /I
} .1q}mw
} &y}7AV