[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; eci\Q,
} AVZ@?aJgF
int i1=l; >,2],X"G
int i2=mid+1; U#4W"1~iX
for(int cur=l;cur<=r;cur++){ @/iLC6QF
if(i1==mid+1) ylJlICK
data[cur]=temp[i2++]; |7fBiVo
else if(i2>r) 6w,xb&S
data[cur]=temp[i1++]; ]x\wP7x
else if(temp[i1] data[cur]=temp[i1++]; 2>s;xZ@/'R
else 4v .6_ebL
data[cur]=temp[i2++]; u] b6>
} R/|o?qTrj
} =ByW`
Z%=E/xT
} S3fBZIPp
&x #5-O'
改进后的归并排序: ^j7pF.j
q<7n5kJ~
package org.rut.util.algorithm.support; JTJ4a8DE
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import org.rut.util.algorithm.SortUtil; 'r CR8>k
%Et]w
/** #>'0C6Xn
* @author treeroot bE"CSK#
* @since 2006-2-2 -9EbU7>!
* @version 1.0 g9JtWgu
*/ 7;{F"/A
public class ImprovedMergeSort implements SortUtil.Sort { NKws;/u
}Of^Y@{q.
private static final int THRESHOLD = 10; ;Wdo*ysW
ovp>"VuC
/* |zE7W
* (non-Javadoc) Pc<ZfO #
* lki(_@3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,D1QJPM
*/ (%1*<6ka
public void sort(int[] data) { 3@PVUJ0B|
int[] temp=new int[data.length]; lk|/N^8M
mergeSort(data,temp,0,data.length-1); _U %B1s3y
} zFIbCv8
X+iULr.^`~
private void mergeSort(int[] data, int[] temp, int l, int r) { .755-S
int i, j, k; ~7v^7;tT
int mid = (l + r) / 2; R.@GLx_zpQ
if (l == r) E_P]f%
return; <Bwu N,}
if ((mid - l) >= THRESHOLD) O{PRK5^h
mergeSort(data, temp, l, mid); _19k@a
else 4|qp&%9-
insertSort(data, l, mid - l + 1); &oBJY'1
if ((r - mid) > THRESHOLD) SWt"QqBU
mergeSort(data, temp, mid + 1, r); iBQftq7
else +t f=
insertSort(data, mid + 1, r - mid); -kO=pYP*O
9Bn dbSi
for (i = l; i <= mid; i++) { HDYf^mcW
temp = data; v-o/zud]]
} b\?`721BG
for (j = 1; j <= r - mid; j++) { $[d}g
temp[r - j + 1] = data[j + mid]; 9iUw7-)
} O3Uu{'=0
int a = temp[l]; Ur@3_F
int b = temp[r]; P VPwYmte
for (i = l, j = r, k = l; k <= r; k++) { <"-sN
if (a < b) { <NUZPX29
data[k] = temp[i++]; *\>&
a = temp; tU(6%zvR
} else { ^0 t`EZ$
data[k] = temp[j--]; -`( :L[
b = temp[j]; )S]c'}^
} V1+IqOXAIp
} eK`tFs,u
} w v1R ]3}
ixp%aRRP
/** /w|YNDA]j
* @param data B::vOg77
* @param l (wTg aV1
* @param i %Z.!Bm:
*/ pG (8VteH
private void insertSort(int[] data, int start, int len) { tlW}lN}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bY`k`3v
} Uc/%4Gx
} $h2h&6mH
} ;gF"o5/Q
} iaMZ37
GK)hK-
堆排序： n9#@ e}r
@E}4LTB
package org.rut.util.algorithm.support; 4|~o<t8
]WS 7l@
import org.rut.util.algorithm.SortUtil; ej0q*TH.
(h E^<jNR
/** )!0>2,R1
* @author treeroot wy7f7zIa
* @since 2006-2-2 Alrk3I3{
* @version 1.0 lwV#j}G
*/ n|8fdiK#}
public class HeapSort implements SortUtil.Sort{ $:>K-4X\}
G=wJz
/* (non-Javadoc) +] FdgmK:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) um[.r,++
*/ V ]Z{0
public void sort(int[] data) { QqRL>.)W
MaxHeap h=new MaxHeap(); rUlXx5f
h.init(data); w'}b 8m(L
for(int i=0;i h.remove(); >1W)J3
System.arraycopy(h.queue,1,data,0,data.length); 0;)4.*t
} y3d`$'7H>
xw`Pq6
private static class MaxHeap{ }e1f kjWk
SI-s:%O
void init(int[] data){ v&|o5om
this.queue=new int[data.length+1]; y<kW2<?
for(int i=0;i queue[++size]=data; %?K'egkp
fixUp(size); >]FRHJo_
} 6m?}oMz
} GP1b/n3F1
'?4B0=
private int size=0; g%Eb{~v
_pL:dKfy7
private int[] queue; u`g|u:(r
67^?v)|
public int get() { Rkgpa/te"
return queue[1]; !ouJ3Jn
} T-0fVTeN
"luMz;B
public void remove() { OLTgBXh
SortUtil.swap(queue,1,size--); `StlG=TB8
fixDown(1); Rjt]^gb!*
} Y$ZZ0m
file://fixdown oUoDj'JN{
private void fixDown(int k) { PCtf&U
int j; }Dp/K4
while ((j = k << 1) <= size) { 'Y`or14E
if (j < size %26amp;%26amp; queue[j] j++; *6<<6f`(
if (queue[k]>queue[j]) file://不用交换 ^O}`i
break; 0F/o
SortUtil.swap(queue,j,k); VBo=*gn,$
k = j; 0.!_k )tu
} WWZ`RY
} ].w~FUa
private void fixUp(int k) { g[4pG`z
while (k > 1) { NH~\kV
int j = k >> 1; sN"<baZ
if (queue[j]>queue[k]) MfQ 9d9
break; 4d-f6iiFV
SortUtil.swap(queue,j,k); OO#_0qK
k = j; F!ZE4S_
} \SKobO?qI
} =#0f4z
m9M#)<@*
} m) QV2n
_Fkz^B*
} mBN+c9n/
:8=7)cW
SortUtil： ~xCv_u^=
maTQ0GX
package org.rut.util.algorithm; }JI@f14
]-g9dV_[>j
import org.rut.util.algorithm.support.BubbleSort; XtCG.3(LY
import org.rut.util.algorithm.support.HeapSort; \:y oS>G
import org.rut.util.algorithm.support.ImprovedMergeSort; 6--t6>5
import org.rut.util.algorithm.support.ImprovedQuickSort; mUA!GzJ~u-
import org.rut.util.algorithm.support.InsertSort; Cg_9V4h.C
import org.rut.util.algorithm.support.MergeSort; ]sLdz^E3D
import org.rut.util.algorithm.support.QuickSort; pT|l"q@
import org.rut.util.algorithm.support.SelectionSort; J~}sQ{ 0
import org.rut.util.algorithm.support.ShellSort; zCji]:
!{q_Q !
/** 717S3knlv
* @author treeroot k~Z;S QyN
* @since 2006-2-2 {f"oqry_g
* @version 1.0 qf T71o(
*/ *q;u%; 4
public class SortUtil { {^":^N)
public final static int INSERT = 1; j[CXIz?c
public final static int BUBBLE = 2; gx9=L&=d
public final static int SELECTION = 3; X{Ij30Bmv
public final static int SHELL = 4; V!\'7-[R
public final static int QUICK = 5; OMfw#
public final static int IMPROVED_QUICK = 6; zt;aB>jz#
public final static int MERGE = 7; r(j:C%?}C
public final static int IMPROVED_MERGE = 8; ";jKTk7
public final static int HEAP = 9; 0YZ66VN!
k%R(Qga
public static void sort(int[] data) { |G)P I`BH
sort(data, IMPROVED_QUICK); 3tW}a`z9
} @ 3rJ$6W
private static String[] name={ Lb#PiTJI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Vkfc&+
}; %$_Y"82
vRb7=fXf
private static Sort[] impl=new Sort[]{ <m/XGFc
new InsertSort(), ?$MO!
new BubbleSort(), ]?T,J+S
new SelectionSort(), MU4BAN
new ShellSort(), P~84#5R1
new QuickSort(), +~EnrrT+W
new ImprovedQuickSort(), jx'hxC'3
new MergeSort(), 9*P-k.Bl
new ImprovedMergeSort(), :Wihb#TO)
new HeapSort() 1,Jy+1G0w
}; cv;2zq=T
M< H+$}[
public static String toString(int algorithm){ )-m/(-
return name[algorithm-1]; F$ckW'V
} !D!"ftOm
5&.I9}[)j
public static void sort(int[] data, int algorithm) { l,5isq ;m
impl[algorithm-1].sort(data); [b3$em<^JV
} K#Xl)h}y7
vR (nd
public static interface Sort { XT\2
public void sort(int[] data); He%v4S
} MAp#1+k
- _~\d+>w
public static void swap(int[] data, int i, int j) { N/[!$B0H@
int temp = data; ]x66/O\0u
data = data[j]; wb%4f6i
data[j] = temp; i*8j|
} \p%D;g+c
} \TLfLqA