[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; %cASk>^i
} 3M>y.MS
int i1=l; milQxSpj
int i2=mid+1; 1/SB[[g
for(int cur=l;cur<=r;cur++){ -o57"r^x
if(i1==mid+1) 1U ='"
data[cur]=temp[i2++]; ^UyN)eX
else if(i2>r) {'#7b# DB>
data[cur]=temp[i1++]; ;|f]e/El
else if(temp[i1] data[cur]=temp[i1++]; }MtORqK
else M`xI N~
data[cur]=temp[i2++]; 4thPR}DH}
} `R*!GHro
} jEK{47i v
id]}10
} ,/[1hhP@
Ld=6'C8ud
改进后的归并排序: x[$:^5V
;}k_
package org.rut.util.algorithm.support; T;i+az{N:V
VYrs4IFT$
import org.rut.util.algorithm.SortUtil; A$?o3--#]G
TBgiA}|\D
/** 2(R{3E4.
* @author treeroot g^^^fKUp)
* @since 2006-2-2 <iM}p^jX9
* @version 1.0 T%**:@}+
*/ $=Tq<W*c
public class ImprovedMergeSort implements SortUtil.Sort { @FN1o4&3
iu{QHjZK(
private static final int THRESHOLD = 10; rEs!gGNN
{wD "|K
/* P5'VLnE R{
* (non-Javadoc) lT'V=,Y t
* f1U:_V^d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !0cb f&^:
*/ xww\L &y
public void sort(int[] data) { OGW0lnQ/
int[] temp=new int[data.length]; jjg&C9w T
mergeSort(data,temp,0,data.length-1); w# ;t$qz}
} l!IN#|{(
#vTF:r
private void mergeSort(int[] data, int[] temp, int l, int r) { .G|U#%"6x
int i, j, k; o^u}(wZ{
int mid = (l + r) / 2; 4hUUQ;xj
if (l == r) Nl{on"il
return; mHNqzdaa
if ((mid - l) >= THRESHOLD) )F6p+i="
mergeSort(data, temp, l, mid); C6d#+
else ZV[-$
insertSort(data, l, mid - l + 1); r1sA^2g.
if ((r - mid) > THRESHOLD) t_qX7P8+'
mergeSort(data, temp, mid + 1, r); ##U/Wa3
else y <P1VES
insertSort(data, mid + 1, r - mid); `Vh&XH\S
w^S]HzMd
for (i = l; i <= mid; i++) { ,MD>Jx|
temp = data; 2-:`lrVd
} Bhe0z|&
for (j = 1; j <= r - mid; j++) { B:)vPO+ d
temp[r - j + 1] = data[j + mid]; %3q7i`AZ
} RR>G}u9np
int a = temp[l]; M,SIs 3
int b = temp[r]; ^!SwY_>
for (i = l, j = r, k = l; k <= r; k++) { qx}*L'xB
if (a < b) { oSP^ .BJ$
data[k] = temp[i++]; ?q"9ZYX<
a = temp; KzB9 mMrO
} else { bbWW|PtWwP
data[k] = temp[j--]; W}k)5<C4v
b = temp[j]; 1["IT.,f.
} 'he&h4fm
} x!UGLL]_M
} &tw{d DD6
dVBr-+
/** /-g%IeF
* @param data ;AT~?o`n
* @param l ts=+k/Z
* @param i K?V' ?s
*/ M'$?Jp#]}
private void insertSort(int[] data, int start, int len) { wVUm!Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XMpE|M!c
} QB7^8O!<
} h'A #Yp0,
} WQHlf0]
} m_UzmWF
&-|(q!jm
堆排序： a6g+"EcH#'
(M%ZSF V
package org.rut.util.algorithm.support; +VHoYEW
`~LaiN.
import org.rut.util.algorithm.SortUtil; QC+BEN$
58Z,(4:E
/** _i0,?U2C
* @author treeroot s?&UFyYb,
* @since 2006-2-2 <2PO3w?Z
* @version 1.0 `R:HMO[ow
*/ 9Oc(Gl5az
public class HeapSort implements SortUtil.Sort{ -[7S.
h>n<5{zqM
/* (non-Javadoc) xQ8?"K;iX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "C]_pWk
*/ _^Q =n>G
public void sort(int[] data) { 1$uO%
MaxHeap h=new MaxHeap(); 9K#U<Q0b'
h.init(data); Yn-;+ 4 K
for(int i=0;i h.remove(); .p\<niu7
System.arraycopy(h.queue,1,data,0,data.length); C-VkXk
} }_cX" s
.T7S1C $HP
private static class MaxHeap{ wTVd){q`.
+p &$`(
void init(int[] data){ {IQCA-AI
this.queue=new int[data.length+1]; WSV% Oy3V
for(int i=0;i queue[++size]=data; ~`VD}{[,B
fixUp(size); =%d0MZD
} W sDFui
} Ndqhc
W$u/tRF
private int size=0; 3?yq*uE}
.KE2sodq
private int[] queue; {i:Ayhq~&
EN~ha:9
public int get() { EP]OJ$6I
return queue[1]; l1}HJmom
} 2(NN QU@Uz
O`='8'6zW\
public void remove() { c|~f[
SortUtil.swap(queue,1,size--); YN5p@b=FX
fixDown(1); __,}/|K2
} @m ?&7{y#?
file://fixdown O:te;lQK
private void fixDown(int k) { Xq.GvZS`
int j; A*+KlhT
while ((j = k << 1) <= size) { 8J+:5b_?
if (j < size %26amp;%26amp; queue[j] j++; 9rQw~B<S
if (queue[k]>queue[j]) file://不用交换 ^+Stvj:N
break; t+O7dZt%r
SortUtil.swap(queue,j,k); sqk$q pV6
k = j; ,2^zX]dgM
} 1$rrfg
} 7Dwf0Re`
private void fixUp(int k) { jxA*Gg3cT5
while (k > 1) { c^BeT;
int j = k >> 1; DX@*lM
if (queue[j]>queue[k]) EyPF'|Qtn
break; Z<6Fq*I
SortUtil.swap(queue,j,k); p+|(lrYC
k = j; jRo4+8
} xouy|Nn'
} <LOas$
9/R<,
} }TAHVcX*p
naWW i]9
} zrCQEQq
9_\1cSk'
SortUtil： >&2n\HR\
%^66(n)
package org.rut.util.algorithm; WG.J-2#3
{,b:f
import org.rut.util.algorithm.support.BubbleSort; ;l2pdP4jf
import org.rut.util.algorithm.support.HeapSort; pbb6?R,
import org.rut.util.algorithm.support.ImprovedMergeSort; 'Gds?o8
import org.rut.util.algorithm.support.ImprovedQuickSort; \H$j["3
import org.rut.util.algorithm.support.InsertSort; %4HpTx
import org.rut.util.algorithm.support.MergeSort; V/i7Zh#2:
import org.rut.util.algorithm.support.QuickSort; !Typ_Cs
import org.rut.util.algorithm.support.SelectionSort; vaUUesytt
import org.rut.util.algorithm.support.ShellSort; ]{'lV~fc
E7UYJ)6]
/** Qg4g(0E@
* @author treeroot @+ U++
* @since 2006-2-2 :6X?EbXhK
* @version 1.0 L BP|
*/ 0'.7dzz
public class SortUtil { YkbZ 2J*-
public final static int INSERT = 1; \%011I4
public final static int BUBBLE = 2; S)[$F}
public final static int SELECTION = 3; tcU4$%H/
public final static int SHELL = 4; Af_yb`W?
public final static int QUICK = 5; A/{0J\pA
public final static int IMPROVED_QUICK = 6; dk4|*l-
public final static int MERGE = 7; h2]gA_T`
public final static int IMPROVED_MERGE = 8; dJwE/s
public final static int HEAP = 9; ![#>{Q4i
Rt10:9Kz$
public static void sort(int[] data) { 3"J85V%h]n
sort(data, IMPROVED_QUICK); l\{{iAC]I
} u4p){|x7s
private static String[] name={ v22ZwP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p[lciWEW
}; V57tn6>b
QUU'/e2^c
private static Sort[] impl=new Sort[]{ &lYe
new InsertSort(), *wetPt)~v_
new BubbleSort(), j9Y'HU5"
new SelectionSort(), &DgJu.
new ShellSort(), qCaM]Y
new QuickSort(), kan4P@XVS
new ImprovedQuickSort(), m6=Jp<
new MergeSort(), =ADdfuKN
new ImprovedMergeSort(), ;+h-o
new HeapSort() ' ;PHuMY#X
}; 3m9ab"
)dgooq
public static String toString(int algorithm){ -^%YrWgd?
return name[algorithm-1]; $"G=r(MW
} EZvf\s>LT
qkbxa?&X
public static void sort(int[] data, int algorithm) { ;3H#8x-
impl[algorithm-1].sort(data); *nh.&Mv|
} 2gnmk TyF
^sA"&Vdr^
public static interface Sort { ,S7g=(27(
public void sort(int[] data); KDzTe9
} YZH&KGY
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public static void swap(int[] data, int i, int j) { 0cBk/x^s
int temp = data; X}s}E ;v9
data = data[j]; Y +9OP
data[j] = temp; j\S}TaH0e
} };=44E'7
} CnA0^JX