[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; kx:c*3q.k
} S_a :ML<
int i1=l; 8moUK3w
int i2=mid+1; ?0? x+
for(int cur=l;cur<=r;cur++){ 7ZL,p:f
if(i1==mid+1) !Jk(&.
data[cur]=temp[i2++]; MiRibHXI,
else if(i2>r) nZ"{y
data[cur]=temp[i1++]; y?[5jL|Ue
else if(temp[i1] data[cur]=temp[i1++]; pM1=UF
else od;Bb
data[cur]=temp[i2++]; d&O'r[S
} #($k 3OA
} oXnC"y}0P
dl7Riw-J
} (N)r#"FV
:y4)qF
改进后的归并排序: <)r,CiS
0*/mc96
package org.rut.util.algorithm.support; (xI)"{
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import org.rut.util.algorithm.SortUtil; ,R7=]~<io"
xC= y^- 1
/** 45]Ym{]
* @author treeroot ;D%$Eh&oma
* @since 2006-2-2 WZfk}To1#
* @version 1.0 yBpW#1=
*/ dt`9RB$
public class ImprovedMergeSort implements SortUtil.Sort { QCZ,K"y
Ukk-(gjX
private static final int THRESHOLD = 10; 0IoXDx
:DS2zA
/* o[5=S,'
* (non-Javadoc) ujI 3tsl
* "Nk=g~|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .WN;TjEg!
*/ X ,V= od>
public void sort(int[] data) { q/W{PBb-2k
int[] temp=new int[data.length]; g=8|z#S
mergeSort(data,temp,0,data.length-1); 9,Crmbw8
} 'sT}DX(7M
7Va#{Y;Zy
private void mergeSort(int[] data, int[] temp, int l, int r) { 3B!&ow<rt
int i, j, k; N}.Q%&6:
int mid = (l + r) / 2; sRo<4U0M;l
if (l == r) ];d5X
return; i_oro"%yL
if ((mid - l) >= THRESHOLD) ;-Y]X(z>
mergeSort(data, temp, l, mid); mh!N^[=n
else g:~?U*f-
insertSort(data, l, mid - l + 1); /iuUUCk
if ((r - mid) > THRESHOLD) 3iwoMrp
mergeSort(data, temp, mid + 1, r); "w:\@Jwu(
else |k['wqn"
insertSort(data, mid + 1, r - mid); YoSo0fQA
}`+^|1
for (i = l; i <= mid; i++) { Ee$"O6*!
temp = data; 9TbS>o
} :FKYYH\
for (j = 1; j <= r - mid; j++) { thlpj*|
temp[r - j + 1] = data[j + mid]; teQaHe#
} .g(\B
int a = temp[l]; Pq[0vZ_}dN
int b = temp[r]; NIWI6qCw
for (i = l, j = r, k = l; k <= r; k++) { ]ut-wqb{p
if (a < b) { @4 Os?_gJ\
data[k] = temp[i++]; -N-4l
a = temp; ulz\x2[Pf
} else { clR?< LO
data[k] = temp[j--]; aOAwezfYR
b = temp[j]; 5CRc]Q#@
} &<fRej]v
} !~w6"%2+7
} ?@g;[310`
PJSDY1T
/** QYf/tQg$
* @param data &4[#_(pk
* @param l ~Uwr689N
* @param i rlUdAa3
*/ K[Egwk7
private void insertSort(int[] data, int start, int len) { buCm @@o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (to/9OrG
} 0$F _hZU
} =Nv=Q mO
} +,{Wcb
} <g/(wSl
H8o%H=I%
堆排序： vxzf[
d<|lLNS
package org.rut.util.algorithm.support; fn?6%q,!ls
TYJnQ2m
import org.rut.util.algorithm.SortUtil; Ls$g-k%c@Q
&[W3e3Asra
/** ELkOrV~a{:
* @author treeroot qqz,~EhC
* @since 2006-2-2 `1[Sv"
* @version 1.0 sJHy=z0m
*/ wk@(CKQzI,
public class HeapSort implements SortUtil.Sort{ gqJEJ~
Cr V2 V)|G
/* (non-Javadoc) ~\@<8@N2a6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^]sMy7X0IK
*/ . ;ea]_Z
public void sort(int[] data) { #by9D&QP]
MaxHeap h=new MaxHeap(); Q 2SSJ
h.init(data); Z,8+@
for(int i=0;i h.remove(); qeK
System.arraycopy(h.queue,1,data,0,data.length); #iqhm,u7D
} C}8e<[})
F)<G]i8n~
private static class MaxHeap{ h2/1S{/n]
hOrk^iYN=
void init(int[] data){ +k(3+b$S-
this.queue=new int[data.length+1]; )R a/
for(int i=0;i queue[++size]=data; RwE*0 T
fixUp(size); Cf1wM:K|8
} SFk11
} `9Q,=D+
}r<@o3t
private int size=0; \Q?|gfJH
M\.T 0M_
private int[] queue; [nPzhXs
FOUs= E[
public int get() { <*(UvOQuX
return queue[1]; oN6*WNtJ
} g%q?2Nv
Qdx`c^4m
public void remove() { X5oW[
SortUtil.swap(queue,1,size--); X^_+%U
fixDown(1); xO9]yULgu
} Z\gg<Q
file://fixdown \,cKt_{ u
private void fixDown(int k) { j@?[vi
int j; M@2Qn-I
while ((j = k << 1) <= size) { RzY`^A6G6
if (j < size %26amp;%26amp; queue[j] j++; NV:XPw/
if (queue[k]>queue[j]) file://不用交换 eS@!\Hx
break; '*LN)E>d
SortUtil.swap(queue,j,k); hZ\W ?r
k = j; U0bEB
} @tv];t
} 8hdAXWPn
private void fixUp(int k) { 5vh"PlK`s
while (k > 1) { ao";5m
int j = k >> 1; O]%m{afM
if (queue[j]>queue[k]) t1{%FJ0F
break; [|;Zxb:
SortUtil.swap(queue,j,k); ':R3._tw\
k = j; k\thEEVP0*
} 8$jT#\_
} `@.s!L(V
+@7x45;D
} &F*QYz[
1PTu3o&3
} ~ GT\RAj[
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SortUtil： Y/ac}q
7pI\`*7b
package org.rut.util.algorithm; F+y`4>x
Lv5 ==w}
import org.rut.util.algorithm.support.BubbleSort; 0qd;'r<
import org.rut.util.algorithm.support.HeapSort; $I6eHjYT
import org.rut.util.algorithm.support.ImprovedMergeSort; io33+/
import org.rut.util.algorithm.support.ImprovedQuickSort; GqD!W8+
import org.rut.util.algorithm.support.InsertSort; =UKR<@QrK
import org.rut.util.algorithm.support.MergeSort; .gkPG'm[
import org.rut.util.algorithm.support.QuickSort; AoOG[to7
import org.rut.util.algorithm.support.SelectionSort; SnF[mN'
import org.rut.util.algorithm.support.ShellSort; _Il9s#NA%
*I1W+W`G
/** e%v4,8
* @author treeroot UV8r&O
* @since 2006-2-2 8W<)c
* @version 1.0 0S5C7df
*/ gWv+i/,
public class SortUtil { 6ewOZ,"j"4
public final static int INSERT = 1; S{)n0/_
public final static int BUBBLE = 2; >]Yha}6h
public final static int SELECTION = 3; 8OtUY}R
public final static int SHELL = 4; WT!\X["FI$
public final static int QUICK = 5; |%cO"d^ri
public final static int IMPROVED_QUICK = 6; #`L}.
public final static int MERGE = 7; &eS70hq
public final static int IMPROVED_MERGE = 8; 6'*Uo:]
public final static int HEAP = 9; |>}0? '/]
WKJL< D ]:
public static void sort(int[] data) { ;pyJ O_R[
sort(data, IMPROVED_QUICK); "oXAIfU#T
} XQY&4tK
private static String[] name={ @]"9EW 0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9-iB?a7{.
}; E!~2\qKT
&b6@_C9
private static Sort[] impl=new Sort[]{ xv%USm
new InsertSort(), iai4$Y(%
new BubbleSort(), u,,WD
new SelectionSort(), Hi" n GH
new ShellSort(), l}-`E@w
new QuickSort(), /Vd#q)b%T
new ImprovedQuickSort(), 1Da [!^u,D
new MergeSort(), 'U{: zBh
new ImprovedMergeSort(), 3jeV4|
new HeapSort() v4##(~Tu
}; n_&)VF#n(
%s :
public static String toString(int algorithm){ A-Pwi.$
return name[algorithm-1]; ;AB,:*
} rJQ|Oi&1i
K/d&c]
public static void sort(int[] data, int algorithm) { ^W[`##,{Od
impl[algorithm-1].sort(data); 4-rI4A<
} <H@!Xw;
E1ob+h:`d
public static interface Sort { _N f[HP
public void sort(int[] data); ;xtb2c8HT
} BCZnF /Zo
PZg]zz=V4
public static void swap(int[] data, int i, int j) { uvv-lAbjw
int temp = data; [%,=0P}
data = data[j]; RkP|_Bf8)
data[j] = temp; $5CY<,f
} 9x^ /kAB
} m:Cx~