[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; [?A&xqO3
} [TP
int i1=l; Pb0)HlLq
int i2=mid+1; tp7oc_s?.
for(int cur=l;cur<=r;cur++){ tsck|;v
if(i1==mid+1) aXQ&@BZ{j
data[cur]=temp[i2++]; AbL5 !'
else if(i2>r) w8G7Jy
data[cur]=temp[i1++]; /g13X,.H
else if(temp[i1] data[cur]=temp[i1++]; n'q aR<bY
else $I\))*a
data[cur]=temp[i2++]; d:A\<F
} +d.u##$
} _L8Mpx*E
C(f$!~M4b
} _c[|@D
3xRM 1GgO
改进后的归并排序: n/xXQ7y
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package org.rut.util.algorithm.support; KrJ5"1=
#c6ui0E%;t
import org.rut.util.algorithm.SortUtil; ~azF+}x90N
43+EX.c
/** f#*h^91x
* @author treeroot f;e_04K
* @since 2006-2-2 :x8Jy4L
* @version 1.0 =g/4{IL%
*/ :8](&B68gE
public class ImprovedMergeSort implements SortUtil.Sort { @m5O{[euj<
(}9cD^F0n
private static final int THRESHOLD = 10; $$k7_rs
r5D jCV"
/* <9=zP/Q
* (non-Javadoc) X'YfjbGo
* qsD?dHi7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !>CE(;E>z
*/ V+Y|4Y&
public void sort(int[] data) { R 4DM_u
int[] temp=new int[data.length]; XPar_8I
mergeSort(data,temp,0,data.length-1); d^ 2u}^kG
} s>LA3kT
fx]\)0n
private void mergeSort(int[] data, int[] temp, int l, int r) { ~C%2t{"
int i, j, k; f+*J ue
int mid = (l + r) / 2; Rbx97(wK
if (l == r) QIR4<]/
return; d-9uv|SJ
if ((mid - l) >= THRESHOLD) kEp.0wL'
mergeSort(data, temp, l, mid); X(4s;i
else <]Ij(+J;
insertSort(data, l, mid - l + 1); FgXu1-
if ((r - mid) > THRESHOLD) 29&sydu
mergeSort(data, temp, mid + 1, r); ^wvH,>Yo
else t.3Ct@wK
insertSort(data, mid + 1, r - mid); s]$HkSH
lo\:]/&6
for (i = l; i <= mid; i++) { 6\; 4 4,3
temp = data; ;M%oQ>].[
} u)<Ysx8G
for (j = 1; j <= r - mid; j++) { N!tpzHXw
temp[r - j + 1] = data[j + mid]; jjJc1p0
} $KoPGgC[
int a = temp[l]; lc\>DH\n6
int b = temp[r]; ;n%]*v
for (i = l, j = r, k = l; k <= r; k++) { TX<e_[$\
if (a < b) { 6H(fk1E
data[k] = temp[i++]; G> f^2
a = temp; CnxK+1n l
} else { 3$GY,B
data[k] = temp[j--]; _<u8%\
b = temp[j]; vpZu.#5c
} 1"8Z y6t
} F?*Dr
} h$E\2lsE
aK8bKlZe
/** Mfnlue](
* @param data OpWeW
* @param l J xA^DH
* @param i #pS]k<o%1
*/ cpE25
private void insertSort(int[] data, int start, int len) { \(.nPW]9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CQ@#::'F1
} vGx?m@
} #G'S ve?
} _myg._[
} 4yA9Ni
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堆排序： tebWj>+1c
bYwI==3
package org.rut.util.algorithm.support; g*:ae;GP
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import org.rut.util.algorithm.SortUtil; Wl^prs7}c
oUW)H
/** nz,Mqol
* @author treeroot Ss"|1]acP
* @since 2006-2-2 8>C; >v
* @version 1.0 .b=M5JsyV
*/ :FX'[7;p
public class HeapSort implements SortUtil.Sort{ ga4/,
MgJ%26TZ
/* (non-Javadoc) 3a'Rs{qxn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v#Cz&j
*/ W0+gfg
public void sort(int[] data) { =]_d pEEQ
MaxHeap h=new MaxHeap(); mQwk!* U
h.init(data); t9Enk!@
for(int i=0;i h.remove(); *r)zBr
System.arraycopy(h.queue,1,data,0,data.length); 21[K[ %
} \_*?R,$3Y,
X_lUD?y
private static class MaxHeap{ /|4Q9=
dWzDSlP&
void init(int[] data){ R&u)=~O\5
this.queue=new int[data.length+1]; {AU` }*5
for(int i=0;i queue[++size]=data; c,v^A+sZu
fixUp(size); ]jVIpGM
} KKx&UKjV
} SR&(HH$
#~bU}[{
private int size=0; Zu2m%=J`
9IS1.3
private int[] queue; @{J!6YGh
N.fQ7z=Z(M
public int get() { "e1{V8 4
return queue[1]; hj^G}4
} jRv;D#Hp
?~VWW<lR
public void remove() { -Z`(? k
SortUtil.swap(queue,1,size--); 6=Y3(#Ddt
fixDown(1); c]AKeq]
} mhHA!:Y
file://fixdown rd&*j^?
private void fixDown(int k) { 8{}Pj
int j; U~u6}s]:
while ((j = k << 1) <= size) { dCf'\@<<
if (j < size %26amp;%26amp; queue[j] j++; Bo](n*i
if (queue[k]>queue[j]) file://不用交换 p`E|SNt/W
break; f"5lOzj`C
SortUtil.swap(queue,j,k); &y#\1K
k = j; ^]#Ptoz^(l
} [OFTP#}c
} Pi&fwGL
private void fixUp(int k) { B|]t\(~$[
while (k > 1) { ,(@Y%UW:
int j = k >> 1; Dg9--wI}I9
if (queue[j]>queue[k]) ;ZxK3/(7
break; pz*/4
SortUtil.swap(queue,j,k); M-&^
k = j; ?J^IAFy
} }$&T O$LX
} mr{k>Un\
%:'1_@Ot2
} @!L@UP0
bl:a&<F
} ~cO?S2!W
9}%~w(P
SortUtil： |kBg8).B
r)9i1rI+
package org.rut.util.algorithm; )[y!m9Vn
)H[h53bIq
import org.rut.util.algorithm.support.BubbleSort; 5@R15q@c6n
import org.rut.util.algorithm.support.HeapSort; ~_dBND?
import org.rut.util.algorithm.support.ImprovedMergeSort; N[+o[%A
import org.rut.util.algorithm.support.ImprovedQuickSort; A:8FJ3'
import org.rut.util.algorithm.support.InsertSort; d+YVyw.z
import org.rut.util.algorithm.support.MergeSort; Q8}TNJsU
import org.rut.util.algorithm.support.QuickSort; \jF" nl
import org.rut.util.algorithm.support.SelectionSort; 1}n)J6m
import org.rut.util.algorithm.support.ShellSort; %T&&x2p^=?
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/** IEIxjek
* @author treeroot P\*2c*,W;
* @since 2006-2-2 4 BE:&A
* @version 1.0 ]zhq.O >2{
*/ V:,3OLL*
public class SortUtil { . T6_N
public final static int INSERT = 1; F'?5V0\he
public final static int BUBBLE = 2; =\Tud-1Z
public final static int SELECTION = 3; W[[YOK1T
public final static int SHELL = 4; l(krUv
public final static int QUICK = 5; 0M/\bEG(_
public final static int IMPROVED_QUICK = 6; +hgaBJy
public final static int MERGE = 7; ?FY@fO?es
public final static int IMPROVED_MERGE = 8; bOdsMlJkN
public final static int HEAP = 9; 3IU$
dFI.`pB
public static void sort(int[] data) { &|'Kut?8
sort(data, IMPROVED_QUICK); O9qKwn;q(
} <M=W)2D7
private static String[] name={ zal3j^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DMK"Q#Vw
}; Fu1|b2B-x
XqE55Jclp
private static Sort[] impl=new Sort[]{ lk+=26>
new InsertSort(), Yn[EI7D
new BubbleSort(), iP#A-du
new SelectionSort(), i)`zKbK
new ShellSort(), *mK);@pL
new QuickSort(), xyz\;3
new ImprovedQuickSort(), lvz:UWo
new MergeSort(), 72s$
new ImprovedMergeSort(), %Zl_{Q]h
new HeapSort() %b>y
}; U"%8"G0)
-pU\"$nuxH
public static String toString(int algorithm){ 0-t4+T
return name[algorithm-1]; GH; F3s
} O'&X aaZV
fdCxMKlu;
public static void sort(int[] data, int algorithm) { g`~lIt[=
impl[algorithm-1].sort(data); mISuo
} rvoS52XG,
W(PW9J9
public static interface Sort { &>) `P[x
public void sort(int[] data); <4!&iU+;
} R^u^y{ohr
sxC{\iLY%
public static void swap(int[] data, int i, int j) { S{"6PXzb
int temp = data; @|\s$L
data = data[j]; gE6y&a
data[j] = temp; *NwKD:o
} (W}i287
} !+*?pq