[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; 9fR`un)f}
} 1+6)0 OH{
int i1=l; 3}{od$3G
int i2=mid+1; !C>}j* 4
for(int cur=l;cur<=r;cur++){ 8/cD7O
if(i1==mid+1) :db:|=#T
data[cur]=temp[i2++]; k@r%>Ul@
else if(i2>r) m3zmyw}
data[cur]=temp[i1++]; CC,_I>t
else if(temp[i1] data[cur]=temp[i1++]; kd^CZ;O
else IfF@$eO
data[cur]=temp[i2++]; *|S.[i_7
} `!{m#BBT}
} K~Lh'6
R5=2EwrGP
} A?I/[zkc
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改进后的归并排序: 5*QNE!
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package org.rut.util.algorithm.support; RB7?T5G
92g#QZs&W
import org.rut.util.algorithm.SortUtil; nRq@hk
/y/O&`X(
/** .|x\6 jf
* @author treeroot mD@#,B7A
* @since 2006-2-2 F&?&8.
* @version 1.0 Hbz>D5$
*/ ^gx`@^su
public class ImprovedMergeSort implements SortUtil.Sort { 8nn%wps
.*+?]
private static final int THRESHOLD = 10; 9Qja|;
f S-(Kmh
/* >D20f<w(H
* (non-Javadoc) $|~YXH~O
* T;/Y/Fd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?`R;ZT)U-
*/ LJ7Qwh_",
public void sort(int[] data) { <n+?7`d,
int[] temp=new int[data.length]; )Zx;Z[
mergeSort(data,temp,0,data.length-1); #P[d?pY
} O_@
*h59Vaoc
private void mergeSort(int[] data, int[] temp, int l, int r) { et[n;nl>V
int i, j, k; 6`(x)Q9
int mid = (l + r) / 2; w6ZyMR,T
if (l == r) := OdjfhY
return; &~`Ay4hq
if ((mid - l) >= THRESHOLD) V2-fJ!
mergeSort(data, temp, l, mid); _?]E)i'RI
else w7d(|`
insertSort(data, l, mid - l + 1); &|rh~;:jUX
if ((r - mid) > THRESHOLD) *7MTq_K(An
mergeSort(data, temp, mid + 1, r); -58
else Wp!#OY1?
insertSort(data, mid + 1, r - mid); xD[O8vQE
ux-puG
for (i = l; i <= mid; i++) { 78'HE(*
temp = data; w@ 1g_dy
} C>\0 "}iD
for (j = 1; j <= r - mid; j++) { h>>KH*dQ
temp[r - j + 1] = data[j + mid]; " sh%8 <N
} 9X<o8^V
int a = temp[l]; Z!\xVCG"q
int b = temp[r]; 8}9B*m
for (i = l, j = r, k = l; k <= r; k++) { &fH;A X.
if (a < b) { ;2lKo="
data[k] = temp[i++]; 'F3cvpc`
a = temp; D vG9(Eh
} else { C:Tjue{G2
data[k] = temp[j--]; )*!"6d)^
b = temp[j]; J=QuZwt
} 2M`]nAk2a
} ?LE\pk R
} %6-5hBzZN
b5r.N1ms
/** !V|%n(O"
* @param data v X=zqV
* @param l 6:Eu[PE~w
* @param i Aj|Gqw>
*/ e)Q{yO
private void insertSort(int[] data, int start, int len) { C*O648yz[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /]pBcb|<
} .Pz( 0Y
} x\/N09
} 3]Jl\<0
} VXr'Z
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堆排序： =b\k$WQ_(
}6YD5?4
package org.rut.util.algorithm.support; a~#MMl
ci]IH]x
import org.rut.util.algorithm.SortUtil; 6$42-a%b
~nul[>z
/** ?9jl8r>
* @author treeroot H"~]|@g-p
* @since 2006-2-2 BK,h$z7#6
* @version 1.0 XQI.z7F
*/ lHg&|S&J
public class HeapSort implements SortUtil.Sort{ H)#HK!F6f
Ml)0z&jQX
/* (non-Javadoc) iR k.t=B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \?n4d#=$o
*/ -Fi{[%&u
public void sort(int[] data) { _FV<[x,nE8
MaxHeap h=new MaxHeap(); )`Zj:^bz9
h.init(data); Jxyeh1zqB
for(int i=0;i h.remove(); w QV4[
System.arraycopy(h.queue,1,data,0,data.length); 0}(ZW~&1
} @|yRo8|
']'H8Y-M
private static class MaxHeap{ }o>6 y>=
zGm#erE
void init(int[] data){ kzZdYiC
this.queue=new int[data.length+1]; N*d )<8_
for(int i=0;i queue[++size]=data; D%PrwfR
fixUp(size); r&^LSTU0!
} &c;@u?:@S
} 3$cIm+
CYIp 3D'k
private int size=0; uU_0t;oR3
l| /tKW
private int[] queue; y^M~zOe
-68E]O
public int get() { < 0S+[7S"
return queue[1]; jt({@;sU[<
} q(tdBd'o6
?_!} lg
public void remove() { ";&5@H|
SortUtil.swap(queue,1,size--); }AZ0BI,TI
fixDown(1); aMxg6\8
} Q1?0R<jOU
file://fixdown ~.FZF
private void fixDown(int k) { e)Be*J]4
int j; 4FWb5b!A=
while ((j = k << 1) <= size) { XJs*DK
if (j < size %26amp;%26amp; queue[j] j++; \5MW65
if (queue[k]>queue[j]) file://不用交换 =lE_ Q[P
break; vw;GbQH(
SortUtil.swap(queue,j,k); xcF:moL
k = j; 3kAhvL
} E*uz|w3S)Y
} E&}@P0^
private void fixUp(int k) { #LGAvFA*_F
while (k > 1) { 3XCePA5z
int j = k >> 1; (zVT{!z
if (queue[j]>queue[k]) v*Fr#I0U
break; * mzJ)4A
SortUtil.swap(queue,j,k); v(=?ge YLo
k = j; zNu>25/)(
} 0#gu7n|J
} KfSI6 Y_
,-C%+SC
} y@5{.jsr_
3rF=u:r7c
} !,}F2z?4c
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SortUtil： *gq~~(jH
Z'vic#
package org.rut.util.algorithm; O>5xFz'm
PD-<D~7
import org.rut.util.algorithm.support.BubbleSort; tSP)'N<
import org.rut.util.algorithm.support.HeapSort; <6 LpsM}
import org.rut.util.algorithm.support.ImprovedMergeSort; XIgGE)n
import org.rut.util.algorithm.support.ImprovedQuickSort; 0Y%u[i/
import org.rut.util.algorithm.support.InsertSort; r34q9NFT5
import org.rut.util.algorithm.support.MergeSort; )2Ru} -H
import org.rut.util.algorithm.support.QuickSort; N^)\+*tf1
import org.rut.util.algorithm.support.SelectionSort; d)_fI*:f
import org.rut.util.algorithm.support.ShellSort; m0: IFE($
QoGvjf3z
/** W[+=_B
* @author treeroot |>/T*zk<
* @since 2006-2-2 1ZUmMa1(
* @version 1.0 Rl. YF+YH
*/ *A2D}X3s
public class SortUtil { (1tb
public final static int INSERT = 1; -HE@wda
public final static int BUBBLE = 2; ^ #6Ei9di
public final static int SELECTION = 3; d".Xp4}f
public final static int SHELL = 4; -3z$~ {
public final static int QUICK = 5; ,)S(SnCF
public final static int IMPROVED_QUICK = 6; Kx-s95t
public final static int MERGE = 7; C EzTErn
public final static int IMPROVED_MERGE = 8; #J=@} S)
public final static int HEAP = 9; 8PR1RCJ
7Fg-}lJAC
public static void sort(int[] data) { :o)4Y
sort(data, IMPROVED_QUICK); l,I[r$TCf
} _iJ8*v8A
private static String[] name={ jD`p;#~8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kp{q5J6/
}; )A@i2I
8Pkw'.r
private static Sort[] impl=new Sort[]{ O&]P u5
new InsertSort(), ,?'":T1[
new BubbleSort(), cZ<@1I5QK
new SelectionSort(), D2060ze
new ShellSort(), 9r5<A!1#L
new QuickSort(), ]*M VVzF
new ImprovedQuickSort(), f _ O
new MergeSort(), *0*1.>Vg
new ImprovedMergeSort(), CDNh9`
new HeapSort() "_g3{[es!
}; e\9H'$1\
UBgheu
public static String toString(int algorithm){ Xy0KZ !
return name[algorithm-1]; ZwC\n(_y
} |#87|XIJ&~
aUqVcEU1
public static void sort(int[] data, int algorithm) { \Y>!vh X
impl[algorithm-1].sort(data); 'Q^P#<<
} 6r|BiHP
=GP~h*5es
public static interface Sort { &fyT}MA
public void sort(int[] data); xE[CNJ%t^,
} @(~m.p|
eSC69mfD
public static void swap(int[] data, int i, int j) { p+t79F.js
int temp = data; ggy 7p44
data = data[j]; `T-lBwH
data[j] = temp; ,h#U<CnP#
} 7%%FYHMO:
} "K!9^!4&