[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; q(zJ%Gv)
} %VzKqh
int i1=l; fLSXPvm
int i2=mid+1; @%tRhG
for(int cur=l;cur<=r;cur++){ WVmq% ,7
if(i1==mid+1) ddfs8\
data[cur]=temp[i2++]; u)ev{)$TM
else if(i2>r) )I^2k4Cg"
data[cur]=temp[i1++]; ({-GOw46
else if(temp[i1] data[cur]=temp[i1++]; n6*En7IVh
else !L;\cl
data[cur]=temp[i2++]; P6 ;'Sza
} Di@GY!
} N[<H7_/3
r'dr9"-{
} "p/j; 6H
3' ~gviI
改进后的归并排序: B|C/ Rk6?
+$$$
package org.rut.util.algorithm.support; #'-Sh7ycW
.s<*'B7&
import org.rut.util.algorithm.SortUtil; v1|Bf8
J[A14z]#`
/** eVt$7d?Jw
* @author treeroot @*0cMO;SpG
* @since 2006-2-2 _bzqd" 31I
* @version 1.0 a@@M+9Q
*/ p}|.ZkyN
public class ImprovedMergeSort implements SortUtil.Sort { }w/;){gu
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private static final int THRESHOLD = 10; ) c/% NiN
bn(`O1r[(
/* JXixYwm
* (non-Javadoc) ~`GhS<D
* ik"sq}u_]E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l"q1?kaVg
*/ /erN;Oo%<
public void sort(int[] data) { Dy]I8_
int[] temp=new int[data.length]; >6~k9>nDb<
mergeSort(data,temp,0,data.length-1); ?9HhG?_x
} RP2_l$
hY*0aZ|(
private void mergeSort(int[] data, int[] temp, int l, int r) { 4EXB;[]
int i, j, k; rUlS'L;$"
int mid = (l + r) / 2; KJ?y@Q
if (l == r) mAeuw7Ni
return; .fi/I
if ((mid - l) >= THRESHOLD) CvPioi
mergeSort(data, temp, l, mid); TDg@Tg0
else :qR=>n=
insertSort(data, l, mid - l + 1); ]Ni;w]KE
if ((r - mid) > THRESHOLD) `/"nTB
mergeSort(data, temp, mid + 1, r); RQkyCAGx
else $55U+)C<
insertSort(data, mid + 1, r - mid); X; 5Jb
-UZ@G~K
for (i = l; i <= mid; i++) { ]&ixhW
temp = data; 7QVuc!V
} Uz608u
for (j = 1; j <= r - mid; j++) { X53mzs
temp[r - j + 1] = data[j + mid]; 4"@GNk~e
} x lsqj`=
int a = temp[l]; 4g}FB+[u
int b = temp[r]; ZkP{[^6d\
for (i = l, j = r, k = l; k <= r; k++) { BR v+.(S
if (a < b) { )i>[M"7
data[k] = temp[i++]; &3v&i*DG,I
a = temp; =H %-.m'f2
} else { FG%j{_Ez
data[k] = temp[j--]; 1[E#vdbT
b = temp[j]; 4Hb $0l
} aup6?'G;
} dI*'!wK
} DY{cQb
g7CXlT0Q6
/** W%e_~$H0
* @param data Sf/q2/r?6[
* @param l x|0:P sE
* @param i #5&jt@NS
*/ `_5GG3@Ff
private void insertSort(int[] data, int start, int len) { Z,c,G2D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {kLGWbo|Q
} 659v\51*
} 1/ZR*fa
} 451'>qS
} ?-OPX_i_
=s}Xy_+:
堆排序： joa5|t!D9
9p@C4oen
package org.rut.util.algorithm.support; ?/M_~e.P
m7=1%6FN3
import org.rut.util.algorithm.SortUtil; s$DrR
pi@Xkw
/** fd8!KO
* @author treeroot VW@ x=m
* @since 2006-2-2 |<`.fOxJP
* @version 1.0 Aaw(Ed
*/ bm}6{28R
public class HeapSort implements SortUtil.Sort{ ciMM^ZRIb
D H^T x
/* (non-Javadoc) J$9:jE-4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u/Fj'*M
*/ _2hXa!yO
public void sort(int[] data) { k$Rnj`*^
MaxHeap h=new MaxHeap(); wU`!B<,j
h.init(data); K{cbn1\,H
for(int i=0;i h.remove(); cPn+<M#
System.arraycopy(h.queue,1,data,0,data.length); ,>LRa
} la$%H<,7
[U\(G
private static class MaxHeap{ p"`%
u>.y:>
void init(int[] data){ 0nW F
this.queue=new int[data.length+1]; ~V)?>)T
for(int i=0;i queue[++size]=data; ~S; Z\
fixUp(size); %*z-PT22
} mzD^Y<LTd
} N;HIsOT}t
9.M{M06;
private int size=0; O\OE0[[
},+~F8B
private int[] queue; #T~&]|{,
F9XT lA
public int get() { !:fv>FEI9
return queue[1]; NvtM3
} jN/C'\QL
Nm]% }
public void remove() { uD>z@J-v
SortUtil.swap(queue,1,size--); 2L\3S ukj
fixDown(1); .tF|YP==
} {<w +3Va
file://fixdown BH@b1}
private void fixDown(int k) { UP2.]B!d
int j; N dR ]
while ((j = k << 1) <= size) { r$nkU4N'
if (j < size %26amp;%26amp; queue[j] j++; h3Fo-]0
if (queue[k]>queue[j]) file://不用交换 ?RD *1
break; en9en=n|
SortUtil.swap(queue,j,k); _$/ +D:K
k = j; IS]{}Y\3H
} gbOCR1PBg
} \gccQig1CJ
private void fixUp(int k) { }fIqH4bp
while (k > 1) { ;vO@m!h}U
int j = k >> 1; 6~5$s1Yc
if (queue[j]>queue[k]) ARL
break; `1p 8C%
SortUtil.swap(queue,j,k); tfiqr|z
k = j; $V8vrT#:
} -!*p*3|03|
} M?o{STt
5n:71$6[
} ,EhVSrh)_4
X<MpN5%|Wo
} 6Dm+'y]l
sms1%%~
SortUtil： 8?jxDW a
bY#;E;'7
package org.rut.util.algorithm; _|n=cC4Qu
U6WG?$x
import org.rut.util.algorithm.support.BubbleSort; rS~qi}4X
import org.rut.util.algorithm.support.HeapSort; vC9@,[
import org.rut.util.algorithm.support.ImprovedMergeSort; Q5E:|)G
import org.rut.util.algorithm.support.ImprovedQuickSort; <jd/t19DB
import org.rut.util.algorithm.support.InsertSort; hWGZd~L
import org.rut.util.algorithm.support.MergeSort; gOE_ ]
import org.rut.util.algorithm.support.QuickSort; {y);vHf$
import org.rut.util.algorithm.support.SelectionSort; rveVCTbC
import org.rut.util.algorithm.support.ShellSort; zS% m_,t
Fu0.~w
/** b%0BkS*
* @author treeroot ^!>.97*
* @since 2006-2-2 (5Ky6b9v
* @version 1.0 %{ ~>n"
*/ INLf# N
public class SortUtil { \ sf!
public final static int INSERT = 1; e`DsP8-&v
public final static int BUBBLE = 2; ^!@*P,'I
public final static int SELECTION = 3; O@`J_9
public final static int SHELL = 4; c2b6B.4
public final static int QUICK = 5; _:,.yRez
public final static int IMPROVED_QUICK = 6; w yD%x(
public final static int MERGE = 7; +Hy4s[_|
public final static int IMPROVED_MERGE = 8; xw%)rm<t
public final static int HEAP = 9; GAJ~$AiwHH
P06.1
public static void sort(int[] data) { (Nt[v;BnO
sort(data, IMPROVED_QUICK); D=w9cKa
} 9H$g?';
private static String[] name={ $y6rvQ 2>S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3bH5C3(u
}; 7jezw'\=~
)l2P}k7`
private static Sort[] impl=new Sort[]{ `Yogq)G}
new InsertSort(), -c$z 2Q)
new BubbleSort(), 92(~'5Qr
new SelectionSort(), FrR9{YTA.
new ShellSort(), 0}-#b7eR
new QuickSort(), RdkU2Y}V
new ImprovedQuickSort(), S_T
new MergeSort(), kbq:U8+k
new ImprovedMergeSort(), _SF!T6A
new HeapSort() XWF7#xM
}; Rkr^Z?/GH
1E^{B8cm
public static String toString(int algorithm){ LY1KQuY
return name[algorithm-1]; |M _%QM.
} )=(n/vckM
(+$ol'i
public static void sort(int[] data, int algorithm) { \6c8z/O7
impl[algorithm-1].sort(data); I3ho(Kdi
} ibDMhW$n
r,p6J7/lfS
public static interface Sort { GH%'YY3|
public void sort(int[] data); p/V
} aQax85
7mulNq
public static void swap(int[] data, int i, int j) { qwAN=3@
int temp = data; wn*z*
data = data[j]; 2N]u!S;d
data[j] = temp; W":is"
} .K![<eZ
} yQwj[