[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; [G2@[CtY1
} rF:C({y
int i1=l; z(2pl}
int i2=mid+1; <+UEM~)
for(int cur=l;cur<=r;cur++){ qd#?8
if(i1==mid+1) qp_lMz
data[cur]=temp[i2++]; .gTla
else if(i2>r) kcKcIn{
data[cur]=temp[i1++]; \"Z^{Y[,;
else if(temp[i1] data[cur]=temp[i1++]; &<6E*qM
else *,<A[XP
data[cur]=temp[i2++]; vdw5T&Q{{C
} z<aBGG
} D/)wg$MI
l+!!S"=8)~
} KBJw7rra
&5puGnTZ
改进后的归并排序: [P.M>"c\
wBZ=IMDu\
package org.rut.util.algorithm.support; k#Qav1_
>QO^h<.>
import org.rut.util.algorithm.SortUtil; )3#gpM
+\g/KbV7
/** X{4jyi-<
* @author treeroot /a.4atb0
* @since 2006-2-2 |f), dC
* @version 1.0 |U{9Yy6p
*/ |{W4JFKJ
public class ImprovedMergeSort implements SortUtil.Sort { ly"Jl8/<
pgbm2mT9
private static final int THRESHOLD = 10; 0$)s? \
EdFCaW}""
/* >KHR;W03
* (non-Javadoc) 0/K?'&$yvb
* u3 k%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <knf^D<"
*/ $/;D8P5/&=
public void sort(int[] data) { 0WT]fY?IS
int[] temp=new int[data.length]; a(AKVk\
mergeSort(data,temp,0,data.length-1); ]D?//
} ta"uxL\gge
J1OZG6|e
private void mergeSort(int[] data, int[] temp, int l, int r) { G8=2=/ !
int i, j, k; e??tp]PLn
int mid = (l + r) / 2; ~C[p}MED
if (l == r) m>yb}+
return; },58B
if ((mid - l) >= THRESHOLD) -e<d//>
mergeSort(data, temp, l, mid); k(LZ,WSR
else HJ#3wk"W
insertSort(data, l, mid - l + 1); ,/0Q($oz
if ((r - mid) > THRESHOLD) $A~UA
mergeSort(data, temp, mid + 1, r); zVN/|[KP4
else GL;@heP
insertSort(data, mid + 1, r - mid); y/=:F=H@w
Gk_%WY*
for (i = l; i <= mid; i++) { 58xaVOhb
temp = data; O/g|E47
} p3tu_If
for (j = 1; j <= r - mid; j++) { DV+M;rs
temp[r - j + 1] = data[j + mid]; ?bFP'.
} k1tJ$}
int a = temp[l]; X&C&DTB
int b = temp[r]; j("$qpv
for (i = l, j = r, k = l; k <= r; k++) { vJZ0G:1
if (a < b) { 8vQGpIa,
data[k] = temp[i++]; \H<gKZquR
a = temp; >,c$e' h
} else { -7MR2)U
data[k] = temp[j--]; wEju`0#;
b = temp[j]; O-m=<Fk> D
} -& Qm"-?:
} t^_0w[
} V{!fag
#yNSQd
/** Br/qOO:n$}
* @param data u.v 5!G
* @param l _N8Tu~lqV
* @param i *R9s0;&:
*/ be&5vl
private void insertSort(int[] data, int start, int len) { L8OW@)|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6Gt~tlt:L
} 9%fd\o@X
} oCtg{*vp
} )ph**g
} L1J \C
/V'^$enK!}
堆排序： U@t"o3E
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package org.rut.util.algorithm.support; /|7@rH([{
tW<i;2 l
import org.rut.util.algorithm.SortUtil; 2n]UNC
}YV,uJH[
/** !`kX</ha.
* @author treeroot 7# >;iGuz
* @since 2006-2-2 %v}SJEXFp
* @version 1.0 ggluQGA
*/ 2_S%vA<L
public class HeapSort implements SortUtil.Sort{ 2MT_5j5[N
lT.Q)(
/* (non-Javadoc) x"g-okLN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BdWRm=
*/ sk'<K5~
public void sort(int[] data) { m7<HK,d
MaxHeap h=new MaxHeap(); dA,irb I0W
h.init(data); %>,B1nt
for(int i=0;i h.remove(); F; upb5
System.arraycopy(h.queue,1,data,0,data.length); zzlqj){F
} jbQ N<`!
XKp$v']u
private static class MaxHeap{ E`E$ }iLs
s|40v@M
void init(int[] data){ |W't-}yf
this.queue=new int[data.length+1]; }iGpuoXT`
for(int i=0;i queue[++size]=data; @|I:A
fixUp(size); R$>]7-N}
} @ P:b\WCI
} 0[A4k:
{;:QY1QT
private int size=0; 48}L!m @
cb36~{
private int[] queue; P:~Xaz\F
XOOWrK7O
public int get() { NxOiT#YH
return queue[1]; M.DU^-7
} J#k3iE}
'(ZJsw
public void remove() { Mn)>G36(
SortUtil.swap(queue,1,size--); Oup5LH!sW
fixDown(1); p#14
} 8PN/*Sa
file://fixdown 0P MF)';R
private void fixDown(int k) { "zN2+X"&
int j; :ik$@5wp
while ((j = k << 1) <= size) { L#
if (j < size %26amp;%26amp; queue[j] j++; yQP!Vt^
if (queue[k]>queue[j]) file://不用交换 `/|S.a#g
break; 7!-3jU@m
SortUtil.swap(queue,j,k); %:jVx
k = j; 2X];zY
} 2/*F}w/
} #9R[%R7Nz
private void fixUp(int k) { I JPpF`
while (k > 1) { o0yyP,?yh
int j = k >> 1; v~l_6V}
if (queue[j]>queue[k]) * ':LBc=%
break; *.'9eC0s
SortUtil.swap(queue,j,k); F'v3caE
k = j; A~2U9f+\
} t>f61<27eB
} FWi c/7
g&79?h4UXQ
} q5Bj0r[/o
,5Vc
} >rbHpLm1`
8Ce|Q8<8]
SortUtil： y15 MWZ
$`KddW0_
package org.rut.util.algorithm; KC"#
%1Ex{H hb
import org.rut.util.algorithm.support.BubbleSort; L&gC
import org.rut.util.algorithm.support.HeapSort; NZu\ Ae
import org.rut.util.algorithm.support.ImprovedMergeSort; s!lLdR[g
import org.rut.util.algorithm.support.ImprovedQuickSort; %NyV2W=~X
import org.rut.util.algorithm.support.InsertSort; 3CKd[=-Z
import org.rut.util.algorithm.support.MergeSort; d65fkz==A)
import org.rut.util.algorithm.support.QuickSort; S_Tv Ix/7&
import org.rut.util.algorithm.support.SelectionSort; X2RM*y|
import org.rut.util.algorithm.support.ShellSort; /0S2Omh
<>|&%gmz
/** DGs=.U-=e
* @author treeroot {S9't;%]
* @since 2006-2-2 WFGcR9mN?
* @version 1.0 ">8]Oi;g
*/ /J0YF
public class SortUtil { i8h(b2odQ
public final static int INSERT = 1; r>>4)<C7J
public final static int BUBBLE = 2; U~;Rzoe)q*
public final static int SELECTION = 3; 0Q>yv;M
public final static int SHELL = 4; 2H,^i,
public final static int QUICK = 5; sIVVF#0}]
public final static int IMPROVED_QUICK = 6; Q140b;Z
public final static int MERGE = 7; z~O#0Q!
public final static int IMPROVED_MERGE = 8; v?s]up @@h
public final static int HEAP = 9; BLepCF38
8+7n"6GY2/
public static void sort(int[] data) { Q3@MRR^tY
sort(data, IMPROVED_QUICK); X0QY:?
} wgN)*dpuI
private static String[] name={ P#8+GN+bF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aEO``W
}; 4R c_C0O
3?}\Hw
private static Sort[] impl=new Sort[]{ ;^[VqFpeS
new InsertSort(), UQ7E7yY#
new BubbleSort(), vb&1 S
new SelectionSort(), =XRTeIZ
new ShellSort(), TO,XN\{y
new QuickSort(), o@6hlLr
new ImprovedQuickSort(), gv6}GE
new MergeSort(), Zb \E!>V
new ImprovedMergeSort(), IIZu&iZo\
new HeapSort() wsfN \6e
}; |9fvj6?Y
t PJW|wo
public static String toString(int algorithm){ H3}eFl=i2
return name[algorithm-1]; hJ)\Vo
} 7EfLd+
=6sA49~M
public static void sort(int[] data, int algorithm) { +i\ +bR
impl[algorithm-1].sort(data); A`#/:O4|f
} 7Gos-_s
>V01%fLd
public static interface Sort { I^u$H&
public void sort(int[] data); ~ z< &vQ=
} #`g..3ey
E$4_.Z8sRw
public static void swap(int[] data, int i, int j) { |vGb,&3
int temp = data; (Yv)%2
data = data[j]; "X[sW%# F
data[j] = temp; Dc1tND$X3g
} MV(Sb:RZ
} FX->_}kL=