[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; ;V]EF
} bUbM}
int i1=l; .CH0PK=l
int i2=mid+1; ;K38I}
for(int cur=l;cur<=r;cur++){ IQ[?ej3W
if(i1==mid+1) ZK<kn8JJ
data[cur]=temp[i2++]; d (]t}
else if(i2>r) un0tzz
data[cur]=temp[i1++]; }Zu2GU$6
else if(temp[i1] data[cur]=temp[i1++]; ]X~;?>#:p
else E15"AO
data[cur]=temp[i2++]; %\PnsnJ9Q
} .QOQqU*2I
} :"? boA#L
(UmoG
} GczGW4\P'
U*F|Z4{W
改进后的归并排序: MN\/F4Io
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package org.rut.util.algorithm.support; JG&`l{c9
*u.6,jw
import org.rut.util.algorithm.SortUtil; Wh[+cH"M
OQ"%(w>Hb
/** Z0T{1YEJ
* @author treeroot Cd)e_&
* @since 2006-2-2 Et~b^8$>
* @version 1.0 mN3}wJ}J
*/ f'aQ T
public class ImprovedMergeSort implements SortUtil.Sort { ']^e,9=Q
G|FF
private static final int THRESHOLD = 10; '8`{u[:
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/* 7 y}b (q=
* (non-Javadoc) k+S+: 5
* 2%\Nq:;T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jhu<^pjs
*/ _l]`Og@Y
public void sort(int[] data) { pj>b6^TI6C
int[] temp=new int[data.length]; 'Ht$LqG
mergeSort(data,temp,0,data.length-1); dgPJte%i
} ]4SnOSV?S
F^bC!;~x
private void mergeSort(int[] data, int[] temp, int l, int r) { {V%ZOdg9
int i, j, k; Ib.`2@o&
int mid = (l + r) / 2; Im%|9g;P
if (l == r) Zzr+p.
return; n m(yFX?=
if ((mid - l) >= THRESHOLD) f"Yj'`6
mergeSort(data, temp, l, mid); jfF,:(P%W
else +:1ay^YI
insertSort(data, l, mid - l + 1); ~a m]G0
if ((r - mid) > THRESHOLD) 2pFOC;tl
mergeSort(data, temp, mid + 1, r); c/ %5IhX?
else 7r?O(0>
insertSort(data, mid + 1, r - mid); K0 .f4o
LB%_FT5
for (i = l; i <= mid; i++) { K6=-Zf
temp = data; |Axg}Q|
} J'^s5hxn+0
for (j = 1; j <= r - mid; j++) { 5} |O
temp[r - j + 1] = data[j + mid]; 2{c ;ELq
} %~P]x7%|
int a = temp[l]; >|SB]'C|
int b = temp[r]; 2#&9qGR
for (i = l, j = r, k = l; k <= r; k++) { hABC rd Em
if (a < b) { jzV*V<
data[k] = temp[i++]; !3Fj`Oh
a = temp; "{;]T
} else { AWCzu5ve
data[k] = temp[j--]; ^T"9ZBkb
b = temp[j]; uHBX}WH
} xjOy3_Js
} bT-(lIU
} J]ivIQ
|#R;pEn
/** DrbjqQL+.
* @param data 'dM &~LSQ
* @param l D.)$\Caq
* @param i a*&P>Lwe7&
*/ Q_/{TE/sO5
private void insertSort(int[] data, int start, int len) { *2crhI*@>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >JS\H6
} {y<[1Pms
} L5%~H?K(
} >`= '~y8
} FOpOS?Cr'
%*OKhrM
堆排序： E*IkI))X0
Vi`+2%4
package org.rut.util.algorithm.support; gwQL9 UYx
lJoMJS;S]}
import org.rut.util.algorithm.SortUtil; H? N!F7s
]7zDdI|
/** &q1(v3cOO
* @author treeroot cRz7.9-<
* @since 2006-2-2 5R4h9D5
* @version 1.0 $=iz&{9
*/ UV)[a%/SB&
public class HeapSort implements SortUtil.Sort{ =Y|TShKk
U6FM`w<
/* (non-Javadoc) xXH%7%W'f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C]*9:lK
*/ lW'6rat
public void sort(int[] data) { (Z.K3
MaxHeap h=new MaxHeap(); K]zBPfx
h.init(data); ^mFuZ~g;?
for(int i=0;i h.remove(); NAV}q<@v
System.arraycopy(h.queue,1,data,0,data.length); ?PiJ7|
} VZYdCZ&l7
E5 H6&XU
private static class MaxHeap{ <VB
'mpY2|]\$
void init(int[] data){ h+zJ"\
this.queue=new int[data.length+1]; s`Z(f:/6*
for(int i=0;i queue[++size]=data; Yg/e8Q2
fixUp(size); S4s\tA<
} EiI3$y3;
} td q;D
,!kqEIp%
private int size=0; nlHH}K
jnt0,y A
private int[] queue; X1:|
UBpYR> <\
public int get() { Rg<y8~|'}
return queue[1]; A)040n
} e+bpbyV_#
dTyTj|"x{
public void remove() { (rt DT
SortUtil.swap(queue,1,size--); Um;ReJ8z
fixDown(1); sq*R)cZ
} U/yYQZ\)
file://fixdown 56u'XMB?
private void fixDown(int k) { ckP&N:tC
int j; ko im@B
while ((j = k << 1) <= size) { 1 dz&J\|E#
if (j < size %26amp;%26amp; queue[j] j++; /-E>5wU
if (queue[k]>queue[j]) file://不用交换 tbAN{pX
break; ~zRUJ2hD!
SortUtil.swap(queue,j,k); PmvTCfsg
k = j; ho#]?Z#
} B^U5=L[:p
} Ha$|9li`
private void fixUp(int k) { ?ZdHuuDN~
while (k > 1) { f!P.=Qo[=
int j = k >> 1; "My \&0-
if (queue[j]>queue[k]) ,V)yOLApVj
break; vkE6e6,Qc
SortUtil.swap(queue,j,k); "<3PyW?zt
k = j; ^O#,%>1J
} y2\, L
} T9{94Ra
gO<>L0,j
} 6aCAz2/
P_hwa1~d
} {#=q[jVi%1
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SortUtil： X)fj&
ub}t3#
package org.rut.util.algorithm; ^ft_1d[
V.'EP
import org.rut.util.algorithm.support.BubbleSort; =4 &9!Z
import org.rut.util.algorithm.support.HeapSort; *`ji2+4Sjw
import org.rut.util.algorithm.support.ImprovedMergeSort; /4w&! $M-
import org.rut.util.algorithm.support.ImprovedQuickSort; {qx}f^WV
import org.rut.util.algorithm.support.InsertSort; +q) ^pCC
import org.rut.util.algorithm.support.MergeSort; (BMFGyE3
import org.rut.util.algorithm.support.QuickSort; cliP+#
import org.rut.util.algorithm.support.SelectionSort; n1DD+@
import org.rut.util.algorithm.support.ShellSort; jFw?Ky2
nEQw6q~je
/** :uZcN
* @author treeroot HkJ$r<J2
* @since 2006-2-2 .2!'6;K
* @version 1.0 /V46:`V
*/ cc.zC3Hs3
public class SortUtil { m]=|%a6
public final static int INSERT = 1; vhTte |(
public final static int BUBBLE = 2; 6T"[M
public final static int SELECTION = 3; cQu1WgQ G
public final static int SHELL = 4; a[xEN7L~4D
public final static int QUICK = 5; YX18!OhQ
public final static int IMPROVED_QUICK = 6; v)d\ 5#7
public final static int MERGE = 7; ,S:g5n>M
public final static int IMPROVED_MERGE = 8; Jmf&&)p
public final static int HEAP = 9; ~k+-))pf
[#)-F_S
public static void sort(int[] data) { |6"zIHvtc
sort(data, IMPROVED_QUICK); D"bLJj/!
} DWHl,w;[z`
private static String[] name={ /=lrdp!a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;,JCA# N
}; _&.CI6
8>T '
private static Sort[] impl=new Sort[]{ t 4{{5U'\
new InsertSort(), i~n>dc YW
new BubbleSort(), u <%,Ql
new SelectionSort(), d.% Vm&3
new ShellSort(), hi*\5(uH
new QuickSort(), rQ;m|@
new ImprovedQuickSort(), cDxjD5E
new MergeSort(), PZf^r
new ImprovedMergeSort(), jToA"udW/
new HeapSort() (lwkg8WC
}; -1:yqF.x
$vTU|o>|
public static String toString(int algorithm){ Pd%o6~_*
return name[algorithm-1]; hR[Qdu6r
} Q^DKKp
%S]5wR6;_
public static void sort(int[] data, int algorithm) { f<!eJO:<'
impl[algorithm-1].sort(data); zRD{"uqi
} z4&|~-m,
(JL{X`gs#
public static interface Sort { ;5q=/
public void sort(int[] data); 6S2D\Bt,_
} *'QD!Tc
@Ej{sC!0T
public static void swap(int[] data, int i, int j) { z./u;/:
int temp = data; #Ji&.T^U/
data = data[j]; F[l{pc "C
data[j] = temp; SH<Nt[8C
} #QXB2x<*
} +K; X$kB