[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; 1&jX~'
} 44%::Oh
int i1=l; |:!0`p{R
int i2=mid+1; D<xPx
for(int cur=l;cur<=r;cur++){ U7PA%
if(i1==mid+1) )%^oR5W
data[cur]=temp[i2++]; -D!F|&$
else if(i2>r) I*lq0&
data[cur]=temp[i1++]; boN)C?"^h
else if(temp[i1] data[cur]=temp[i1++]; uaU!V4-
else 7ZZSAI
data[cur]=temp[i2++]; 2A`EFk7_X
} P45q}v
} SF.,sCk
a S<JsB
} 6 Dg[b
h@W}xT
改进后的归并排序: |d%Dw^
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package org.rut.util.algorithm.support; y|MW-|0=!
t4gD*j6J3
import org.rut.util.algorithm.SortUtil; Mm6 (Q
7FMHz.ZRE
/** %{}Jr`
* @author treeroot k ,<L#?,a
* @since 2006-2-2 0.@/I}R[
* @version 1.0 #h r!7Kc;N
*/ Wb4sfP_
public class ImprovedMergeSort implements SortUtil.Sort { <CA lJ
5lU`o
private static final int THRESHOLD = 10; !/jx4w~R
'kh%^_FH7
/* m2_&rjGz
* (non-Javadoc) ^1Yx'ua'
* JWn9&WK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &0>{mq}p,:
*/ CS"p[-0
public void sort(int[] data) { %djx0sy
int[] temp=new int[data.length]; ! prU!5-
mergeSort(data,temp,0,data.length-1); @'}X&TN<a
} -TD6s:'
"V9!srIC
private void mergeSort(int[] data, int[] temp, int l, int r) { RisrU
int i, j, k; *K+*0_
int mid = (l + r) / 2; G %#us3x
if (l == r) 2}}~\C}o+
return; $iP#8La:Y
if ((mid - l) >= THRESHOLD) 5X`.2q=d
mergeSort(data, temp, l, mid); 7PisX!c,h
else C&5T;=<jKO
insertSort(data, l, mid - l + 1); y!v$5wi
if ((r - mid) > THRESHOLD) @{nT4{
mergeSort(data, temp, mid + 1, r); 4uu*&B
else wPc,FH+y
insertSort(data, mid + 1, r - mid); Zy!\=-dSm
u@gYEx}
for (i = l; i <= mid; i++) { =vK(-h
temp = data; T.(SBP
} xE)pj|
for (j = 1; j <= r - mid; j++) { o<g (%ncr
temp[r - j + 1] = data[j + mid]; /4T%&#6s
} ?v")Z0 ~
int a = temp[l]; 94a_ W9
int b = temp[r]; 3aDma/
for (i = l, j = r, k = l; k <= r; k++) { |2oB3 \)/
if (a < b) { +QHhAA$
data[k] = temp[i++]; u{3KV6MS
a = temp; S((8DSt*
} else { He]F~GXP
data[k] = temp[j--]; ntF(K/~Y
b = temp[j]; GB !3Z
} "^trHh8=
} ~z aV.3#
} ~P/G^cV3s
L9kSeBt
/** tjTF?>^6|
* @param data [2FXs52
* @param l N\Hd3Om
* @param i 8bK}&*z<
*/ []Fy[G.)H
private void insertSort(int[] data, int start, int len) { ~z'0~3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X'u`\<&W
} |BW956fBU
} }YSH8d
} Qy$QOtrv
} PAc~p8S
4({=(O
堆排序： ,>g 6OU2~6
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package org.rut.util.algorithm.support; J`V6zGgW
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import org.rut.util.algorithm.SortUtil; *FAg^G&1
N&ddO-r[s
/** WI6er;D
* @author treeroot K{iayg!k
* @since 2006-2-2 *1%g=vb
* @version 1.0 {Ise (>V
*/ \agC Q&
public class HeapSort implements SortUtil.Sort{ ?3|ZS8y
h]=chz
/* (non-Javadoc) <B fwR$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rcbixOT
*/ C4G)anT
public void sort(int[] data) { ~Ep&:c4:D
MaxHeap h=new MaxHeap(); asJYGqdF
h.init(data); }.hBmhnZmI
for(int i=0;i h.remove(); @%TQ/L^|
System.arraycopy(h.queue,1,data,0,data.length); ECSC,oJ
} K:Ap|F
[Ytia#Vv
private static class MaxHeap{ H}$#aXEAn
T8\,2UWsj2
void init(int[] data){ %sq=lW5R{b
this.queue=new int[data.length+1]; K)v(Z"
for(int i=0;i queue[++size]=data; :{AN@zC0\
fixUp(size); cK258mY
} dn5v|[dJ
} q{@Wn]!k
q3[LnmH
private int size=0; UkYQ<MNO
i3~!ofTb
private int[] queue; F+6ZD5/
p!691LI
public int get() { O3_Mrn(R
return queue[1]; !of7]s
} jab]!eY
K4rr.f6
public void remove() { H{V-C_
SortUtil.swap(queue,1,size--); z6!X+`&
fixDown(1); 'l}3Iua6qk
} vIREvj#U
file://fixdown m=K XMX
private void fixDown(int k) { ^wHMKC
int j; .SsIU\[)
while ((j = k << 1) <= size) { f^]AyU;F:
if (j < size %26amp;%26amp; queue[j] j++; 55I>v3 w
if (queue[k]>queue[j]) file://不用交换 `SG70/
break; 5FzRusNiA
SortUtil.swap(queue,j,k); I)x:NF6JO
k = j; :.~a[\C@V<
} jTqba:q@
} V.F 's(o
private void fixUp(int k) { nFP2wvFM
while (k > 1) { eS"gHldz
int j = k >> 1; Brl6r8LGi
if (queue[j]>queue[k]) EvYw$j
break; <Kh\i'8
SortUtil.swap(queue,j,k); ZJ4"QsF
k = j; A/QVotcU
} YOY+z\Q
} U%4g:s
ke%zp-2c
} X1-s,[j'
?yz%r`;r
} w(yU\ N
qYh,No5\;t
SortUtil： -3V~YhG
i`Yf|^;@2>
package org.rut.util.algorithm; b'OO~>86
!69^kIi$
import org.rut.util.algorithm.support.BubbleSort; 1D`RR/g&
import org.rut.util.algorithm.support.HeapSort; {7wvC)WW
import org.rut.util.algorithm.support.ImprovedMergeSort; ky#6M? \
import org.rut.util.algorithm.support.ImprovedQuickSort; QA3l:D}u
import org.rut.util.algorithm.support.InsertSort; KZE.}8^%D
import org.rut.util.algorithm.support.MergeSort; 2eK\$_b_
import org.rut.util.algorithm.support.QuickSort; y((_V%F}
import org.rut.util.algorithm.support.SelectionSort; WY,t> 1c
import org.rut.util.algorithm.support.ShellSort; .~8+s.y
:+5afv}
/** gv,T<A?Z2
* @author treeroot <\8
* @since 2006-2-2 =oTYwU
* @version 1.0 U&5zs r
*/ SQ!lgm1bA
public class SortUtil { ]UI+6}r
public final static int INSERT = 1; t[maUy_A
public final static int BUBBLE = 2; >R:+ml
public final static int SELECTION = 3; b[k 1)R"
public final static int SHELL = 4; GlZ9k-ZRF
public final static int QUICK = 5; [E^X=+Jnz
public final static int IMPROVED_QUICK = 6; g-^m\>B
public final static int MERGE = 7; oD7H6\_
public final static int IMPROVED_MERGE = 8; oL@ou{iQ
public final static int HEAP = 9; -7$'* V9$
]~zJ7I
public static void sort(int[] data) { h=tu+pn
sort(data, IMPROVED_QUICK); 16y$;kf8
} c-T ^ aR
private static String[] name={ gh}AD1TN]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >(rB[ZJ
}; ^;3rdBprm
CJOl|"UyJ
private static Sort[] impl=new Sort[]{ 8?YW i
new InsertSort(), `|w#K28t"
new BubbleSort(), +m.8*^
new SelectionSort(), ) T1oDk
new ShellSort(), *N r|G61
new QuickSort(), >FHsZKJ
new ImprovedQuickSort(), -IS9uaT5
new MergeSort(), /RC!Yi
new ImprovedMergeSort(), Yel(}Ny
new HeapSort() 2P ?Iu&
}; >>cd3)b
48Lmy<}*
public static String toString(int algorithm){ [8P2V
return name[algorithm-1]; 3R*@m
} aTm.10{^
weV#%6=5\
public static void sort(int[] data, int algorithm) { cv4M[]U~
impl[algorithm-1].sort(data); 2S6EDXc
} =.oWguzu
ws?s
public static interface Sort { I0vnd7
public void sort(int[] data); D,j5k3< #
} @>IjfrjV
,rI |+
public static void swap(int[] data, int i, int j) { A4FDR#
int temp = data; emB D@r
data = data[j]; -ikuj
data[j] = temp; :"^< aLj
} PL$F;d
} bJF/daC5