[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; O.8k [Ht
} 1?Tj
int i1=l; 8]bLp
int i2=mid+1; wLvM<p7OX
for(int cur=l;cur<=r;cur++){ IABF_GwF
if(i1==mid+1) CT'#~~QB
data[cur]=temp[i2++]; XK)0Mt\
else if(i2>r) lB8gD
data[cur]=temp[i1++]; NK:! U
else if(temp[i1] data[cur]=temp[i1++]; gg Nvm
else Yn0iu$;n
data[cur]=temp[i2++]; :-(qqC:
} .SNg2.
} +jKu^f6
PSyUC#;
} [ A 7{}
~)6EH`-
改进后的归并排序: _g'x=VJF
l 3 jlKB
package org.rut.util.algorithm.support; ,3!4 D^
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import org.rut.util.algorithm.SortUtil; yW"[}Lh4
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/** %'S[f
* @author treeroot b"B:DDw00
* @since 2006-2-2 @3S:W2k
* @version 1.0 SzfMQ@~
*/ p\.IP2+c
public class ImprovedMergeSort implements SortUtil.Sort { QFgKEUNgl
1y,/|Y
private static final int THRESHOLD = 10; .8;0O M
"^Y zHq6
/* OGG9f??
* (non-Javadoc) 3.KNAObO
* 7 y$a=+D i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Tk`|{Ph0
*/ %J1oz3n
public void sort(int[] data) { _~S[
int[] temp=new int[data.length]; k~, k@mR
mergeSort(data,temp,0,data.length-1); ,ne3uPRu7~
} ,lFp4C
m1xR uj]
private void mergeSort(int[] data, int[] temp, int l, int r) { =1<v1s|)q
int i, j, k; MT$)A:"
int mid = (l + r) / 2; QV4FA&f&
if (l == r) 4=N(@mS
return; 0sB[]E|7[s
if ((mid - l) >= THRESHOLD) a|4Q6Ycu
mergeSort(data, temp, l, mid); 'rA(+-.M;
else Iyb_5 UmpF
insertSort(data, l, mid - l + 1); tJ&tNSjTi
if ((r - mid) > THRESHOLD) qVjMflVoay
mergeSort(data, temp, mid + 1, r); h 9}x6t,
else >2X-98,
insertSort(data, mid + 1, r - mid); IaU%L6Q]
& x_ #zN]
for (i = l; i <= mid; i++) { Eh$1piJG
temp = data; BO%'/2eV
} -=ZDfM
for (j = 1; j <= r - mid; j++) { q;7DH4;t
temp[r - j + 1] = data[j + mid]; k|U2Mp
} H6U5-
int a = temp[l]; DKkilqVM
int b = temp[r]; :T<5Tq*+x
for (i = l, j = r, k = l; k <= r; k++) { hVui.]
if (a < b) { !(Y,2{
data[k] = temp[i++]; T)',}=
a = temp; Ba**S8{/`
} else { :\y' ?d- Q
data[k] = temp[j--]; JV_VM{w{K
b = temp[j]; f[ia0w5 m
} 4yjIR?
} \k^ojzJ
} |"+Ufw^
`3@?)xa
/** l,zhBnD
* @param data h[Uo6`
* @param l A~ _2"
* @param i *N"CV={No
*/ n=|% H'U
private void insertSort(int[] data, int start, int len) { C7DwA/$D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <XN=v!2;
} NCl@C$W9q
} d`~~Ww1
} 5}c8v2R:B
} FZLx.3k4
c] t@3m
堆排序： h_SkX@"/-
II!~"-WH
package org.rut.util.algorithm.support; =G"ney2
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import org.rut.util.algorithm.SortUtil; TPak,h(1
ww #kc!'
/** 6CSoQ|c{
* @author treeroot 0%4OmLBT
* @since 2006-2-2 |qz%6w=
* @version 1.0 f8`dJ5i
*/ n9n)eI)R
public class HeapSort implements SortUtil.Sort{ p@[ fZj
<fV][W
/* (non-Javadoc) yc`*zLWh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q6<P\CSHy<
*/ P,F eF'J^
public void sort(int[] data) { -4P `:bF
MaxHeap h=new MaxHeap(); JbQY{z!
h.init(data); x*=1C,C
for(int i=0;i h.remove(); * ^V?u
System.arraycopy(h.queue,1,data,0,data.length); 5;,h8vW
} "/mtuU3rt
O?cU6u;W
private static class MaxHeap{ b4WH37,lA
=O-irGms*
void init(int[] data){ (z?j{J
this.queue=new int[data.length+1]; -'SA&[7dP
for(int i=0;i queue[++size]=data; #qpP37G
fixUp(size); To5hVL<Ex"
} Z*Gf`d:
} z?( b|v
| L1+7
private int size=0; 5t"FNL <(M
DfP-(Lm)
private int[] queue; Iy&,1CI"]
WqF$-rBJG^
public int get() { 0!7p5
return queue[1]; ! Dj2/][
} V; CPn
S!+>{JyQ
public void remove() { Kf*Dy:e
SortUtil.swap(queue,1,size--); ^$sqU
fixDown(1); 32j}ep.*
} j@D,2B;
file://fixdown C4P<GtR9
private void fixDown(int k) { 0bT[05.
int j; KIag(!&
while ((j = k << 1) <= size) { Wpi35JrC
if (j < size %26amp;%26amp; queue[j] j++; [uLsM<C
if (queue[k]>queue[j]) file://不用交换 4+s6cQ]S`
break; !8|}-eFY
SortUtil.swap(queue,j,k); 7(N+'8
k = j; <aDZ{T%
} G\TO]c
} %^vT7c>
private void fixUp(int k) { I[d<SHo
while (k > 1) { ]JV'z<
int j = k >> 1; ]bY]YNt{7]
if (queue[j]>queue[k]) (QJe-)0_y
break; rp{|{>'`.q
SortUtil.swap(queue,j,k); x3Y)l1gh
k = j; g\ vT7x
} tiHR&v
} q$mc{F($D
]z/R?SM
} "\KBF
G3%Ju=
} _]pu"hZz4
P(TBFu
SortUtil： XclTyUGoK+
;}"Eqq:
package org.rut.util.algorithm; aR/?YKA
\r[u>7I
import org.rut.util.algorithm.support.BubbleSort; IT&,?u%
import org.rut.util.algorithm.support.HeapSort; %S}uCqcAK
import org.rut.util.algorithm.support.ImprovedMergeSort; 6/Xs}[iJ
import org.rut.util.algorithm.support.ImprovedQuickSort; dK4rrO
import org.rut.util.algorithm.support.InsertSort; ]L7A$sTUQ
import org.rut.util.algorithm.support.MergeSort; 2R.LLE
import org.rut.util.algorithm.support.QuickSort; _Uq' N0U
import org.rut.util.algorithm.support.SelectionSort; <.B+&3')
import org.rut.util.algorithm.support.ShellSort; $[n:IDa*@1
}$4z$&
/** >[,eK=
* @author treeroot ?'9IgT[*
* @since 2006-2-2 d%"XsbO
* @version 1.0 LzNfMvh
*/ . yg#
public class SortUtil { Cl]?qH*:
public final static int INSERT = 1; @XV&^l-
public final static int BUBBLE = 2; ACdPF_Y]
public final static int SELECTION = 3; h%Nd89//
public final static int SHELL = 4; ,7]hjf_h
public final static int QUICK = 5; Bhd)# P
public final static int IMPROVED_QUICK = 6; JHt U"
public final static int MERGE = 7; y~@zfJ5/^
public final static int IMPROVED_MERGE = 8; Kbf(P95+uL
public final static int HEAP = 9; AXW.`~ 4
&|~7`
public static void sort(int[] data) { g-~ _gt7
sort(data, IMPROVED_QUICK); ]myRYb5Z
} J-5>+E,nZ
private static String[] name={ 8Auek#[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !}#> ky!t
}; ]A'{DKR
y]m: {
private static Sort[] impl=new Sort[]{ AcPLJ!y
new InsertSort(), Aj4 a-vd.
new BubbleSort(), `KFEzv
new SelectionSort(), 8b)WOr6n
new ShellSort(), JhFbze>
new QuickSort(), KBmOi
new ImprovedQuickSort(), % D
new MergeSort(), O {1" I
new ImprovedMergeSort(), EIg~^xK
new HeapSort() 'Oue 1[
}; 3I_^F&T
pg4W?N`
public static String toString(int algorithm){ % /VCjuV
return name[algorithm-1]; yu6{6[
} O -1O@:}c
J**(7d
public static void sort(int[] data, int algorithm) { ~v.mbh
impl[algorithm-1].sort(data); vSH,fS-n
} (?7=,A7^
^w60AqR8
public static interface Sort { HcsVq+
public void sort(int[] data); j|k/&q[St
} h|CZ~
oS fr5 i
public static void swap(int[] data, int i, int j) { P1Hab2%+
int temp = data; wtY)(ka
data = data[j]; sFTAE1|
data[j] = temp; tQ|c.`)W
} olE(#}7V
} u ]e-IYH