[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; N2&h yM
} K5 Z'kkOk
int i1=l; oEsqLh9a|
int i2=mid+1; M8|kmF\B
for(int cur=l;cur<=r;cur++){ 6o~CX
if(i1==mid+1) '19kP.
data[cur]=temp[i2++]; c> ":g~w
else if(i2>r) R RnT.MU
data[cur]=temp[i1++]; yAu.=Eo7
else if(temp[i1] data[cur]=temp[i1++]; `A$zLqz)Vm
else `}#n#C)
data[cur]=temp[i2++]; P.kf|,8L
} b\C1qM4
} 4GexYDk'#
V(F1i%9lg
} _s+_M+@et
cfL:#IM
改进后的归并排序: 3H`ES_JL
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package org.rut.util.algorithm.support; uk)D2.eS,
h`:B8+k
import org.rut.util.algorithm.SortUtil; 0f"la=6
kjj?X|Un
/** <'vtnz
* @author treeroot W=2#Q2)
* @since 2006-2-2 <4%PT2R
* @version 1.0 goc"+K
*/ Q`BB@E
public class ImprovedMergeSort implements SortUtil.Sort { cL:hjr"
DhT8Kh{
private static final int THRESHOLD = 10; -{Fy@$!
#z9@x}p5g
/* yOyuMZo6
* (non-Javadoc) Y|aaZ|+
* |],ocAN{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H~?p,h
*/ eI+p
public void sort(int[] data) { zJG=9C?
int[] temp=new int[data.length]; 5>&C.+A 9
mergeSort(data,temp,0,data.length-1); }c'T]h\S
} zX&wfE8T
XO}v8nWV
private void mergeSort(int[] data, int[] temp, int l, int r) { w s7LDY&(
int i, j, k; ~4M?[E&
int mid = (l + r) / 2; d*Kg_He-
if (l == r) _OJ19Ry
return; TFtD>q X
if ((mid - l) >= THRESHOLD) R^Y_i
mergeSort(data, temp, l, mid); |4F'Zu}g>
else )0{ZZ-beG
insertSort(data, l, mid - l + 1); y@\J7 h:
if ((r - mid) > THRESHOLD) 2UEjn>2
mergeSort(data, temp, mid + 1, r); VP:9&?>G
else [\.@,Y0j
insertSort(data, mid + 1, r - mid); 7z3YzQ=Kg
(BY5omlh
for (i = l; i <= mid; i++) { pt~b=+bBm
temp = data; -{eI6#z|\A
} lNB<_SO
for (j = 1; j <= r - mid; j++) { .<.#g+
temp[r - j + 1] = data[j + mid]; 7DIFJJE'
} Mgg m~|9)
int a = temp[l]; )OV2CP
int b = temp[r]; AP(%m';
for (i = l, j = r, k = l; k <= r; k++) { I=&Kn@^
if (a < b) { 9l}G{u9a
data[k] = temp[i++]; nrCr9#
a = temp; 2w>yW]
} else { F^X:5g~K
data[k] = temp[j--]; &U yQ<O>
b = temp[j]; ?V4bz2#!1O
} R<e ~Cb-
} pSS8 %r%S'
} "M=1Eb$6=
n<Z1i)
/** {'[S.r`
* @param data fk(h*L|sI
* @param l @+!u{
* @param i w7yz4_:x^
*/ %#@5(_'
private void insertSort(int[] data, int start, int len) { h3P^W(=&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $WG<
} :PQvt/-'(D
} zl!Y(o!@
} AR7]~+X
} *hkNJ
zl@hg<n
堆排序： Wh1'?#
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package org.rut.util.algorithm.support; U].3vju`c
zC_@wMWB
import org.rut.util.algorithm.SortUtil; "j?\Ze*
'SnB7Y
/** JI|MR#_u
* @author treeroot td(4Fw||1y
* @since 2006-2-2 RV_+-m{]
* @version 1.0 i" >kF@]c8
*/ j~k+d$a
public class HeapSort implements SortUtil.Sort{ v42Z&PO
L'<.#(|
/* (non-Javadoc) d`4F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U t.#h="
*/ 9M1UkS$`@
public void sort(int[] data) { zAO|{m<A2
MaxHeap h=new MaxHeap(); hbE~.[Y2r
h.init(data); 3V@!}@y,F6
for(int i=0;i h.remove(); w*B4>FYg
System.arraycopy(h.queue,1,data,0,data.length); utBKl'`
} aui3Mq#f
(zIIC"~5
private static class MaxHeap{ f"0?_cG{%
OQh4MN#$
void init(int[] data){ XJZS}Z7h
this.queue=new int[data.length+1]; z9HUI5ns
for(int i=0;i queue[++size]=data; v?`DP
fixUp(size); kr>F=|R]
} TV*@h2C"i
} E{}Vi>@V?
Qk`LBvg1
private int size=0; v_NL2eQ~
#lO~n.+P
private int[] queue; z;6,,
qt4^e7o
public int get() { 0M|Jvw'n|
return queue[1]; Qs;MEt1
} D4\ * ,w
FP9FE `x
public void remove() { yf2$HF
SortUtil.swap(queue,1,size--); A!^gF~5
fixDown(1); y\c-I!6>26
} *e *V%w~75
file://fixdown H:.l:PJ
private void fixDown(int k) { *#Hw6N0#
int j; \#q|.d$u
while ((j = k << 1) <= size) { U$^$7g 3
if (j < size %26amp;%26amp; queue[j] j++; ;'4HR+E"
if (queue[k]>queue[j]) file://不用交换 ]j57Gk%z
break; w}r~Wk^dLI
SortUtil.swap(queue,j,k); B),Z*lpC
k = j; {x<yDDIv_
} 0:qR,NW^#
} xoyH5ZK@
private void fixUp(int k) { *{s 3.=P.
while (k > 1) { *1CZRfWI
int j = k >> 1; q1vsvL9Q
if (queue[j]>queue[k]) >!%F$$
break; 2~RG\JWTA
SortUtil.swap(queue,j,k); .Fm@OQr
k = j; #Hi$squJ
} Bf{c4YiF
} |}naI_Qudv
jRNDi_u?Wb
} )jHH-=JM
eD?f|bif
} &AhkP=Yw
zHk7!|%Y
SortUtil： TI}Y U
q@Oe}
package org.rut.util.algorithm; B):hm
{`=k$1
import org.rut.util.algorithm.support.BubbleSort; D);w)`
import org.rut.util.algorithm.support.HeapSort; J3,m{%EtNM
import org.rut.util.algorithm.support.ImprovedMergeSort; &~sirxR p
import org.rut.util.algorithm.support.ImprovedQuickSort; Pj{Y
import org.rut.util.algorithm.support.InsertSort; 22FHD4
import org.rut.util.algorithm.support.MergeSort; /L*JHNu"_
import org.rut.util.algorithm.support.QuickSort; .l +yK-BZ
import org.rut.util.algorithm.support.SelectionSort; > ,;<Bz|X
import org.rut.util.algorithm.support.ShellSort; ^~K[bFbW
vnD `+y
/** sG8G}f
* @author treeroot pT'jX^BU
* @since 2006-2-2 OO*2>Qy~z
* @version 1.0 $#/f+kble
*/ ^s_7-p])(
public class SortUtil { `$i/f(t6`
public final static int INSERT = 1; ']DUCu
public final static int BUBBLE = 2; yNOoAnGT W
public final static int SELECTION = 3; +S ],){
public final static int SHELL = 4; >m#bj^F\
public final static int QUICK = 5; 9#b/D&pX5
public final static int IMPROVED_QUICK = 6; 55Ag<\7
public final static int MERGE = 7; ]1&}L^a
public final static int IMPROVED_MERGE = 8; _q=ua;I&
public final static int HEAP = 9; p}K.-S`MQ
%hCd*[Z}j
public static void sort(int[] data) { $c}-/U 8
sort(data, IMPROVED_QUICK); #8@o%%Fd
} .T\_4C
private static String[] name={ @23~)uiZa
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R/Z zmb{
}; d34BJ<
8ib%CYR
private static Sort[] impl=new Sort[]{ MkX=34oc^
new InsertSort(), }0~X)Vgm(
new BubbleSort(), 2VaKt4+`
new SelectionSort(), qA5 Ug
new ShellSort(), 3H,?ZFFGz
new QuickSort(), Ri;_ 8v[H|
new ImprovedQuickSort(), Aqo90(jffx
new MergeSort(), r>cN,C
new ImprovedMergeSort(), &l?AC%a5
new HeapSort() 6o<(,\ad[
}; |(3"_
z#^;'nnw
public static String toString(int algorithm){ :s>x~t8g#n
return name[algorithm-1]; <d~si^*\ch
} ?tx."MZ
j9~lf
public static void sort(int[] data, int algorithm) { t[o_!fmxZ
impl[algorithm-1].sort(data); a6!|#rt
} t4Pi <m:7
D`3`5.b
public static interface Sort { FA!!S`{\
public void sort(int[] data); P(cy@P,D
} )W*A[c 2
#Fz/}lO
public static void swap(int[] data, int i, int j) { M.\V/OX
int temp = data; 4/AE;yX
data = data[j]; OxqkpK&
data[j] = temp; SVBo0wvz-
} UX%J?;g
} 45;ey }8