[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; Iud]*5W
} :z=C
int i1=l; /$]#L%
int i2=mid+1; a(|YLN
for(int cur=l;cur<=r;cur++){ U%E6"Hg
if(i1==mid+1) !uIT5D
data[cur]=temp[i2++]; DyZe+,g;S
else if(i2>r) l# -4}95
data[cur]=temp[i1++]; T(< [k:`
else if(temp[i1] data[cur]=temp[i1++]; 8#NI`s*
else P<Wtv;Z1Z
data[cur]=temp[i2++]; g[Tl#X7F
} ] qT\z<}
} ohI>\
eVRFb#EU0e
} -K+" :kiS
irqNnnMGEa
改进后的归并排序: Z_%9LxZlyj
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package org.rut.util.algorithm.support; ' KX'{Gy
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import org.rut.util.algorithm.SortUtil; F%Te0l
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/** K|"97{*|2
* @author treeroot UG)XA-ez
* @since 2006-2-2 qU ESN!
* @version 1.0 f-Yp`lnn.d
*/ OyU[(
public class ImprovedMergeSort implements SortUtil.Sort { XaFu(Xu7
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private static final int THRESHOLD = 10; )s @}|`
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/* -!X,MDO
* (non-Javadoc) :o!bz>T
* ~ NO9s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YA7h! %52)
*/ ([Gb]0
public void sort(int[] data) { v%mAU3M
int[] temp=new int[data.length]; ze%kP#c6!
mergeSort(data,temp,0,data.length-1); `RRC8]l
} #LP38wE
u9 LP=g
private void mergeSort(int[] data, int[] temp, int l, int r) { xG802?2i/;
int i, j, k; PS*=MyNa
int mid = (l + r) / 2; Y[oNg>Rz
if (l == r) {9yv3[f3
return; T]&% KQ
if ((mid - l) >= THRESHOLD) 'QR @G
mergeSort(data, temp, l, mid); fc}G6P;3{
else HM'P<<
insertSort(data, l, mid - l + 1); 3['aK|qk.
if ((r - mid) > THRESHOLD) y">_$
mergeSort(data, temp, mid + 1, r); FiN^}Kh
else Eb9 eEa<W
insertSort(data, mid + 1, r - mid); K^H{B& b8
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for (i = l; i <= mid; i++) { -pWnO9q
temp = data; ccLTA
} O$'BJKj-4
for (j = 1; j <= r - mid; j++) { ?*2DR:o>@
temp[r - j + 1] = data[j + mid]; v'x)AbbC
} ~Y- !PZ
int a = temp[l]; X\?PnD`,
int b = temp[r]; 8M{-RlR
for (i = l, j = r, k = l; k <= r; k++) { [2]Ti_ >D
if (a < b) { IK:F~I
data[k] = temp[i++]; u@(z(P
a = temp; s-\.j-Sa
} else { (MI8Kkb1d
data[k] = temp[j--]; 3J^"$qfSn
b = temp[j]; 6 WD(
} %Tc P[<
} Td7f
} ;7Hse^Oc
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/** m)5,ut/
* @param data pN-l82]'
* @param l !,;>)R
* @param i 4|?y [j6
*/ ~ULD{Ov'F
private void insertSort(int[] data, int start, int len) { d&!;uzOx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,BUDo9h
} WFl, u!"A
} k0%*{IVPN
} 0|1)cO}Dy
} ~OuKewr\
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堆排序： 0^5*@vt
75u5zD
package org.rut.util.algorithm.support; utH,pGs C.
Y[(U~l,a+
import org.rut.util.algorithm.SortUtil; hJkP_(+J\
SN${cs%
/** {8!\aYI
* @author treeroot W@X/Z8.(
* @since 2006-2-2 v;S_7#
* @version 1.0 q%G"P*g$(
*/ t`b!3U>I
public class HeapSort implements SortUtil.Sort{ ?3f-"K_r
L7\rx w
/* (non-Javadoc) 'U9l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =jz*|e|V
*/ I$rnW
public void sort(int[] data) { PRR]DEz
MaxHeap h=new MaxHeap(); 'Y6x!i2
h.init(data); EWI2qaSnO
for(int i=0;i h.remove(); my.%zF
System.arraycopy(h.queue,1,data,0,data.length); ^Po^Co
} q+KGQ*
2Hh5gD|>
private static class MaxHeap{ oS2L"#
;9WS#>o
void init(int[] data){ Yqpe2II7
this.queue=new int[data.length+1]; n54}WGo>9
for(int i=0;i queue[++size]=data; e`N/3q7
fixUp(size); OMl<=;^:|
} yvQRr75
} NCid`a$
il=:T\'U9
private int size=0; E46+B2_~zk
XL10W ^
private int[] queue; !foiGZ3g
DlD;rL=
public int get() { m2i'$^a#
return queue[1]; ZQY]c
} W%6Y?pf)z
nIckI!U#D
public void remove() { %%7~<=rk
SortUtil.swap(queue,1,size--); 2YS1%<-g*
fixDown(1); T>$S&U
} ^ UB*Q
file://fixdown ZxDh94w/
private void fixDown(int k) { B7y^)/
int j; I%8>nMTJ
while ((j = k << 1) <= size) { ;,OZ8g)LH
if (j < size %26amp;%26amp; queue[j] j++; w=|"{-ijo
if (queue[k]>queue[j]) file://不用交换 aMLtZ7i>
break; Vr|sRvz
SortUtil.swap(queue,j,k); li4"|T&
k = j; vXq2="+
} +dw=)A#/
} 2^V/>|W>w
private void fixUp(int k) { _J N$zZ{
while (k > 1) { B&bQvdp
int j = k >> 1; "8BZj;yS
if (queue[j]>queue[k]) jDyG~de
break; SU8vz/\%y
SortUtil.swap(queue,j,k); %o4d(C B
k = j; KKFV+bK)
} :iKk"r,2P[
} eeOE\
0@BhRf5
} )0tq&
w1N-`S:
} t XbMP
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SortUtil： @v:p)|Ne;
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package org.rut.util.algorithm; ^U5g7Emf
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import org.rut.util.algorithm.support.BubbleSort; Ig.9:v`
import org.rut.util.algorithm.support.HeapSort; o 9?#;B$
import org.rut.util.algorithm.support.ImprovedMergeSort; f@)GiLC'"
import org.rut.util.algorithm.support.ImprovedQuickSort; 3|Vh[iAa\
import org.rut.util.algorithm.support.InsertSort; GIs *;ps7w
import org.rut.util.algorithm.support.MergeSort; gO9\pI2
import org.rut.util.algorithm.support.QuickSort; K:<0!C!
import org.rut.util.algorithm.support.SelectionSort; :m{;<LRV
import org.rut.util.algorithm.support.ShellSort; Bh%Yu*.f
ah8xiABa
/** ?gGmJl
* @author treeroot HW"';M%
* @since 2006-2-2 u3VSS4RG%
* @version 1.0 d[t+iBP;)
*/ _d J"2rx
public class SortUtil { ;oT!\$Mu
public final static int INSERT = 1; +eIX{J\s
public final static int BUBBLE = 2; $Fr>'H+i
public final static int SELECTION = 3; sX,."@[
public final static int SHELL = 4; }zE Qrfl
public final static int QUICK = 5; S0zk<S
public final static int IMPROVED_QUICK = 6; v ?OIK=Xm
public final static int MERGE = 7; p10i_<J]=
public final static int IMPROVED_MERGE = 8; ]Av)N6$&-Z
public final static int HEAP = 9; C8oAl3d+h
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public static void sort(int[] data) { B=,j$uH
sort(data, IMPROVED_QUICK); .!><qVg
} IT5a/;J
private static String[] name={ =D}]|ie
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (&=gM
}; =0" Zse,
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private static Sort[] impl=new Sort[]{ V']{n7a-
new InsertSort(), J Gpy$T{t
new BubbleSort(), Eg/=VBtc
new SelectionSort(), 9Z_!}eY2mc
new ShellSort(), wV&UB@
new QuickSort(), dJYW8pcKT
new ImprovedQuickSort(), {] Zet}2
new MergeSort(), % a9C]?
new ImprovedMergeSort(), ymr#OP$<S
new HeapSort() Xb'UsQ
}; 0;6^fiSY;
uY"Bgz:=d
public static String toString(int algorithm){ aEJds}eE6)
return name[algorithm-1]; >ow5aOlQ&
} K3xs=q]:@
e ab_"W
public static void sort(int[] data, int algorithm) { 2(%C
impl[algorithm-1].sort(data); Ug=)_~
} Xv2u7T\
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public static interface Sort { Ic,V,#my
public void sort(int[] data); O>~ozW&
} @x4IxGlUs
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public static void swap(int[] data, int i, int j) { ZR"BxE0_k
int temp = data; _(&XqEX
data = data[j]; \'}? j-8
data[j] = temp; {Bd 0
} 0DIXd*oj&
} B?|url6h