[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; W}XDzR'<
} 7H9&\ur9+
int i1=l; He~)i)co
int i2=mid+1; iVwI}%k
for(int cur=l;cur<=r;cur++){ v2/@Pu!kg
if(i1==mid+1) #r>
data[cur]=temp[i2++]; D&:,,Dp
else if(i2>r) <mi*AY
data[cur]=temp[i1++]; 6-j><'
else if(temp[i1] data[cur]=temp[i1++]; evz{@;.R
else W(Xb]t=19
data[cur]=temp[i2++]; eM{,B
} ms`R^6Ra
} YyjnyG
sO,,i]a0
} ~*ST fyFw
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改进后的归并排序: [,yoFm%"
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package org.rut.util.algorithm.support; w<*6pPy
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import org.rut.util.algorithm.SortUtil; 'MVE5
#2^eGhwnI
/** 2mRm.e9?
* @author treeroot bM+}j+0
* @since 2006-2-2 <My4)3
* @version 1.0 |eU{cK~e^
*/ au1uFu-
public class ImprovedMergeSort implements SortUtil.Sort { !EB<e5}8wK
F4`ud;1H
private static final int THRESHOLD = 10; >kU$bh.(
$oDc
/* ?:H4Xd7
* (non-Javadoc) 4$~eG"wu
* (_Ph{IN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !?#B*JGFS
*/ CD]"Q1 t}
public void sort(int[] data) { U9[QdC
int[] temp=new int[data.length]; Na=.LW-ma=
mergeSort(data,temp,0,data.length-1); vz[oy|{F
} mu@He&w"
Utd`T+AF*
private void mergeSort(int[] data, int[] temp, int l, int r) { r01Z 0>
int i, j, k; !Z]#1"A8
int mid = (l + r) / 2; lkl+o&D9
if (l == r) td@I ;d2
return; 3k3-Ts
if ((mid - l) >= THRESHOLD) /Ps/m!
mergeSort(data, temp, l, mid); 8A'oK8Q
else QMwrt
insertSort(data, l, mid - l + 1); 3)cH\gsg9
if ((r - mid) > THRESHOLD) AAuH}W>n
mergeSort(data, temp, mid + 1, r); >BFUts%
else }$ C;ccWL
insertSort(data, mid + 1, r - mid); !Pd@0n4
"{>BP$Jz
for (i = l; i <= mid; i++) { n-P<y
temp = data; (qo ?e2K
} x *:v]6y
for (j = 1; j <= r - mid; j++) { ]L)l5@5^
temp[r - j + 1] = data[j + mid]; ?DJ/Yw>>3
} B6UTooj
int a = temp[l]; 'vCl@x$
int b = temp[r]; .=G?Zd
for (i = l, j = r, k = l; k <= r; k++) { \D67J239E
if (a < b) { F)K&a
data[k] = temp[i++]; &lM=>?
a = temp; HV21=W
} else { IX+!+XC"U
data[k] = temp[j--]; -,:^dxE'
b = temp[j]; C}jFR] x)
} T&'p5h=l
} E>_N|j)9
} '<=77yDg
h8XoF1wuw
/** " l;=jk]
* @param data 9u?[{h.`B
* @param l s$g3__|Y
* @param i nz2`YyR
*/ CWdpF>En
private void insertSort(int[] data, int start, int len) { t4d^DZDh!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7H])2:)
} xyzYY}PS
} '><I|c}
} @oKW$\
} &TTvX%T
Yj"{aFK#u@
堆排序： mswAao<y&x
D]=V6l=
package org.rut.util.algorithm.support; &v)/mc7D
j82x$I*
import org.rut.util.algorithm.SortUtil; "W^+NeLc
w<LV5w+
/** X<sM4dwxE
* @author treeroot :8t;_f
* @since 2006-2-2 )ko[_OJj
* @version 1.0 Bv xLbl}
*/ ;: xE'-
public class HeapSort implements SortUtil.Sort{ kxCN0e#_
:@4+}
/* (non-Javadoc) )tm%0z7R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2WUl8?f2Y
*/ 1<G,0Lt
public void sort(int[] data) { )vD:
MaxHeap h=new MaxHeap(); ]P*H,&I`#
h.init(data); U! $/'Xi9
for(int i=0;i h.remove(); qDS~|<Y5
System.arraycopy(h.queue,1,data,0,data.length); <5!)5+G
} qm/#kPlM
Hkrhd
private static class MaxHeap{ XUVBD;"f!
v%muno,
void init(int[] data){ CH$K_\
this.queue=new int[data.length+1]; gq~K(Q<O<
for(int i=0;i queue[++size]=data; b5)1\ANq
fixUp(size); &q>C
} 3!op'X!
} 8;d./!|'&g
bjBXs;zr@\
private int size=0; 7q&T2?GEN
)i"52!
private int[] queue; G:!3X)b
uquY z_2
public int get() { d(YAH@
return queue[1]; (qw;-A W8
} U!jRF
eIj2(q9
public void remove() { ]+5Y\~I
SortUtil.swap(queue,1,size--); l0PXU)>C
fixDown(1); ,&iEn}xG7i
} /b]+RXvxj
file://fixdown e$`;z%6y
private void fixDown(int k) { }XD=N#p@z
int j; 0.wNa~_G|
while ((j = k << 1) <= size) { :z`L)
if (j < size %26amp;%26amp; queue[j] j++; W0S\g#
if (queue[k]>queue[j]) file://不用交换 F?Fxm*Wa/
break; 0HI0/Tvu$<
SortUtil.swap(queue,j,k); W[LQ$uj
k = j; p^C$(}Yh
} 7O~hA*Z
} G;e)K\[J
private void fixUp(int k) { HggINMG
while (k > 1) { \0;EHB
int j = k >> 1; &hEkm
if (queue[j]>queue[k]) !KtP> `8
break; /~{fPS
SortUtil.swap(queue,j,k); :j[=
k = j; Bxf&gDwjgr
} )0\D1IFJ
} "td ,YVK
]u\-_PP
} K_Kz8qV.?
&x3R+(H {
} 1QbD]"=n
})?KpYk
SortUtil： S" PJ@E}^E
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package org.rut.util.algorithm; xf;Tk
C;YtMY:
import org.rut.util.algorithm.support.BubbleSort; }}LjEOvL=
import org.rut.util.algorithm.support.HeapSort; CpU y~
import org.rut.util.algorithm.support.ImprovedMergeSort; $'w>doUlA
import org.rut.util.algorithm.support.ImprovedQuickSort; Yq:+.UU
import org.rut.util.algorithm.support.InsertSort; l]L"Ex{
import org.rut.util.algorithm.support.MergeSort; 7WHq'R{@
import org.rut.util.algorithm.support.QuickSort; !]MGIh#u
import org.rut.util.algorithm.support.SelectionSort; &S[>*+}{+
import org.rut.util.algorithm.support.ShellSort; (Bss%\
+;a\ gF^
/** c^~R%Bx
* @author treeroot lT8^BT
* @since 2006-2-2 l Ma||
* @version 1.0 |~+bbN|b
*/ `pXPF}T
public class SortUtil { p[%B#(]9,
public final static int INSERT = 1; ?:7.3{|Aq
public final static int BUBBLE = 2; vv D515i
public final static int SELECTION = 3; q+)s
public final static int SHELL = 4; ]x@36Ok)A
public final static int QUICK = 5; rW2l+:@c
public final static int IMPROVED_QUICK = 6; >Ft:&N9L{
public final static int MERGE = 7; BAy)P1
public final static int IMPROVED_MERGE = 8; >L^2Z*
public final static int HEAP = 9; -l<[CI
FXbalQ?^
public static void sort(int[] data) { ej[Y `N
sort(data, IMPROVED_QUICK); |iVw7M:
} +L pMNnl6
private static String[] name={ 9-.`~v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5r^u7k
}; H6Kt^s<6xu
Cp]q>lM"
private static Sort[] impl=new Sort[]{ GC@U['
new InsertSort(), (X|lK.W y
new BubbleSort(), npcL<$<6X
new SelectionSort(), `o%Ua0x2
new ShellSort(), 6z5?9I4[
new QuickSort(), ~./M5P!\
new ImprovedQuickSort(), WE&"W$0
new MergeSort(), b|U3\Fmc
new ImprovedMergeSort(), 4K!@9+Mz
new HeapSort() cC$E"m
}; `3vt.b
b@[\+P] "
public static String toString(int algorithm){ ?r R, h{~
return name[algorithm-1]; H?j}!JzAC
} -l$-\(,M`#
_'P!>C!
public static void sort(int[] data, int algorithm) { I z)~h>-F
impl[algorithm-1].sort(data); $,jynRk7q
} l_ycB%2e^
Gl5W4gW;&
public static interface Sort { ANd#m9(x
public void sort(int[] data); vUgo)C#<
} lLZ?&z$
!{4bC
public static void swap(int[] data, int i, int j) { C6c]M@6
int temp = data; EYU3Pl%
data = data[j]; **Q K}j[D
data[j] = temp; 8yCQWDE}
} ,IG?(CK|
} ;%Zn)etu