[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; UZJ#/x5F
} |*N;R+b
int i1=l; W'R^GIHs
int i2=mid+1; T (? CDc+
for(int cur=l;cur<=r;cur++){ (9v%66y
if(i1==mid+1) G$;cA:p-j
data[cur]=temp[i2++]; KxQMPtHstz
else if(i2>r) o~26<Lk
data[cur]=temp[i1++]; ^n*:zmD
else if(temp[i1] data[cur]=temp[i1++]; 2Wr^#PY60
else $aHHXd}@t2
data[cur]=temp[i2++]; RhkTN'vO
} UD ;UdehC
} +IG=|X
%#E$wz
} gB]jLe
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改进后的归并排序: I !O5+Er
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package org.rut.util.algorithm.support; UvuAN:'
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import org.rut.util.algorithm.SortUtil; OtoG,~?
'ji|'x T
/** oObQN;A@6
* @author treeroot xMFEeSzl>S
* @since 2006-2-2 sCE%./h]
* @version 1.0 :}-izd)/j
*/ mnFmShu
public class ImprovedMergeSort implements SortUtil.Sort { ff 6x4t
3)hQT-)
private static final int THRESHOLD = 10; 3 5/ s\
4mnVXKt%.
/* ^;wz+u4^l
* (non-Javadoc) 1wBmDEhS
* ym'!f|9AA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wjr^: d
*/ Av!xI
public void sort(int[] data) { |v_ttJ;+Y
int[] temp=new int[data.length]; LR3>_t
mergeSort(data,temp,0,data.length-1); RM>A9nv$\
} vK$wc~
C=JS]2W2
private void mergeSort(int[] data, int[] temp, int l, int r) { @Y!B~
int i, j, k; ^7YZ>^
int mid = (l + r) / 2; mQ2=t%
if (l == r) */4hFD {
return; <TgVU.*
if ((mid - l) >= THRESHOLD) g1@rY0O
mergeSort(data, temp, l, mid); -#,4rN#
else 1P WTbd l
insertSort(data, l, mid - l + 1); ZP ]Ok
if ((r - mid) > THRESHOLD) "iUh.c=0F,
mergeSort(data, temp, mid + 1, r); Ezr q2/~Q
else 0rxGb} b*
insertSort(data, mid + 1, r - mid); WAJKP"
Q;GcV&f;f
for (i = l; i <= mid; i++) { u-*z#e_L0
temp = data; `x;m@\R
} .9vt<<Kwh
for (j = 1; j <= r - mid; j++) { $.4N@=s,?c
temp[r - j + 1] = data[j + mid]; ha7mXGN%
} X2'XbG3
int a = temp[l]; S" (Nf+ux
int b = temp[r]; v7,-Q*
for (i = l, j = r, k = l; k <= r; k++) { _} K3}}
if (a < b) { P3v4!tR
data[k] = temp[i++]; PW\me7iCz
a = temp; ,s/laZ)V
} else { -B#K}xL|x
data[k] = temp[j--]; (S2E'L L{
b = temp[j]; YKzfI9Y
} P_)=sj!>-
} >X*Y jv:r
} \{v-Xe&d^
lv+: `
/** uZ'(fnZ$
* @param data wQa,ol_p
* @param l Y7;=\/SV
* @param i %!8w)1U
*/ i`=%X{9
private void insertSort(int[] data, int start, int len) { 9+ |W;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I]BhkJ
} I= a?z<
} [}l#cG6 k
} RDEK=^J
} c)=a;_h
4vV\vXT*
堆排序： KY?ujeF
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package org.rut.util.algorithm.support; )a9C3-8Y'
POf xN.
import org.rut.util.algorithm.SortUtil; t#w,G
g!OcWy)7
/** `26.+>Z7
* @author treeroot M*D@zb0ia
* @since 2006-2-2 15OzO.Ud
* @version 1.0 E&f/*V^
*/ PcI~,e%
public class HeapSort implements SortUtil.Sort{ V Ds0+RC
Q\N >W+d
/* (non-Javadoc) 2#N?WlYw<S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &MPlSIg
*/ &P"13]^@
public void sort(int[] data) { Uyxn+j5
MaxHeap h=new MaxHeap(); ZrB(!L~7
h.init(data); >< VUly
for(int i=0;i h.remove(); _&S;*?K.
System.arraycopy(h.queue,1,data,0,data.length); Gte\=0Wr
} i)$ySlEh
|>'q%xK
private static class MaxHeap{ pCC^Hxa
t+\<i8
void init(int[] data){ }pGjc_:']
this.queue=new int[data.length+1]; sE ^YOT<
for(int i=0;i queue[++size]=data; ^# 4e_&4
fixUp(size); uc}F|O
} #g'j0N
} zGy+jeH:.
<p-@XzyE
private int size=0; bh#6yvpMR
db&!t!#,
private int[] queue; \S&OAe/b
%(]B1Zg6,
public int get() { ?bg /%o
return queue[1]; 9e.$x%7j
} <{@D^L6h
piqh7u3~
public void remove() { Ya(3Z_f+VZ
SortUtil.swap(queue,1,size--); vU(fd!V ?
fixDown(1); v*c"SI=@M=
} lJ,\^\q
file://fixdown (:\L@j
private void fixDown(int k) { h<8c{RuoZC
int j; f1sp6S0V\
while ((j = k << 1) <= size) { $4qM\3x0,
if (j < size %26amp;%26amp; queue[j] j++; reM~q-M~o@
if (queue[k]>queue[j]) file://不用交换 @!}/$[hu1
break; A.h0H]*Ma
SortUtil.swap(queue,j,k); \v$zU
k = j; rhZp
} <4~SFTWY
} u%Mo.<PI
private void fixUp(int k) { !6a;/ys
while (k > 1) { m(D-?mhL
int j = k >> 1; sH'0utD#Y
if (queue[j]>queue[k]) IiJ$Ng
break; t=|}?lN<
SortUtil.swap(queue,j,k); )u4=k(
k = j; 2%9L'-
} U"oHPK3"TA
} )rlkQ'DN
QpRk5NeLe
} /I{K_G@
f2&6NC;
} k8@bQ"#b
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SortUtil： f6nuh&!-
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package org.rut.util.algorithm; X*w;6 V
)>U"WZ'<
import org.rut.util.algorithm.support.BubbleSort; #2$wI^O
import org.rut.util.algorithm.support.HeapSort; -$_FKny
import org.rut.util.algorithm.support.ImprovedMergeSort; B-$zioZ
import org.rut.util.algorithm.support.ImprovedQuickSort; wXZ9@(^
import org.rut.util.algorithm.support.InsertSort; &9z&#`AY]>
import org.rut.util.algorithm.support.MergeSort; eu~ u-}.
import org.rut.util.algorithm.support.QuickSort; ~%eE%5!k
import org.rut.util.algorithm.support.SelectionSort; O(v>\MV
import org.rut.util.algorithm.support.ShellSort; B9$pG
[_(uz,'
/** BUV4L5(
* @author treeroot />pAZa
* @since 2006-2-2 k\9kOZW
* @version 1.0 QDVSFGwr
*/ X.FoX
public class SortUtil { ~4O3~Y_+GN
public final static int INSERT = 1; hl] y):
public final static int BUBBLE = 2; oiC@ /
public final static int SELECTION = 3; !&3"($-U3G
public final static int SHELL = 4; RlbJ4`a
public final static int QUICK = 5; D>ou,
public final static int IMPROVED_QUICK = 6; B&y?Dc
public final static int MERGE = 7; r!w*y3
public final static int IMPROVED_MERGE = 8; %tC[q
public final static int HEAP = 9; 3gD <!WI
2X*n93AQi
public static void sort(int[] data) { b?VByJl
sort(data, IMPROVED_QUICK); 7/_|/4&
} ;!lwB
private static String[] name={ bv7xh*/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" '.8eLN
}; 1?3+>
#W l^!)#j?
private static Sort[] impl=new Sort[]{ %_CL/H
new InsertSort(), .Cs'@[Ciy
new BubbleSort(), .IVKgQ B
new SelectionSort(), *uP;rUY
new ShellSort(), -N5h`Ii7
new QuickSort(), .*xO/pn
new ImprovedQuickSort(), 0NU3% 4?
new MergeSort(), qm'@o -[
new ImprovedMergeSort(), X+<9-]=
new HeapSort() 9`5.0**
}; mG\9Qkom|
,\#j6R,{I
public static String toString(int algorithm){ kmo#jITa`
return name[algorithm-1]; ' V*}d
} w7Mh8'P54
u,}>I%21
public static void sort(int[] data, int algorithm) { DMs8B&Y=
impl[algorithm-1].sort(data); 9C{Xpu
} l@u "iGw
Pth4_]US
public static interface Sort { x1STjI>i
public void sort(int[] data); $}5M`p\&C
} Z=;=9<vA
e%4vvPp
public static void swap(int[] data, int i, int j) { {f*{dSm9b
int temp = data; |2=w":2#
data = data[j]; w@O)b-b|w
data[j] = temp; ;`kOFg#`)c
} S4_ZG>\VT
} + 65<|0