[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; -Qo`UL.}
} dW;{,Q
int i1=l; )vOZp&
int i2=mid+1; ?yddr`?W
for(int cur=l;cur<=r;cur++){ .{HU1/!
if(i1==mid+1) -"Lia!Q]M
data[cur]=temp[i2++]; h+zJ"\
else if(i2>r) s`Z(f:/6*
data[cur]=temp[i1++]; LYGFEjS[
else if(temp[i1] data[cur]=temp[i1++]; 9%oLv25{)
else xBG&ZM4"^f
data[cur]=temp[i2++]; /#9O{)
} HoymGU`w
} M]jzbJ3Q
$ePAsJ
} ~6!=_"
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改进后的归并排序: RoM'+1nP:#
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package org.rut.util.algorithm.support; ,nMLua\
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import org.rut.util.algorithm.SortUtil; .,l?z
=Z2U
/** &xr?yd
* @author treeroot )Be}Ev#)Zx
* @since 2006-2-2 6h}f^eJ:K,
* @version 1.0 : i3-7k
*/ LB? evewu
public class ImprovedMergeSort implements SortUtil.Sort { T'\lntN
{4CkF\
private static final int THRESHOLD = 10; vb9G_Pfz
"pdG%$
/* ; z:}OD
* (non-Javadoc) :Ff1Js(Z
* h\C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9g"a`a?c
*/ -DX|[70
public void sort(int[] data) { Y!i4P#4+q
int[] temp=new int[data.length]; e.\d7_T+
mergeSort(data,temp,0,data.length-1); Hh$D:ZO
} |g> K$m^
yXc/Nl%
private void mergeSort(int[] data, int[] temp, int l, int r) { M^mS#<!y
int i, j, k; Cf<i"
int mid = (l + r) / 2; ~c! XQJ
if (l == r) p8[Z/]p
return; U;;vNzcn
if ((mid - l) >= THRESHOLD) n0O- Bxhl
mergeSort(data, temp, l, mid); 0Vh|UJ'&7
else +?*,J=/
insertSort(data, l, mid - l + 1); JmWN/mx
if ((r - mid) > THRESHOLD) lj@c"Yrk
mergeSort(data, temp, mid + 1, r); LEc%BQx
else 1 W2AE?
insertSort(data, mid + 1, r - mid); Nk86Y2h
_(<[!c!@0
for (i = l; i <= mid; i++) { xlqRW"
temp = data; u` `FD
} "^zxq5u
for (j = 1; j <= r - mid; j++) { Z)|*mJ
temp[r - j + 1] = data[j + mid]; E$4\Yc)(AL
} _4owxYSDke
int a = temp[l]; <2diO=
int b = temp[r]; }c|Xr^
for (i = l, j = r, k = l; k <= r; k++) { w80g)4V+
if (a < b) { V\PGk<VO
data[k] = temp[i++]; 0>4:(t7h\
a = temp; $}aLFb
} else { o{ \cCZ"
data[k] = temp[j--]; d#vq+wR
b = temp[j]; ^&h|HO-5
} a)Qx43mOS
} o9<jj>R;
} }7X85@jC
<{9E.6G`n
/** [US.n+G6
* @param data fwf]1@#
* @param l ;l &mA1+
* @param i OY51~#BF
*/ 'd|_i6:y&
private void insertSort(int[] data, int start, int len) { jv5p_v4%O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); u(\b1h n
} .?[2,4F;
} ^B1Q";# B^
} }a'8lwF%I
} W _yVVr
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堆排序： U:#9!J?41
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package org.rut.util.algorithm.support; ^WVH z;
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import org.rut.util.algorithm.SortUtil; j Bl I^
+g/y)]AP
/** !HY+6!hk
* @author treeroot 1$q SbQ
* @since 2006-2-2 {E@Vh
* @version 1.0 `V$i*{c:#
*/ FlrLXTx0
public class HeapSort implements SortUtil.Sort{ Yr,e7da
g&\A1H
/* (non-Javadoc) zo7Hm]W`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3O:Z;YP:<
*/ UKZsq5Q
public void sort(int[] data) { {&4+W=0 n
MaxHeap h=new MaxHeap(); R% l=NHB}
h.init(data); = =cAL"Z
for(int i=0;i h.remove(); 8qrE<RHU@
System.arraycopy(h.queue,1,data,0,data.length); /$%apci8
} ]}w~fjq
{Tm31f(oD
private static class MaxHeap{ ](aXZ<,
Z'/:
void init(int[] data){ ]Yp;8#:1
this.queue=new int[data.length+1]; `CUTb*{`
for(int i=0;i queue[++size]=data; }RO Cj,|
fixUp(size); [_^K}\/+
} 3*/y<Z'H
} (m|p|rL
"/(J*)%{
private int size=0; eXc`"T,C.
<omSK- T-
private int[] queue; qYl%v
1Vp['&
public int get() { bvUjH5.7
return queue[1]; GghZ".O
} v<ASkkh>
DKPX_::
public void remove() { ,*+F*:o(m
SortUtil.swap(queue,1,size--); [as\>@o
fixDown(1); ]KA|};>ow
} %S. _3`A
file://fixdown <2fZYt vt
private void fixDown(int k) { q$yTG!q*
int j; qdx(wGG
while ((j = k << 1) <= size) { w+fsw@dK&
if (j < size %26amp;%26amp; queue[j] j++; 4@u*#Bp`|
if (queue[k]>queue[j]) file://不用交换 Ty}'A(U
break; :3gtc/pt>
SortUtil.swap(queue,j,k); 2>Xgo%
k = j; *_}ft-*w
} /3Zo8.
} A%-*M 'J
private void fixUp(int k) { z|Q)^
while (k > 1) { }G]6Rip3
int j = k >> 1; #e}Q|pF
if (queue[j]>queue[k]) 2y>~<S
break; D. fPHq
SortUtil.swap(queue,j,k); i/6(~v
k = j; bz[U<
} +g(>]!swb
} [d`J2^z}
@>}!g9c
} l:-$ulAx
3,8<5)ds*
} ]]Sz|6P
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SortUtil： ,,sKPj[
6U Q~Fv`]
package org.rut.util.algorithm; ,6=j'j1#a
M2W4 RovfR
import org.rut.util.algorithm.support.BubbleSort; z\]]d?d?;
import org.rut.util.algorithm.support.HeapSort; 7y5`YJ}!
import org.rut.util.algorithm.support.ImprovedMergeSort; G|H+ ,B
import org.rut.util.algorithm.support.ImprovedQuickSort; Cvry8B
import org.rut.util.algorithm.support.InsertSort; UMILAoR
import org.rut.util.algorithm.support.MergeSort; bBk_2lg=4)
import org.rut.util.algorithm.support.QuickSort; 4@AY~"dq
import org.rut.util.algorithm.support.SelectionSort; i%_W{;e
import org.rut.util.algorithm.support.ShellSort; n0bm 'qw
Hz) Xn\x
/** J: vq)G\F
* @author treeroot 5Tag-+
* @since 2006-2-2 v*iD)k:|t
* @version 1.0 _C2iP[YwQ{
*/ 2w_[c.
public class SortUtil { !'8.qs
public final static int INSERT = 1; R}_B\#Q
public final static int BUBBLE = 2; Sg
public final static int SELECTION = 3; rE$0a-d2B
public final static int SHELL = 4; 8s16yuM
public final static int QUICK = 5; BpBMFEiP
public final static int IMPROVED_QUICK = 6; ~_6~Fi
public final static int MERGE = 7; cc- liY"
public final static int IMPROVED_MERGE = 8; f^Sl(^f
public final static int HEAP = 9; ~Ap.#VIc'
\5M1;
public static void sort(int[] data) { Q=9Ce@[
sort(data, IMPROVED_QUICK); fUx;_GX?
} 6|:K1bI)
private static String[] name={ #J~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bWWZGl9
}; fm]mqO
tAF#kBa\y_
private static Sort[] impl=new Sort[]{ 6Ck 3tCr
new InsertSort(), OIJNOuI
new BubbleSort(), PgIH(
new SelectionSort(), Iz^h| n
new ShellSort(), 6i'GM`>w
new QuickSort(), dDYD6
new ImprovedQuickSort(), Y\75cfD
new MergeSort(), TS4Yzq,f
new ImprovedMergeSort(), lt08 E2p9
new HeapSort() 0"}qND
}; dyWj+N5(
q>|&u
public static String toString(int algorithm){ "QSmxr
return name[algorithm-1]; /M!b3bmA
} qQjd@J}^
$0 ]xeD0X
public static void sort(int[] data, int algorithm) { 8uAA6h+
impl[algorithm-1].sort(data); .JCd:'-
} L7\V^f%yCm
Rtpk_ND!
public static interface Sort { 9U&~H*Hf
public void sort(int[] data); RK)1@Tz7!
} <ks+JkW_
Hq$&rNnq\
public static void swap(int[] data, int i, int j) { {$qE>ic
int temp = data; M/?eDW/
data = data[j]; >|zMN$:
data[j] = temp; +xNV1bM
} O]_a$U*6
} #1fL2nlP*E