[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; &n:.k}/P
} QlU8uI[dk
int i1=l; &B1WtW
int i2=mid+1; bK&+5t&
for(int cur=l;cur<=r;cur++){ GGs}i1m
if(i1==mid+1) HQhM'x
data[cur]=temp[i2++]; OA;XiR$xP
else if(i2>r) Ai3*QX
data[cur]=temp[i1++]; I,vJbvvl!
else if(temp[i1] data[cur]=temp[i1++]; lX4 x*
else 4vB<fPN
data[cur]=temp[i2++]; $uVHSH5l
} ENs&RZ;
} t-bB>q#3>
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} 7~.9=I'A
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改进后的归并排序: u\;C;I-? '
YUy0!`!`
package org.rut.util.algorithm.support; F{;((VboN
+VOK%8,p
import org.rut.util.algorithm.SortUtil; BUXpCxQ
KB(8f*
/** M%P:n/j
* @author treeroot )1`0PJoHE
* @since 2006-2-2 w_K1]<Q*
* @version 1.0 m~0/&RA
*/ $B5aje}i
public class ImprovedMergeSort implements SortUtil.Sort { tFOhL9T
w+u3*/Zf
private static final int THRESHOLD = 10; Txb#C[`
|t#)~Oo
/* j{+.tIzpq[
* (non-Javadoc) [/41%B2
* /"Uqa,{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R8Fv{7]c
*/ 'e'cb>GnA
public void sort(int[] data) { {fT6O&br
int[] temp=new int[data.length]; Z o(rTCZX
mergeSort(data,temp,0,data.length-1); z5*'{t)
} JOeeU8C
?J>
private void mergeSort(int[] data, int[] temp, int l, int r) { 7?w*]
int i, j, k; Ne1$ee.NE
int mid = (l + r) / 2; Si;H0uPO
if (l == r) MeZf*' J
return; K_Eux rPn
if ((mid - l) >= THRESHOLD) 5MJS ~(
mergeSort(data, temp, l, mid); #BH*Z(
else `1IgzKL9
insertSort(data, l, mid - l + 1); R`E~ZWC4V
if ((r - mid) > THRESHOLD) $c(nF01
mergeSort(data, temp, mid + 1, r); -;WGS o
else TJXT-\Vk
insertSort(data, mid + 1, r - mid); U26}gT)
5vnrA'BhBU
for (i = l; i <= mid; i++) { ~6LN6}~|.
temp = data; @*KZ}i@._
} 5#E`=C%
for (j = 1; j <= r - mid; j++) { &`2)V;t
temp[r - j + 1] = data[j + mid]; 8$Y9ORs4
} lA8`l>I
int a = temp[l]; di )L[<$DY
int b = temp[r]; :P0mx
for (i = l, j = r, k = l; k <= r; k++) { iSs:oH3l
if (a < b) { 3eQ&F~S
data[k] = temp[i++]; `*1p0~cu
a = temp; p>8D;#HmL
} else { 0{-q#/
data[k] = temp[j--]; NyNXP_8
b = temp[j]; ' %o#q6O
} WX3-\Y5E
} "87:?v[[1
} =fFP5e ['
sdw(R#GE
/** =]0&i]z[.
* @param data v0.#Sl-
* @param l BR;D@R``}
* @param i t'k$&l}+
*/ 3AN/ H
private void insertSort(int[] data, int start, int len) { XUuN )i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $*=<Yw4
} bY~pc\V:`w
} 'E""amIJ
} oe-\ozJ0
} L) T (<
Qh\60f>0
堆排序： 9InVQCf2J
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package org.rut.util.algorithm.support; svH !1b
'm kLCS
import org.rut.util.algorithm.SortUtil; II{&{S'HU
Qd3 j%(
/** Wg]Qlw`\|
* @author treeroot 5VU2[ \
* @since 2006-2-2 I51@QJX
* @version 1.0 NqWdRU
*/ nZYBE030
public class HeapSort implements SortUtil.Sort{ /f;~X"!
ak!G8'w
/* (non-Javadoc) KJ4.4Zq{c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P( 8OQL:
*/ Qq|57X)P*
public void sort(int[] data) { f(MO_Sj]
MaxHeap h=new MaxHeap(); @|YH|/RF
h.init(data); YT(AUS5n
for(int i=0;i h.remove(); BLD gt~h#
System.arraycopy(h.queue,1,data,0,data.length); 9p(.A$
} +TDw+
6qnzBA7
private static class MaxHeap{ c9h6C
Wvf ^N(
void init(int[] data){ oYH-wQj
this.queue=new int[data.length+1]; cSV aI
for(int i=0;i queue[++size]=data; DN:EB@
fixUp(size); \ }G>8^
} #S"nF@
} *gWwALGo5
$-sHWYZ
private int size=0; @E|}Y
YNi.SXH
private int[] queue; 5$C-9
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public int get() { Btcy)LRk
return queue[1]; /IMFO:c
} ~b8]H|<'Y
?$4 PVI}
public void remove() { 9djk[ttA)
SortUtil.swap(queue,1,size--); -(H0>Ap
fixDown(1); %1+4_g9
} (SAs-
file://fixdown [d]9Oa4
private void fixDown(int k) { 3h`f6
int j; $~T4hv :
while ((j = k << 1) <= size) { <wD-qTW
if (j < size %26amp;%26amp; queue[j] j++; [/8%3
if (queue[k]>queue[j]) file://不用交换 nAdf=D'P
break; $f7l34Sf3
SortUtil.swap(queue,j,k); (n_/`dP
k = j; 'TB2:W3
} z~s PXGb
} fe_5LC"
private void fixUp(int k) { X#^[<5
while (k > 1) { LZxNAua
int j = k >> 1; tc_3sC7jN
if (queue[j]>queue[k]) - 1gVeT&
break; .(k|wX[Fu~
SortUtil.swap(queue,j,k); %d9uTm;
k = j; eTcd"Kd/
} S3Jo>jXS "
} @`9]F7h5W
wN~_v-~*Q
} .HABNPNg(
:gFx{*xN/9
} uW %#
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SortUtil： KF:78C
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package org.rut.util.algorithm; inp7K41
bW(0Ng
import org.rut.util.algorithm.support.BubbleSort; 4;2uW#dG"
import org.rut.util.algorithm.support.HeapSort; FGBbO\</
import org.rut.util.algorithm.support.ImprovedMergeSort; Yrq~5)%
import org.rut.util.algorithm.support.ImprovedQuickSort; PLBrP
import org.rut.util.algorithm.support.InsertSort; O*P.]d
import org.rut.util.algorithm.support.MergeSort; 5*u+q2\F
import org.rut.util.algorithm.support.QuickSort; xr^LFn)
import org.rut.util.algorithm.support.SelectionSort; E|shs=I
import org.rut.util.algorithm.support.ShellSort; 8P\Zo8}v
W ]8QM1$
/** j8:\%|
* @author treeroot J\=*#*rJ1
* @since 2006-2-2 kvu)y`
* @version 1.0 ((%?`y
*/ P?P#RhvA1
public class SortUtil { )MT}+ai
public final static int INSERT = 1; @gK?\URoT
public final static int BUBBLE = 2; R2vlFx/
public final static int SELECTION = 3; -X6PRE5a2
public final static int SHELL = 4; 5~DJWi,
public final static int QUICK = 5; Xne1gms
public final static int IMPROVED_QUICK = 6; dft!lBN
public final static int MERGE = 7; BDQsP$'6QT
public final static int IMPROVED_MERGE = 8; /Z}}(6T
public final static int HEAP = 9; +D*Z_Yh6
>9Vn.S
public static void sort(int[] data) { o}p n0KO,
sort(data, IMPROVED_QUICK); ,zY{
} xxQ;xI0+]
private static String[] name={ -jmY)(\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zX i'kB
}; p0eX{xm
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private static Sort[] impl=new Sort[]{ |-~Y#]
new InsertSort(), Pr C{'XDlU
new BubbleSort(), a(ZcmYzXU
new SelectionSort(), {Qj~M<@3
new ShellSort(), @oGcuE
new QuickSort(), 0#gK6o!
new ImprovedQuickSort(), :7;@ZEe
new MergeSort(), H3oFORh
new ImprovedMergeSort(), "_?nN"A7
new HeapSort() pEz_qy[#
}; w_VP J
9%obq/Lb
public static String toString(int algorithm){ ;8 lfOMf
return name[algorithm-1]; vW@=<aS Z
} Y8t8!{ytg
?:9"X$XR
public static void sort(int[] data, int algorithm) { 8zq=N#x
impl[algorithm-1].sort(data); [{/jI\?v
} #,'kXj
lH~[f
public static interface Sort { *lJxH8\
public void sort(int[] data); J]r^W)O
} I)HPO,7
.*Qx\,
public static void swap(int[] data, int i, int j) { >^{yF~(
int temp = data; j_j]"ew)
data = data[j]; j B{8u&kz)
data[j] = temp; >=w)x,0yX
} 9+!hg'9Qn
} :[d9tm