[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; c[,h|~K/_?
} 6UeYZ g
int i1=l; ;Y^'$I2fR#
int i2=mid+1; Zj_2>A
for(int cur=l;cur<=r;cur++){ m|aK_
if(i1==mid+1) 1[SG.
data[cur]=temp[i2++]; 06S R74
else if(i2>r) r\;fyeH
data[cur]=temp[i1++]; :D)(3U5
else if(temp[i1] data[cur]=temp[i1++]; xmvE*q"9]
else HYfGu1j?X
data[cur]=temp[i2++]; m[B#k$
} @vt.Db
} X@\W* nq
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} C_Ewu*T7
'k X8}bx
改进后的归并排序: H&)}Z6C"
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package org.rut.util.algorithm.support; Cd}^&z
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import org.rut.util.algorithm.SortUtil; VLez<Id9(
!#c'| *k
/** Y &Cb
* @author treeroot >[fu&r1
* @since 2006-2-2 zsg\|=P
* @version 1.0 @KQ.tF*
*/ gJ \6cZD
public class ImprovedMergeSort implements SortUtil.Sort { Tnp P'
G](4!G&
private static final int THRESHOLD = 10; gc.Lh~
#J"xByQKK
/* c1yRy|
* (non-Javadoc) UZyg_G6
* @AEH?gOX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |58HPW9
*/ !ZYPz}&N_
public void sort(int[] data) { `x[Is$
int[] temp=new int[data.length]; Ek_5% n
mergeSort(data,temp,0,data.length-1); y7,I10:D
} =SfNA F
6:ettdj
private void mergeSort(int[] data, int[] temp, int l, int r) { _=GjJ~2n
int i, j, k; $4nAb^/
int mid = (l + r) / 2; : {p'U2
if (l == r) d y HC8
return; "b} mVrFh
if ((mid - l) >= THRESHOLD) AE0uBv
mergeSort(data, temp, l, mid); ~L)~p%rbi
else yQK{ +w
insertSort(data, l, mid - l + 1); 1RRE{]2v#
if ((r - mid) > THRESHOLD) "v8p<JfB`
mergeSort(data, temp, mid + 1, r); V?uT5.B2
else @+gr/Pul^
insertSort(data, mid + 1, r - mid); J}#gTG( '
)}ev;37<C
for (i = l; i <= mid; i++) { >'*%wf[{
temp = data; 6 c_#"4
} -s3`mc}*
for (j = 1; j <= r - mid; j++) { qoO`)<
temp[r - j + 1] = data[j + mid]; 4&}%GH>}
} ytZo0pad
int a = temp[l]; kxMvOB$
int b = temp[r]; paqGW]
for (i = l, j = r, k = l; k <= r; k++) { $DY#04Je\=
if (a < b) { Jo5Bmh0
data[k] = temp[i++]; YM}a>o
a = temp; F]aoTy
} else { h?mDtMCw2
data[k] = temp[j--]; S,m(
b = temp[j]; \P<aK$g
} +A| Bc~2!
} 2S?7j[@%i`
} >,e^}K}C
}[AaI #
/** Vrt$/ d
* @param data F9fLJol
* @param l 5,"c1[`-
* @param i ,md_eGF
*/ fiGTI}=P
private void insertSort(int[] data, int start, int len) { UA>=# $
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Qs&;MW4q
} ;4nY{)bD
} >y3FU1w5d
} K10G+'H^
} daE.y_9y
;b<w'A_1
堆排序： '`>%RZ]
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package org.rut.util.algorithm.support; ~gDYb#p
&dyQ6i$],
import org.rut.util.algorithm.SortUtil; ,!#Am13
Gv-VDRS
/** /ZvP.VW&
* @author treeroot scg&"s
* @since 2006-2-2 V]7/hN-Y}
* @version 1.0 B7%K}|Qg
*/ .shi?aWm
public class HeapSort implements SortUtil.Sort{ :zY4phR
2"IV
/* (non-Javadoc) 8y LcTA$T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }]x \ `}o
*/ nLN0zfhE#
public void sort(int[] data) { HpnF,4A>
MaxHeap h=new MaxHeap(); )w7vE\n3
h.init(data); 3~>-A=
for(int i=0;i h.remove(); ,lZ19B?WP
System.arraycopy(h.queue,1,data,0,data.length); eh86-tQI~(
} CMj =4e
IMf|/a9-
private static class MaxHeap{ 8 v/H;65
tFmB`*!%
void init(int[] data){ W A/dt2D|
this.queue=new int[data.length+1]; A@A8xn%
for(int i=0;i queue[++size]=data; ;uBGB h<
fixUp(size); w1/QnV
} oD2:19M@p
} Z& _kq|
x[0T$
private int size=0; Lq(=0U\"P
wvv+~K9jq
private int[] queue; Z"`w>c.
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public int get() { >h7(kj:
return queue[1]; yE:y[k0E
} j~q 7v `":
y=Y k$:-y
public void remove() { Zxebv#4
SortUtil.swap(queue,1,size--); .n8R%|C5
fixDown(1); DQG%`-J
} GcV/_Y
file://fixdown qc8Ge\3s
private void fixDown(int k) { x3+ -wv
int j; =o#Z?Bn5
while ((j = k << 1) <= size) { \s=r[0tj!
if (j < size %26amp;%26amp; queue[j] j++; csP4Oq\g[
if (queue[k]>queue[j]) file://不用交换 A8% e_XA
break; I}`pY3
SortUtil.swap(queue,j,k); f_~T
k = j; ;hT3N UCA
} "wcaJ;Os
} +~8Lc'0aA
private void fixUp(int k) { 8zK#./0\
while (k > 1) { 'uu*DgEr
int j = k >> 1; ]IuZT
if (queue[j]>queue[k]) "~4V(
break; 5rsz2;#p
SortUtil.swap(queue,j,k); ufXWK3~\
k = j; "Bd-h|J
} N:`_Vl
} L=lSW7R
^/n1hg
} -P;3BHS$T
}U}zS@kI
} W@R7CQE@
Rw+r1vW:A
SortUtil： )tlj{ 7p
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package org.rut.util.algorithm; |8` }8vo)
ex>7f%\
import org.rut.util.algorithm.support.BubbleSort; 9\8ektq}Z
import org.rut.util.algorithm.support.HeapSort; V(ELrjB0
import org.rut.util.algorithm.support.ImprovedMergeSort; `l|Oj$
import org.rut.util.algorithm.support.ImprovedQuickSort; oCT,v0+4O
import org.rut.util.algorithm.support.InsertSort; e$9a9twl
import org.rut.util.algorithm.support.MergeSort; L^qCE-[
import org.rut.util.algorithm.support.QuickSort; w%L4O;E]*{
import org.rut.util.algorithm.support.SelectionSort; fI1CT)0<e
import org.rut.util.algorithm.support.ShellSort; A7L;ims7
[4"(\r\f
/** \uZpAV)5
* @author treeroot f ,e]jw@
* @since 2006-2-2 vHi%UaD-y
* @version 1.0 d+DO}=]
*/ vu( 5s
public class SortUtil { A@?0(
public final static int INSERT = 1; @b(@`yz.a
public final static int BUBBLE = 2; ^q-%#
public final static int SELECTION = 3; DOWWG!mx
public final static int SHELL = 4; q0ktABB
public final static int QUICK = 5; gSFZ>v*6
public final static int IMPROVED_QUICK = 6; )@!fLAT
public final static int MERGE = 7; !oH{=.w
public final static int IMPROVED_MERGE = 8; 6 IvAs-%W
public final static int HEAP = 9; -6)nQNj|
'Xik2PaO
public static void sort(int[] data) { h,\{s_b
sort(data, IMPROVED_QUICK); xP\s^]e
} #$UwJB]_D
private static String[] name={ onuG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d/ Lz"
}; 5(<O?#P
{IOc'W-C#2
private static Sort[] impl=new Sort[]{ #Us<#"fC
new InsertSort(), 4U dk#
new BubbleSort(), > TYDkEs0
new SelectionSort(), Noj*K6
new ShellSort(), nmpc<&<<
new QuickSort(), 7rD 8
new ImprovedQuickSort(), eg;r38
new MergeSort(), z}-CU GS
new ImprovedMergeSort(), gdIk%m4
new HeapSort() /Xi21W/
}; 3P!OP{`
_i>_Sn1"
public static String toString(int algorithm){ `,4yGgD!4
return name[algorithm-1]; q{h,}[U=
} 0er|QC
p@pb[Bx~[
public static void sort(int[] data, int algorithm) { +pYgh8w@
impl[algorithm-1].sort(data); w10~IP
} |47t+[b
7c\W&ZEmb-
public static interface Sort { A.*e8a/6X
public void sort(int[] data); Rxdj}xy
} g=mKTk
4}C \N
public static void swap(int[] data, int i, int j) { e (]]
int temp = data; 3?D, Wu
data = data[j]; z#gebr~_\
data[j] = temp; {N]WVp*R
} :?~)P!/xl5
} 8(`e\)%l0