[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; k$R-#f;
} sIGMA$EK
int i1=l; S`0(*A[W*
int i2=mid+1; u|TeE\0
for(int cur=l;cur<=r;cur++){ %T%sGDCV
if(i1==mid+1) \&3+D8H>n
data[cur]=temp[i2++]; zP8lN(LA
else if(i2>r) 5x4yyb'
data[cur]=temp[i1++]; Id .nu/
else if(temp[i1] data[cur]=temp[i1++]; pJ"qu,w
else IueFx u
data[cur]=temp[i2++]; )23H1
} l'.VKh\C
} "(~^w=d:$
cf20.F{<
} 7'V@+5
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改进后的归并排序: _op}1
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package org.rut.util.algorithm.support; 9IfmW^0
X *"i6*
import org.rut.util.algorithm.SortUtil; ??vLUv
&.Qrs:U
/** {@{']Y
* @author treeroot Vaw+.sG`AP
* @since 2006-2-2 XJ| <?
* @version 1.0 {qJ1ko)$
*/ L+i=VGm0
public class ImprovedMergeSort implements SortUtil.Sort { BG]#o|KW
9-a0:bP
private static final int THRESHOLD = 10; Zt{[*~
#'szP\
/* ~-Qw.EdC
* (non-Javadoc) s8t;.^1}
* CXMLt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F/kWHVHU[
*/ #gs`#6 ,'
public void sort(int[] data) { 29] G^f>
int[] temp=new int[data.length]; e2oa($9
mergeSort(data,temp,0,data.length-1); oY3;.;'bk
} fxHH;hRfv
@:vwb\azVD
private void mergeSort(int[] data, int[] temp, int l, int r) { `kXs;T6&
int i, j, k; ]Q3ADh
int mid = (l + r) / 2; \?k'4rH
if (l == r) 0znR0%~
return; -zeG1gr3
if ((mid - l) >= THRESHOLD) Jk n>S#SZ
mergeSort(data, temp, l, mid); wE`]7mA
else p]+Pkxz]'
insertSort(data, l, mid - l + 1); >@_^fw)
if ((r - mid) > THRESHOLD) pO3SUOP
mergeSort(data, temp, mid + 1, r); 6 V=9M:
else rw JIx|(
insertSort(data, mid + 1, r - mid); SZ'R59Ee<
flbd0NB
for (i = l; i <= mid; i++) { ;$wVu|&
temp = data; !?h;wR
} bJTBjS-7
for (j = 1; j <= r - mid; j++) { iz PDd{[
temp[r - j + 1] = data[j + mid]; z$. 88^
} K Z91-
int a = temp[l]; n 0L^e
int b = temp[r]; c-6?2\]j@
for (i = l, j = r, k = l; k <= r; k++) { =X:Y,?
if (a < b) { E*K;H8}s
data[k] = temp[i++]; _A9AEi'.
a = temp; z46~@y%k
} else { xfe+n$~ c
data[k] = temp[j--]; jm/`iXnMf
b = temp[j]; `1fY)d^ZS
} e6$WQd`O
} Feq]U?
} o3P${Rq
h3 }OX{k
/** ?%[@Qb=2
* @param data BW*rIn<?G
* @param l tg4pyW<
* @param i W[e$>yK
*/ Eo]xNn/g
private void insertSort(int[] data, int start, int len) { v PG},m~-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hhc,uJ">!
} R-d:j^:f
} o]oum,Q
} y766; X:J
} lq;Pch
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堆排序： v`Oc,
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package org.rut.util.algorithm.support; 'I6i,+D/q
M%P:n/j
import org.rut.util.algorithm.SortUtil; )1`0PJoHE
-gX1-,dE
/** vV-`jsq20H
* @author treeroot Txb#C[`
* @since 2006-2-2 kUrkG80q|
* @version 1.0 j{+.tIzpq[
*/ [/41%B2
public class HeapSort implements SortUtil.Sort{ /"Uqa,{
R8Fv{7]c
/* (non-Javadoc) =MDysb&:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ],Do6 @M-
*/ P{lB50
public void sort(int[] data) { oQ[f,7u
MaxHeap h=new MaxHeap(); x7<K<k;s
h.init(data); M gi,$H
for(int i=0;i h.remove(); @Z:l62l=bE
System.arraycopy(h.queue,1,data,0,data.length); 6A+nS=
} mtcw#D
T!)(Dv8@F
private static class MaxHeap{ PIS2Ed]
-k"/X8
void init(int[] data){ P8/0H(,
this.queue=new int[data.length+1]; '3^'B03
for(int i=0;i queue[++size]=data; *_\_'@1|J)
fixUp(size); oV78Hq6
} >e5qv(y]
} U0P~
"b3"TPfK
private int size=0; ":QZy8f9%
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private int[] queue; CryBwm
LsU9 .
public int get() { t!7-DF|N
return queue[1]; ZyFjFHe+
} v_GUNRs
e^1Twz3z
public void remove() { gT6jYQ
SortUtil.swap(queue,1,size--); D_zZXbNc
fixDown(1); 5M*:}*
} Wt~BU.
file://fixdown \ta?b!Y),?
private void fixDown(int k) { JYHl,HH#z
int j; Y9XEP7
while ((j = k << 1) <= size) { L`TRJ.GaJ
if (j < size %26amp;%26amp; queue[j] j++; -=\c_\O
if (queue[k]>queue[j]) file://不用交换 j3E7zRm] \
break; LyFN.2qw
SortUtil.swap(queue,j,k); kc`Tdn
k = j; 1tFNM[R
} HY:7? <r
} tf`^v6m%]
private void fixUp(int k) { ds[|
while (k > 1) { d5:c^`
int j = k >> 1; j*r{2f4Rt
if (queue[j]>queue[k]) /hyN;.hpOO
break; *VxgARIL
SortUtil.swap(queue,j,k); i?^L/b`H
k = j; T{[=oH+
} j/?kL{B
} X$W~mQma6
fVpMx4&F
} u;2[AQ.
GC}==^1
} WdbedU~`Q
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SortUtil： a<bwzX|.
T1=fNF
package org.rut.util.algorithm; "@2-Zdrr1<
S;`A{Mow
import org.rut.util.algorithm.support.BubbleSort; Q>Yjy!.<^
import org.rut.util.algorithm.support.HeapSort; p H2Sbs:Tk
import org.rut.util.algorithm.support.ImprovedMergeSort; v):Or'$~M
import org.rut.util.algorithm.support.ImprovedQuickSort; ji0@P'^;
import org.rut.util.algorithm.support.InsertSort; Q*~]h;6\{d
import org.rut.util.algorithm.support.MergeSort; z!9-:
import org.rut.util.algorithm.support.QuickSort; >e$PP8&i_T
import org.rut.util.algorithm.support.SelectionSort; TAW/zpps$
import org.rut.util.algorithm.support.ShellSort; t;\Y{`
7WZ+T"O{I
/** ePo}y])2
* @author treeroot {9q4)R}G
* @since 2006-2-2 k~nBiV
* @version 1.0 Oxd]y1
*/ ]~3V}z,T*
public class SortUtil { -6B4sZpzD
public final static int INSERT = 1; h(EhkCf
public final static int BUBBLE = 2; %._.~V
public final static int SELECTION = 3; H"WprHe
public final static int SHELL = 4; c9h6C
public final static int QUICK = 5; Wvf ^N(
public final static int IMPROVED_QUICK = 6; C1QA)E['V
public final static int MERGE = 7; $*fMR,~t&
public final static int IMPROVED_MERGE = 8; l!u_"I8j5
public final static int HEAP = 9; 20Wg=p9L
sd|).;s}
public static void sort(int[] data) { 1p=]hC
sort(data, IMPROVED_QUICK); qY!Zt_Be6
} HN|%9{VeB
private static String[] name={ & >fQp(f
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 11;MN
}; #AQV(;r7@
/IMFO:c
private static Sort[] impl=new Sort[]{ 0n{=%Q
new InsertSort(), h~zT ydnH
new BubbleSort(), Ig>(m49d
new SelectionSort(), Er?&Y,o
new ShellSort(), r_A$DaC]
new QuickSort(), vx5Zl&6r
new ImprovedQuickSort(), ~Z'?LV<t
new MergeSort(), c{w2Gt!
new ImprovedMergeSort(), qlPT Ll
new HeapSort() 0LJv'
}; FU4L6n
'^UI,"Ti
public static String toString(int algorithm){ )lDD\J7
return name[algorithm-1]; IjnU?Bf
} g[4WzDF*
DSn_0D
public static void sort(int[] data, int algorithm) { kE1TP]|
impl[algorithm-1].sort(data); * r7rZFS
} >fQMXfoY
*\F~[
public static interface Sort { d%n-[ZL
public void sort(int[] data); X!EP$!
} 8YSAf+{FtK
:^h$AWR^f
public static void swap(int[] data, int i, int j) { -zfR)(zG
int temp = data; LZxNAua
data = data[j]; 4BpZJ~(p
data[j] = temp; "fOV^B
} s!$a\k
} :Zw2'IV