[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; 6H6Law!)
} v$JLDt_
int i1=l; @Z=wE3T@
int i2=mid+1; /hfUPO5
for(int cur=l;cur<=r;cur++){ wiBuEaUkW
if(i1==mid+1) fM9xy \.
data[cur]=temp[i2++]; \>;%Ji
else if(i2>r) &E]"c]i+
data[cur]=temp[i1++]; S~|tfJpL
else if(temp[i1] data[cur]=temp[i1++]; D2?S,9+E_
else &NP6%}bR`
data[cur]=temp[i2++]; ~*kK4]lP
} bZXlJa`'S
} 7V/Zr
HSql)iT
} |YXG(;-BS
w<mqe0
改进后的归并排序: %Y 2G
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package org.rut.util.algorithm.support; [$oM
ebD{ pc`&
import org.rut.util.algorithm.SortUtil; "Y(%oJS]D
;3 dM@>5[
/** 'yeh7oR
* @author treeroot }Oh5Nm)
* @since 2006-2-2 }M="oN~w
* @version 1.0 _[0I^o
*/ N&,"kRFFo
public class ImprovedMergeSort implements SortUtil.Sort { v<`$bvv?
sHF%=Vu
private static final int THRESHOLD = 10; R1~7F{FW
|/t K-c6J
/* ,`+Bs&S8
* (non-Javadoc) Y& m<lnB
* ^[*AK_o_DQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x;*VCs
*/ {YfYIt=.
public void sort(int[] data) { ~(M*6b
int[] temp=new int[data.length]; 5 5a@)>h
mergeSort(data,temp,0,data.length-1); 8@Q"YA3d+
} NrW[Q3E$
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private void mergeSort(int[] data, int[] temp, int l, int r) { z^"?sd
int i, j, k; zcZ^s v>
int mid = (l + r) / 2; z{AM2Z
if (l == r) "^!j5fZ
return; % ghJ*iHR
if ((mid - l) >= THRESHOLD) td%Y4-+-
mergeSort(data, temp, l, mid); A03I-^0g+
else PaA6Z":
insertSort(data, l, mid - l + 1); aTi0bQW{
if ((r - mid) > THRESHOLD) `yy%<&
mergeSort(data, temp, mid + 1, r); <'VA=orD
else /^NJ)9IB
insertSort(data, mid + 1, r - mid); x={kjym L
hgNY[,
for (i = l; i <= mid; i++) { ;A`IYRzt
temp = data; *-+C<2"
} j`Tm\!q
for (j = 1; j <= r - mid; j++) { #dL5x{gV=
temp[r - j + 1] = data[j + mid]; r';Hxa '
} I<IC-k"Y
int a = temp[l]; McO@p=M
int b = temp[r]; 9j9YQ2
for (i = l, j = r, k = l; k <= r; k++) { 5X#i65_-
if (a < b) { 7ucx6J]c
data[k] = temp[i++]; g521Wdtnn
a = temp; 1fmSk$ y.9
} else { T %$2k>
data[k] = temp[j--]; @^BS#
b = temp[j]; $HP/cKu
} 5^bh.uF
} 3KB|NS
} V,`!rJ
`e4o1*
/** ZE{aS4c
* @param data dVij <! Lu
* @param l r{bgTG
* @param i jo]m12ps
*/ ,M| QN*
private void insertSort(int[] data, int start, int len) { {(8U8f<'=y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); R994R@gz
} I3V{"Nx6
} 7g{g}
} Zb12:?
} }x{rTEq
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堆排序： "FD<^
q}wl_ku9+
package org.rut.util.algorithm.support; [1t\|v
&\CJg'D:m
import org.rut.util.algorithm.SortUtil; <L[T'ZE+
ez{P-qB
/** m~A[V,os
* @author treeroot N` @W%
* @since 2006-2-2 *93l${'
* @version 1.0 U}mL,kj"
*/ Vu_7uSp,)
public class HeapSort implements SortUtil.Sort{ s{x*~M$vt
,I9][_
/* (non-Javadoc) SaX,^_GY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]{q-Y<{"
*/ x9FLr}e
public void sort(int[] data) { GqmDDL1
MaxHeap h=new MaxHeap(); y\r^\ S9%
h.init(data); &etL&s v
for(int i=0;i h.remove(); hlSB7D"d
System.arraycopy(h.queue,1,data,0,data.length); o>/uW8
} -52@%uB
\FY/eQ*07
private static class MaxHeap{ 3[00-~&U
tS_xa
void init(int[] data){ bv:0EdVr
this.queue=new int[data.length+1]; n',9#I(!L
for(int i=0;i queue[++size]=data; jWO&SWso
fixUp(size); )D6'k{6M
} sp=7Kh?|>
} u`L!za7fi
F1{?]>G
private int size=0; Mdy0!{d
S?,KgMVM
private int[] queue; [FeJ8P>z
mlsvP%[f.
public int get() { gavQb3EP
return queue[1]; p3,(*eZ
} n;S0fg
L:k@BCQM
public void remove() { 7>W+Uq
SortUtil.swap(queue,1,size--); 9}'l=b:Jms
fixDown(1); WNF=NNO-R
} W_e-7=6
file://fixdown "W,"qFx
private void fixDown(int k) { z$8e6*
int j; ZPxOds1m
while ((j = k << 1) <= size) { 1A)wbH)
if (j < size %26amp;%26amp; queue[j] j++; kcma/d
if (queue[k]>queue[j]) file://不用交换 8`rAE_n`%
break; ino7!T`
SortUtil.swap(queue,j,k); 5sA>O2Rt>
k = j; {3F}Slb
} Muc*?wB`
} V;[__w
private void fixUp(int k) { mTb2d?NS
while (k > 1) { w'5dk3$"
int j = k >> 1; CwH)6uA
if (queue[j]>queue[k]) O)=73e\
break; |~=?vw<W
SortUtil.swap(queue,j,k); VQG /g\
k = j; q6m87O9
} JJbM)B@-
} W:;`
2\iD;Z#gM
} v0H>iKh7
1VPN#Q!
} Tg{dIh.Q~O
u}@%70A
SortUtil： c-3YSrY
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package org.rut.util.algorithm; =vqE=:X6
&s6(3k
import org.rut.util.algorithm.support.BubbleSort; :+Z>nHe
import org.rut.util.algorithm.support.HeapSort; Vqv2F @.
import org.rut.util.algorithm.support.ImprovedMergeSort; DY+8m8!4H
import org.rut.util.algorithm.support.ImprovedQuickSort; e) /u>I
import org.rut.util.algorithm.support.InsertSort; !z4Hj{A_
import org.rut.util.algorithm.support.MergeSort; +2k|g2
import org.rut.util.algorithm.support.QuickSort; D.oS8'
import org.rut.util.algorithm.support.SelectionSort; R(7X}*@X
import org.rut.util.algorithm.support.ShellSort; !~$YD*"S
Ik@Q@ T"
/** gYH:EuY,
* @author treeroot vI:bl~
* @since 2006-2-2 ,{mf+ 3&$,
* @version 1.0 w3]0 !)t1
*/ RZ,<D I
public class SortUtil { i5~ /+~
public final static int INSERT = 1; &oK/]lub
public final static int BUBBLE = 2; R^Eu}?<f
public final static int SELECTION = 3; +D{*L0$D"
public final static int SHELL = 4; xzGsfd
public final static int QUICK = 5; 48"Y-TV
public final static int IMPROVED_QUICK = 6; exrt|A]_[
public final static int MERGE = 7; )1tnZ=&
public final static int IMPROVED_MERGE = 8; 3K'o&>}L
public final static int HEAP = 9; me}Gb a
C{I8Pio{b
public static void sort(int[] data) { ,*}g r
sort(data, IMPROVED_QUICK); w$_'xX(
} E*!zJ,@8
private static String[] name={ *IO;`k q,;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K&gc5L
}; JXR/K=<^
L!}j3(I
private static Sort[] impl=new Sort[]{ ?\p%Mx?
new InsertSort(), /o06hy
new BubbleSort(), LXLIos55S
new SelectionSort(), EA@$^e[
new ShellSort(), GzZ|T7fm
new QuickSort(), (Ss77~W7
new ImprovedQuickSort(), f!R^;'a
new MergeSort(), f6_|dvY3
new ImprovedMergeSort(), F*jjcUk
new HeapSort() '>WuukC
}; YvP"W/5
o!_; H}pq
public static String toString(int algorithm){ Qj~W-^/ -
return name[algorithm-1]; qu~"C,
} LXEu^F~{u#
0 c'2rx
public static void sort(int[] data, int algorithm) { s?\9i6
impl[algorithm-1].sort(data); fOjt` ~ToI
} d\<aJOi+-
#/sE{jm
public static interface Sort { 17[t_T&Ak9
public void sort(int[] data); M0IqQM57N
} X|n[9h:%
_R<V8g1f
public static void swap(int[] data, int i, int j) { uc(yos
int temp = data; \S@=zII_
data = data[j]; Z$=$oJzB
data[j] = temp; U@t?jTMBkO
} VEYKrZA
} uB&I56