[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; ^:nc'C gP
} jW/WG tz
int i1=l; qHtQ4_Zn;
int i2=mid+1; R!nf^*~
for(int cur=l;cur<=r;cur++){ ?u|??z%
if(i1==mid+1) ?H{[u rLn
data[cur]=temp[i2++]; N(/)e
else if(i2>r) %idBR7?`g
data[cur]=temp[i1++]; >A#5` $i
else if(temp[i1] data[cur]=temp[i1++]; &$"#hGg
else Lp`.fn8Ln
data[cur]=temp[i2++]; x`CjFaE~F
} #A63?kDE&&
} 8-$t7bV5
!oLn=
} {I#_0Q,i
,GbmL8P7Y
改进后的归并排序: b UG,~\Z
0RR|!zEu
package org.rut.util.algorithm.support; z2=bbm:
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import org.rut.util.algorithm.SortUtil; F^ q{[Z
4vhf!!1
/** MlO OB
* @author treeroot -Cf)`/
* @since 2006-2-2 }$6L]
* @version 1.0 oOFTQB_6
*/ nep#L>LP$x
public class ImprovedMergeSort implements SortUtil.Sort { ttP7-y
gt kV=V
private static final int THRESHOLD = 10; |}"YUk^
%"RJi?
/* X2w)J?pv
* (non-Javadoc) X+vKY
* I8H3*DE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^z,3#gK
*/ uU d"l,V
public void sort(int[] data) { 8NN+Z<
int[] temp=new int[data.length]; *7mlH
mergeSort(data,temp,0,data.length-1); TG2#$Bq1
} {DO9%ej)
E0HqXd?
private void mergeSort(int[] data, int[] temp, int l, int r) { o|$D|E
int i, j, k; Q3@zUjq_Q
int mid = (l + r) / 2; A l[ZU
if (l == r) wO??"${OH
return; K:Z$V
if ((mid - l) >= THRESHOLD) 7Sdo*z
mergeSort(data, temp, l, mid); A U~DbU0O
else ( eV,f
insertSort(data, l, mid - l + 1); *&U~Io"U
if ((r - mid) > THRESHOLD) *>fr'jj1$
mergeSort(data, temp, mid + 1, r); *^>" h@J
else TrI+F+;
insertSort(data, mid + 1, r - mid); R'BB-
:e<jD_.X
for (i = l; i <= mid; i++) { T"wg/mT
temp = data; mV0,T*}e
} yC' y>f`H
for (j = 1; j <= r - mid; j++) { osC?2.
temp[r - j + 1] = data[j + mid]; !gh8 Qs
} r$jWjb
int a = temp[l]; R%r bysP
int b = temp[r]; Tigw+2
for (i = l, j = r, k = l; k <= r; k++) { 6St=r)_
if (a < b) { |Xt G9A>
data[k] = temp[i++]; I~,.@{4
a = temp; RpdUR*K9x
} else { !'f7;%7s
data[k] = temp[j--]; q4ROuE|d
b = temp[j]; ~nZcA^b#DQ
} 5xH=w:
} "*vrrY
} 6w.E Sm
vCa8`m
/** 3%v)!dTa<^
* @param data Vl.,e1)6
* @param l :Cq73:1\B
* @param i NuZ2,<~9
*/ ]b-2:M
private void insertSort(int[] data, int start, int len) { )O'LE&kQ|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {f06Ki
} Gxr\a2Z&r%
} I0XJ&P%
} (/y8KG3
} zt.kNb
<4r8H-(%
堆排序： pcMzLMG<
!GOaBs
package org.rut.util.algorithm.support; 0X)vr~`
+\!.X_Ij
import org.rut.util.algorithm.SortUtil; ;"dX]":
}*fBHzNN
/** '9\cIni0
* @author treeroot v9(5HY
* @since 2006-2-2 Ejug2q
* @version 1.0 =\Q<TY
*/ *-0s `rC
public class HeapSort implements SortUtil.Sort{ 9qx4F<
Q2 q~m8(
/* (non-Javadoc) e5_Hmuk|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q-x>yau"
*/ #XQ/y}(
public void sort(int[] data) { gL<n?FG4b
MaxHeap h=new MaxHeap(); qu B[S)2}
h.init(data); %.Y5%TyP
for(int i=0;i h.remove(); 9f~qD&~
System.arraycopy(h.queue,1,data,0,data.length); fPeS;
} EP:`l
Po?MTA
private static class MaxHeap{ N+&uR!:.C
>u=
void init(int[] data){ "FHJ_$!
this.queue=new int[data.length+1]; Q,?_;,I}
for(int i=0;i queue[++size]=data; BN*:*cmUl
fixUp(size); [f+wP|NKL
} K0w}l" )A
} x`E<]z*w}
mTe3%( LD
private int size=0; "ESc^28
- 2)k!5X=
private int[] queue; pRQ7rT',v
TV{GHB!p"
public int get() { BTAbDyH5
return queue[1]; h)Y] L#R
} ~ QRjl
o z*;q]
public void remove() { gvP-doA7W
SortUtil.swap(queue,1,size--); N~/'EaO
fixDown(1); z;JV3)E
} @]qP:h.
file://fixdown =l(euBb
private void fixDown(int k) { @a9.s
int j; UL[,A+X8D
while ((j = k << 1) <= size) { j]Gn\QF
if (j < size %26amp;%26amp; queue[j] j++; !Z_+H<fi+I
if (queue[k]>queue[j]) file://不用交换 e!6yxL*[@[
break; { ^o.f
SortUtil.swap(queue,j,k); l~Jd>9DwY
k = j; !Yof%%m$;
} X>I3N?5
} U["0B8
private void fixUp(int k) { r+#{\~r7T
while (k > 1) { x2v0cR"KL
int j = k >> 1; XFWpHe_ L
if (queue[j]>queue[k]) $;5Q mKQ'
break; tW/k
SortUtil.swap(queue,j,k); EE9w^.3a
k = j; `r$7Cc$C
} ]i {yJ)i
} vW?\bH7}I
kZe<<iv
} puPI^6y%
97liSd
} dWz?`B{'
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SortUtil： jPSVVOG
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package org.rut.util.algorithm; .wNXvnWr
pU_3Z3CeE
import org.rut.util.algorithm.support.BubbleSort; $0$sM/%
import org.rut.util.algorithm.support.HeapSort; NP;W=A F
import org.rut.util.algorithm.support.ImprovedMergeSort; 0AHQ(+Ap
import org.rut.util.algorithm.support.ImprovedQuickSort; tV!?Ol
import org.rut.util.algorithm.support.InsertSort; t:2DB)
import org.rut.util.algorithm.support.MergeSort; @43psq1
import org.rut.util.algorithm.support.QuickSort; <,CrE5Pl
import org.rut.util.algorithm.support.SelectionSort; - lX4;
import org.rut.util.algorithm.support.ShellSort; VAiJL
M5{#!d}^D
/** 1.14tS-}[4
* @author treeroot w_{tS\
* @since 2006-2-2 Qvp"gut)%X
* @version 1.0 s4bV0k
*/ ROFZ*@CH<
public class SortUtil { u1meysa{0
public final static int INSERT = 1; \%<M[r=
public final static int BUBBLE = 2; }{R*pmv$bN
public final static int SELECTION = 3; NQ`D"n
public final static int SHELL = 4; ]5'$EAsuW
public final static int QUICK = 5; 8m"k3:e^
public final static int IMPROVED_QUICK = 6; ko9}?qs
public final static int MERGE = 7; "{~5QO
public final static int IMPROVED_MERGE = 8; @1CXc"IgA
public final static int HEAP = 9; C*mVM!D);!
*}\M!u{J
public static void sort(int[] data) { Et3I(X3
sort(data, IMPROVED_QUICK); d?7?tL2
} `XxnQng
private static String[] name={ &_L%wV|[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l~E~!MR
}; t"$~o:U&)
b`X''6
private static Sort[] impl=new Sort[]{ m(8Tup|
new InsertSort(), ]FCP|Jz
new BubbleSort(), rpKZ>S|7+)
new SelectionSort(), nJe}U#
new ShellSort(), i}vJI}S.$
new QuickSort(), f\_RW;y|m
new ImprovedQuickSort(), c|/HX%Y
new MergeSort(), <UGaIb
new ImprovedMergeSort(), v@zi?D K
new HeapSort() BpIyw
}; 4]r_K2.cc
H9)@q3<
public static String toString(int algorithm){ 2j+w5KvU
return name[algorithm-1]; C@XS
} }xsO^K
vIpL8B86a
public static void sort(int[] data, int algorithm) { ZR!8hw8
impl[algorithm-1].sort(data); AERJ]$\
} aDdxR:
*$=i1w
public static interface Sort { uo`R
public void sort(int[] data); yX!u&
} I/7!5Z*
t^'nh 1=
public static void swap(int[] data, int i, int j) { *?<N3Rr*
int temp = data; x^K4&'</
data = data[j]; j !*,(
data[j] = temp; [oh06_rB
} zA5nr`
} e \Qys<2r