[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; -xEg"dY/
} >Nqkz?67
int i1=l; ATewdq[C
int i2=mid+1; o|.me G
for(int cur=l;cur<=r;cur++){ b|'LtL$Y
if(i1==mid+1) *hgsS~
data[cur]=temp[i2++]; n{* [Y
else if(i2>r) )p](*Z^
data[cur]=temp[i1++]; OVK(:{PwS
else if(temp[i1] data[cur]=temp[i1++]; Y{{,62D
else ~a)20
data[cur]=temp[i2++]; U.)eJ1a
} u-cC}DP
} tXGcwoOB
2a}_|#*
} fP*C*4#X
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改进后的归并排序: 7cSvAX0Z.
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package org.rut.util.algorithm.support; >CA1Ub&ls
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import org.rut.util.algorithm.SortUtil; 49>yIuG
Pl ,M>IQ
/** _+7f+eB
* @author treeroot 2)H|/
* @since 2006-2-2 ^U1+D^AJ
* @version 1.0 R|yTUGY
*/ \EqO;A%<
public class ImprovedMergeSort implements SortUtil.Sort { h<jIg$rA
ku=q:ryO
private static final int THRESHOLD = 10; zy5bDL -
}0*7bb
/* a#@opUn-
* (non-Javadoc) |LhuZ_;1xo
* $x<-PN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R'_[RHFC
*/ }zLE*b,
public void sort(int[] data) { z}|'&O*.F
int[] temp=new int[data.length]; }:Akpm
mergeSort(data,temp,0,data.length-1); z#ET-[I
} |MGw$
Ds$;{wl#x
private void mergeSort(int[] data, int[] temp, int l, int r) { .4-S|]/d,
int i, j, k; 4cL=f
int mid = (l + r) / 2; JaTW/~ TU
if (l == r) S|i //I%_
return; JD.z}2+
if ((mid - l) >= THRESHOLD) kSrzIq<xre
mergeSort(data, temp, l, mid); QX/`s3N
else Y"U&3e,
insertSort(data, l, mid - l + 1); 3J{'|3x
if ((r - mid) > THRESHOLD) z5zm,Jw
mergeSort(data, temp, mid + 1, r); T!AQJ:;1
else A#{*A
insertSort(data, mid + 1, r - mid); o!N@W
L T!X|O.
for (i = l; i <= mid; i++) { p^3d1H3
temp = data; 5^i ^?
} P^r8JhDJ
for (j = 1; j <= r - mid; j++) { q1j[eru
temp[r - j + 1] = data[j + mid]; "5FeP;
} 37DvI&
int a = temp[l]; g.qp _O
int b = temp[r]; hHQt4 r'd
for (i = l, j = r, k = l; k <= r; k++) { #=c%:{O{4R
if (a < b) { \qPrY.-
data[k] = temp[i++]; \(s";@
a = temp; 3Hr%G4
} else { IbC)F> Dq
data[k] = temp[j--]; IB<ihk
b = temp[j]; g>{=R|uO5
} +-i@R%
} s4\2lBU?
} -u(#V#}OV?
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/** bT |FJ\aC
* @param data i+6/ g
* @param l USY^ [@o[f
* @param i iQQJ`
*/ q^)(p' X
private void insertSort(int[] data, int start, int len) { %\u>%s<9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c_i;'
} _`_$UMK;
} od>.5{o
} XooAL0w
} z'o+3zq^
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堆排序： 6\L,L&
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package org.rut.util.algorithm.support; .)Q'j94Q
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import org.rut.util.algorithm.SortUtil; e~1??k.;=
psBBiHB[L
/** ~EymD *
* @author treeroot =6hf'lP
* @since 2006-2-2 ^B7Aam
* @version 1.0 )deuB5kz
*/ (uE_mEIsv
public class HeapSort implements SortUtil.Sort{ U8z,N1]r*`
0&)4^->c
/* (non-Javadoc) \_oHuw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YR>xh2< 9
*/ fQ@["b
public void sort(int[] data) { o5d)v)Rx=
MaxHeap h=new MaxHeap(); pE#0949
h.init(data); & |r)pl0$
for(int i=0;i h.remove(); ;NEHbLH#F
System.arraycopy(h.queue,1,data,0,data.length); ]`x~v4JU
} l?d*g&
xK f+.6 wz
private static class MaxHeap{ gw-l]@;1
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void init(int[] data){ "&~Um U4CN
this.queue=new int[data.length+1]; wiZK-#\x
for(int i=0;i queue[++size]=data; 3i<*,@CY
fixUp(size); *Zln\Sx
} H"sey +-
} 6b0#z#E
#gP\q?5Ov
private int size=0; K(hf)1q
L))(g][;
private int[] queue; 59|Tmf(dS;
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public int get() { A-kI_&g\Og
return queue[1]; +Z+]Tqo
} 2X:n75()
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public void remove() { j`bOJTBE
SortUtil.swap(queue,1,size--); V@F~Cx
fixDown(1); n#iL[ &/Aw
} z`W$/tw"
file://fixdown ><Z2uJZ4x
private void fixDown(int k) { z>!b
int j; ?%?@?W>s@
while ((j = k << 1) <= size) { awUIYAgJ3
if (j < size %26amp;%26amp; queue[j] j++; DLVf7/=3~
if (queue[k]>queue[j]) file://不用交换 #qzozQ4
break; ^K8Ey#T
SortUtil.swap(queue,j,k); .- w*&Hd7b
k = j; e(b*T
} VrHFM(RNe
} Q%6*S!~
private void fixUp(int k) { 0YKG`W
while (k > 1) { F"_SCA?9?
int j = k >> 1; -YYQnN
if (queue[j]>queue[k]) z5?xmffB
break; U_+>4zdm
SortUtil.swap(queue,j,k); XWk^$"
k = j; Xln'~5~)
} TB9ukLG^<<
} ;Q ]bV52
[/I4Pe1Yj%
} arnu|paw
3.Y/ZWON
} 0HE@L_$;2
3*ZE``
SortUtil： ZJS7#<-7o
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package org.rut.util.algorithm; #P1k5!u
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import org.rut.util.algorithm.support.BubbleSort; (sZB-
import org.rut.util.algorithm.support.HeapSort; 6B&':N98
import org.rut.util.algorithm.support.ImprovedMergeSort; GSsot%B u"
import org.rut.util.algorithm.support.ImprovedQuickSort; ~"8b\oLW
import org.rut.util.algorithm.support.InsertSort; i-$]Tg
import org.rut.util.algorithm.support.MergeSort; 60*=Bs%b
import org.rut.util.algorithm.support.QuickSort; l%U{Unwu
import org.rut.util.algorithm.support.SelectionSort; V5m4dQ>t
import org.rut.util.algorithm.support.ShellSort; U:p<pTnMR
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/** tONxV`
* @author treeroot v]BN.SHE_
* @since 2006-2-2 `uY77co6
* @version 1.0 (c_E*>c)
*/ !fY'^Ya?
public class SortUtil { :9.ik
public final static int INSERT = 1; t!v#rn[
public final static int BUBBLE = 2; )jvYJ9s
public final static int SELECTION = 3; *?cE]U6;
public final static int SHELL = 4; .:E%cL +h
public final static int QUICK = 5; cl[rgj
public final static int IMPROVED_QUICK = 6; zl$'W=[rFs
public final static int MERGE = 7; c<|;<8ew
public final static int IMPROVED_MERGE = 8; oJEind>8O
public final static int HEAP = 9; {eL XVNR7R
46sV\In>?
public static void sort(int[] data) { aVEg%8
sort(data, IMPROVED_QUICK); ;BsyN[bF
} }Til $TT%H
private static String[] name={ x^&D8&4^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" UH2fP G
}; j8P=8w{
R!5j1hMN`
private static Sort[] impl=new Sort[]{ 6cDe_v|,
new InsertSort(), Z)?B5FF
new BubbleSort(), >yiK&LW^?
new SelectionSort(), :T.j;~
new ShellSort(), e2~&I`ct
new QuickSort(), N2WQrTA:S+
new ImprovedQuickSort(), "6o}g.
new MergeSort(), U,\3 !D0jt
new ImprovedMergeSort(), Q#i[Y?$L
new HeapSort() P`0}( '"U
}; @uXF(KDX
Yv\>\?865
public static String toString(int algorithm){ N$i!25F`
return name[algorithm-1]; yP.,Dh s
} !/2uO5
d?)k<!fJk
public static void sort(int[] data, int algorithm) { 8tJB/Pw`S
impl[algorithm-1].sort(data); 0CX2dk"UB^
} K 0R<a~
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public static interface Sort { {oOzXc6o
public void sort(int[] data); hV_bm@f/y
} 8R0Q-,'
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public static void swap(int[] data, int i, int j) { 0ZcvpR?G
int temp = data; [z=KHk
data = data[j]; sF[7pE
data[j] = temp; u 6A!Sw
} j\@Ht~G
} k/srT<