[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; T$)N2]FE
} i^`]TOP
int i1=l; ^FJ.C|l(
int i2=mid+1; F-0|&0
for(int cur=l;cur<=r;cur++){ /a@gE^TM
if(i1==mid+1) jG~zpZh
data[cur]=temp[i2++]; !0p_s;uu,W
else if(i2>r) t|XQFb@}
data[cur]=temp[i1++]; fR]%:'2k
else if(temp[i1] data[cur]=temp[i1++]; 98O0M#|d
else vG;)(.:
data[cur]=temp[i2++]; x"7`,W
} JWzN 'a R
} D}YAu,<K
d'y\~M9(
} $w%n\t>B
57PoJ+
改进后的归并排序: [R-&5 G!x
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package org.rut.util.algorithm.support; Y367Jr@^N
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import org.rut.util.algorithm.SortUtil; (x"TM),Q
H!uB&qY
/** @-9u;aL
* @author treeroot LNm{}VJ%
* @since 2006-2-2 (rDB|kc^7
* @version 1.0 T;{M9W+
*/ c^Y&4=>T
public class ImprovedMergeSort implements SortUtil.Sort { wlvhDJ
BM6 J
private static final int THRESHOLD = 10; AiMD"7 )c
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/* B-EVo&.
* (non-Javadoc) 7NG^I6WP-
* 6@N?`6Bt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pyvZ[R9
*/ D`|.%
public void sort(int[] data) { f/!^QL{
int[] temp=new int[data.length]; &}N=a
mergeSort(data,temp,0,data.length-1); YSQB*FBz
} tp4/c'w;)J
KaRdO
private void mergeSort(int[] data, int[] temp, int l, int r) { )+!~xL
int i, j, k; /<J&ZoeJB
int mid = (l + r) / 2; qhNY<
if (l == r) S4qj}`$ Yv
return; d`M]>EDXp
if ((mid - l) >= THRESHOLD) zzq7?]D
mergeSort(data, temp, l, mid); \(m_3 H
else aDXdr\C6
insertSort(data, l, mid - l + 1); 1K<4Kz~
if ((r - mid) > THRESHOLD) kZ^}
mergeSort(data, temp, mid + 1, r); Ujw J}j
else }1N$4@
insertSort(data, mid + 1, r - mid); vO2I"Y*\
C9?R*2L>
for (i = l; i <= mid; i++) { >=<qAkk
temp = data; Q2 tM~
} HC'k81Q
for (j = 1; j <= r - mid; j++) { DBUhqRfl
temp[r - j + 1] = data[j + mid]; E Z^eEDZ
} M@LI(;
int a = temp[l]; !kzC1U
int b = temp[r]; 86.LkwlqoH
for (i = l, j = r, k = l; k <= r; k++) { xUp[)B6?:
if (a < b) { D'dE!CAUs
data[k] = temp[i++]; *TacVp
a = temp; [#}A]1N
} else { _3G;-iNX;
data[k] = temp[j--]; d~lB4
b = temp[j]; BC/oh+FW3
} %FN3/iM
} t6zc$0-j"
} B5-G.Z
bC[TLsh7{2
/** %j '_I\
* @param data >,ThIwRN
* @param l +@:$7m(V
* @param i #1>DV@^F
*/ .iDxq8l
private void insertSort(int[] data, int start, int len) { vSu|!Xb]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pt`^4}
} iti~RV,
} K2=`.
} pI__<
} l?_h(Cq<
'/Y D$*,
堆排序： OK=lp4X
8XwZJ\5
package org.rut.util.algorithm.support; "X\|!Mxh
f^ q0#+k)
import org.rut.util.algorithm.SortUtil; $6&P 69<
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/** }Pu|%\
* @author treeroot 1pT v6
* @since 2006-2-2 6CKWKc
* @version 1.0 H|E{n/g
*/ |2!!>1k
public class HeapSort implements SortUtil.Sort{ XxN=vL&m
i\4Qv"%
/* (non-Javadoc) ||{V*"+\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5kX#qT=
*/ ;g-L2(T05;
public void sort(int[] data) { m\3r<*q6
MaxHeap h=new MaxHeap(); Bl)znJ^
h.init(data); cBgdBPDa
for(int i=0;i h.remove(); R"j6 w[tn
System.arraycopy(h.queue,1,data,0,data.length); [G(}`u8w"
} fB\+.eN
AnB]f~Yjl
private static class MaxHeap{ Qv3g 4iJ
eSV_.uvsb
void init(int[] data){ [1I>Bc&o*
this.queue=new int[data.length+1]; bzz{ p1e
for(int i=0;i queue[++size]=data; ^8_`IT
fixUp(size); ) h*)_7
} (6jr}kP
} auV'`PR
Kp_L\'.I5$
private int size=0; 1P"akc
=cy;{2S'p
private int[] queue; (thDv rT@2
?DAW~+,!7o
public int get() { P'4oI0Bw
return queue[1]; S6.N)7y
} o6@Hj+,,
kR C0iTV'I
public void remove() { f8>S<:
SortUtil.swap(queue,1,size--); :z;}:+7n
fixDown(1); k\:f2%!!
} 8,E#vQ55}(
file://fixdown |]qwD,eiH,
private void fixDown(int k) { 1[QH68
int j; $VX<UK$|s
while ((j = k << 1) <= size) { P#_8$#G3
if (j < size %26amp;%26amp; queue[j] j++; B3p[A k
if (queue[k]>queue[j]) file://不用交换 j Hd<*
break; %h"+J
SortUtil.swap(queue,j,k); ^7l.!s#$b
k = j; [+=h[DC
} }v0IzGKs
} 0baq696<F
private void fixUp(int k) { T>"GH M
while (k > 1) { Ek!$Ary
int j = k >> 1; 4r@dV%:%<
if (queue[j]>queue[k]) \O]1QM94Y
break; Ov vM)?^#
SortUtil.swap(queue,j,k); >s@6rNgf
k = j; Cm4$&?
} X%S9H^9
} NXAP=y3
;l]OmcL
} |+?ABPk"
=y3gnb6
} ObDcNq/b!
C*e)UPK`
SortUtil： >R5qhVYFb
PB !\r}Q
package org.rut.util.algorithm; 'o2V}L'nG
B3 mD0
import org.rut.util.algorithm.support.BubbleSort; P7IxN)b7
import org.rut.util.algorithm.support.HeapSort; 4<`x*8` ,
import org.rut.util.algorithm.support.ImprovedMergeSort; fo"dX4%}
import org.rut.util.algorithm.support.ImprovedQuickSort; _IAvFJI
import org.rut.util.algorithm.support.InsertSort; S9sFC!s1g
import org.rut.util.algorithm.support.MergeSort; R5QSf+/T4
import org.rut.util.algorithm.support.QuickSort; l8n}&zX
import org.rut.util.algorithm.support.SelectionSort; Z%*_kk
import org.rut.util.algorithm.support.ShellSort; |?c v5l7E
|TOz{
/** $qN+BKd]3
* @author treeroot cJ 5":^O
* @since 2006-2-2 kcH?l
* @version 1.0 Z`fm;7NiVG
*/ *+p9u 1B5
public class SortUtil { W\{gBjfE
public final static int INSERT = 1; Hv>C#U
public final static int BUBBLE = 2; ^s@?\v
public final static int SELECTION = 3; ~lx5RTkp
public final static int SHELL = 4; C9-90,
public final static int QUICK = 5; S.o@95M
public final static int IMPROVED_QUICK = 6; z3IQPl^
public final static int MERGE = 7; aX=
public final static int IMPROVED_MERGE = 8; `sZ/'R6
public final static int HEAP = 9; jW6~^>S
q#v&&]N=
public static void sort(int[] data) { ~o:lh],~
sort(data, IMPROVED_QUICK); ojO<sT:by
} P |c6V
private static String[] name={ 6&% c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .tB[8Y=J
}; D7%`hU
w.qpV]9>
private static Sort[] impl=new Sort[]{ aHKv*-z-
new InsertSort(), <Bc J;X/
new BubbleSort(), OQ<|XdI$
new SelectionSort(), @DT${,.49
new ShellSort(), &6/# O
new QuickSort(), NQq$0<7.=W
new ImprovedQuickSort(), GXC:~$N
new MergeSort(), zJ42%0g
new ImprovedMergeSort(), JLT^0wBB
new HeapSort() rj"oz"
}; _20nOg`o
#vJDb |z
public static String toString(int algorithm){ [wAI;=.
return name[algorithm-1]; "}PaMR]
} D_,}lsrb
6xSdA;<+]
public static void sort(int[] data, int algorithm) { `gq@LP"o
impl[algorithm-1].sort(data); 3_(fisvx
} n!mtMPH$
be`\O
public static interface Sort { ,R=Mr}@u
public void sort(int[] data); C?Dztkz
} ~={8b
VsOn j~@
public static void swap(int[] data, int i, int j) { R9gK>}>Y
int temp = data; e7/ b@
data = data[j]; X:\r )
data[j] = temp; fZ6lnZ
} tk4~ 8
} yG?,8!/]