[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; bR6bS7$
} ,f1wN{P
int i1=l; eP2 yU
int i2=mid+1; Q.|2/6hD7[
for(int cur=l;cur<=r;cur++){ {'ZnxK'
if(i1==mid+1) |-|BM'Y
data[cur]=temp[i2++]; A|&EI-In
else if(i2>r) VC+\RB#:-
data[cur]=temp[i1++]; _xC~44
else if(temp[i1] data[cur]=temp[i1++]; -12v/an]L7
else 1=D!C lcb
data[cur]=temp[i2++]; g/@CESfm'
} 67g/(4&
} PT4`1Oy}/1
=['ijD4TW
} UiSc*_N"
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改进后的归并排序: kU Flp
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package org.rut.util.algorithm.support; UEeqk"t^
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import org.rut.util.algorithm.SortUtil; j;y|Ys)I
c1<g!Q&E
/** u<8Q[_E&
* @author treeroot &qU[wn:1
* @since 2006-2-2 :U*[s$
* @version 1.0 aj,ZM,Ad
*/ C[pDPx,#:G
public class ImprovedMergeSort implements SortUtil.Sort { MQ+ek4
3edAI&a5
private static final int THRESHOLD = 10; =,'Z6?%p
@bx2=
/* h>/ViB@"W|
* (non-Javadoc) /7#&qx8
* ?4Lo"igAA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1=X=jPwO C
*/ L8G4K)
public void sort(int[] data) { 4{?x(~
int[] temp=new int[data.length]; tWiV0PTI
mergeSort(data,temp,0,data.length-1); :1=?/8h
} CQ`(,F3(
J53;w:O
private void mergeSort(int[] data, int[] temp, int l, int r) { op*+fJHD
int i, j, k; }';&0p2Z
int mid = (l + r) / 2; kT1lOP-Bg
if (l == r) -^5R51
return; >guQY I@4,
if ((mid - l) >= THRESHOLD) uM}O8N
mergeSort(data, temp, l, mid); H6O\U2+
else zaZ}:N/w(z
insertSort(data, l, mid - l + 1); @}gdOaw
if ((r - mid) > THRESHOLD) fUXp)0O
mergeSort(data, temp, mid + 1, r); GN<I|mGLJK
else 8zCAy@u
insertSort(data, mid + 1, r - mid); 3KKe4{oG
T42g4j/l~
for (i = l; i <= mid; i++) { LTe7f8A
temp = data; w(j9[
} J]0#M:w&
for (j = 1; j <= r - mid; j++) { 0- UeFy
temp[r - j + 1] = data[j + mid]; {P-PH$ E-
} a)1,/:7'
int a = temp[l]; b {5|2&=
int b = temp[r]; r2th6hl~
for (i = l, j = r, k = l; k <= r; k++) { 2z\F m/Z.
if (a < b) { b{rmxtx
data[k] = temp[i++]; RtL<hD
a = temp; ^ztf:'l@C
} else { CA4-&O"
data[k] = temp[j--]; + LwoBn>6
b = temp[j]; D$cMPFa2Nt
} *ls6#j@
} bwJi[xF
} n@Ag`}
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/** o FLrSmY)E
* @param data Z|c9%.,
* @param l Lvq]SzOw
* @param i FQFENq''B
*/ ej;taKzj
private void insertSort(int[] data, int start, int len) { pJz8e&wyLM
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {yHfE,
} L\ %_<2
} xgz87d/<:
} |^Es6 .~
} 2M?lgh4"
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堆排序： uKy*N*}
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package org.rut.util.algorithm.support; lt4jnV2"a
fn OkH
import org.rut.util.algorithm.SortUtil; d_uy;-3
*u/|NU&X
/** wIF ":'
* @author treeroot !5j3gr~
* @since 2006-2-2 >~rd5xlk
* @version 1.0 1Q SIZoK7
*/ yU"G|Ex
public class HeapSort implements SortUtil.Sort{ Ij1]GZ`A(
%j">&U.[
/* (non-Javadoc) "yTh +=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jtv Q<4
*/ ogqV]36Idh
public void sort(int[] data) { wsrx|n[]
MaxHeap h=new MaxHeap(); V|\A?
h.init(data); $>=Nb~t!/
for(int i=0;i h.remove(); DA$Q-
System.arraycopy(h.queue,1,data,0,data.length); ^Nw]'e3
} Jche79B
o%%x'uC
private static class MaxHeap{ =h::VB}Lv
sjI[Vq
void init(int[] data){ /K) b0QX
this.queue=new int[data.length+1]; yZp:hs#
for(int i=0;i queue[++size]=data; VaSNFl1_M
fixUp(size); wLSZL
} jF{gDK
} &&1Y"dFs
$|(|Qzi%
private int size=0; 4AOS}@~W
sBtG}Mo)
private int[] queue; ~'J =!Xy
LGROEn<*d
public int get() { P0ltN
return queue[1]; CQ.4,S}6'
} Y-q@~vZ]
5 ?~-Vv31s
public void remove() { "42$AaS
SortUtil.swap(queue,1,size--); o U}t'WU
fixDown(1); V-;nj,.mY
} &]6K]sWJK{
file://fixdown Kn#xY3W6
private void fixDown(int k) { CS5jJi"pD3
int j; {]\uR-a(o
while ((j = k << 1) <= size) { HwW[M[qA
if (j < size %26amp;%26amp; queue[j] j++; u45h{i-e
if (queue[k]>queue[j]) file://不用交换 o|qeh<2=x
break; qH%L"J
SortUtil.swap(queue,j,k); 5u)^FIBj
k = j; V\K m% vP
} ;D"P9b]9$
} s$>m0^
private void fixUp(int k) { :+ 9Ft>
while (k > 1) { 8U2wH
int j = k >> 1; ,eeL5V
if (queue[j]>queue[k]) Ot$cmBhw!
break; r(1pvcWY-
SortUtil.swap(queue,j,k); df4^C->:
k = j; >9tkx/J
} >\7RIy3
} ss`q{ARb
k;fnC+Y$s
} YY:iPaGO
wAYzR$i
} ]u4>;sa
j+13H+dN
SortUtil： c+b:K
DAMpR3
package org.rut.util.algorithm; VIz{}_~'s
y>7VxX0xi
import org.rut.util.algorithm.support.BubbleSort; <Xs@ \
import org.rut.util.algorithm.support.HeapSort; ?%dCU~ z
import org.rut.util.algorithm.support.ImprovedMergeSort; bpF@}#fT
import org.rut.util.algorithm.support.ImprovedQuickSort; p#;dLM/EA
import org.rut.util.algorithm.support.InsertSort; iTugvb
import org.rut.util.algorithm.support.MergeSort; <S8I"8{Mb
import org.rut.util.algorithm.support.QuickSort; *M5$ h*;v
import org.rut.util.algorithm.support.SelectionSort; 8?j&{G
import org.rut.util.algorithm.support.ShellSort; ;sL6#Go?V
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/** -wtTq ph'
* @author treeroot p*AP 'cR
* @since 2006-2-2 7o965h
* @version 1.0 >^T,U0T])
*/ |P. =
public class SortUtil { n$hqNsM
public final static int INSERT = 1; HV*:<2P%D
public final static int BUBBLE = 2; vN0L(B
public final static int SELECTION = 3; a(x.{}uG,
public final static int SHELL = 4; }uvKE|umj
public final static int QUICK = 5; &Qtp"#{
public final static int IMPROVED_QUICK = 6; f=_Bx2ub
public final static int MERGE = 7; b#Fk>j
public final static int IMPROVED_MERGE = 8; M=\d_O#;Z
public final static int HEAP = 9; (iCZz{l@~
!8 wid&
public static void sort(int[] data) { SA`J.4yn
sort(data, IMPROVED_QUICK); } `>J6y9
} ,WO%L~db
private static String[] name={ t7*G91Hoq&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $dx1[V+_
}; 6zp@#vYI
6"7:44O;G
private static Sort[] impl=new Sort[]{ (!_X:+0_
new InsertSort(), r>@ B+Xi
new BubbleSort(), 4uO @`0:x
new SelectionSort(), 2[8fFo>
new ShellSort(), de=5=>P7
new QuickSort(), U5On-T5
new ImprovedQuickSort(), =0PNHO\gl
new MergeSort(), ^B<PD]
new ImprovedMergeSort(), 5S|}:~7T
new HeapSort() (b`4&sQ<
}; |i}+t
\]f5
public static String toString(int algorithm){ mJGO)u&
return name[algorithm-1]; uHUvntr
} r|\5'ZMx
%67G]?EXB
public static void sort(int[] data, int algorithm) { r{R[[]p
impl[algorithm-1].sort(data); LM"W)S
} 'FPcAW^8
45r]wT(C
public static interface Sort { vu_>U({. T
public void sort(int[] data); =A0"0D{\
} @sB}q 6>
Qb6QXjN Q
public static void swap(int[] data, int i, int j) { u n?j
int temp = data; 1kvPiV=X>
data = data[j]; dt-Qu},8-
data[j] = temp; 0^<Skm27"
} 12:h49AP
} Y91 e1PsV