[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; NZ8X@|N
} 8a8D0}'
int i1=l; 69:-c@L0
int i2=mid+1; IW@phKz
for(int cur=l;cur<=r;cur++){ EvY^]M_U
if(i1==mid+1) tGXH)=K
data[cur]=temp[i2++]; {(Mmv[y
else if(i2>r) >X:!Y[N
data[cur]=temp[i1++]; l:/x&=w
else if(temp[i1] data[cur]=temp[i1++]; &0G9v
else -U9C{q?h
data[cur]=temp[i2++]; %{^|Av1Uz
} k*,+ag*j
} $II~tO
(ToD u@p
} y[AB,Dd
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改进后的归并排序: $XkO\6kh
;9ChBA
package org.rut.util.algorithm.support; w"QZ7EyJ
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import org.rut.util.algorithm.SortUtil; WMWMb3
_T8S4s8q
/** OqF8KJnO;
* @author treeroot )4:]gx#cr
* @since 2006-2-2 kG}F/GN?
* @version 1.0 nf&5oE^
*/ /P]N40_@
public class ImprovedMergeSort implements SortUtil.Sort { VTyj<6Y
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private static final int THRESHOLD = 10; Lg#(?tMp,'
>w.%KVBJ
/* iAXGf V
* (non-Javadoc) \"Z\Af<
* FDGG$z?>m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9zCuVUcd$.
*/ OTJMS_IT
public void sort(int[] data) { YH^@8
int[] temp=new int[data.length]; ]A#:Uc5
mergeSort(data,temp,0,data.length-1); m^TN6/])
} pm:-E(3#
8?: 2<
private void mergeSort(int[] data, int[] temp, int l, int r) { '}bmDb*
int i, j, k; R1<$VR
int mid = (l + r) / 2; y+{)4ptg$<
if (l == r) fZ;}_wR-H
return; RQ^ \|+_
if ((mid - l) >= THRESHOLD) 5a)$:oO!
mergeSort(data, temp, l, mid); }Ujgd2(U
else FCKyKn
insertSort(data, l, mid - l + 1); #)[.Xz:U
if ((r - mid) > THRESHOLD) y}|E)
mergeSort(data, temp, mid + 1, r); A^LS^!Jz
else 7^LCP*
insertSort(data, mid + 1, r - mid); Q&^\YgkCf
y c 8h}`
for (i = l; i <= mid; i++) { SB.=x
temp = data; e+4Eiv
} ~%f$}{
for (j = 1; j <= r - mid; j++) { Km,o+9?1gF
temp[r - j + 1] = data[j + mid]; G#6Z@|kVw
} KtH^k&z.f
int a = temp[l]; 8pftc)k
int b = temp[r]; de.f?y
for (i = l, j = r, k = l; k <= r; k++) { (~E-=+R[$&
if (a < b) { oGl<i
data[k] = temp[i++]; >gM"*Laa?
a = temp; -p>1:M <
} else { c14d0x{
data[k] = temp[j--]; RO%M9LISI
b = temp[j]; )& Oxp&x
} tns8B
} T:H~Y+qnt
} U,61 3G
n"D` =
/** hN]l $Ct
* @param data 3 v.8
* @param l ~/z%yg
* @param i 0( A ?&
*/ wAX;)PLg
private void insertSort(int[] data, int start, int len) { z9g6%RbwX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mU?~s7
} sK&kp=zu
} EHn!ZrQgh
} 5Wa)_@qI)`
} =UK:83R(
Lv/}&'\(
堆排序： u;rmqo1
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package org.rut.util.algorithm.support; RxJbQs$Ph
[9Rh"H;h
import org.rut.util.algorithm.SortUtil; JJWPte/
yy8BkG(
/** K\xM%O?
* @author treeroot y|MhV/P04
* @since 2006-2-2 4To$!=
* @version 1.0 e\[q3J
*/ ((`{-y\K
public class HeapSort implements SortUtil.Sort{ e#h&Xa
%u&Vt"6m=
/* (non-Javadoc) tyW[i8)O}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O]hUOc`k
*/ ,z#D[5
public void sort(int[] data) { C}xfo}i
MaxHeap h=new MaxHeap(); P}gtJ;
h.init(data); :'ZR!w
for(int i=0;i h.remove(); 3-:^mRPJ
System.arraycopy(h.queue,1,data,0,data.length); L,#YP#O,j
} lN5PKsGl
kDmuj>D
private static class MaxHeap{ vqf}(/.D
$+44US
void init(int[] data){ = E_i
this.queue=new int[data.length+1]; Y]`=cR`/"
for(int i=0;i queue[++size]=data; FN!?o:|(
fixUp(size); *lLCH,
} URm<Ji
} H9TeMY
",gVo\^
private int size=0; j1{`}\e
}6%\/d1~ 6
private int[] queue; t-C|x)J+
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public int get() { cW0\f5[/
return queue[1]; VM<0_R24z
} F{ vT^/
ZR3,dW6S
public void remove() { 6<S-o|Xw
SortUtil.swap(queue,1,size--); R||$Rfe
fixDown(1); M61Nl)|mx&
} lc5(^~
file://fixdown Pz2Q]}(w
private void fixDown(int k) { ~gZ1*8s`
int j; [olSgq!3
while ((j = k << 1) <= size) { MH'%E^n `
if (j < size %26amp;%26amp; queue[j] j++; <eSg%6z
if (queue[k]>queue[j]) file://不用交换 =*ErN
break; LNk :PD0m
SortUtil.swap(queue,j,k); RXAE jzf
k = j; Z*q&^/N
} @]~.-(IMh
} ;rL1[qwk
private void fixUp(int k) { 5,f`5'$
while (k > 1) { !0zcS7&P
int j = k >> 1; wo(O+L/w
if (queue[j]>queue[k]) #M w70@6
break; r]\[G6mE%
SortUtil.swap(queue,j,k); JiXE{(
k = j; Z D"*fr
} o ?05bv
} $0$sDN6)x
:/][ n9J^
} 0~$9z+S
DcaKGjp
} 4pXY7+e2'
RZpjr !R
SortUtil： xE--)=<$
KV;q}EyG
package org.rut.util.algorithm; .0U[nt6
;t9_*)[
import org.rut.util.algorithm.support.BubbleSort; Px?"5g#+
import org.rut.util.algorithm.support.HeapSort; /K!f3o+
import org.rut.util.algorithm.support.ImprovedMergeSort; )eZuG S
import org.rut.util.algorithm.support.ImprovedQuickSort; -t<1A8%
import org.rut.util.algorithm.support.InsertSort; (Lz|o!>
import org.rut.util.algorithm.support.MergeSort; Xqm?@JN
import org.rut.util.algorithm.support.QuickSort; rBL2A
import org.rut.util.algorithm.support.SelectionSort; CHqi5Z/+
import org.rut.util.algorithm.support.ShellSort; ak:f4dEd
b9?Vpu`?
/** 5GJkvZtFY
* @author treeroot =<9Mv+Ry8
* @since 2006-2-2 #huh!Mn
* @version 1.0 p%bMfi*T
*/ [=cbzmX[
public class SortUtil { &*O'qOO<2
public final static int INSERT = 1; GcO:!b*YMp
public final static int BUBBLE = 2; :f7!?^;y>
public final static int SELECTION = 3; {*hGe_^
public final static int SHELL = 4; {y@8E>y5$
public final static int QUICK = 5; =$#5Ge]b
public final static int IMPROVED_QUICK = 6; kl1Q:
public final static int MERGE = 7; {GT5
public final static int IMPROVED_MERGE = 8; ea$. +
public final static int HEAP = 9; sEw ?349Bz
INk|NEX
public static void sort(int[] data) { o%lxEd r
sort(data, IMPROVED_QUICK); h'G
} wt@TR~a
private static String[] name={ ]QHZ[C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" CcV@YST?
}; K9ih(fh)
dQp>z%L)
private static Sort[] impl=new Sort[]{ vzSjfv
new InsertSort(), YT[=o}jS
new BubbleSort(), UHfE.mTjM
new SelectionSort(), G;/> N'#
new ShellSort(), +[ir7?Y.
new QuickSort(), 5HbJE'
new ImprovedQuickSort(), A`(Cuw-o
new MergeSort(), 6yYd~|T.Fl
new ImprovedMergeSort(), n?q+:P
new HeapSort() s`,g4ce`
}; {s6#h#U
rWO#h{
public static String toString(int algorithm){ !]mo.zDSW5
return name[algorithm-1]; Q9p2.!/C1
} OOnj(%g
^-~=U^2tC
public static void sort(int[] data, int algorithm) { 2|RxowXZ"
impl[algorithm-1].sort(data); 9"B;o
} U~7{q >
lQ[JA[
public static interface Sort { K'"s9b8
public void sort(int[] data); _m a;b<I/<
} gLo&~|=L-
=7:}/&
public static void swap(int[] data, int i, int j) { hlc g[Qdo*
int temp = data; %Y|AXxR
data = data[j]; m\ qR myO
data[j] = temp; Q>w)b]d~c
} wax^iL!
} @LU[po1I