[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; v Z]j%c@
} 4o}{3! m
int i1=l; bX2BEa8<"
int i2=mid+1; `D%i`"~Lf&
for(int cur=l;cur<=r;cur++){ 129\H< m
if(i1==mid+1) .Qrpz^wdt
data[cur]=temp[i2++]; 3;L$&X2
else if(i2>r) gamB]FPZ
data[cur]=temp[i1++]; s\mA3t
else if(temp[i1] data[cur]=temp[i1++]; 8:& !F`o
else :dW\Q&iW
data[cur]=temp[i2++]; LA;f,CQ
} 2!-Q!c`y
} `W1uU=c
KMi$0+
} GwF8ze+cH
[;ZCq!)>
改进后的归并排序: s]99'Q",
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package org.rut.util.algorithm.support; lU!_V%n
`_cv& "K9f
import org.rut.util.algorithm.SortUtil; WS[Z[O
RI8*'~ix]
/** {g nl6+j
* @author treeroot !$l<'K$
* @since 2006-2-2 Brxnl,%\
* @version 1.0 5!A:xV]6]
*/ k9*UBx
public class ImprovedMergeSort implements SortUtil.Sort { Fb1<Ic#
VX&g[5zr
private static final int THRESHOLD = 10; 6Tmz!E0
9 RDs`>v
/* {v'eP[
* (non-Javadoc) EpF9&)
* z$^wCd:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X% 05[N
*/ <J%Z?3@T
public void sort(int[] data) { Kkq-x'gt^
int[] temp=new int[data.length]; Y$v d@Q
mergeSort(data,temp,0,data.length-1); h^rG5Q
} @cIYS%iZ
T&[6
private void mergeSort(int[] data, int[] temp, int l, int r) { mQ1
int i, j, k; TXM/+sd
int mid = (l + r) / 2; ]a/dvj}
if (l == r) 5xr>B7MRM?
return; hkl0N%[
if ((mid - l) >= THRESHOLD) rrfJs
mergeSort(data, temp, l, mid); 1y:fH4V
else T+T)~!{%
insertSort(data, l, mid - l + 1); F1BvDplQ>G
if ((r - mid) > THRESHOLD) wowf1j-
mergeSort(data, temp, mid + 1, r); 8B-PsS|'
else EE]xZz>o
insertSort(data, mid + 1, r - mid); KJJ:fG8'
{wM<i
for (i = l; i <= mid; i++) { XE_Lz2H`
temp = data; EXeV@kg
} yg8=G vO
for (j = 1; j <= r - mid; j++) { }JtcAuQt
temp[r - j + 1] = data[j + mid]; Z{vc6oj
} O-7)"
int a = temp[l]; TI8\qIW
int b = temp[r]; 5yt=~
for (i = l, j = r, k = l; k <= r; k++) { i Ehc<
if (a < b) { [ p,]/ ^ N
data[k] = temp[i++]; |e!Y C iU
a = temp; #tg\ bb
} else { OMk3\FV2Z
data[k] = temp[j--]; 8Y8bFWuc
b = temp[j]; g~-IT&O
} >k\p%{P
} }ACg#;>/+
} X,+a 6F
qQ]fM$!
/** tYTl-c
* @param data \3ydNgl
* @param l aJv+BX_,
* @param i 0.+Eo.AX4M
*/ r{?qvl!q
private void insertSort(int[] data, int start, int len) { 0;LF>+fJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XSof{:V
} xKBi".wA
} JtSwbdN
} W2-l_{
} A?04,l]y
v(Kj6'
堆排序： 0= bXL!]
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package org.rut.util.algorithm.support; 7./-|#
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import org.rut.util.algorithm.SortUtil; +cXi|Zf
8h)7K/!\
/** mI<sf?.
* @author treeroot 2?LPr
* @since 2006-2-2 :mDOqlXW/
* @version 1.0 4/{pz$
*/ OH`zeI,[*
public class HeapSort implements SortUtil.Sort{ {~]5QKg.
l#C<bDw
/* (non-Javadoc) 1F>8#+B/W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @Oz3A<M
*/ P=}dR&gk'
public void sort(int[] data) { !/H `
MaxHeap h=new MaxHeap(); =?4[:#Rh
h.init(data); ]O:u9If
for(int i=0;i h.remove(); }s?w-u+(c6
System.arraycopy(h.queue,1,data,0,data.length); ?/T=Gk
} a{e 2*V
Ar~<l2,{r
private static class MaxHeap{ \H>Psv{
#]^C(qmb:
void init(int[] data){ ~G8l1dD
this.queue=new int[data.length+1]; s+_8U}R
for(int i=0;i queue[++size]=data; J*K=tA
fixUp(size); qYVeFSS
} lmUCrs37
} 5`&@3 m9/
4`o0?_.'
private int size=0; vq9O|E3
~C>;0a;<:
private int[] queue; `K@N\VM
lxZ9y
public int get() { {4SaSv^/
return queue[1]; z^*g2J,
} }+S~Ah?(
*!%n`BR '
public void remove() { sRBfLN2C
SortUtil.swap(queue,1,size--); :{S@KsPqE
fixDown(1); .K-d
} 7Q'u>o
file://fixdown p;7wH\c
private void fixDown(int k) { %AqI'ObC
int j; 7s%1?$B
while ((j = k << 1) <= size) { vMX\q
if (j < size %26amp;%26amp; queue[j] j++; ~mvv :u
if (queue[k]>queue[j]) file://不用交换 n(LO`{
break; [vuikJP>1k
SortUtil.swap(queue,j,k); im+g|9@%
k = j; H_S"4ISS_
} }jce5E
} ^wSGrV'
private void fixUp(int k) { -/B*\X[
while (k > 1) { I4ZbMnO
int j = k >> 1; 6^jrv [d
if (queue[j]>queue[k]) ;D-k\kv
break; Omn$O>
SortUtil.swap(queue,j,k); 3HR)H-@6@7
k = j; +3AX1o%p,#
} QTF1~A\
} -f:PgBj
GHLFn~z@XJ
} L{;Q6_m
BuAzO>=
} !jEV75
QCDica `+*
SortUtil： * #z@b
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package org.rut.util.algorithm; T^+K`U
*j<#5=l
import org.rut.util.algorithm.support.BubbleSort; U+ Yu_=o{
import org.rut.util.algorithm.support.HeapSort; 6 3PV R"
import org.rut.util.algorithm.support.ImprovedMergeSort; ;InMgo,
import org.rut.util.algorithm.support.ImprovedQuickSort; &'DR`e O)
import org.rut.util.algorithm.support.InsertSort; D8B\F5..c#
import org.rut.util.algorithm.support.MergeSort; ]RadwH"0!
import org.rut.util.algorithm.support.QuickSort; >D##94PZ
import org.rut.util.algorithm.support.SelectionSort; h<'tQGC
import org.rut.util.algorithm.support.ShellSort; Kx[+$Qt
)B-[Q#*A-
/** #@V<{/;49
* @author treeroot e50xcf1u
* @since 2006-2-2 8eh3K8tL#
* @version 1.0 yO\bVu5V
*/ #jxPh!%9
public class SortUtil { J.g6<n
public final static int INSERT = 1; x6\VIP"9L
public final static int BUBBLE = 2; v13\y^t
public final static int SELECTION = 3; Mw+ l>92
public final static int SHELL = 4; 6_rgRo&
public final static int QUICK = 5; JX>`N5s
public final static int IMPROVED_QUICK = 6; $%&OaAg
public final static int MERGE = 7; {pre|r\
public final static int IMPROVED_MERGE = 8; (B@\Dw8^
public final static int HEAP = 9; Y)(w&E>1
-!T24/l
public static void sort(int[] data) { nnu#rtvZp}
sort(data, IMPROVED_QUICK); 6&LmR75C
} XdlA)0S)
private static String[] name={ +#UawYLJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [z_ztK1
}; (bNoe(<qU
\Q|,0`
private static Sort[] impl=new Sort[]{ 9,tk
new InsertSort(), cuf]-C1_
new BubbleSort(), +uNMyVH
new SelectionSort(), 6>&(OV
new ShellSort(), bq5we*"V
new QuickSort(), +>Y]1IlI
new ImprovedQuickSort(), By*YBZ
new MergeSort(), K-c>J uv&,
new ImprovedMergeSort(), 3:sx%Ci/2
new HeapSort() @b5$WKPX
}; Y@Ry oJ
t!FC)iY
public static String toString(int algorithm){ DbR!s1ux
return name[algorithm-1]; <ZO+e*4
} FKf2Q&2I
x>4p6H{]0'
public static void sort(int[] data, int algorithm) { 3RlNEc%)
impl[algorithm-1].sort(data); ]haQ#e}WH
} '['x'G50
vQoZk,
public static interface Sort { 931GJA~g
public void sort(int[] data); o~xGE6A*"
} d,'gh4C
J-klpr#
public static void swap(int[] data, int i, int j) { x],XiSyp
int temp = data; BoARM{m
data = data[j]; 80gOh:
data[j] = temp; yS?5&oMl
} ET*:iioP
} GJ?J6@|