[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; jxZR%D
} b@/z^k{%
int i1=l; )$#ov-]
int i2=mid+1; ;jo,&C
for(int cur=l;cur<=r;cur++){ `:}GE@]
if(i1==mid+1) -KCm#!
data[cur]=temp[i2++]; >e>Q'g{
else if(i2>r) ) e;)9~
data[cur]=temp[i1++]; z,X ^;
else if(temp[i1] data[cur]=temp[i1++]; ^ :6v- Yx
else V[HHP_
data[cur]=temp[i2++]; {y`afuiB
} 9"I/jd0B
} eH(8T
TsfOod
} P%ev8]2
6wqq"6w
改进后的归并排序: b U-Cd
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package org.rut.util.algorithm.support; M})2y+
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import org.rut.util.algorithm.SortUtil; g(;t,Vy,I
zYbSv~)
/** (TVzYm y
* @author treeroot D?)"Z$
* @since 2006-2-2 A+iQH1C0h
* @version 1.0 eeoIf4]
*/ V`l.F"<L
public class ImprovedMergeSort implements SortUtil.Sort { v,KH2 (N
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private static final int THRESHOLD = 10; BYqDC<Fq
qCc'w8A
/* 4IG'Tm
* (non-Javadoc) <DvpqlT
* <q~&g &&+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f)({;,q
*/ uV#/Lgw{M
public void sort(int[] data) { 6HCP1`gg
int[] temp=new int[data.length]; q\x*@KQgM
mergeSort(data,temp,0,data.length-1); "qu%$L
} 15)=>=1mR.
+s V$s]U
private void mergeSort(int[] data, int[] temp, int l, int r) { R1!{,*Gy
int i, j, k; 2(\~z@g
int mid = (l + r) / 2; CGbW]D$@
if (l == r) ;E,%\<
return; H/|Mq#K
if ((mid - l) >= THRESHOLD) ${8 1~
mergeSort(data, temp, l, mid); QDzFl1\P
else $f7#p4;}(
insertSort(data, l, mid - l + 1); w5bD
if ((r - mid) > THRESHOLD) S"!nM]2L
mergeSort(data, temp, mid + 1, r); #W @6@Mv
else D`o*OlU
insertSort(data, mid + 1, r - mid); |4\.",Bg
>/.-N
for (i = l; i <= mid; i++) { =4RnXZ[P0
temp = data; )U6T]1
} $"!"=v%B
for (j = 1; j <= r - mid; j++) { *S~gF/*kP
temp[r - j + 1] = data[j + mid]; $Dxz21|P7
} h:Q*T*py
int a = temp[l]; 1Yo9Wf;vP
int b = temp[r]; eRWTuIV6
for (i = l, j = r, k = l; k <= r; k++) { PB.@G,)
if (a < b) { IR;lt 3
data[k] = temp[i++]; J-:\^uP
a = temp; ReE6h\j
} else { Q$iYhR
data[k] = temp[j--]; |O%`-2p]p
b = temp[j]; </>;PnzE
} V&-pgxf;
} l`:M/z6"
} ?dl7!I@<E<
iN %kF'&9
/** ~gNa<tg"1
* @param data @{+c6.*}
* @param l s_N?Y)lS+(
* @param i 6wYd)MDLL
*/ lM3UjR|@
private void insertSort(int[] data, int start, int len) { n-be8p)-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *r6+Vz
} puV(eG
} ytf.$P
} uLD%M av
} U]riBlg>
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堆排序： Du k v[/60
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package org.rut.util.algorithm.support; vrXUS9i.
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import org.rut.util.algorithm.SortUtil; t|0Zpp;
g""1f%U_p
/** aze}koNE
* @author treeroot UiqHUrx
* @since 2006-2-2 oyZ}JTl(Q
* @version 1.0 C:\BvPoO
*/ ~e~iCyW;S
public class HeapSort implements SortUtil.Sort{ byR|L:L
4eMNKIsvY$
/* (non-Javadoc) 9+)5#!0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aF7" 4^P
*/ 8 ;y N
public void sort(int[] data) { +Em+W#i%?
MaxHeap h=new MaxHeap(); vn}:$|r$J
h.init(data); p&/}0eL y
for(int i=0;i h.remove(); Zg"g/I.+d
System.arraycopy(h.queue,1,data,0,data.length); R=yn4>I
} `rzgC \
v_3r8My-
private static class MaxHeap{ GD<xmuo
&k*sxW'
void init(int[] data){ wWB-P6
this.queue=new int[data.length+1]; yANk(
for(int i=0;i queue[++size]=data; i1e|UR-wl
fixUp(size); Oz<{B]pEul
} ^ ry
} w~wpm7
n@<+D`[.V
private int size=0; FO#`}? R`
I&^B?"Y
private int[] queue; uO8z.
DUUQz:?{J
public int get() { _]E H~;
return queue[1]; M@ILB-H
} bq#*XCt#
pbM~T(Y8
public void remove() { N=]2vyh
SortUtil.swap(queue,1,size--); #q'J`BC
fixDown(1); atRWKsY<
} x?v/|
file://fixdown Z+!._uA
private void fixDown(int k) { %;$zR}
int j; s4uZ;
while ((j = k << 1) <= size) { `1aEV#;
if (j < size %26amp;%26amp; queue[j] j++; @2ZE8O#I
if (queue[k]>queue[j]) file://不用交换 lArYlR}
break; FGY4u4y
SortUtil.swap(queue,j,k); = s^KZV
k = j; MA1.I4dm
} ]f#1G$
} Loo48
private void fixUp(int k) { (!`TO{!6P
while (k > 1) { j#mo Vq
int j = k >> 1; 7<;87t]]
if (queue[j]>queue[k]) <RH2G
break; fgcI55&jV{
SortUtil.swap(queue,j,k); <pJeiMo
k = j; %2>ya>/M
} jI:5[. Y
} C\#E1\d
uf4C+ci
} 32j@6!
I*8i=O@0T
} 0h^&`H:
'}3@D$YiM%
SortUtil： faH113nc
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package org.rut.util.algorithm; `(NMHXgG+
Kgh@.Ir
import org.rut.util.algorithm.support.BubbleSort; zSt6q
import org.rut.util.algorithm.support.HeapSort; >(nb8T|
import org.rut.util.algorithm.support.ImprovedMergeSort; Z<+Ipj&
import org.rut.util.algorithm.support.ImprovedQuickSort; 0RmQfD>
import org.rut.util.algorithm.support.InsertSort; t:|knZq
import org.rut.util.algorithm.support.MergeSort; P(B:tg
import org.rut.util.algorithm.support.QuickSort; KtH-QQDluj
import org.rut.util.algorithm.support.SelectionSort; nHiE$Y
import org.rut.util.algorithm.support.ShellSort; $}kT)+K
Z#w@ /!"}T
/** :ZrE/3_S
* @author treeroot 8~Avg6,
* @since 2006-2-2 hI249gW9
* @version 1.0 ^W}(]jL
*/ #J&45
public class SortUtil { \H <k
public final static int INSERT = 1; Y v22,|:
public final static int BUBBLE = 2; 2rK%fV53b
public final static int SELECTION = 3; 6%'bo`S#
public final static int SHELL = 4; -UD^O*U
public final static int QUICK = 5; ipy1tXc
public final static int IMPROVED_QUICK = 6; Qry?h*p+`
public final static int MERGE = 7; Wl!|+-
public final static int IMPROVED_MERGE = 8; =^
public final static int HEAP = 9; c~j")o
!\D[lh}rL
public static void sort(int[] data) { ;oL`fQyr
sort(data, IMPROVED_QUICK); 0Bbno9Yp
} 6%N.'wf
private static String[] name={ Lckb*/jV&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lI#Ap2@
}; iBlZw%zKP
G+Gd;`4
private static Sort[] impl=new Sort[]{ -n.ltgW@
new InsertSort(), u!wR
new BubbleSort(), 9a4Xf%!F>z
new SelectionSort(), doeYc
new ShellSort(), Ci{,e%
new QuickSort(), GI:J9TS
new ImprovedQuickSort(), ~{-zj
new MergeSort(), C9+`sFau@
new ImprovedMergeSort(), `+Ko{rf+9
new HeapSort() +\r=/""DW
}; 4@|"1D3
yCk9Xc
public static String toString(int algorithm){ 7&ty!PpD
return name[algorithm-1]; A}K2"lQ#>,
} 9WE_9$<V
~cHpA;x9<^
public static void sort(int[] data, int algorithm) { !cblmF;0
impl[algorithm-1].sort(data); zT_
} BT[jD}?
<~wr;"S
public static interface Sort { 5!GL"
public void sort(int[] data); (- ]A1WQ?
} iIZDtZFF
bo>4:i
public static void swap(int[] data, int i, int j) { `|9NxF+
int temp = data; o{C7V*
data = data[j]; CJ'pZ]\G
data[j] = temp; o u%Xnk~
} Q[5j5vry
} TV^m1uC