[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; 3;(6tWWLT
} +$KUy>
int i1=l; Np4';H
int i2=mid+1; G3HmLz
for(int cur=l;cur<=r;cur++){ DBuvbq-
if(i1==mid+1) MS,J+'2
data[cur]=temp[i2++]; @B;2z_Y!l
else if(i2>r) kw8?:: <
data[cur]=temp[i1++]; 6b9 oSY-8
else if(temp[i1] data[cur]=temp[i1++]; / AFn8=9'^
else 58"Cn ||tF
data[cur]=temp[i2++]; 5CZii=@
} e"u=4nk
} wu5]S)?*
Pa%;[hbn
} */iD68r|-
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改进后的归并排序: P9~7GFas|
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package org.rut.util.algorithm.support; bce>DLF
$;1#gq%
import org.rut.util.algorithm.SortUtil; %./vh=5)
H]V@Q~?e
/** UPs*{m
* @author treeroot ?{W@TY@S
* @since 2006-2-2 H#IJ&w|
* @version 1.0 zc&>RM
*/ jm1f,=R
public class ImprovedMergeSort implements SortUtil.Sort { 0xbx2jlkY
8<UD#i@:C
private static final int THRESHOLD = 10; %xtTh]s
a?bSMt}
/* }W{rDc kv
* (non-Javadoc) $2Y'[Dto\
* LeBuPR$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 413,O~^
*/ 1!,xB]v1Ri
public void sort(int[] data) { 3.M<ATe^
int[] temp=new int[data.length]; :<ye:P1s
mergeSort(data,temp,0,data.length-1); {&,9Zy]"S
} m6J7)Wp
*oAv:8"iY
private void mergeSort(int[] data, int[] temp, int l, int r) { S'>(4a
int i, j, k; +cQGX5 K
int mid = (l + r) / 2; iHoQNog-!
if (l == r) tsdkpt
return; cd1M0z
if ((mid - l) >= THRESHOLD) C8qA+dri
mergeSort(data, temp, l, mid); m\>531&
else U)~?/s{v
insertSort(data, l, mid - l + 1); zPWX%1Qr
if ((r - mid) > THRESHOLD) C$o#zu q-
mergeSort(data, temp, mid + 1, r); ydo"H9NOS
else qgd#BJ=
insertSort(data, mid + 1, r - mid); R)% Jr.U
+]^6&MqO
for (i = l; i <= mid; i++) { Pt~mpRlH
temp = data; s@^(1g[w`
} f/t1@d!
for (j = 1; j <= r - mid; j++) { 2P9gS[Ub
temp[r - j + 1] = data[j + mid]; &WN#HI."]
} d;`bX+K
int a = temp[l]; InDISl]
int b = temp[r]; =Nn&$h l
for (i = l, j = r, k = l; k <= r; k++) { IXYSZ)z
if (a < b) { Fm(~Vt;%u
data[k] = temp[i++]; (R)\
a = temp; PZZTRgVc
} else { c,%9Fh?(
data[k] = temp[j--]; /fCj;8T3o
b = temp[j]; 1vlRzkd
} N1rBpt
} YEF|SEon0
} _:ypPRJ
R/8>^6
/** ("(:wYR%
* @param data >%jQw.
* @param l d#yb($HAJ
* @param i iXN"M` nhm
*/ Lc ,te1
private void insertSort(int[] data, int start, int len) { S-{3'D[Nj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); F3*]3,&L
} Q+(}nz4
} 0{bGVLp
} ssVO+ T
} Qhlgu!
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堆排序： MQc|j'vEY
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package org.rut.util.algorithm.support; 19a/E1
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import org.rut.util.algorithm.SortUtil; ({=: N
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/** LX{[9
* @author treeroot a1]@&Dr
* @since 2006-2-2 A<ca9g3
* @version 1.0 6.? Ke8iC
*/ dKyJ.p
public class HeapSort implements SortUtil.Sort{ MONfA;64/
4%wP}Zj#
/* (non-Javadoc) My'u('Q%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~_C[~-
*/ S#+Dfa`8X
public void sort(int[] data) { kL;sA'I:S
MaxHeap h=new MaxHeap(); [4uTp[U!r
h.init(data); <4,hrx&.
for(int i=0;i h.remove(); ,4$ZB(\
System.arraycopy(h.queue,1,data,0,data.length); L{fKZ
} r )8[LN-
`I+G7KK
private static class MaxHeap{ vt0XCUnK
{KJ!rT
void init(int[] data){ 6 R}]RuFQ
this.queue=new int[data.length+1]; W]Z;=-CBr
for(int i=0;i queue[++size]=data; HO,z[6
fixUp(size); nG<_&h
} "&;>l<V
} a4HUP*
S]3K5Z|
private int size=0; ^Glmg}>q
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private int[] queue; ql,k5.l
(.~#bl
public int get() { bdh6ii
return queue[1]; #rSm;'%,
} 5B3S]@%
3@XkO
public void remove() { XOsPKq
SortUtil.swap(queue,1,size--); A[QUFk(
fixDown(1); 6Yw;@w\
} cVjs-Xf7D%
file://fixdown FncK#hZ.
private void fixDown(int k) { M0[7>N_
int j; |sd0fTK
while ((j = k << 1) <= size) { 94bmKV_
if (j < size %26amp;%26amp; queue[j] j++; vR$[#`X
if (queue[k]>queue[j]) file://不用交换 3!_XFV
break; 9PXG*r|D
SortUtil.swap(queue,j,k); `I|$U)'
k = j; (V2~txMh
} K=|x"6\
} &NbhQY`k
private void fixUp(int k) { GSzb
while (k > 1) { 7:7i}`O
int j = k >> 1; E^kB|; Ki
if (queue[j]>queue[k]) \"!Fw)wj
break; vmW >$P
SortUtil.swap(queue,j,k); yVQ0;h
k = j; &AR@5M u
} ? <b>2j
} l-` M 9#
y[M<x5
} 13 `Or(>U
AlP}H~|M7
} ;.$AhjqiP
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SortUtil： zu8
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package org.rut.util.algorithm; b1An2e[
\;&WF1d`ac
import org.rut.util.algorithm.support.BubbleSort; pVgzUu7
import org.rut.util.algorithm.support.HeapSort; ;a@%FWc
import org.rut.util.algorithm.support.ImprovedMergeSort; #R2wt7vE
import org.rut.util.algorithm.support.ImprovedQuickSort; iTTUyftHT
import org.rut.util.algorithm.support.InsertSort; lu~<pfg
import org.rut.util.algorithm.support.MergeSort; , y%!s27
import org.rut.util.algorithm.support.QuickSort; wrw4Uxq
import org.rut.util.algorithm.support.SelectionSort; t>nx#ErS
import org.rut.util.algorithm.support.ShellSort; 9<qAf`
[n%=2*1p
/** OV<'v%_&
* @author treeroot Q<4Sd:P`"
* @since 2006-2-2 ^0oOiZs
* @version 1.0 %K0 H?^.
*/ ;2Aqztp
public class SortUtil { $oF0[}S
public final static int INSERT = 1; DZPg|*KT
public final static int BUBBLE = 2; V~nqPh!Jc
public final static int SELECTION = 3; ^{f^%)X
public final static int SHELL = 4; 3d<Z##`{4
public final static int QUICK = 5; *F:f\9
public final static int IMPROVED_QUICK = 6; 7p"4rL
public final static int MERGE = 7; '3B"@^]
public final static int IMPROVED_MERGE = 8; ft |W
public final static int HEAP = 9; p6)Jzh_/
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public static void sort(int[] data) { )4h4ql W
sort(data, IMPROVED_QUICK); Jz"Yb
} Rr>nka)U
private static String[] name={ < cNJrer
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L\)GPTo!x
}; Y!!w*G9b
PfF5@W;E;
private static Sort[] impl=new Sort[]{ !2YvG%t^6
new InsertSort(), 3a|I| NP
new BubbleSort(), -^C^3pms
new SelectionSort(), be^+X[
new ShellSort(), -zn$h$N4
new QuickSort(), Z=c&</9e
new ImprovedQuickSort(), ),DLrGOl
new MergeSort(), {tE9m@[AF
new ImprovedMergeSort(), =;HC7TUM&
new HeapSort() Ql2zC9C
}; T#M_2qJ1=
CEQs}bz
public static String toString(int algorithm){ 3^!Y9$y1
return name[algorithm-1]; \0)v5u
} r Uau??
x-E@[=
public static void sort(int[] data, int algorithm) { =}F}XSvXH
impl[algorithm-1].sort(data); d8N{sT
} TwdY6E3`
Hl"^E*9x
public static interface Sort { eMHBY6<~=
public void sort(int[] data); $U*b;'o
} (U`<r-n\n
jWpm"C
public static void swap(int[] data, int i, int j) { _bsAF^ ;
int temp = data; UnVYGch
data = data[j]; -l(G"]tRB
data[j] = temp; CdZS"I
} g \;,NW^
} SN#Cnu}