[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; AvS<b3EoN
} #nOS7Q#uW
int i1=l; }pzUHl>
int i2=mid+1; =5jng.
for(int cur=l;cur<=r;cur++){ ?UGA-^E1
if(i1==mid+1) bdUe,2Yin
data[cur]=temp[i2++]; $ 3/G)/A
else if(i2>r) .+ w#n<
data[cur]=temp[i1++]; |6d0,muN
else if(temp[i1] data[cur]=temp[i1++]; CtO`t5
else U:n3V
data[cur]=temp[i2++]; KPcOW#.T
} A=S_5y
} @!UuK;
]a}K%D)H
} nA#FGfZ{Ge
*$eMM*4
改进后的归并排序: ~j&#DG&L
`X06JTqf:
package org.rut.util.algorithm.support; Ur/+nL{
D|`I"N[<
import org.rut.util.algorithm.SortUtil; :QV-!
=83FCq"
/** gISG<!+X^
* @author treeroot ~T_4M
* @since 2006-2-2 MvLmEmKb}\
* @version 1.0 6pHn%yE*
*/ ~RRp5x _
public class ImprovedMergeSort implements SortUtil.Sort { g]hTz)8fF
Xj^Hy"HC^~
private static final int THRESHOLD = 10; vCB0x:/
Y%B:IeF}
/* W".: 1ov#B
* (non-Javadoc) bvK fxAih
* uFzvb0O`O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) };z[x2l^
*/ &u@<0 1=
public void sort(int[] data) { o'8`>rb
int[] temp=new int[data.length]; TNHkHR[&
mergeSort(data,temp,0,data.length-1); iksd^\]f
} X?'v FC
kDz!v?Z2+B
private void mergeSort(int[] data, int[] temp, int l, int r) { i^2yq&uT(
int i, j, k; Gidh7x
int mid = (l + r) / 2; !BocF<UE
if (l == r) (")IU{>c6
return; 9mEt**s Ur
if ((mid - l) >= THRESHOLD) ^s_BY+#
mergeSort(data, temp, l, mid); ;c!}'2>vM
else ,1}c% C*,Q
insertSort(data, l, mid - l + 1); F"k.1.
if ((r - mid) > THRESHOLD) ?Z]5 [
mergeSort(data, temp, mid + 1, r); |@a.dgz,
else /i${[1
insertSort(data, mid + 1, r - mid); ;E"TOC
tocZO
for (i = l; i <= mid; i++) { y$f{P:!"{3
temp = data; xMdbS4&!
} 3j]P\T
for (j = 1; j <= r - mid; j++) { n%M-L[n
temp[r - j + 1] = data[j + mid]; Dp5hr8bT
} bP4<q?FKcN
int a = temp[l]; 'k?%39
int b = temp[r]; =Qa*-*
for (i = l, j = r, k = l; k <= r; k++) { %SHjJCS3
if (a < b) { yt+"\d
data[k] = temp[i++]; tdl Y
a = temp; <d$L}uQwg
} else { #fy#G}c
data[k] = temp[j--]; phT|w H
b = temp[j]; /:YJ2AARY
} ] X9e|
} Fjc4[ C
} Hkcr+BQ
w A0$d
/** kFJ sB,2-
* @param data errT7&@,A
* @param l OJkiTs{
* @param i HH\6gs]u
*/ b?p_mQKtZ
private void insertSort(int[] data, int start, int len) { f^tCD'Vmi
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); IwE{Zvr
} <0Mc\wy
} 0nh;0Z
} UJqDZIvC
} vbDSNm#Yv
+, SUJ|
堆排序： ugZ-*e7
HW{si]~q
package org.rut.util.algorithm.support; D2U")g}U
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import org.rut.util.algorithm.SortUtil; $qoh0$
X"S-f;b#
/** cZ!%#Az
* @author treeroot %|6t\[gn
* @since 2006-2-2 cWd\Ki
* @version 1.0 PWwz<AI+
*/ ]w3-No
public class HeapSort implements SortUtil.Sort{ !zhg3B#p
)CYm/dk
/* (non-Javadoc) )4[Yplo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z/|oCwR
*/ M!{;:m28X!
public void sort(int[] data) { O3?3XB> <
MaxHeap h=new MaxHeap(); hU:M]O0uw
h.init(data); [@l:C\2
for(int i=0;i h.remove(); ^[7ZBmS
System.arraycopy(h.queue,1,data,0,data.length); ^x! N]
} jkPye{j
.=j]PckJO
private static class MaxHeap{ y%y F34
JAjXhk<=
void init(int[] data){ !N`$`qAK
this.queue=new int[data.length+1]; G lz0`z
for(int i=0;i queue[++size]=data; {HJzhIgCf
fixUp(size); (1 L9K;
} 4`x.d
} *r b/BZX{
x6, #Jp
private int size=0; /EN3>25"#
*1}UK9X;
private int[] queue; O#}'QZd'
i; 8""A
public int get() { -P+@n)?T6
return queue[1]; CaSoR |
} ;"*\R5a
b'D|p/)m0S
public void remove() { &a'H vQV
SortUtil.swap(queue,1,size--); 9q?\F
fixDown(1); sHk,#EsKH
} q8j W&_
file://fixdown *PXlbb
private void fixDown(int k) { )FNvtLZ
int j; '7+e!>"
while ((j = k << 1) <= size) { /[[_}\xI%
if (j < size %26amp;%26amp; queue[j] j++; rmX'Ym9#
if (queue[k]>queue[j]) file://不用交换 ]BY^.!Y
break; H nKO
SortUtil.swap(queue,j,k); uxGY/Zf
k = j; =~)J:x\F
} X+'z@xpj
} NTnjVU }
private void fixUp(int k) { Km5#$IiP;
while (k > 1) { l!U_7)s/
int j = k >> 1; Z!@<[Vo6
if (queue[j]>queue[k]) X~aD\%kC7
break; 20 j9~+
SortUtil.swap(queue,j,k); o\_@4hXf
k = j; IZ<d~ [y
} 9t 3mU:
} UStNUNCq
x@-bY
} aoLYw 9
XZ@;Tyn0,
} lJ+05\pE
=}:9y6QR.
SortUtil： Y9b|lP7!
uQ^r1 $#
package org.rut.util.algorithm; ^E)Kse.>
we6kV-L.
import org.rut.util.algorithm.support.BubbleSort; n=HId:XT
import org.rut.util.algorithm.support.HeapSort; `Qf$]Eoft
import org.rut.util.algorithm.support.ImprovedMergeSort; "bO\Wt#Mf
import org.rut.util.algorithm.support.ImprovedQuickSort; sh $mOy
import org.rut.util.algorithm.support.InsertSort; )c'5M]V
import org.rut.util.algorithm.support.MergeSort; Ca: jN0
import org.rut.util.algorithm.support.QuickSort; Tgpf0(
import org.rut.util.algorithm.support.SelectionSort; j,q8n`@
import org.rut.util.algorithm.support.ShellSort; =j%B`cJ66_
bB|UQaCl
/** c: /Wk
* @author treeroot `$IuN*
* @since 2006-2-2 `m6>r9:
* @version 1.0 LX%K*nlj
*/ J3oEN'8S
public class SortUtil { ubC(%Y_k
public final static int INSERT = 1; `yjHLg
public final static int BUBBLE = 2; ]9xuLJ)
public final static int SELECTION = 3; 6m#V=4e*
public final static int SHELL = 4; RUJkfi=$
public final static int QUICK = 5; /Iwnl
public final static int IMPROVED_QUICK = 6; ()< E?D=
public final static int MERGE = 7; RC_w 1:h
public final static int IMPROVED_MERGE = 8; OYw~I.Rq
public final static int HEAP = 9; !.\EU*)1
C2WWS(zn
public static void sort(int[] data) { $T\W'WR>
sort(data, IMPROVED_QUICK); [@!.(Hp
} D&Xh|}2A
private static String[] name={ q[6tvPfkX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _ >)+ u
}; P\;L#2n
L5%t.7B
private static Sort[] impl=new Sort[]{ j2V"w&>b}
new InsertSort(), gy|L!_1Z8
new BubbleSort(), QXXB>gOY5
new SelectionSort(), s}MD;V&0
new ShellSort(), 1Sk=;Bic
new QuickSort(), l(-We.:(
new ImprovedQuickSort(), TO&ohATp
new MergeSort(), :]EAlaB4Q
new ImprovedMergeSort(), ].W)eMC*c(
new HeapSort() wVSM\
}; =x9SvIm/tH
{H]xA3[]
public static String toString(int algorithm){ h28")c.pH=
return name[algorithm-1]; gyqM&5b
} /}G+PUk7
kA`Z#yu
public static void sort(int[] data, int algorithm) { /.Yf&2X\
impl[algorithm-1].sort(data); gB4&pPN
} iV h^;
"m*.kB)e7
public static interface Sort { \;al@yC=T
public void sort(int[] data); r)ni;aP
} cL31g_u
XCCh*qym
public static void swap(int[] data, int i, int j) { m3Mo2};?
int temp = data; 8(yZX4OH>
data = data[j]; hu?Q,[+o
data[j] = temp; z >EOQe
} tDWW 4H
} +D[|Mi