[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; '7/c7m/$X<
} W)m\q}]FYz
int i1=l; -4nSiI
int i2=mid+1; J:Ncy}AO
for(int cur=l;cur<=r;cur++){ s2iL5N|"Q
if(i1==mid+1) Q a8;MxK`
data[cur]=temp[i2++]; CxJkT2
else if(i2>r) =@0/.oSD
data[cur]=temp[i1++]; qr_:zXsob_
else if(temp[i1] data[cur]=temp[i1++]; 'AJlkLqm#>
else .z&,d&E
data[cur]=temp[i2++]; CWS&f g%o{
} ca!DZ%y
} 4Q n5Mr@<
2g:V_%
} )6 [d'2
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改进后的归并排序: v* /}s:a
`%A>{A"
package org.rut.util.algorithm.support; oBZzMTPe
)-_To&S*
import org.rut.util.algorithm.SortUtil; VLs%;|`5D
[nG@ 3n
/** oV Hh
* @author treeroot \?rBtD(
* @since 2006-2-2 Mg76v<mv<
* @version 1.0 5t-dvYgU
*/ K"U[OZC`
public class ImprovedMergeSort implements SortUtil.Sort { |}^BF%8V:
OVgx2_F
private static final int THRESHOLD = 10; 76rRF
B$@fE}
/* x;p7n2_
* (non-Javadoc) [Uw/;Kyh
* w,v~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #>@~3kGg
*/ I-?Dil3
public void sort(int[] data) { ^t#W?rxp&
int[] temp=new int[data.length]; vgvJ6$#
mergeSort(data,temp,0,data.length-1); ?ta(`+"
} l!^+Xeg~
s`Z'5J;S
private void mergeSort(int[] data, int[] temp, int l, int r) { v<c@bDZ>
int i, j, k; 5<?s86GHh'
int mid = (l + r) / 2; |'" 17c&
if (l == r) ;&v~tD7
return; ri?>@i-9=
if ((mid - l) >= THRESHOLD) uy^vQ/
mergeSort(data, temp, l, mid); "ZU CYYre
else _yJAn\
insertSort(data, l, mid - l + 1); R#0Z
if ((r - mid) > THRESHOLD) b9gezXAcd
mergeSort(data, temp, mid + 1, r); g(Dr/D
else ^~Dmb2h
insertSort(data, mid + 1, r - mid); 6I`Lszs
EA+}Rf6}
for (i = l; i <= mid; i++) { {D9m>B3"{
temp = data; rfVHPMD0
} P&0o~@`cL
for (j = 1; j <= r - mid; j++) { I"1H]@"=
temp[r - j + 1] = data[j + mid]; mcB8xE
} /9..hEq^
int a = temp[l]; NiCB.a
int b = temp[r]; !?u{2D
for (i = l, j = r, k = l; k <= r; k++) { ~gAp`Q
if (a < b) { ;mw$(ZKa#
data[k] = temp[i++]; _K5R?"H0
a = temp; C+=8?u<
} else { S"wn0B$"
data[k] = temp[j--]; .3JLa8y
b = temp[j]; t'pY~a9F
} ]&mN~$+C
} uO,9h0y0W
} E,nxv+AQ
50l!f7
/** ,-GkP>8f(
* @param data Ja@zeD)f"
* @param l wQV[ZfU^h
* @param i eumpNF%$
*/ E"l/r4*f@
private void insertSort(int[] data, int start, int len) { +.u)\'r;h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i G%h-
} y$7vJl.uS/
} 8:)W!tr
} ,fa'
} tin5.N)"z
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堆排序： <@puWm[p
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package org.rut.util.algorithm.support; {hmC=j
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import org.rut.util.algorithm.SortUtil; MY]<^/Q
6?C|pO
/** +=Q/'g
* @author treeroot D;bHX
* @since 2006-2-2 (v'#~)R_`
* @version 1.0 F^/1 u
*/ ev}ugRxt|k
public class HeapSort implements SortUtil.Sort{ &eqeQD6
*49lM;
/* (non-Javadoc) [$<\*d/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ..5rW0lr
*/ (&)PlIi7
public void sort(int[] data) { 8wXnc%
MaxHeap h=new MaxHeap(); WX9ABh&5
h.init(data); -xXz}2S4
for(int i=0;i h.remove(); :47bf<w|Y
System.arraycopy(h.queue,1,data,0,data.length); 1YrIcovi-
} ZVin+z
+6$|No
private static class MaxHeap{ aGR!T{`
"nzQ$E>?$
void init(int[] data){ 9 Y-y?Y
this.queue=new int[data.length+1]; J:!m49fF
for(int i=0;i queue[++size]=data; p!OCF]r
fixUp(size); abW[hp
} ruKm_j#J
} +=:*[JEK,U
pp2,d`01[L
private int size=0; RiPxz=kr
!)1gGXRY
private int[] queue; M:9 6QM~
{%"n[DLps
public int get() { $q iY)RE
return queue[1]; pr) `7VuKp
} ]"2;x
C2[* $ 1U
public void remove() { .EF(<JC?
SortUtil.swap(queue,1,size--); b5u8j
fixDown(1); ZgzjRa++
} I+VL~'VlS
file://fixdown BIk0n;Kz<L
private void fixDown(int k) { xRI7_8Jpyn
int j; 8?za&v
while ((j = k << 1) <= size) { RZgklEU
if (j < size %26amp;%26amp; queue[j] j++; LrGLIt`
if (queue[k]>queue[j]) file://不用交换 =sYUzYm
break; `Q@w*ta)
SortUtil.swap(queue,j,k); .T63:
k = j; 5vmc'Om
} sgGXj7
} $\w<.)"#
private void fixUp(int k) { OtVRhR3>
while (k > 1) { ]27
int j = k >> 1; )43\qIu\
if (queue[j]>queue[k]) Y_gMoo
break; @BfJb[A#
SortUtil.swap(queue,j,k); :< d.
k = j; I0qSx{K
} g5OKhL0u
} x%!Ea{s
n`Y"b&
} 0|J]EsPxu
"?X,);5S
} A5\00O~
X9-WU\?UC
SortUtil： nqFJNK]a
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package org.rut.util.algorithm; 7'~Oai~r
;J>upI
import org.rut.util.algorithm.support.BubbleSort; -91*VBrOd
import org.rut.util.algorithm.support.HeapSort; yd|roG/
import org.rut.util.algorithm.support.ImprovedMergeSort; Km)VOX[ZZ
import org.rut.util.algorithm.support.ImprovedQuickSort; L* 0$x
import org.rut.util.algorithm.support.InsertSort; a7fFp9l!
import org.rut.util.algorithm.support.MergeSort; @,:6wKMc
import org.rut.util.algorithm.support.QuickSort; \`:nmFO(9
import org.rut.util.algorithm.support.SelectionSort; AbExJ~JV\g
import org.rut.util.algorithm.support.ShellSort; sy]hMGH:3W
x_+-TC4IXn
/** k',#T932x1
* @author treeroot %4QpDt
* @since 2006-2-2 F<+!28&h
* @version 1.0 1 O?bT,"b
*/ QhJuH_f 0
public class SortUtil { B4Fuvi
public final static int INSERT = 1; J85S'cwZZ
public final static int BUBBLE = 2; 0Xw$l3@N^
public final static int SELECTION = 3; T2ZB(B D
public final static int SHELL = 4; TFAd
public final static int QUICK = 5; 3cA'9
public final static int IMPROVED_QUICK = 6; * @=ZzL
public final static int MERGE = 7; x##0s5Qn
public final static int IMPROVED_MERGE = 8; Uk'bOp
public final static int HEAP = 9; 1s_N!a
PU2^4h/[`
public static void sort(int[] data) { 0#S#v2r5
sort(data, IMPROVED_QUICK); )4e8LO
} B6yTD7
private static String[] name={ 11((b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qN"Q3mU^h*
}; "OO)m](w
jAcrXB*
private static Sort[] impl=new Sort[]{ SYd6D@^2j
new InsertSort(), xjy(f~'
new BubbleSort(), 8-PHW,1@a3
new SelectionSort(), ,gdud[&|;
new ShellSort(), rQD^O4j R
new QuickSort(), OfK>-8
new ImprovedQuickSort(), idNra#
new MergeSort(), Rz#q68
new ImprovedMergeSort(), k.ttrKy<q/
new HeapSort() Q@ Ze+IhK`
}; X5tx(}j
,(A $WT@e
public static String toString(int algorithm){ YvG=P<_xw
return name[algorithm-1]; TYKs2+S6
} 9Wv}g"KY0
(2ZkfN
public static void sort(int[] data, int algorithm) { [Qqomm.[\w
impl[algorithm-1].sort(data); 6E-AfY'<
} RuGG3"|
fgoLN\
public static interface Sort { ictV7)
public void sort(int[] data); i*((@:
} #M)+sK$H%f
]5r@`%9
public static void swap(int[] data, int i, int j) { !T#EkMM
int temp = data; 1{AK=H')
data = data[j]; jx{wOb~oO)
data[j] = temp; z*UgRLKZD
} ij,Rq`}l
} #,9s\T