[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; -Ci&h
} ^iBIp#
int i1=l; )`(]jx!
int i2=mid+1; <&3aP}
for(int cur=l;cur<=r;cur++){ ?]D))_|G
if(i1==mid+1) VH~YwO!x
data[cur]=temp[i2++]; 2IE\O8b
else if(i2>r) YvcV801Go
data[cur]=temp[i1++]; x{8h3.ZQ,
else if(temp[i1] data[cur]=temp[i1++]; 0MroHFh9`
else uoOUgNwGg
data[cur]=temp[i2++]; ^e <E/j{~
} Vs{\ YfF
} m2"e ]I
[>r0 (x&.
} :b(W&iBWhI
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改进后的归并排序: b=1E87i@W
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package org.rut.util.algorithm.support; ^r.CUhx)
L'S,=NYXY
import org.rut.util.algorithm.SortUtil; OA=~i/n~
qljsoDG
/** :UP8nq
* @author treeroot 9M3"'^ {$
* @since 2006-2-2 DpvHIE:W
* @version 1.0 d"miPR
*/ %7}j|eS)G
public class ImprovedMergeSort implements SortUtil.Sort { rD4umWi
"f_qG2A{
private static final int THRESHOLD = 10; Uavl%Q
PU,$YPrZ
/* hmd3W`8D
* (non-Javadoc) (AtyM?*
* G%: 3.:E"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kyvl>I0q@
*/ |%F,n2
public void sort(int[] data) { ;Su-Y!&%
int[] temp=new int[data.length]; W[*xr{0V
mergeSort(data,temp,0,data.length-1); H\a"=&M
} HnKgD:
0QW=2rs
private void mergeSort(int[] data, int[] temp, int l, int r) { wiZ
int i, j, k; S} OO)
int mid = (l + r) / 2; hL6;n*S=
if (l == r) ~gff{Nzk
return; o h\$u5
if ((mid - l) >= THRESHOLD) %+Ze$c}X
mergeSort(data, temp, l, mid); Iq4B%xo6G
else }.E^_`
insertSort(data, l, mid - l + 1); ,0,FzxX0!
if ((r - mid) > THRESHOLD) dH;2OWM
mergeSort(data, temp, mid + 1, r); AQ@)'
else rvy%8%e?
insertSort(data, mid + 1, r - mid); ^7gKs2M
cPuXye
for (i = l; i <= mid; i++) { vVw@^7U
temp = data; sAqy(oy#M
} T9w=k)
for (j = 1; j <= r - mid; j++) { rG6G~|mS
temp[r - j + 1] = data[j + mid]; K&`1{,
} l#1#3F
int a = temp[l]; [. 9[?8
int b = temp[r]; ?..BA&zRk
for (i = l, j = r, k = l; k <= r; k++) { 2O[sRm)
if (a < b) { Z;81"
data[k] = temp[i++]; 'xj5R=V
a = temp; l7qW)<r
} else { MkoK(m{7
data[k] = temp[j--]; r>peKo[X(
b = temp[j]; 'WE"$1
} bA#9'Qu^j
} )V2W:M
} #8"oqqYi
X1`3KqK<9
/** gh?[x.U
* @param data ,P`NtTN-
* @param l /CNsGx%%
* @param i ?@$xLUHR4
*/ .cQO?UKK
private void insertSort(int[] data, int start, int len) { Wy7w zt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G/Sp/I<d
} <n]PD;.4
} v;o1c44;
} k Alxm{
} }rfikm
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堆排序： m =b7 r
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package org.rut.util.algorithm.support; oC>J{z
Lo!hyQ)
import org.rut.util.algorithm.SortUtil; .6C/,rQ?c
3;BIwb_
/** =;uMrb4
* @author treeroot ,.QJS6Yv
* @since 2006-2-2 G5/A{1sz&
* @version 1.0 `_OrBu[
*/ 8A3/@Z;0S
public class HeapSort implements SortUtil.Sort{ #\lvzMjCC
F5 ]<=i
/* (non-Javadoc) j9[I6ko5'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $YEm(:v$
*/ J@I>m N1\
public void sort(int[] data) { F&czD;F
MaxHeap h=new MaxHeap(); :IS?si5|
h.init(data); p lnH
for(int i=0;i h.remove(); -t|/g5.w_
System.arraycopy(h.queue,1,data,0,data.length); 0d_)C>gcF
} l5Bm.H_
PO"lY'W.U
private static class MaxHeap{ 'l.tV7
)dhR&@r*w
void init(int[] data){ 9hIKx:XCg
this.queue=new int[data.length+1]; Ldz]FB|
for(int i=0;i queue[++size]=data; WDIin6u-
fixUp(size); )DXt_leLg
} fYk>LW
} 80@\e
/#Aw7F$Ey
private int size=0; ~TRC-H
/\/^= j
private int[] queue; |?^<=%
/Pg)7Zn
public int get() { r/!,((Z\
return queue[1]; n]IF`kYQV
} }Kgi!$<aQx
~o^|>]
public void remove() { d,(y$V+
SortUtil.swap(queue,1,size--); CwX?%$S
fixDown(1); G)?*BH
} ;pW8a?
file://fixdown M[mYG _{J
private void fixDown(int k) { |"SZpx
int j; +QFKaS<sn
while ((j = k << 1) <= size) { KNAvLcg
if (j < size %26amp;%26amp; queue[j] j++; dRron_'
if (queue[k]>queue[j]) file://不用交换 Jj \nye+
break; hUlRtt
SortUtil.swap(queue,j,k); _ Lh0
k = j; _C/|<Ot:
} M?h{'$T
} G7 UUx+X
private void fixUp(int k) { ['}|#3*w
while (k > 1) { $?PI>9g!
int j = k >> 1; ?l9sj]^w
if (queue[j]>queue[k]) XZ |L D#
break; :.+w'SEn4M
SortUtil.swap(queue,j,k); {:gx*4}q8
k = j; ..8t1+S6]
} #AGO~#aK
} S!8<|WO^t
J=3{<Xl
} 4P3RRS
Pw<?Dw]m
} ~DK.Y
uy<3B>3~.
SortUtil： utZI'5i
MT>sRx#
package org.rut.util.algorithm; @GKDSS4jv
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import org.rut.util.algorithm.support.BubbleSort; *B|hRZka1A
import org.rut.util.algorithm.support.HeapSort; qB$-H' j:;
import org.rut.util.algorithm.support.ImprovedMergeSort; 4@0aN6Os
import org.rut.util.algorithm.support.ImprovedQuickSort; #7O7O~
import org.rut.util.algorithm.support.InsertSort; e`4mrBtz|
import org.rut.util.algorithm.support.MergeSort; cn} CI
import org.rut.util.algorithm.support.QuickSort; 1yE',9?
import org.rut.util.algorithm.support.SelectionSort; 7T)y"PZ
import org.rut.util.algorithm.support.ShellSort; kC.dJ2^j+
mw5>[
/** W]D YfR,
* @author treeroot ^&YtZjV
* @since 2006-2-2 K:U=Y$x
* @version 1.0 b;QgL_w
*/ 'bl9fO4v
public class SortUtil { oT{9P?K8
public final static int INSERT = 1; u* pQVU
public final static int BUBBLE = 2; eQ[akVMk
public final static int SELECTION = 3; lu{ *]!
public final static int SHELL = 4; 0BC@wV
public final static int QUICK = 5; oYw?kxRZ
public final static int IMPROVED_QUICK = 6; R1LirZlzJ
public final static int MERGE = 7; `C>h]H(
public final static int IMPROVED_MERGE = 8; $=plAi
public final static int HEAP = 9; g&g:HH:
RDbNC v#
public static void sort(int[] data) { Wmd@%K
sort(data, IMPROVED_QUICK); nr]=O`Mvh
} %_E5B6xi{
private static String[] name={ 66?`7j X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ELwXp|L
}; _K#7#qp2
K7&]|^M9
private static Sort[] impl=new Sort[]{ KcV"<9rE
new InsertSort(), z#Jw?K_
new BubbleSort(), l5w^rj
new SelectionSort(), tQzbYzGb7
new ShellSort(), @M\JzV4 A[
new QuickSort(), C,W@C
new ImprovedQuickSort(), c:K/0zY
new MergeSort(), OG<*&V
new ImprovedMergeSort(), DL,R~
new HeapSort() $HQ~I?r{Hf
}; Q I";[
wBpt W2jA
public static String toString(int algorithm){ : _Y^o
return name[algorithm-1]; \xS X'/G
} h:pgN,W}
PNAvT$0LaZ
public static void sort(int[] data, int algorithm) { rmw}Ui"
impl[algorithm-1].sort(data); 2Di~}*9&
} ByjfPb#
]B(}^N>WH
public static interface Sort { l#cVQ_^"
public void sort(int[] data); Kc]cJ`P4.
} mdL T7
? /!Fv/
public static void swap(int[] data, int i, int j) { |E K6txRb
int temp = data; RbUir185Y
data = data[j]; +DSbr5"VlB
data[j] = temp; )q'dX+4=eL
} wrJQkven-
} ^kNVQJiZyG