[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; >p])it[q&$
} y^Vw`-e
int i1=l; 'R9g7,53R
int i2=mid+1; 'PlaMOy
for(int cur=l;cur<=r;cur++){ U>S`k6
if(i1==mid+1) RGD]8mw
data[cur]=temp[i2++]; _2hXa!yO
else if(i2>r) sk2%
data[cur]=temp[i1++]; y69J%/c ra
else if(temp[i1] data[cur]=temp[i1++]; rS*$rQCr=
else yPu4T6Vv
data[cur]=temp[i2++]; !EF(*~r!9L
} (LJ@SeM;
} m@rSz
7Bz*r0 9S
} ] c}91
uXQ >WI@eF
改进后的归并排序: uH\kQ9f
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package org.rut.util.algorithm.support; VjbG(nB?_
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import org.rut.util.algorithm.SortUtil; nhdTTap&9
Ulqh@CE)
/** :DkAQ-<~
* @author treeroot -NM0LTF
* @since 2006-2-2 O.k\]'
* @version 1.0 vz`@x45K
*/ Vm8D"I5i
public class ImprovedMergeSort implements SortUtil.Sort { :#="%
(:\LWJX0=
private static final int THRESHOLD = 10; +=cam/A
zW4O4b$T
/* .Gb+\E{M
* (non-Javadoc) mog9jw
* gs`^~iD]m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ARL
*/ h(xP_Svj>
public void sort(int[] data) { -!*p*3|03|
int[] temp=new int[data.length]; zp=!8Av
mergeSort(data,temp,0,data.length-1); ,EhVSrh)_4
} BSXdvI1y
bY#;E;'7
private void mergeSort(int[] data, int[] temp, int l, int r) { :d'65KMi
int i, j, k; pZ+j[!
int mid = (l + r) / 2; PHR#>ZD
if (l == r) aIGn9:\
return; Uh6mGLz*&
if ((mid - l) >= THRESHOLD) QjukK6#W
mergeSort(data, temp, l, mid); W7!.#b(hU
else 0#|7U_n
insertSort(data, l, mid - l + 1); zW'/2W.
if ((r - mid) > THRESHOLD) V;*pL1
mergeSort(data, temp, mid + 1, r); hhq$g{+[
else e`DsP8-&v
insertSort(data, mid + 1, r - mid); irFc}.dI
c2b6B.4
for (i = l; i <= mid; i++) { G:Hj;&'2
temp = data; Hptq,~_t
} _'*DT=H'U
for (j = 1; j <= r - mid; j++) { URw!7bTz
temp[r - j + 1] = data[j + mid]; mq`5w)S)\o
} Z% Z"VoxH
int a = temp[l]; 3bH5C3(u
int b = temp[r]; iwz` x
for (i = l, j = r, k = l; k <= r; k++) { lV7IHX1P
if (a < b) { >)%#V<{<
data[k] = temp[i++]; FuMq|S
a = temp; RdkU2Y}V
} else { pYGYy'%A'
data[k] = temp[j--]; -M`D>
b = temp[j]; jlRS:$|R0
} 1E^{B8cm
} D5[VK`4Z
} |M _%QM.
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/** v|y<_Ya
* @param data ):}Fu
* @param l x#o?>5Qg?
* @param i b.6ZfB,+G
*/ y"Ihr5S\
private void insertSort(int[] data, int start, int len) { ?k w/S4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |)';CBb
} vu>YH)N_h
} u mqKFM$
} 9g+UJ\u^
} MyM+C}
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堆排序： J2Y 3er
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package org.rut.util.algorithm.support; 7zi"caY
_H/67dcz,
import org.rut.util.algorithm.SortUtil; Cl-S=q@>V
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/** be_C>v
* @author treeroot XzN-slu!
* @since 2006-2-2 S--/<a2
* @version 1.0 y 2cL2c$BT
*/ O'@m4@L
public class HeapSort implements SortUtil.Sort{ d{iL?>'?^
}Olr
/* (non-Javadoc) D@}St:m}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w64.R4e
*/ K]%N-F>r
public void sort(int[] data) { *u<rU,C8
MaxHeap h=new MaxHeap(); .O;!W<Ef$
h.init(data); {rtM%%l
for(int i=0;i h.remove(); $:PF9pY(
System.arraycopy(h.queue,1,data,0,data.length); Gmqs`{tc
} n=;';(wR[
(q~R5)D
private static class MaxHeap{ D l4d'&!
kT>r<`rt
void init(int[] data){ <!$dp9y.
this.queue=new int[data.length+1]; mL8A2>Gig
for(int i=0;i queue[++size]=data; 3j]UEA^
fixUp(size); Y1m}@k,+M
} :Pj W:]
} y*y`t6D
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private int size=0; Bm65W
7W6eiUI'
private int[] queue; u-8X$aJ
l6',
public int get() { L`<T'3G
return queue[1]; }C_G0'"F
} / c4;3>IS
Wg}B@:`T
public void remove() { bbfDt^
SortUtil.swap(queue,1,size--); "$`wk
fixDown(1); fF8a 1XV
} UY?i E=
file://fixdown j;1~=j])
private void fixDown(int k) { %s~NQ;Y
int j; KK&<Vw|O\
while ((j = k << 1) <= size) { L?Kz P.(t+
if (j < size %26amp;%26amp; queue[j] j++; ccHLL6F{
if (queue[k]>queue[j]) file://不用交换 ;zfQ3$@9
break; fW_}!`:
SortUtil.swap(queue,j,k); d~togTs1
k = j; yYxeNE"
} c n\k`8
} f_Wkg)g
private void fixUp(int k) { +YGw4{\EL
while (k > 1) { _A@fP[C
int j = k >> 1; zhVa.r A
if (queue[j]>queue[k]) G\'u~B/w
break; `<l/GwtAJ
SortUtil.swap(queue,j,k); 2eZk3_w
k = j; PfwI@%2
} $V`KrA~]
} &=+cov(3
M<SbVP|V"
} 3p?<iVE
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} CjC'"+[w
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SortUtil： v!pj v%
l|R<F;|
package org.rut.util.algorithm; N$=(1`zM=
;~'cITL
import org.rut.util.algorithm.support.BubbleSort; 7- *(a
import org.rut.util.algorithm.support.HeapSort; }[=xe(4]D
import org.rut.util.algorithm.support.ImprovedMergeSort; I =tyQ`
import org.rut.util.algorithm.support.ImprovedQuickSort; 4~MJ4:
import org.rut.util.algorithm.support.InsertSort; Zq\RNZ}
import org.rut.util.algorithm.support.MergeSort; 2$j Ot}
import org.rut.util.algorithm.support.QuickSort; AHp830\
import org.rut.util.algorithm.support.SelectionSort; z*NC?\
import org.rut.util.algorithm.support.ShellSort; '[M^f+H|
H|rX$P
/** uu WY4j6
* @author treeroot K$37}S5
* @since 2006-2-2 O X5Co<u
* @version 1.0 zAkc67:
*/ `wn<3#
public class SortUtil { [5Y$L
public final static int INSERT = 1; 8osS OOzM
public final static int BUBBLE = 2; A;kw}!
public final static int SELECTION = 3; >m2<Nl}
public final static int SHELL = 4; z^a6%N
public final static int QUICK = 5; )JY_eG&2Dx
public final static int IMPROVED_QUICK = 6; (dLE<\E
public final static int MERGE = 7; &*>CPO
public final static int IMPROVED_MERGE = 8; dIBKE0`
public final static int HEAP = 9; jE?\Yv3
p,[XT`q^
public static void sort(int[] data) { (^s&M
sort(data, IMPROVED_QUICK); m p|20`go
} epGX.
private static String[] name={ zDvP7hl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HX /GLnY/X
}; NSxPN:
$tt0D?$4
private static Sort[] impl=new Sort[]{ T~wZ
new InsertSort(), I\Gp9w0f
new BubbleSort(), HP4'8#3o
new SelectionSort(), 3j=%De
new ShellSort(), \CJx=[3(
new QuickSort(), bCE7hutl
new ImprovedQuickSort(), M0Kh>u
new MergeSort(), fzkCI
new ImprovedMergeSort(), Zy!)8<Cgm'
new HeapSort() 5E\<r/FeJ
}; cAKoPU>U
v0hfY
public static String toString(int algorithm){ }`<>$2b
return name[algorithm-1]; >XXMIz:
} \AtwO
Kl46CZs#8
public static void sort(int[] data, int algorithm) { HM$`z"p5jg
impl[algorithm-1].sort(data); }!Diai*C
} N[ Lz 0c?
Y|0-m#1F#
public static interface Sort { VM2@{V/=~
public void sort(int[] data); VhH]n yi7D
} aaf_3UH.B
$cJN9|$6
public static void swap(int[] data, int i, int j) { avxn}*:X.
int temp = data; $)TF,-#x
data = data[j]; ExOB P
data[j] = temp; ]"7DV3_
} yhkQFB%gv
} _/sf@R