[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; v7f[$s$m
} hb>uHUb&
int i1=l; m]}EVa_I`/
int i2=mid+1; pezfB{x?
for(int cur=l;cur<=r;cur++){ {J/+KK
if(i1==mid+1) Vw`%|x"Xz
data[cur]=temp[i2++]; th5UzpB4
else if(i2>r) *r|13|k
data[cur]=temp[i1++]; (aB:P03
else if(temp[i1] data[cur]=temp[i1++]; l(}l([rdQ
else OJ.oHf=K!
data[cur]=temp[i2++]; _P%PjFQ)
} \7e4t
} KYq<n& s
0;%\L:,O
} ; NO#/
c]|Tg9AW
改进后的归并排序: ojVN-*5
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package org.rut.util.algorithm.support; v7D0E[)~
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import org.rut.util.algorithm.SortUtil; BU|m{YZ$
/)4Q%Zp
/** xX8c>p
* @author treeroot @2>ce2+
* @since 2006-2-2 ]#rNz"
* @version 1.0 ^GiWU +`
*/ 'G`xD3 E3,
public class ImprovedMergeSort implements SortUtil.Sort { yz)Nco]
gA19f
private static final int THRESHOLD = 10; x$pz(Q&v
_6]tbni?v
/* Mv:\T%]
* (non-Javadoc) `u8(qGg7GF
* r'@7aT&_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bKh}Y`
*/ ft!D2M
public void sort(int[] data) { x@|10GC#:
int[] temp=new int[data.length]; )[=C@U
mergeSort(data,temp,0,data.length-1); {l\Ep=O vx
} -:Q"aeC5
q^L"@Q5;
private void mergeSort(int[] data, int[] temp, int l, int r) { o ,8;=f,7
int i, j, k; u_*y~1^0
int mid = (l + r) / 2; -@~4:o
if (l == r) ,<TJh[TzC6
return; #.LI`nYA
if ((mid - l) >= THRESHOLD) ^xr &E
mergeSort(data, temp, l, mid); m,F4N$
else 59V8cO+qH
insertSort(data, l, mid - l + 1); U?EXPi61Z
if ((r - mid) > THRESHOLD) gGs"i]c
mergeSort(data, temp, mid + 1, r); ifmX<'(9A
else *#GX~3A
insertSort(data, mid + 1, r - mid); 4OG1_6K
i\* b<V
for (i = l; i <= mid; i++) { %V(U]sbV
temp = data; 0bu!(Tpg7
} qR4-~p8
for (j = 1; j <= r - mid; j++) { wid
temp[r - j + 1] = data[j + mid]; eXkpU7w;
} &-Q_%eM^
int a = temp[l]; &7eN EA
int b = temp[r]; +;q`A1
for (i = l, j = r, k = l; k <= r; k++) { /KlSI<T@
if (a < b) { )1<GSr9
data[k] = temp[i++]; k7 Ne(4P
a = temp; 6hHMxS^o
} else { ^vI`#}?
data[k] = temp[j--]; unr`.}A2>
b = temp[j]; mlz|KI~\F;
} HrRw
} @2+'s;mUV
} ,X\qlT5C
T|5uywA|
/** O44Fj)
* @param data hKems3
* @param l c2PBYFCyC
* @param i r6nWrO>y
*/ V@`%k]k
private void insertSort(int[] data, int start, int len) { :GM3n$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `/(9#E
} R l)g[s
} Y*S(uqM
} :S+Bu*OyH
} 0.B'Bvn=s2
m4R:KjN*
堆排序： JRDIGS_~
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package org.rut.util.algorithm.support; !]&+g'aC3
] B>.}
import org.rut.util.algorithm.SortUtil; ~hT(uxU/
c3O&sa V!
/** WKq{g+a
* @author treeroot ^KQZ;[B
* @since 2006-2-2 :=K+~?
* @version 1.0 gbu)bqu2x
*/ Mp@dts/|
public class HeapSort implements SortUtil.Sort{ =3GgfU5k
~;oaW<"
/* (non-Javadoc) e`?o`@vO,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) = @ 1{LF;
*/ hE +M|#o
public void sort(int[] data) { <"7Wb"+
MaxHeap h=new MaxHeap(); Pe@*')o*
h.init(data); >{"E~U
for(int i=0;i h.remove(); T~d_?UAw$
System.arraycopy(h.queue,1,data,0,data.length); UvL=^*tm
} 2hb>6Z;r]K
VzWH9%w
private static class MaxHeap{ '.7ER
W'v o?
void init(int[] data){ RVr5^l;"
this.queue=new int[data.length+1]; 6N/6WrQEeg
for(int i=0;i queue[++size]=data; 6vg` 8
fixUp(size); _F2ofB'
} /7WdG)'
} `_3Gb
?4_ME3$t
private int size=0; @$;I%
0fN; L;v
private int[] queue; 26=G%F6
} ;d=
public int get() { Z3-=TN
return queue[1]; f/sLQdK,
} -E.fo._L5
Rvd'uIJ
public void remove() { (:RYd6i
SortUtil.swap(queue,1,size--); i`!>zl+D
fixDown(1); xQNGlVipZ@
} p,3}A(>
file://fixdown PD-*rG `
private void fixDown(int k) { 9{-H/YS\_s
int j; ~b6c:db3
while ((j = k << 1) <= size) { ,be$~7qS
if (j < size %26amp;%26amp; queue[j] j++; aoGns46Y
if (queue[k]>queue[j]) file://不用交换 <}}u'5;^?x
break; *d-JAE
SortUtil.swap(queue,j,k); C-^8;xd
k = j; z7&m,:M
} =RHIB1
} l(8@?t^;
private void fixUp(int k) { #d$lN}8
while (k > 1) { r>6FJ:Tx
int j = k >> 1; K#R|GEwr
if (queue[j]>queue[k]) I.U=%{.
break; <9S5
SortUtil.swap(queue,j,k); ;S'1fci6
k = j; x}OJ~Yk]
} NOl/y@#
} E=ObfN"ge
/lc4oXG8
} oW6b3Q/B
|)[&V3+|
} R?#.z#
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SortUtil： r<DPh5ReY
`6v24?z
package org.rut.util.algorithm; -v9x tNg
H?;@r1ZAn
import org.rut.util.algorithm.support.BubbleSort; x.'Ys1M
import org.rut.util.algorithm.support.HeapSort; ksyQ_4^SO
import org.rut.util.algorithm.support.ImprovedMergeSort; pV$A?b"?*
import org.rut.util.algorithm.support.ImprovedQuickSort; 7s0pH+
import org.rut.util.algorithm.support.InsertSort; -2Dgr\M
import org.rut.util.algorithm.support.MergeSort; f;bVzti+w
import org.rut.util.algorithm.support.QuickSort; `_OB_F
import org.rut.util.algorithm.support.SelectionSort; 4XSq\.@G
import org.rut.util.algorithm.support.ShellSort; Q'aVdJN,
ov1#BeQ
/** ob9=/ R?i
* @author treeroot Xvxrz{
* @since 2006-2-2 =h/61Bl3
* @version 1.0 ceae~
*/ n]3Z~HoZ
public class SortUtil { 07>D G#
public final static int INSERT = 1; J>fq5
public final static int BUBBLE = 2; -9R.mG
public final static int SELECTION = 3; ~oRT@E
public final static int SHELL = 4; H5be5
public final static int QUICK = 5; sc z8`%
public final static int IMPROVED_QUICK = 6; .G>~xm0
public final static int MERGE = 7; u|(Iu}sE=
public final static int IMPROVED_MERGE = 8; b\H,+|iK
public final static int HEAP = 9; 9jllW[`2F
\\Nt^j3qR
public static void sort(int[] data) { -'Z-8
sort(data, IMPROVED_QUICK); fBKN?]BdN
} (Vt5@25JW
private static String[] name={ %:7/ym[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )#,a'~w
}; h3Nbgxa.
jm[f|4\
private static Sort[] impl=new Sort[]{ YOtzja]~
new InsertSort(), 1vCVTuRF
new BubbleSort(), 9!6u Yf+
new SelectionSort(), |wuN`;gc"
new ShellSort(), g ~%IA.$c
new QuickSort(), Or-LQ^~
new ImprovedQuickSort(), a,e;(/#\7
new MergeSort(), )2R]KU_=g
new ImprovedMergeSort(), srH.$Y;~
new HeapSort() ix 5\Y
}; [!4V_yOb
vX$|/74
public static String toString(int algorithm){ tD]vx`0>
return name[algorithm-1]; LftzW{>gI"
} jK2gc^"t
T;3B_lu]
public static void sort(int[] data, int algorithm) { 0&c<1;
impl[algorithm-1].sort(data); R[H#av
} \M~uNWv|
B XO,
public static interface Sort { 6.vwK3\>~
public void sort(int[] data); 4r9AUmJqw
} 8cj}9}k
ngzQVaB9
public static void swap(int[] data, int i, int j) { dDl_Pyg4K
int temp = data; MF+F8h>/
data = data[j]; x/%/MFK)>8
data[j] = temp; Srrzj-9^)K
} tNxKpA |F
} v5.KCc}"