[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; XA^:n+Yo
} &WV 9%fI
int i1=l; g<5Pc,
int i2=mid+1; [ESs?v$
for(int cur=l;cur<=r;cur++){ ?'_7#0R_0
if(i1==mid+1) dM$G)9N)K
data[cur]=temp[i2++]; u5|e9(J
else if(i2>r) ^i k|l=
data[cur]=temp[i1++]; 4sgwQ$m)
else if(temp[i1] data[cur]=temp[i1++]; u:kY4T+Z
else 6_ 0w>
data[cur]=temp[i2++]; v-aq".XQ
} 9&FV=}MO
} ,TA[el%#
QX3![;0F
} a;6\T*iJ!
I%WK*AORM
改进后的归并排序: %*; 8m'
c|a|z}(/J
package org.rut.util.algorithm.support; `lOoT
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import org.rut.util.algorithm.SortUtil; KPcuGJ
O lIH0
/** cf3c+.o
* @author treeroot f__WnW5h
* @since 2006-2-2 r1?FH2Ns
* @version 1.0 Qz$Dv@*y\
*/ dNt|"9~&
public class ImprovedMergeSort implements SortUtil.Sort { S.4YC>E
Q]:%Jj2
private static final int THRESHOLD = 10; &Rt]K
W,J,h6{F
/* k.Nu(j"z
* (non-Javadoc) V1U[p3J-S
* p&27|1pZm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?b$zuJ]
*/ BC[d={_-
public void sort(int[] data) { NUtyUv
int[] temp=new int[data.length]; ~n 9DG>a
mergeSort(data,temp,0,data.length-1); \+A<s,x
} JNl+UH:.
T#f@8 -XUE
private void mergeSort(int[] data, int[] temp, int l, int r) { LP_F"?4
int i, j, k; @]3Rw[%z
int mid = (l + r) / 2; G* 6<pp
if (l == r) SX,zJ`"
return; LK5H~FK
if ((mid - l) >= THRESHOLD) a][Z;g
mergeSort(data, temp, l, mid); QYGxr+D
else *s4!;2ZhsU
insertSort(data, l, mid - l + 1); mf'1.{
if ((r - mid) > THRESHOLD) Jjq%cA
mergeSort(data, temp, mid + 1, r); I]$d,N!.
else jYZWf `X~
insertSort(data, mid + 1, r - mid); vw;
9Q1GV>j>B
for (i = l; i <= mid; i++) { YTit=4|
temp = data; _x{x#d;L3
} +yI^<BH
for (j = 1; j <= r - mid; j++) { 8PS:yBkA|
temp[r - j + 1] = data[j + mid]; k| o,gcU
} ![tI(TPq
int a = temp[l]; v[ '5X
int b = temp[r]; JwczE9~o
for (i = l, j = r, k = l; k <= r; k++) { ?@(H. D6'v
if (a < b) { DyZ90]N
data[k] = temp[i++]; %Q~Lk]B?t
a = temp; ::`wx@
} else { 0E[Se|!
data[k] = temp[j--]; va;wQ~&
b = temp[j]; qZ}XjL
} N|LVLsK
} .>&fwG
} bm.H0rHR4
R<Tzt'z
/** ~MOCr
* @param data k 'b|#c9c
* @param l `pUArqf
* @param i o7seGw<$X
*/ ,;18:
private void insertSort(int[] data, int start, int len) { PBv43uIL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); VA.1JBQ
} $)~]4n=
} L]}|{<3\
} S8,06/#
} ISmnZ@
<,C})H?
堆排序： T5;D0tM/
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package org.rut.util.algorithm.support; D ]eF3a.G
iH=@``Z
import org.rut.util.algorithm.SortUtil; -;*Z!|e9
uBgHtjmae
/** ;8Cqy80K
* @author treeroot w>s
* @since 2006-2-2 IWgC6)n@n
* @version 1.0 ^S|^1
*/ tPHiz%
public class HeapSort implements SortUtil.Sort{ '*;rm*n
~s_$a8
/* (non-Javadoc) Y<XDR:]A,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |93%,
*/ wP9C\W;
public void sort(int[] data) { '=@x2`U/
MaxHeap h=new MaxHeap(); NU[{oI<a
h.init(data); 5KSsRq/8"
for(int i=0;i h.remove(); IuF-bxA
System.arraycopy(h.queue,1,data,0,data.length); @Q!j7I
} :u0433z:
0a'y\f:6*
private static class MaxHeap{ MC@cT^Z^
O7sn>uO
void init(int[] data){ < lrw7T
this.queue=new int[data.length+1]; )J0VB't
for(int i=0;i queue[++size]=data; ~k3r$e@
fixUp(size); ![V- e
} @:I/lg=Qd
} M{QNpoM
.R,8<4
private int size=0; OA0\b_
6z*L9Vy($
private int[] queue; t}nRWo
;Z*RCuwg
public int get() { d\f5\Y
return queue[1]; {Hv=iVmt
} !l|Qyk[
;`+,gVrp
public void remove() { 'Bx7b(xqk
SortUtil.swap(queue,1,size--); {TNAK%'v
fixDown(1); "=;&{N~8U
} AUK7a
file://fixdown N_0O""d
private void fixDown(int k) { GZw<Y+/V"5
int j; t-Wn@a
while ((j = k << 1) <= size) { =DgD&_
if (j < size %26amp;%26amp; queue[j] j++; ;ORy&H aKl
if (queue[k]>queue[j]) file://不用交换 ;V GrZZ
break; oCrn
SortUtil.swap(queue,j,k); +l9avy+P(
k = j; "n:9JqPb
} fomkwN
} v\c3=DbO
private void fixUp(int k) { khfE<<$=
while (k > 1) { or<JjTJ\o_
int j = k >> 1; i/L1KiCLx
if (queue[j]>queue[k]) hmo?gD<
break; L[K_!^MZ
SortUtil.swap(queue,j,k); ){}#v&
k = j; n7G$gLX
} a_yV*N`D
} i@RjG
-1R~3j1_
} \WTg0b[
SUw{xGp
} kLhtkuS4
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SortUtil： ]V_9[=%
0)B+:
package org.rut.util.algorithm; MouYZI)
wg_Z!(Hr#
import org.rut.util.algorithm.support.BubbleSort; l;2bBx7vW
import org.rut.util.algorithm.support.HeapSort; 'a}{s>{O
import org.rut.util.algorithm.support.ImprovedMergeSort; aE"t['
import org.rut.util.algorithm.support.ImprovedQuickSort; e.T5F`Du
import org.rut.util.algorithm.support.InsertSort; ZDf9Npe
import org.rut.util.algorithm.support.MergeSort; wmIq{CXx,
import org.rut.util.algorithm.support.QuickSort; + |,CIl+
import org.rut.util.algorithm.support.SelectionSort; ,y.0Cb0
import org.rut.util.algorithm.support.ShellSort; JnZxP> 2B
YpL}R#
/** xR.Ql>
* @author treeroot ZUh<2F
* @since 2006-2-2 {1Qwwhov
* @version 1.0 S92Dvw?
*/ }&j&T9oX
public class SortUtil { TuU.yvkU
public final static int INSERT = 1; /vhh2`
public final static int BUBBLE = 2; ax<0grK
public final static int SELECTION = 3; #k6;~
public final static int SHELL = 4; X[w9~t$\
public final static int QUICK = 5; -zkB`~u_
public final static int IMPROVED_QUICK = 6; QUNsS9
public final static int MERGE = 7; QNo}nl/N
public final static int IMPROVED_MERGE = 8; 0kkiS3T
public final static int HEAP = 9; pmS=$z;I
n'gfB]H[
public static void sort(int[] data) { ?`r/_EKNv
sort(data, IMPROVED_QUICK); fq(e~Aqw$
} rLnu\X=h$
private static String[] name={ /~yqZD<O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &jJgAZ!
}; q\,H9/.0k
T:ck/:ZH
private static Sort[] impl=new Sort[]{ 5HU>o|.
new InsertSort(), 2{&" 3dq
new BubbleSort(), ZG>OT@ GA
new SelectionSort(), 0,c z&8
new ShellSort(), ji2#O.
new QuickSort(), oGM.{\i
new ImprovedQuickSort(), #GF1MFkoS
new MergeSort(), >M!>Hl/
new ImprovedMergeSort(), JG_7G=~
new HeapSort() ()?)Ybqss
}; pv T!6+
\|(;q+n?k
public static String toString(int algorithm){ J+zqu
return name[algorithm-1]; iqU}t2vFrj
} IFgF5VG6g
v/.2Z(sZ
public static void sort(int[] data, int algorithm) { +bXZE
impl[algorithm-1].sort(data); p)oW'#@a
} OjCT%6hy;
_Sg29qFK
public static interface Sort { 'L,rJ =M3
public void sort(int[] data); yZ 9 *oDs
} OLi;/(g
>}9TdP/oT
public static void swap(int[] data, int i, int j) { uODsXi{z
int temp = data; \DHCf4,
data = data[j]; =nsY[ s<
data[j] = temp; <7p2OPD
} \yy!?UlaI
} 1w5nBVC*$V