[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; b7&5>Q/g
} ghtvAG
int i1=l; stn/
int i2=mid+1; .;#Wf@V
for(int cur=l;cur<=r;cur++){ @T>\pP]o
if(i1==mid+1) >S\D+1PV
data[cur]=temp[i2++]; fX"cQ&
else if(i2>r) %dA6vHI,
data[cur]=temp[i1++]; aYc*v5QN3
else if(temp[i1] data[cur]=temp[i1++]; RJ+i~;-
else @,btQ_'X
data[cur]=temp[i2++]; oNW5/W2e;
} vhe[:`=a
} i> }P V
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} 7OSk0%Q,
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改进后的归并排序: oT9dMhx8
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package org.rut.util.algorithm.support; P_Rh& gkuK
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import org.rut.util.algorithm.SortUtil; z^;0{q,
}.bhsy
/** y>4r<YZQ
* @author treeroot 1?k{jt~
* @since 2006-2-2 PL*Mz(&bf
* @version 1.0 tCZ3n
*/ c;X8:Z=ja
public class ImprovedMergeSort implements SortUtil.Sort { tkQ#mipAj
SvE3E$*
private static final int THRESHOLD = 10; !$}:4}56F
-%R3YU3
/* -nM=^i4)
* (non-Javadoc) =gSa?pd
* :xqhPr]e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M.b1=Y
*/ :2+,?#W
public void sort(int[] data) { ,mkXUW
int[] temp=new int[data.length]; |%p;4b
mergeSort(data,temp,0,data.length-1); ([vyY}43h
} 9 GEMmo3
=v-qao7xCV
private void mergeSort(int[] data, int[] temp, int l, int r) { uO=yQ&
int i, j, k; hn-+]Y:
int mid = (l + r) / 2; *2nQZ^c.
if (l == r) J/OG\}
return; <]{$XcNm
if ((mid - l) >= THRESHOLD) e,*E`ol
mergeSort(data, temp, l, mid); _c[Bjip
else Wd9y8z;
insertSort(data, l, mid - l + 1); OPi><8x
if ((r - mid) > THRESHOLD) 2L\}
mergeSort(data, temp, mid + 1, r); G3[X.%g`
else T9&-t7:
insertSort(data, mid + 1, r - mid); 5~BM+ja
V]4g- CS[
for (i = l; i <= mid; i++) { yiourR)H<
temp = data; uP;qs8
} R;XG2
for (j = 1; j <= r - mid; j++) { by*?PhfF
temp[r - j + 1] = data[j + mid]; V?_:-!NJ(
} 3 VNPdXsh
int a = temp[l]; ]' ck!eG
int b = temp[r]; S_ELZO#7
for (i = l, j = r, k = l; k <= r; k++) { c)L1@qdZ
if (a < b) { NOzAk%s3I
data[k] = temp[i++]; ,tZJSfHB
a = temp; kfb*|
} else { VR5CRNBJ
data[k] = temp[j--]; B4uJT~,7>
b = temp[j]; ]6)~Sj$ 5
} Ev%_8CO4e
} k4@$vxy0
} yaDK_fk
kK62yz,
/** <in#_Of{E
* @param data 0ZRIi70u
* @param l *!mT#Vm^
* @param i QB3vp4pBg@
*/ =x_~7 Xc{
private void insertSort(int[] data, int start, int len) { rzl0*CR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]H%SGQPn
} -}_X'h&"
} ,RA;X
} jUtFDw
} VXfp=JE
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堆排序： Ah_,5Z@&R
9i^dQV.U=
package org.rut.util.algorithm.support; v|]1x2191
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import org.rut.util.algorithm.SortUtil; [unK5l4_!
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/** NZ{)&ObBRt
* @author treeroot !@.9>"FU
* @since 2006-2-2 5*~]=(BE
* @version 1.0 cN{(XmX5n
*/ )(4.7>
public class HeapSort implements SortUtil.Sort{ E((U=P}+g
goJK~d8M*
/* (non-Javadoc) Xc>M_%+R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VuU{7:
*/ %I`%N2ss
public void sort(int[] data) { ?QbxC,& i
MaxHeap h=new MaxHeap(); 0Z11V9Jk
h.init(data); Q;h6F{i
for(int i=0;i h.remove(); vV(?A
System.arraycopy(h.queue,1,data,0,data.length); }=7? & b
} 2:8p>^g=
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private static class MaxHeap{ _NwB7@ e
D#8uj=/%
void init(int[] data){ ^yl)c \`
this.queue=new int[data.length+1]; z\kiYQ6kA
for(int i=0;i queue[++size]=data; eH0^d5bH
fixUp(size); N(7UlS,u'
} BQOit.
} P{2ue`w[
1:.I0x!
private int size=0; ~uUN\qx52
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private int[] queue; XCP/e p
<3SO1@?
public int get() { =sIkA)"!=
return queue[1]; -wdd'G
} X5Fi , /H
8Ry%HV9VE
public void remove() { EE,57(
SortUtil.swap(queue,1,size--); $~h\`vF&
fixDown(1); Vw@?t(l>
} gfPR3%EXs
file://fixdown 'xG:v)(
private void fixDown(int k) { CAJ]@P#Xj+
int j; Y3n6y+Uzk
while ((j = k << 1) <= size) { Y}n$s/O:u8
if (j < size %26amp;%26amp; queue[j] j++; DwNEqHi
if (queue[k]>queue[j]) file://不用交换 S.! n35
break; W }"n*
SortUtil.swap(queue,j,k); (+iOy/5#u
k = j; dEvjB"x
} p7Xe[94d^
} >[qoNy;
private void fixUp(int k) { a3wk#mH
while (k > 1) { K|ZB!oq
int j = k >> 1; #Rj&PzBe
if (queue[j]>queue[k]) h1U8z)D#
break; X:Iam#H
SortUtil.swap(queue,j,k); qOD:+b
k = j; gK#G8V-,
} "C~Zl&3
} <J o\RUx
],l}J'.8<V
} |z 8Wh
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} oNFvRb2Rd
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SortUtil： n#dvBK0M
t/KH`
package org.rut.util.algorithm; ETMF.-P
AEw~LF2w
import org.rut.util.algorithm.support.BubbleSort; Yp@i{$IUW
import org.rut.util.algorithm.support.HeapSort; +\yQZ{4'@
import org.rut.util.algorithm.support.ImprovedMergeSort; -"}mmTa*<
import org.rut.util.algorithm.support.ImprovedQuickSort; j` 5K7~hv
import org.rut.util.algorithm.support.InsertSort; 5<RZht$i
import org.rut.util.algorithm.support.MergeSort; Fu$JI8
import org.rut.util.algorithm.support.QuickSort; huTWoMU
import org.rut.util.algorithm.support.SelectionSort; n]<>$
import org.rut.util.algorithm.support.ShellSort; ~6!TMVr
5f-eWW]!
/** tXg>R _\C
* @author treeroot L Rn)
* @since 2006-2-2 p3W-*lE
* @version 1.0 |qq7vx
*/ Js0hlWu
public class SortUtil { "74Rn"d5
public final static int INSERT = 1; 3o.9}`/
public final static int BUBBLE = 2; i[N=.
public final static int SELECTION = 3; 0<$t9:dq
public final static int SHELL = 4; nf,u'}psdJ
public final static int QUICK = 5; ~}@cSv'(1
public final static int IMPROVED_QUICK = 6; L >HyBB
public final static int MERGE = 7; )ePQN~#K}
public final static int IMPROVED_MERGE = 8; bL9XQ:$C
public final static int HEAP = 9; 1b LY1
[R%Pf/[Fr
public static void sort(int[] data) { Ra-%,cS
sort(data, IMPROVED_QUICK); RKtU@MX49
} %kXg|9Bx!
private static String[] name={ c-".VF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V")u y&Ob
}; 'p> *4}
5LVzT1j|
private static Sort[] impl=new Sort[]{ cP,bob]
new InsertSort(), <"HbX
new BubbleSort(), tjWf`#tH>H
new SelectionSort(), %]\IC(q
new ShellSort(), @";zM&
new QuickSort(), upefjwm
new ImprovedQuickSort(), Bf+7;4-
new MergeSort(), svj0;x5
new ImprovedMergeSort(), u~7 ,v
new HeapSort() ~Kll.
}; )|Md"r_B
.j l|?o
public static String toString(int algorithm){ tMOhH #
return name[algorithm-1]; i286`SLU
} 7 yp}
*)82iD
public static void sort(int[] data, int algorithm) { 12y+g5b
impl[algorithm-1].sort(data); :J~sz)n4
} D)){"Q!b
uNXKUJ V0
public static interface Sort { R\ZyS )~l
public void sort(int[] data); _I A{I
} e)):U
d7i 0'R
public static void swap(int[] data, int i, int j) { uh 3yiDj@a
int temp = data; |4?O4QN
data = data[j]; M.h8Kr!.
data[j] = temp; w^N3Ma
} s;!Tz)
} T$vDw|KSVP