[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; 4>>d "<}C
} >kK
int i1=l; e ?H`p"l
int i2=mid+1; w.Ft-RXA W
for(int cur=l;cur<=r;cur++){ aC$hg+U$G
if(i1==mid+1) .t0Q>:}&b
data[cur]=temp[i2++]; ueYZM<],
else if(i2>r) KaHjL&!
data[cur]=temp[i1++]; Y9 ,KOs
else if(temp[i1] data[cur]=temp[i1++]; vh+IhGi
else T.aY{Y
data[cur]=temp[i2++]; h5ST`jZ
} aBT|Q@Y.
} \=4[v-3H
p}}o#a~V),
} icHc!m?
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改进后的归并排序: y%\kgWV
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package org.rut.util.algorithm.support; Qg9 N?e{z
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import org.rut.util.algorithm.SortUtil; KyNv)=x4c
\ M8;CN
/** }ruBbeQ
* @author treeroot x2[A(O=
* @since 2006-2-2 B9n$8QS
* @version 1.0 IiIF4 pQ,
*/ ~(%nnG6x
public class ImprovedMergeSort implements SortUtil.Sort { S!k cC-7
o6ec\v!l-
private static final int THRESHOLD = 10; +PY LKyS>
&aaXw?/zr
/* ](@Tbm8
* (non-Javadoc) S=ebht=
* q3e%L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Sim\+SL{#
*/ }^^X-_XT
public void sort(int[] data) { 0S;H`w_S
int[] temp=new int[data.length]; INE8@}e
mergeSort(data,temp,0,data.length-1); -Yy,L%E]F:
} ;+`t[ go
EV z>#GC
private void mergeSort(int[] data, int[] temp, int l, int r) { pog*}@OS
int i, j, k; KE`}P<K&
int mid = (l + r) / 2; ]4yWcnf
if (l == r) B{lBUv(B
return; V,fSn:8%M
if ((mid - l) >= THRESHOLD) egxh
mergeSort(data, temp, l, mid); sME3s-
else )}1J.>5
insertSort(data, l, mid - l + 1); r%JJ5Al.S
if ((r - mid) > THRESHOLD) hdp;/Qz&
mergeSort(data, temp, mid + 1, r); S.aSNH<
else r'uD|T H
insertSort(data, mid + 1, r - mid); Oj6-
YgCJ s;
for (i = l; i <= mid; i++) { \IbGNV`q
temp = data; g>A*kY
} 3G dWq*
for (j = 1; j <= r - mid; j++) { WrQe'ny
temp[r - j + 1] = data[j + mid]; c%yhODq/
} [*Nuw_l
int a = temp[l]; VChNDHiH
int b = temp[r]; iVLfAN @
for (i = l, j = r, k = l; k <= r; k++) { 61HU_!A8S
if (a < b) { iF?4G^
data[k] = temp[i++]; \L-o>O
a = temp; eYMp@Cx
} else { 0 Ji>drn
data[k] = temp[j--]; ^+^#KC8]W
b = temp[j]; anjU3j
} 8<z+hWX=4
} 1~Zmc1]
} 'kf]l=i[n
E4GtJ`{X
/** Ds? @LE|
* @param data }9<pLk
* @param l ~tWIVj{
* @param i h5e(Avk
*/ $014/IB
private void insertSort(int[] data, int start, int len) { /-)\$T1d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *JDQaWzBd
} w5w,jD[
} OOn{Wp
} ov*?[Y7|~
} U}<5%"!;
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堆排序： Kur3Gf X
]KdSwIbi
package org.rut.util.algorithm.support; iqm]sC`
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import org.rut.util.algorithm.SortUtil; mD<- <]SYp
#$2{l,>
/** n]^zIe^6
* @author treeroot ul$k xc=N
* @since 2006-2-2 e`9d&"
* @version 1.0 m r"b/oM{
*/ Z:9xf:g*
public class HeapSort implements SortUtil.Sort{ o{7wPwQ;*
n@xC?D:t*
/* (non-Javadoc) Oo^kV:.)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IcRA[ g
*/ d$qivct
public void sort(int[] data) { f]%:.N~1w
MaxHeap h=new MaxHeap(); =jXBF.
h.init(data); jYDpJ##Zb
for(int i=0;i h.remove(); q{T[|(!
System.arraycopy(h.queue,1,data,0,data.length); f?vbIc`
} @lpo$lN0R
Htl2CcZ
private static class MaxHeap{ {o1vv+i
ZOJ<^t}
void init(int[] data){ j5\z7
this.queue=new int[data.length+1]; x7\b-EC
for(int i=0;i queue[++size]=data; ]!CMo+
fixUp(size); O(x1Ja,&
} }huj%Pnk)
} 3-x ;_
+~xY}
private int size=0; 'u@,,FFz[K
gQ90>P:
private int[] queue; >NLG"[\
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public int get() { FM$$0}X
return queue[1]; jN))|eD0x
} {txW>rZX
kjAARW
public void remove() { Z~R7 G
SortUtil.swap(queue,1,size--); y5/frJ
fixDown(1); 6mp8v`b
} #+CH0Z
file://fixdown WH|TdU$V
private void fixDown(int k) { %Q,6sH#
int j; 3.?G,%S5.$
while ((j = k << 1) <= size) { `/ <y0H
if (j < size %26amp;%26amp; queue[j] j++; Sc b'
if (queue[k]>queue[j]) file://不用交换 uuHg=8(
break; EzII!0 F
SortUtil.swap(queue,j,k); 0?V{u`*
k = j; 0zQ~'x
} mIW8K ):
} 75v7w
private void fixUp(int k) { N+lhztYQ?
while (k > 1) { eX`wQoV%
int j = k >> 1; }2xgm9j<
if (queue[j]>queue[k]) n_~u!Ky_P
break; "w7{,HP
SortUtil.swap(queue,j,k); 5Z;iK(>IX
k = j; v']Tusmg
} V.w L
} jk(tw-B
]{Y7mpdB
} <JUumrEo
/]U),LbN
} 8*zORz
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SortUtil： / R-1s
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package org.rut.util.algorithm; uNKf!\Y
J497 >w[
import org.rut.util.algorithm.support.BubbleSort; hMCf| e.UY
import org.rut.util.algorithm.support.HeapSort; b=@H5XTZyK
import org.rut.util.algorithm.support.ImprovedMergeSort; w{8O$4 w
import org.rut.util.algorithm.support.ImprovedQuickSort; g)dKXsy(F
import org.rut.util.algorithm.support.InsertSort; rX(Ol,&oP
import org.rut.util.algorithm.support.MergeSort; E!A+J63zsw
import org.rut.util.algorithm.support.QuickSort; B,V:Qs6"
import org.rut.util.algorithm.support.SelectionSort; pk8`suZ
import org.rut.util.algorithm.support.ShellSort; hZIbN9)8A
L;\f^v(
/** ]ZR}Pm/CA
* @author treeroot dzk1!yy
* @since 2006-2-2 /07iQcT(
* @version 1.0 mX2X.ww(4
*/ jXPf}{^
public class SortUtil { rS>@>8k2,
public final static int INSERT = 1; w`GjQIA
public final static int BUBBLE = 2; zK_Q^M`
public final static int SELECTION = 3; ''^2rF^
public final static int SHELL = 4; \h>6k
public final static int QUICK = 5; KzZfpdI92
public final static int IMPROVED_QUICK = 6; ilRPV'S^
public final static int MERGE = 7; /'4]"%i%3
public final static int IMPROVED_MERGE = 8; bblEZ%
public final static int HEAP = 9; t5CJG'!ql
.TeGA;
public static void sort(int[] data) { Skl:~'W.&|
sort(data, IMPROVED_QUICK); kfY. 9$(d
} xLdkeuL[%
private static String[] name={ %MCJ%Ph
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &8;Fi2}(L
}; &( ZEs c
(I/ZI'Ydy
private static Sort[] impl=new Sort[]{ U(+%iD60i
new InsertSort(), g'+2bQ
new BubbleSort(), :]JMsa6
new SelectionSort(), )Vz=:.D
new ShellSort(), 3qQ}U}-;|
new QuickSort(), _RNP_$a
new ImprovedQuickSort(), Py`7)S
new MergeSort(), |Ed?s
new ImprovedMergeSort(), C%#w1k
new HeapSort() #/"Tb^c9
}; C>Q|"Vf2
%H[~V f?d
public static String toString(int algorithm){ e/uLBZ
return name[algorithm-1]; }#q0K
} DzbcLg%:W
SJ}PV:x
public static void sort(int[] data, int algorithm) { C).+h7{nd
impl[algorithm-1].sort(data); ~OMo$qt`lP
} |H(i)yu"5'
(M?VB*sm0
public static interface Sort { ov5g`uud
public void sort(int[] data); )gx*;z@
} $a|>>?8
5g`J}@"k
public static void swap(int[] data, int i, int j) { #Vhr1;j
int temp = data; >guX,hx^
data = data[j]; 8Ow#W5_3|
data[j] = temp; dy~M5,zn
} ;Kh[6{W
} 8%`h:fE