[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; fDZnC Fa
} +(vL~
int i1=l; KPI[{T\`ZM
int i2=mid+1; >2;KPV0H
for(int cur=l;cur<=r;cur++){ u9%AK g}~
if(i1==mid+1) &Ef6'
data[cur]=temp[i2++]; |~YhN'OJ
else if(i2>r) t)b /c:ql
data[cur]=temp[i1++]; 6>-Gi
else if(temp[i1] data[cur]=temp[i1++]; +g8uV hC
else @RLlkWGc
data[cur]=temp[i2++]; 1xMD )V:
} Vvk\$'
} j'&a)-Wx_
bv'Z~@<c
} O]\eMM&
60%EmX ;
改进后的归并排序: a1A3uP
4mF=A$Q_/
package org.rut.util.algorithm.support; 8!Q0:4Vb
QlWkK.<Z3_
import org.rut.util.algorithm.SortUtil; ?+y# t?
pt8#cU\
/** q'<K$4_,%
* @author treeroot gPr&9pHU
* @since 2006-2-2 *wK7qS~VB2
* @version 1.0 o1@. <Q+}
*/ }7/Ob)O
public class ImprovedMergeSort implements SortUtil.Sort { &^@IAjxn
Y'M}lv$sa
private static final int THRESHOLD = 10; j:'!P<#
r2>y !Q?
/* w}Xy;0c
* (non-Javadoc) O<6!?1|KP
* /BfCh(B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B,RHFlp{
*/ ~n!7 ?4%U
public void sort(int[] data) { SLI358]$<
int[] temp=new int[data.length]; e+P|PW
mergeSort(data,temp,0,data.length-1); )lB*] n`Z]
} %~YQlN
&?B\(?*
private void mergeSort(int[] data, int[] temp, int l, int r) { D_Cd^;b
int i, j, k; 6Pu5 k;H
int mid = (l + r) / 2; nv"D
if (l == r) y{1|@?ii
return; sK`pV8&xq
if ((mid - l) >= THRESHOLD) b:(*C
mergeSort(data, temp, l, mid); Cr%6c3aQ
else Nyo,6 AA
insertSort(data, l, mid - l + 1); &1,qC,:!
if ((r - mid) > THRESHOLD) AJ-~F>gn
mergeSort(data, temp, mid + 1, r); <D{_q.`vA
else +G>;NiP_
insertSort(data, mid + 1, r - mid); Gzu $
KoO\<_@";
for (i = l; i <= mid; i++) { Y4n;[nHQ(
temp = data; ~yuj;9m3
} 0i65.4sK
for (j = 1; j <= r - mid; j++) { jYJfo<
temp[r - j + 1] = data[j + mid]; $)Pmr1==
} *`.4M)Ym~
int a = temp[l]; 3ZU<u;
int b = temp[r]; &y=~:1&f
for (i = l, j = r, k = l; k <= r; k++) { pM'AhzS
if (a < b) { oFUP`p%[
data[k] = temp[i++]; (_O_zu8_
a = temp; IEJp!P,E
} else { `jB2'
data[k] = temp[j--]; WXC}Ie
b = temp[j]; S)d_A
} rJl'+Ae9N|
} #y%?A;
} LXQ-J
JK9}Kb};
/** rC!~4xj-
* @param data k,nRC~Irh
* @param l K# dV.
* @param i 0q ^dpM
*/ +R?d6IjH
private void insertSort(int[] data, int start, int len) { ;qT7BUh(%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [{!5{k!
} A1,- qv1s
} #.n%$r
} <xeo9'k6&
} y*5bF0
B?tO&$s
堆排序： Z*(lg$A9M
tkGJ!aUt
package org.rut.util.algorithm.support; >O&:[CgEF
]1<O [d
import org.rut.util.algorithm.SortUtil; >HXmpu.O
+k4SN
/** h&6v&%S/L
* @author treeroot *m[ow s
* @since 2006-2-2 <C9_5Ce~
* @version 1.0 8L7ZWw d
*/ #7A_p8
public class HeapSort implements SortUtil.Sort{ D>Qc/+
?"[h P=3J
/* (non-Javadoc) I5J9,j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Gp/yr
*/ q={\|j$X
public void sort(int[] data) { ]}&f<X
MaxHeap h=new MaxHeap(); $lMEZt8A
h.init(data); r%/*,lLO
for(int i=0;i h.remove(); H]7;OM/g
System.arraycopy(h.queue,1,data,0,data.length); 3yfq*\_uXw
} )} H46
yS[Z%]bvU
private static class MaxHeap{ c{u~=24;%#
4F+n`{~
void init(int[] data){ DEw_dOJ(
this.queue=new int[data.length+1]; kt;| $
for(int i=0;i queue[++size]=data; H `V3oS~}
fixUp(size); (fjAsbT
} ]7, mo
} 6DG:imGl
'B>%5'SdD
private int size=0; nVC:5ie
>"Z^8J
private int[] queue; bstc|8<
@{Q[M3l
public int get() { ui:
return queue[1]; \&p MF
} oiq7I@Y`x
j:9kJq>mv
public void remove() { < g<Lf[n$
SortUtil.swap(queue,1,size--); 0}UJP
fixDown(1); {<HL}m@kQ
} ;$y(Tvd;
file://fixdown lFNf/j^Z
private void fixDown(int k) { heliL/
int j; >k?/'R
while ((j = k << 1) <= size) { ~_TmS9
if (j < size %26amp;%26amp; queue[j] j++; ?N,'1I
if (queue[k]>queue[j]) file://不用交换 38%xB<Y
break; vRLkz4z
SortUtil.swap(queue,j,k); i~dW)7
k = j; aNpeePF)z
} [*j C
} yuvt<kz
private void fixUp(int k) { ;u'mSJI'
while (k > 1) { tZ]|3wp
int j = k >> 1; *JX)q
if (queue[j]>queue[k]) ~R]E=/m|
break; {Tp0#fi
SortUtil.swap(queue,j,k); p0xd c3
k = j; tj ,*-).4%
} n7"e 79
} 6ZBg/_m
,R1`/aRy
} fa#]G^f
yWACIaj
} HV`{YuP
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SortUtil： 4'W|'4'b
p1Q[c0NMK
package org.rut.util.algorithm; |#x;}_>7
2B8p3A
import org.rut.util.algorithm.support.BubbleSort; %($qg-x
import org.rut.util.algorithm.support.HeapSort; .F0V
import org.rut.util.algorithm.support.ImprovedMergeSort; 2roPZj
import org.rut.util.algorithm.support.ImprovedQuickSort; <_02)6j
import org.rut.util.algorithm.support.InsertSort; r3l}I6
import org.rut.util.algorithm.support.MergeSort; _dj<xPO
import org.rut.util.algorithm.support.QuickSort; jGzs; bE
import org.rut.util.algorithm.support.SelectionSort; *J!oV0#1
import org.rut.util.algorithm.support.ShellSort; \`#;J?Y|`F
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/** {}?s0U$5
* @author treeroot 22\Buk}?
* @since 2006-2-2 FDaHsiI:
* @version 1.0 C+Wb_
*/ "aN<3b
public class SortUtil { GdavCwJ
public final static int INSERT = 1; jK#y7E
public final static int BUBBLE = 2; .*>LD
public final static int SELECTION = 3; OE-$P
public final static int SHELL = 4; N:!XtYA<
public final static int QUICK = 5; BJk:h-m [
public final static int IMPROVED_QUICK = 6; Jp.Sow
public final static int MERGE = 7; jMUE&/k
public final static int IMPROVED_MERGE = 8; Wxg,y{(`
public final static int HEAP = 9; BBw`8!
L`YnrDZK
public static void sort(int[] data) { =iRi9r'l
sort(data, IMPROVED_QUICK); ^Ois]#py
} kwdmw_
private static String[] name={ ^ 3LM%B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $=$I^hV
}; Z9ciS";L
v@;:aN
private static Sort[] impl=new Sort[]{ j-ugsV`2=*
new InsertSort(), C8cB Lsa[J
new BubbleSort(), 7Nc@7_=
new SelectionSort(), x{u_kepv[k
new ShellSort(), ?L#C'Lz2+
new QuickSort(), cD8.rRyD
new ImprovedQuickSort(), Q{!lLka
new MergeSort(), M}}9
new ImprovedMergeSort(), MQ2gzKw>
new HeapSort() N10'./c K
}; geWis(#J
=/J4(#Xb
public static String toString(int algorithm){ z.eqOPW
return name[algorithm-1]; /`0*!sN*5
} AqvRzi(Y
?V#%^ 57p
public static void sort(int[] data, int algorithm) { bK; -Xcm
impl[algorithm-1].sort(data); Z;XR%n8
} dY/=-ymW
Y>EwU
public static interface Sort { *#Hi W)
public void sort(int[] data); ]c+qD,wqt>
} <"/Y`/
E8=.TM]L
public static void swap(int[] data, int i, int j) { %p"x|e
int temp = data; m~r^@D
data = data[j]; a@zKi;
data[j] = temp; DTN@b!
} N7%Jy?-+
} bXc7$5(!VB