[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; !nu['6I%
} o ZAjta_4
int i1=l; +n:#Uf)
int i2=mid+1; @@5u{K
for(int cur=l;cur<=r;cur++){ o{ (v
if(i1==mid+1) X#o:-FKf
data[cur]=temp[i2++]; &K4o8Qz
else if(i2>r) A=])pYE1
data[cur]=temp[i1++]; 8RK\B%UW
else if(temp[i1] data[cur]=temp[i1++]; saZ;ixV
else Y7p#K<y]9
data[cur]=temp[i2++]; 0I k@d'7
} b,'./{c0
} ?SpI^Wn)[
VcP#/&B|
} 48DsRy
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改进后的归并排序: k >MgrtJI
H!A^ MI
package org.rut.util.algorithm.support; V *]!N
qM`SN4C
import org.rut.util.algorithm.SortUtil; qg|+BIiUz
vi2xonq^
/** g(`6cY[}
* @author treeroot A(uN=r@O
* @since 2006-2-2 <L`R!}
* @version 1.0 OJK/>
*/ +VeLd+Q}
public class ImprovedMergeSort implements SortUtil.Sort { [L275]4n!]
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private static final int THRESHOLD = 10; NUU}8a(K
9O)>>1}*S
/* @@$ _TaI
* (non-Javadoc) EZHEJW'JnE
* =FKB)#N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -(2-zznZ
*/ AE$)RhY`
public void sort(int[] data) { upJishy&I
int[] temp=new int[data.length]; [ ~E}x
mergeSort(data,temp,0,data.length-1); P-mrH
} i||YD-hkK
p$V+IJtO(
private void mergeSort(int[] data, int[] temp, int l, int r) { k"U4E J{
int i, j, k; Fc]#\d6
int mid = (l + r) / 2; 4rx|6NV6
if (l == r) '-x%?Ll
return; J0oR]eT}
if ((mid - l) >= THRESHOLD) ^"f
mergeSort(data, temp, l, mid); f]lDJ?+ M
else i6-K!
insertSort(data, l, mid - l + 1); XC$~!
if ((r - mid) > THRESHOLD) ^T[#rNkeL
mergeSort(data, temp, mid + 1, r); }dxdxnVt
else F&P)mbz1
insertSort(data, mid + 1, r - mid); A1_x^s
#-W5$1
for (i = l; i <= mid; i++) { %{{#Q]]&
temp = data; Pv'x|p*
} 3l^pY18H'
for (j = 1; j <= r - mid; j++) { V]AL'}( 0
temp[r - j + 1] = data[j + mid]; '*k\IM{h
} C+k>Ajr
int a = temp[l]; X*~YCF[_
int b = temp[r]; pg<>Ow5,~l
for (i = l, j = r, k = l; k <= r; k++) { ,..b)H5n
if (a < b) { [q@%)F
data[k] = temp[i++]; G9i#_
a = temp; bcYz?o6
} else { 3)ip@29F
data[k] = temp[j--]; |j+~Td3})&
b = temp[j]; ieI-_]|[
} H~@h #6
} WIghP5%W
} NWvxbv
2V]2jxOQ
/** W1s|7
* @param data s,RS}ek~|
* @param l 3:gk:j#
* @param i 5Zov<+kE
*/ 1K`A.J:Uy
private void insertSort(int[] data, int start, int len) { AM[:Og S
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ef!F;De)A
} ]'G7(Y\)f
} d !H)voX
} :NLNxK
} *O;N"jf
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堆排序： u *< (B
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package org.rut.util.algorithm.support; QKO(8D6+
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import org.rut.util.algorithm.SortUtil; qha<.Ro
hD*?\bBs0
/** D.!4i.)8}
* @author treeroot $d"+Njd
* @since 2006-2-2 V*aTDU%-.
* @version 1.0 !8g y)2
*/ NO$Nl/XM
public class HeapSort implements SortUtil.Sort{ #q- _
*E]\l+]J
/* (non-Javadoc) cMv3` $
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UQFuEI<1-
*/ >W<5$.G
public void sort(int[] data) { J0 P
MaxHeap h=new MaxHeap(); PG!vn@b6
h.init(data); *l//r V?l
for(int i=0;i h.remove(); CmTJa5:
System.arraycopy(h.queue,1,data,0,data.length); =N c`hP
} ;vitg"Zh>
Jj " {r{
private static class MaxHeap{ #t O!3=0
Pz 'Hqvd
void init(int[] data){ ?<;<#JN
this.queue=new int[data.length+1]; ?KN_J
for(int i=0;i queue[++size]=data; *v+ fkg
fixUp(size); zYL^e @
} +[ zo2lBx
} To`?<]8
'UxA8i(
private int size=0; 0"`skYJ@
7L*`nU|h
private int[] queue; m5Kx}H~
Mx"tUoU6z
public int get() { MF`'r#@:wa
return queue[1]; yKJ^hv"#
} YLGLr@:q
Q)>'fZ)
public void remove() { H<;j&\$q
SortUtil.swap(queue,1,size--); yH^*Fp8V
fixDown(1); R 6Em^A/>
} fm0(
file://fixdown GN0'-z6Uy
private void fixDown(int k) { 5b,98Q
int j; '_)tR;s
while ((j = k << 1) <= size) { c &HoS
if (j < size %26amp;%26amp; queue[j] j++; qE}YVKV*
if (queue[k]>queue[j]) file://不用交换 LnGSYrx1
break; 7W"menw
SortUtil.swap(queue,j,k); BP$#a #
k = j; "+&<Qd2
} ;>N ~,Q
} z3]U%y(,
private void fixUp(int k) { 639k&"V
while (k > 1) { V{{x~Q9
int j = k >> 1; _3a 5/IZ
if (queue[j]>queue[k]) 3iw9jhK!W
break; j&.BbcE45
SortUtil.swap(queue,j,k); Z.pw!mu"
k = j; @_3$(*n$~
} x3|'jmg
} 0 ,-b %X
Y=Qf!Cq]
} W<"\hQI
=L%3q<]p
} N/BU%c ph+
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SortUtil： n~j[Pw
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package org.rut.util.algorithm; AHJ;>"]
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import org.rut.util.algorithm.support.BubbleSort; Oy$BR <\
import org.rut.util.algorithm.support.HeapSort; mNoqs&UB
import org.rut.util.algorithm.support.ImprovedMergeSort; ?` i/
import org.rut.util.algorithm.support.ImprovedQuickSort; 3:1 c_
import org.rut.util.algorithm.support.InsertSort; u7WM6X
import org.rut.util.algorithm.support.MergeSort; 4sjr\9IDC
import org.rut.util.algorithm.support.QuickSort; +;;%Atgn
import org.rut.util.algorithm.support.SelectionSort; }8 _9V|E
import org.rut.util.algorithm.support.ShellSort; J_|x^
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/** _#mqg]W'
* @author treeroot bq-\'h f<
* @since 2006-2-2 *(B[J
* @version 1.0 &tCtCk%{j
*/ ZnLk :6'
public class SortUtil { T0%TeFY
public final static int INSERT = 1; J|S^K kC
public final static int BUBBLE = 2; mcr#Ze
public final static int SELECTION = 3; "%*lE0Tx
public final static int SHELL = 4; *J5RueUG
public final static int QUICK = 5; |wQZ~Ux:
public final static int IMPROVED_QUICK = 6; shIi,!bZ
public final static int MERGE = 7; +z0}{,HX
public final static int IMPROVED_MERGE = 8; ^]&{"!
public final static int HEAP = 9; I?Fa
+t4m\/y
public static void sort(int[] data) { DAHf&/JK
sort(data, IMPROVED_QUICK); vqMk)htIz
} &>.1%x@R
private static String[] name={ PRC)GP&q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6xh#;+e}
}; _PUm Pom.
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private static Sort[] impl=new Sort[]{ cE5Zxcn
new InsertSort(), ?^ezEpW
new BubbleSort(), `sy &dyM
new SelectionSort(), 3,I >.3
new ShellSort(), D*'M^k|1
new QuickSort(), AO$PuzlLh
new ImprovedQuickSort(), Juqn X
new MergeSort(), e.|RC
new ImprovedMergeSort(), hRIS[#z;U
new HeapSort() OKP_3Ns
}; ESjJHZoD(
cqL7dlhIl
public static String toString(int algorithm){ {JCz^0DV
return name[algorithm-1]; g*?+~0"`Y
} ugCS &
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public static void sort(int[] data, int algorithm) { Ny,A#-?
impl[algorithm-1].sort(data); MI'l4<>u
} W<|K
Bi:wP/>v
public static interface Sort { oEoJa:h
public void sort(int[] data); }9udo,RWu
} ?J@qg20z
ak8^/1*@
public static void swap(int[] data, int i, int j) { LiD |4(3
int temp = data; bSR+yr'?
data = data[j]; _JJKbi
data[j] = temp; _% 9+U[@
} ) v5n "W
} 7h9[-d6