[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; ~w3u(X$m"
} ~*7$aj
int i1=l; =4MTb_
int i2=mid+1; UP^8Yhdo
for(int cur=l;cur<=r;cur++){ g5@JA^\vZT
if(i1==mid+1) f]8MdYX(
data[cur]=temp[i2++]; ":$4/b6
else if(i2>r) V.&F%(L
data[cur]=temp[i1++]; r@3-vLI!u
else if(temp[i1] data[cur]=temp[i1++]; `=H*4I-"
else JY2<ECO
data[cur]=temp[i2++]; YK)m6zW5
} GMJ4v S
} x6`mv8~9Db
4`Ud\Jm[s
} H[u9C:}9b
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改进后的归并排序: PP$sdmo
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package org.rut.util.algorithm.support; G<e+sDQ2
:oZ<[#p"*
import org.rut.util.algorithm.SortUtil; >8_y-74
rS_G;}Zr
/** `f;w
* @author treeroot rNq*z,
* @since 2006-2-2 Cq!eAc
* @version 1.0 !b+4[xky
*/ M!J7Vj?Ps
public class ImprovedMergeSort implements SortUtil.Sort { QEs$9a5TE
G1 "QX
private static final int THRESHOLD = 10; :')[pO_FW*
Y${'
/* 9(^UchZZi
* (non-Javadoc) }_'5Vb_
* !:|*!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MM@,J<
*/ Q-w# !<L.
public void sort(int[] data) { "tCTkog3]
int[] temp=new int[data.length]; R'v~:wNTNs
mergeSort(data,temp,0,data.length-1); aj`&ca8
} "#iJ/vy
[h3xW
private void mergeSort(int[] data, int[] temp, int l, int r) { /A7( `l;6
int i, j, k; rM7qBt
int mid = (l + r) / 2; LDjtkD.r
if (l == r) W'@|ob
return; wmr?ANk
if ((mid - l) >= THRESHOLD) ln82pQD2Y~
mergeSort(data, temp, l, mid); XZIapT
else `NW/Z/_
insertSort(data, l, mid - l + 1); XR+ SjCA
if ((r - mid) > THRESHOLD) %)lp]Y33
mergeSort(data, temp, mid + 1, r); jA{5)-g
else :.x(( FU
insertSort(data, mid + 1, r - mid); %l7[eZ{Y
(A~7>\r +
for (i = l; i <= mid; i++) { StI N+S@Z
temp = data; z+"$G
} d)AYY}pw
for (j = 1; j <= r - mid; j++) { +5zXbfO
temp[r - j + 1] = data[j + mid]; Yj&Sb
} ]rlZP1".
int a = temp[l]; -+WAaJ(b
int b = temp[r]; _@ao$)q{J
for (i = l, j = r, k = l; k <= r; k++) { *kLFs|U
if (a < b) { L)JB^cxf
data[k] = temp[i++]; fUjo',<s
a = temp; ]@$^Ju,
} else { ,{0Y:/T'
data[k] = temp[j--]; ]M5~p^ RB
b = temp[j]; ^@^8iZ
} Z 8rD9 k$6
} z0 9Gp}^;
} kOQ)QX
*O_fw 0jV
/** /I7V\
* @param data =<n ]T;
* @param l 9\_s&p=:.
* @param i << 6GE
*/ GeR#B;{
private void insertSort(int[] data, int start, int len) { |}G"^r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2)=whnFS
} T)zk2\u
} &nmBsl3Q.
} #p(gB)o:l
} =z# trQ{
X/4CXtX^
堆排序： ^)dsi
}QI \K
package org.rut.util.algorithm.support; [K4cxqlfk
E22o-nI?1
import org.rut.util.algorithm.SortUtil; KtQs uL%
xGsOnY;
/** NljpkeX'
* @author treeroot |#yu
* @since 2006-2-2 2y!n c%
* @version 1.0 /!Rva"
*/ 6Ryc&z5
public class HeapSort implements SortUtil.Sort{ iV{_?f1jo
!BoGSI
/* (non-Javadoc) a OmG,+o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1n`[D&?q
*/ pf8'xdExH)
public void sort(int[] data) { 85E$m'0O
MaxHeap h=new MaxHeap(); g}+|0FTV
h.init(data); ='"Yj
for(int i=0;i h.remove(); *ra)u-
System.arraycopy(h.queue,1,data,0,data.length); &y_t,8>5
} uc,>VzdB
)9Q+07
private static class MaxHeap{ {7e(0QK
=CQfs6np:N
void init(int[] data){ &kb~N-
this.queue=new int[data.length+1]; V[.{cY?6
for(int i=0;i queue[++size]=data; u$JAjA
fixUp(size); J`5VE$2M
} Vg$d|m${
} iF`_-t/k
5RLO}Vn]
private int size=0; hlVC+%8
wiI@DJ>E
private int[] queue; I!/EQO|
8>x5|
public int get() { 7#)k-S!B
return queue[1]; (%R%UkwP9
} 5j`sJvq
!8p>4|VM
public void remove() { n~0wq(8M
SortUtil.swap(queue,1,size--); JlSqTfA
fixDown(1); 3Y P! B=
} fS}Eu4Xe
file://fixdown E]q>ggeNH
private void fixDown(int k) { _L8&.=4]i
int j; R V#w0 r
while ((j = k << 1) <= size) { Z&^vEQ
if (j < size %26amp;%26amp; queue[j] j++; E:rJi]
if (queue[k]>queue[j]) file://不用交换 -(57C*#ap
break; ^fKKsfIf
SortUtil.swap(queue,j,k); "0!#De
k = j; Z(:\Vj"
} K14.!m
} M0m%S:2
private void fixUp(int k) { y6am(ugE
while (k > 1) { ydD:6bBX
int j = k >> 1; &#fPJc
if (queue[j]>queue[k]) @%g:'^/
break; g,E)F90
SortUtil.swap(queue,j,k); ]>)}xfL &,
k = j; eZ) |m
} i8<5|du&?
} =0e>'Iw2
#p"F$@N
} 5@.8O VPz
Wr Wz+5M8
} :V8oWMY
}Bh\N5G%
SortUtil： 2s2KI=6
(O ;R~Io
package org.rut.util.algorithm; H|s Iw:
0lt1/PEKx2
import org.rut.util.algorithm.support.BubbleSort; SFWS<H(IN
import org.rut.util.algorithm.support.HeapSort; GLY,<O>D5
import org.rut.util.algorithm.support.ImprovedMergeSort; (N}\Wft%
import org.rut.util.algorithm.support.ImprovedQuickSort; -XECYwTh
import org.rut.util.algorithm.support.InsertSort; 'o]}vyz;
import org.rut.util.algorithm.support.MergeSort; D6_#r=08
import org.rut.util.algorithm.support.QuickSort; I2{zy|&
import org.rut.util.algorithm.support.SelectionSort; k="wEZ;Q
import org.rut.util.algorithm.support.ShellSort; t2ui9:g4j
@zR_[s
/** =w7k@[Bq
* @author treeroot #r&yH^-
* @since 2006-2-2 l5e`m^GK
* @version 1.0 w2"]%WS%
*/ 1g!%ej jd
public class SortUtil { DKQQZ`PF
public final static int INSERT = 1; :v-,-3AG
public final static int BUBBLE = 2; D5T0o"A
public final static int SELECTION = 3; uN9.U _
public final static int SHELL = 4; Ky7-6$
public final static int QUICK = 5; !Je!;mEvI
public final static int IMPROVED_QUICK = 6; 9OF(UFgS
public final static int MERGE = 7; imS&N.*3m
public final static int IMPROVED_MERGE = 8; %gEfG#S
public final static int HEAP = 9; 5PHAd4=bJ
p t{/|P
public static void sort(int[] data) { h8SK8sK<
sort(data, IMPROVED_QUICK); eR1]<Z$W\
} ]kkH|b$[T
private static String[] name={ +>h'^/rAE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !P:~oo=
}; 0Ioa;XgOn
LTY(6we-
private static Sort[] impl=new Sort[]{ bF3}L=z
new InsertSort(), Y6%O9b
new BubbleSort(), k3"Y!Uha:
new SelectionSort(), r#.\5aQt
new ShellSort(), DCtrTX
new QuickSort(), h "r)z6Q/
new ImprovedQuickSort(), b~;+E#[*
new MergeSort(), ab5z&7Re6
new ImprovedMergeSort(), (OK;*ZH+T@
new HeapSort() 2:S 4M.j
}; ?Da!QH >,]
C@ z^{Z+
public static String toString(int algorithm){ yX8$LOjE
return name[algorithm-1]; &mvC<_1n
} )![?JXf
U,u\o@3A
public static void sort(int[] data, int algorithm) { V5LzUg]
impl[algorithm-1].sort(data); M>g\Y
} >'lte&
-5yEd>Z
public static interface Sort { "Tm`V9
public void sort(int[] data); rOy-6og
} )b AcU
Hlq#X:DCn
public static void swap(int[] data, int i, int j) { &P{[22dQ
int temp = data; {^ ^)bf|1'
data = data[j]; @(A[H^E
data[j] = temp; 2^7VDqLc
} B[O1^jdO
} #}!Ge