[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; 3a|\dav%
} ?4B`9<j8%
int i1=l; ,vDbp?)'U
int i2=mid+1; y)*RV;^
for(int cur=l;cur<=r;cur++){ #1[u(<AS
if(i1==mid+1) :pUtSs7p}
data[cur]=temp[i2++]; UI#h&j5pW
else if(i2>r) W4N{S.#!
data[cur]=temp[i1++]; F5Va+z,jg
else if(temp[i1] data[cur]=temp[i1++]; j@9T.P1
else ;);kEq/=P
data[cur]=temp[i2++]; h\e.e3/
} Y0>y8UV
} Z}QB.$&
% `3jL7|
} :-'qC8C
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改进后的归并排序: :%.D78&
HV.t6@\};
package org.rut.util.algorithm.support; =Uh$&m
xA/D'
import org.rut.util.algorithm.SortUtil; RpF&\x>
Ned."e
/** KSvE~h[#+
* @author treeroot ys~x$
* @since 2006-2-2 40/Y\
* @version 1.0 1qch]1 ^G
*/ pGZ8F
public class ImprovedMergeSort implements SortUtil.Sort { q@qsp&0/
eJSxn1GW
private static final int THRESHOLD = 10; eIlva?
i$@:@&(~Y
/* YN,A)w:]
* (non-Javadoc) N$DkX)Z
* xmX 4qtAL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u"8yK5!
*/ O=lzT~G|4
public void sort(int[] data) { %*U'@r(A
int[] temp=new int[data.length]; 6mE\OS-I
mergeSort(data,temp,0,data.length-1); >0gW4!7Y
} C}X\|J
J05e#-)<K
private void mergeSort(int[] data, int[] temp, int l, int r) { S3#>9k;p
int i, j, k; =-T]3!
int mid = (l + r) / 2; @co S+t
if (l == r) B[}6-2<>?C
return; 7P T{lT
if ((mid - l) >= THRESHOLD) 43w}qY1
mergeSort(data, temp, l, mid); GB^Br6
else lFkR=!?=
insertSort(data, l, mid - l + 1); .d*8C,
if ((r - mid) > THRESHOLD) ye97!nIg@
mergeSort(data, temp, mid + 1, r); i@q&5;%%
else hb-%_c"kq
insertSort(data, mid + 1, r - mid); gIfh3D=yX
[WJ+h~~ o
for (i = l; i <= mid; i++) { Zfw,7am/
temp = data; rjP/l6 ~'
} SJLis"8
for (j = 1; j <= r - mid; j++) { N[hG8f
temp[r - j + 1] = data[j + mid]; K:M8h{Ua
} y7{?Ip4[
int a = temp[l]; [UR-I0 s!/
int b = temp[r]; /QQ*8o8
for (i = l, j = r, k = l; k <= r; k++) { XZf$K_F&M
if (a < b) { VUc%4U{Cti
data[k] = temp[i++]; @WhHUd4s
a = temp; mv><HqDL1
} else { s.rm7r@#
data[k] = temp[j--]; Ef\-VKh
b = temp[j]; Wqnc{oq|$
} #tHK"20
} =I<R!ZSN
} OI*H,Z"
1 zZlC#V
/** VVZ'i.*_3?
* @param data 4*L_)z&4;
* @param l O1lNAcpeM
* @param i !i50QA|(G
*/ Gt1U!dP
private void insertSort(int[] data, int start, int len) { `uFdwO'DD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0sqFF[i
} F2WKd1U
} :/#rZPPF
} Q8NX)R
} XSDpRo
pRqx`5 }
堆排序： <} .$l
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package org.rut.util.algorithm.support; p?!/+
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import org.rut.util.algorithm.SortUtil; hrn+UL:d
^c<Ve'-
/** %4H%?4
* @author treeroot ,hVli/
* @since 2006-2-2 d~H`CrQE*
* @version 1.0 2:kH[#
*/ >j/w@Fj
public class HeapSort implements SortUtil.Sort{ s#11FfF`
*VcJ= b 2Y
/* (non-Javadoc) +2{Lh7Ks
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D^O@'zP=At
*/ &pRREu:[4L
public void sort(int[] data) { UVP vOtZj
MaxHeap h=new MaxHeap(); e= AKD#
h.init(data); f8~_E
for(int i=0;i h.remove(); {.yB'.k?
System.arraycopy(h.queue,1,data,0,data.length); $mILoy B,
} \dVOwr
>A= f1DF
private static class MaxHeap{ X8|,
zfU{Kd
void init(int[] data){ ;TYBx24vD'
this.queue=new int[data.length+1]; O-^Ma-}
for(int i=0;i queue[++size]=data; 6Oq7#3]
fixUp(size); Vksuu@cch
} ]G\}k
} }7Uoh(d
g#bRT*,L
private int size=0; V`- 9m$
s<Ziegmw|g
private int[] queue; -f .,tM=
jp,4h4C^)
public int get() { wMn i
return queue[1]; zPO9!?7|
} Nb\4 /;#
F8=+j_UGI
public void remove() { h`q1
SortUtil.swap(queue,1,size--); ]M=&+c>H~
fixDown(1); *@5@,=d
} f|5co>Hk
file://fixdown 4Z*/WsCv
private void fixDown(int k) { :;}P*T*PU
int j; ?`s8 pPc4
while ((j = k << 1) <= size) { sC'`~}C
if (j < size %26amp;%26amp; queue[j] j++; T)/eeZ$
if (queue[k]>queue[j]) file://不用交换 3fj4%P"
break; {)XTk&"
SortUtil.swap(queue,j,k); HJ"GnZp<
k = j; `yyG/l
} HPl<%%TI
} 4(+PD&_J
private void fixUp(int k) { d{?LD?,)
while (k > 1) { 6P3*Z
int j = k >> 1; |Cv!,]9:r
if (queue[j]>queue[k]) .v K-LHs
break; VA%J\T|G2\
SortUtil.swap(queue,j,k); r!v\"6:OM
k = j; ?uu*L6
} 2/?|&[
} IGl9g_18
w)f#V s
} x2xRBkRg=
F9PxSk_\9
} i-1op> Y
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SortUtil： %9"H
w;M#c Y
package org.rut.util.algorithm; .-zom~N-?
4W75T2q#
import org.rut.util.algorithm.support.BubbleSort; wYea\^co
import org.rut.util.algorithm.support.HeapSort; F,kZU$
import org.rut.util.algorithm.support.ImprovedMergeSort; &=[WIG+rk
import org.rut.util.algorithm.support.ImprovedQuickSort; _`X:jj>
import org.rut.util.algorithm.support.InsertSort; 0-gAyiKx?
import org.rut.util.algorithm.support.MergeSort; +A+)=/i;
import org.rut.util.algorithm.support.QuickSort; HS$r8`S?)
import org.rut.util.algorithm.support.SelectionSort; h[ ZN+M
import org.rut.util.algorithm.support.ShellSort; Wwo0%<2y
+`4A$#$+y
/** lE;!TQj:X
* @author treeroot k6^Z~5 Sy
* @since 2006-2-2 (7Qo
* @version 1.0 S:}7q2:
*/ 7<4qQ.deE
public class SortUtil { u*R_\*j@
public final static int INSERT = 1; Ri'n
public final static int BUBBLE = 2; )7@0[>
public final static int SELECTION = 3; =4!mAo}
public final static int SHELL = 4; \vNU,WO
public final static int QUICK = 5; %O<BfIZ
public final static int IMPROVED_QUICK = 6; xno\s.H%]
public final static int MERGE = 7; Kw}'W 8`c
public final static int IMPROVED_MERGE = 8; KoYF]
public final static int HEAP = 9; }]TxlSp!;
INf&4!&h
public static void sort(int[] data) { 9uY'E'm*
sort(data, IMPROVED_QUICK); E7hhew
} 6@o*xK7L
private static String[] name={ ^.tg7%dJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0x7'^Z>-oe
}; 9L9sqZUB
|{;G2G1[
private static Sort[] impl=new Sort[]{ ^aQ"E9
new InsertSort(), ivPg9J1S
new BubbleSort(), PFR:>^wK2
new SelectionSort(), .hiSw
new ShellSort(), b-y
new QuickSort(), wBzC5T%,
new ImprovedQuickSort(), l0] EX>"E
new MergeSort(), Si,6o!0k
new ImprovedMergeSort(), B *vM0
new HeapSort() E4!Fupkpf
}; .543N<w
~ 1pr~
public static String toString(int algorithm){ Q&&@v4L
return name[algorithm-1]; _m>b2I?
} /=h` L,
Fi1@MG5$2
public static void sort(int[] data, int algorithm) { fnY.ao1-s[
impl[algorithm-1].sort(data); y]imZ4{/
} -&;TA0~;
t Pf40`@
public static interface Sort { r/sNrB1U"y
public void sort(int[] data); 9kojLqCT
} _|]x2xb)
mTh]PPo
public static void swap(int[] data, int i, int j) { 7|D+Ihy;
int temp = data; />Nt[o[r
data = data[j]; +3`alHUK
data[j] = temp; ':}\4j&{E
} 2(nlJ7R
} fatf*}eln