[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; z@!^ow)`J
} B;eW/#`
int i1=l; ')C|`(hs
int i2=mid+1; `]K,'i{R
for(int cur=l;cur<=r;cur++){ d@-wi%,^
if(i1==mid+1) X$BXT
data[cur]=temp[i2++]; u=vh Z%A]
else if(i2>r) uDILjOT
data[cur]=temp[i1++]; ]dd[WHA
else if(temp[i1] data[cur]=temp[i1++]; =MMCf0
else 'oC$6l'rQ
data[cur]=temp[i2++]; mYjf5
} -"F0eV+y
} j: <t
-{!&/;Z
} BwJNi6,
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改进后的归并排序: /ca(a\@R
+d=~LQ}*
package org.rut.util.algorithm.support; %h0D)6j
!loO%3_)
import org.rut.util.algorithm.SortUtil; {U(Bfe^a,
ab{;Z5O
/** @|^jq
* @author treeroot gC0;2
* @since 2006-2-2 +q7qK*
* @version 1.0 !2(.$}E
*/ _]P a>8X*
public class ImprovedMergeSort implements SortUtil.Sort { pXssh
Bk+{}
private static final int THRESHOLD = 10; uLF\K+cz
m79m{!q$-
/* j^:b-:F
* (non-Javadoc) {3jm%ex
* *pmoLiuB>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iFY]0@yt
*/ Tm0?[[3hC
public void sort(int[] data) { dV'6m@C
int[] temp=new int[data.length]; zjzqKdy}F
mergeSort(data,temp,0,data.length-1); |P^ikx6f5
} PsacXZNs\N
^a: Saq-}
private void mergeSort(int[] data, int[] temp, int l, int r) { \z<ws&z3`$
int i, j, k; hn*}5!^
int mid = (l + r) / 2; hrUm}@d
if (l == r) PpI+@:p[
return; ,%& LG],6
if ((mid - l) >= THRESHOLD) aU,0gvI(}
mergeSort(data, temp, l, mid); Mp}!+K
else t"jIfU>'a/
insertSort(data, l, mid - l + 1); 17?NR\Q
if ((r - mid) > THRESHOLD) 6yV5Yjs
mergeSort(data, temp, mid + 1, r); rerUM*0
else _:/Cl9~
insertSort(data, mid + 1, r - mid); Ih9ORp7
My`josJ`Pb
for (i = l; i <= mid; i++) { XY&]T'A
temp = data; 1mvu3}ewx
} T +|J19
for (j = 1; j <= r - mid; j++) { lyMJW}T+>
temp[r - j + 1] = data[j + mid]; eUGmns
} eHfG;NsV/
int a = temp[l]; 0jl:Yzo&\
int b = temp[r]; OgzGkc@A
for (i = l, j = r, k = l; k <= r; k++) { 0%(4G83gw
if (a < b) { 3M`hn4)K
data[k] = temp[i++]; MZ >0K
a = temp; sWqPw}/3>
} else { o}j_eHl{
data[k] = temp[j--]; +3~Gc<OO
b = temp[j]; 0e7O#-
} @eAGN|C5
} `SSP53R(0
} P %U9S
J"a2 @S&
/** * 7zN
* @param data [xp~@5r'
* @param l [|m>vY!
* @param i !<['iM
*/ t6H2tP\AS
private void insertSort(int[] data, int start, int len) { }SJLBy0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *n$m;yI
} qU /Wg
} Npg5Z%+y
} F?+Uar|-a
} %3@RZe
s1*WK&@
堆排序： K_w0+oY a
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package org.rut.util.algorithm.support; OA8b_k~
XQ4^:3Yc
import org.rut.util.algorithm.SortUtil; 2kmna/Qa6
r)Mx.`d!
/** L{o >D"
* @author treeroot #/ gme
* @since 2006-2-2 MIMPJXT#.
* @version 1.0 H?zCIue3
*/ 0I ND9h.%
public class HeapSort implements SortUtil.Sort{ pN^G[
CH R?i1e
/* (non-Javadoc) MM58w3Mz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1PT_1[eAR
*/ 1H2u,{O
public void sort(int[] data) { ss M9t
MaxHeap h=new MaxHeap(); JD\-X(O
h.init(data); _R!!4Hp<Q
for(int i=0;i h.remove(); 4 *2>R8SX~
System.arraycopy(h.queue,1,data,0,data.length); vGLb2Q
} kod_ 1LD
B#V4
private static class MaxHeap{ <xh'@592
] !*
void init(int[] data){ pa> 2JF*
this.queue=new int[data.length+1]; mYs->mg1
for(int i=0;i queue[++size]=data; KX`nHu;
fixUp(size); 9QM"JEu@
} MAhPO!e5.
} /n3&e
2W-NCE%K)T
private int size=0; gSo(PW)
qZ]VS/5A
private int[] queue; z(#hL-{c
(R 2P< Zr
public int get() { O=?X%m #
return queue[1]; {,mRMDEy
} Cot\i\]jv
arH\QPaka'
public void remove() { l$~bkVNL
SortUtil.swap(queue,1,size--); |"E9DD]{
fixDown(1); rls#gw
} Xq)%w#l5?
file://fixdown EF^=3
private void fixDown(int k) { Ol5xyj
int j; :H8L(BsI
while ((j = k << 1) <= size) { CH+&
if (j < size %26amp;%26amp; queue[j] j++; &``oZvuB
if (queue[k]>queue[j]) file://不用交换 WMl^XZO
break; =X'7V}Q}
SortUtil.swap(queue,j,k); Gbm_xEPC
k = j; B]}V$*$\?
} +&8Ud8Q
} =sVt8FWGY
private void fixUp(int k) { 1Moh`
while (k > 1) { 8t \>
int j = k >> 1; k_^/
if (queue[j]>queue[k]) ~TR|Pv
break; oi4Wxcj
SortUtil.swap(queue,j,k); +7OT`e %q
k = j; x#VUEu]8
} u9~J1s<e
} O7*i;$!R
5VoiDM=\c
} j;'Wf[V
:R\v# )C
} GQBN-Qv
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SortUtil： &V{,D))6[
O!Cu.9}
package org.rut.util.algorithm; ,PxQ[CGg
)#Bfd(F
import org.rut.util.algorithm.support.BubbleSort; &bK$!8Z
import org.rut.util.algorithm.support.HeapSort; PzkXrDlB7
import org.rut.util.algorithm.support.ImprovedMergeSort; *9wHH-#
import org.rut.util.algorithm.support.ImprovedQuickSort; Q8:ocEhR
import org.rut.util.algorithm.support.InsertSort; DN0b.*[`3
import org.rut.util.algorithm.support.MergeSort; DCUq.q)
import org.rut.util.algorithm.support.QuickSort; *lO+^\HXD
import org.rut.util.algorithm.support.SelectionSort; SnU{ZGR>sP
import org.rut.util.algorithm.support.ShellSort; Xe+FMbBco
?{")Wt
/** BQg]$Tr?
* @author treeroot E1g$WhXIS
* @since 2006-2-2 dF]8>jBOL
* @version 1.0 H2cc).8"
*/ +N_%|!F-c
public class SortUtil { [ Ulo; #P
public final static int INSERT = 1; %;?3A#
public final static int BUBBLE = 2; +[`%b3Nk
public final static int SELECTION = 3; XjU;oh4:.
public final static int SHELL = 4; XLxr~Yo
public final static int QUICK = 5; _S1uJ~j;E
public final static int IMPROVED_QUICK = 6; 9%6`ZS~3
public final static int MERGE = 7; ^u,x~nPXg
public final static int IMPROVED_MERGE = 8; XS/TYdXB8
public final static int HEAP = 9; Jl ?Q}SB
f'U]Ik;Jy
public static void sort(int[] data) { J< M;vB)
sort(data, IMPROVED_QUICK); 0yNlf-O
} &X(-C9'j
private static String[] name={ L9)&9 /f
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "Fiv ]^
}; /d'u1FnA=
wv-8\)oA
private static Sort[] impl=new Sort[]{ JY16|ia
new InsertSort(), )_?$B6hf,&
new BubbleSort(), q(W@=-uDK
new SelectionSort(), 1[]cMyV
new ShellSort(), ZeZwzH)BD
new QuickSort(), hNy S
new ImprovedQuickSort(), k#n=mm'N9
new MergeSort(), %-CC_R|0$
new ImprovedMergeSort(), pnU g:R@
new HeapSort() vxx3^;4p
}; a=dN.OB}F7
DM95Il[/
public static String toString(int algorithm){ p2K9R4
return name[algorithm-1]; H"l'E9k.&p
} JhcS
Y)`+u#` R
public static void sort(int[] data, int algorithm) { y]_DW6W
impl[algorithm-1].sort(data); }d(6N&;"zN
} aJ5R0Y,
rpmDr7G
public static interface Sort { }0G Ab2
public void sort(int[] data); i}19$x.D`
} BR'|hG
KX`,7-
public static void swap(int[] data, int i, int j) { 2OTpGl
int temp = data; d,)L,J
data = data[j]; $BY{:#a]
data[j] = temp; rL=$WxdPU
} %}[??R0
} *)<tyIHd