[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; ^dF?MQA<@
} cK(S{|F
int i1=l; CHPu$eu
int i2=mid+1; CVyE5w
for(int cur=l;cur<=r;cur++){ OLS.0UEc
if(i1==mid+1) [Q5>4WY
data[cur]=temp[i2++]; a J&)-ge
else if(i2>r) 3Bk_4n
data[cur]=temp[i1++]; @L ,hA v^
else if(temp[i1] data[cur]=temp[i1++]; 4)XZ'~|
else 2!+saf^-,
data[cur]=temp[i2++]; sF`ELrR \
} &n)=OConge
} +7]]=e<[E
g~i%*u,Y<
} +jPs0?}s
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改进后的归并排序: zJ2dPp~u
sAG#M\A6
package org.rut.util.algorithm.support; 9nrH 6]
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import org.rut.util.algorithm.SortUtil; AQH\ ;L
97%S{_2m/
/** dq&N;kk |
* @author treeroot ^t'mfG|DV
* @since 2006-2-2 :t36]NM
* @version 1.0 PfRe)JuB
*/ "ApVgNB
public class ImprovedMergeSort implements SortUtil.Sort { 8IX,q
xy$agt>j>
private static final int THRESHOLD = 10; KiDL]2
XpLK0YI
/* L\u6EMyV
* (non-Javadoc) cU^Z=B
* L&WhX3$u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Pl}>
*/ \q0wY7w
public void sort(int[] data) { zFn-VEJ)
int[] temp=new int[data.length]; '%2q'LqSA
mergeSort(data,temp,0,data.length-1); CPto?=*A
} >*A"tk#oR
K~ 6[zJ4
private void mergeSort(int[] data, int[] temp, int l, int r) { <lBY
int i, j, k; -t:~d:
int mid = (l + r) / 2; %xq/eC7
if (l == r) ;MH<T6b
return; 6/Pw'4H9$
if ((mid - l) >= THRESHOLD) hrRkam!y
mergeSort(data, temp, l, mid); +l "z
else t69C48}15
insertSort(data, l, mid - l + 1); G{ 9p.Q
if ((r - mid) > THRESHOLD) ?IWLH-fkP
mergeSort(data, temp, mid + 1, r); Sl?@c/Ng
else m1mA:R\zM
insertSort(data, mid + 1, r - mid); #BK3CD(&
2Bf]#l{z
for (i = l; i <= mid; i++) { GjmPpKIu\
temp = data; $T)EJe
} Sas&P:#r
for (j = 1; j <= r - mid; j++) { $i^#KZ}-WK
temp[r - j + 1] = data[j + mid]; 2th>+M~A
} M:4N'#`
int a = temp[l]; dZ1/w0<M2
int b = temp[r]; rX-V0
for (i = l, j = r, k = l; k <= r; k++) { B`Q~p92
if (a < b) { z)Is:LhS
data[k] = temp[i++]; QR+{Yp
a = temp; t=IpVl!
} else { S8{Sb>
data[k] = temp[j--]; Aw38Tw
b = temp[j]; bP4<q?FKcN
} 'k?%39
} R*v~jR/
} yO7xAb
m3cO{ 1I
/** a2{nrGD
* @param data ?-y!FD}m&
* @param l 9 2e?v8
* @param i Od?M4Ed(
*/ Hkcr+BQ
private void insertSort(int[] data, int start, int len) { <K$X>&Ts
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kFJ sB,2-
} 7~2/NU?
} Zr&~gXmVS
} jP]I>Tq
} 3kl<~O|Fs
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堆排序： rM sd)
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package org.rut.util.algorithm.support; V8aLPJ0_
((2 g
import org.rut.util.algorithm.SortUtil; h;^H*Y&`
2W}f|\8MX
/** 3M;[.b
* @author treeroot FXHcy:)}G
* @since 2006-2-2 {Q&@vbw'
* @version 1.0 zjzW;bo( d
*/ Eagl7'x
public class HeapSort implements SortUtil.Sort{ >O{[w'sWa
7lo`)3mB
/* (non-Javadoc) k3-'!dW<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;oKN8vI#7
*/ :f~[tox
public void sort(int[] data) { IsaL+elq|
MaxHeap h=new MaxHeap(); 9rB,7%@EL
h.init(data); AjTkQ)
for(int i=0;i h.remove(); 44uM:;
System.arraycopy(h.queue,1,data,0,data.length); #hA]r.
} S690Y]:h$v
h\jV@g$
private static class MaxHeap{ wTpjM@F?J|
* 5H
void init(int[] data){ /``4!jU
this.queue=new int[data.length+1]; [>B`"nyNQ
for(int i=0;i queue[++size]=data; DE{tpN
fixUp(size); Kc6p||<
} 2WP73:'t
} i.|zKjF'
rQ^X3J*`
private int size=0; y?ps+ce93
OZ/P@`kN.f
private int[] queue; Pl@3=s!~>~
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public int get() { D!K){E
return queue[1]; h)W?8XdM
} (XQBBt
[hLSK-K 9
public void remove() { BCw5.@HK*
SortUtil.swap(queue,1,size--); x1gfo!BN
fixDown(1); n/ \{}9
} ,qx;kJJ
file://fixdown B,@<60u
private void fixDown(int k) { _TB,2 R
int j; _K4Igq
while ((j = k << 1) <= size) { l5> H\
if (j < size %26amp;%26amp; queue[j] j++; JGJXV3AT
if (queue[k]>queue[j]) file://不用交换 =F(fum;zH
break; %n^jho5
SortUtil.swap(queue,j,k); /M:R|91:_
k = j; %0>DjzYt
} $ BEIG@qG
} e{ce \
private void fixUp(int k) { 2:31J4t-<
while (k > 1) { ]kJinXHW
int j = k >> 1; sH//*y
if (queue[j]>queue[k]) &rTOJ1)V}
break; U]Iypl`l
SortUtil.swap(queue,j,k); To x{Sk3L
k = j; SJYy,F],V"
} QKj-"y[
} `zr%+
r%M.rYLG{
} mkA1Sh{hX>
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} u7rA8u|TO
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SortUtil： XZ@;Tyn0,
lJ+05\pE
package org.rut.util.algorithm; =}:9y6QR.
On[:]#
import org.rut.util.algorithm.support.BubbleSort; mA ^[S.!
import org.rut.util.algorithm.support.HeapSort; \#(3r1(
import org.rut.util.algorithm.support.ImprovedMergeSort; th@a./h"
import org.rut.util.algorithm.support.ImprovedQuickSort; 6x1!!X+)+
import org.rut.util.algorithm.support.InsertSort; X8F@U ^@
import org.rut.util.algorithm.support.MergeSort; }y<p_dZI
import org.rut.util.algorithm.support.QuickSort; yPgDb[V+
import org.rut.util.algorithm.support.SelectionSort; 7pB5o2CD0
import org.rut.util.algorithm.support.ShellSort; n*tT<
2EG`
/** *O>OHX
* @author treeroot n:hHm,
* @since 2006-2-2 ~!*xi
* @version 1.0 byj}36LN62
*/ JGP<'6"L$
public class SortUtil { NVEjUt/
public final static int INSERT = 1; +-~:E_G
public final static int BUBBLE = 2; WaU+ZgDrG
public final static int SELECTION = 3; #WBlEVx;Z
public final static int SHELL = 4; MYQZqlV
public final static int QUICK = 5; 'A0.(a5
public final static int IMPROVED_QUICK = 6; -ZTe#@J
public final static int MERGE = 7; 6mP s;I
public final static int IMPROVED_MERGE = 8; kB|jN~
public final static int HEAP = 9; 111s%
XIM!]
public static void sort(int[] data) { 5XSr K
sort(data, IMPROVED_QUICK); U@W3x@
} ~9&#7fU
private static String[] name={ ]0`*gKA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R{s&6
}; "62vwWrwO
(=v :@\r
private static Sort[] impl=new Sort[]{ V SJGp`
new InsertSort(), tb^8jC
new BubbleSort(), Nm{\?
new SelectionSort(), .ZuRH_pI
new ShellSort(), r(ej=aR
new QuickSort(), )ZxDfRjL
new ImprovedQuickSort(), "O{_LOJ
new MergeSort(), nz72w_
new ImprovedMergeSort(), hE|Z~5\Y,>
new HeapSort() p.{M sn
}; {H]xA3[]
h28")c.pH=
public static String toString(int algorithm){ gyqM&5b
return name[algorithm-1]; /}G+PUk7
} kA`Z#yu
/.Yf&2X\
public static void sort(int[] data, int algorithm) { gB4&pPN
impl[algorithm-1].sort(data); z/IA @
} #fq%903=
?hpT"N,hF9
public static interface Sort { \#LkzN8
public void sort(int[] data); cL31g_u
} XCCh*qym
m3Mo2};?
public static void swap(int[] data, int i, int j) { F`/-Q>Q
int temp = data; VMry$
data = data[j]; g"k1O
data[j] = temp; 8>T#sO?+
} Y ^s_v_s
} |eN#9Bm