[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; 8ne'x!1 D
} _Ux>BJmP
int i1=l; AUoi$DF(@
int i2=mid+1; QE!cf@~n"
for(int cur=l;cur<=r;cur++){ |82V`CV
if(i1==mid+1) 8pDJz_F!{
data[cur]=temp[i2++]; .Rc&EO
else if(i2>r) ^F`FB..:y
data[cur]=temp[i1++]; 4ej$)AdW3
else if(temp[i1] data[cur]=temp[i1++]; r7*[k[^[^
else ~srmlBi6
data[cur]=temp[i2++]; + 7E6U*
} /D8cJgH-
} +zs;>'Sf
<g,k[
} O(/K@e
2Pi}<pG~
改进后的归并排序: 5jy>)WqK
MH"c=mL:
package org.rut.util.algorithm.support; I|9e4EX{y
l},px
import org.rut.util.algorithm.SortUtil; sj. eJX"z
Um15@p;
/** vn0XXuquzC
* @author treeroot yQ+#Tlji
* @since 2006-2-2 m98k/w_
* @version 1.0 EE&~D~yHUL
*/ :n'QNGj
public class ImprovedMergeSort implements SortUtil.Sort { ,)GCg@7B
gNLjk4H,S[
private static final int THRESHOLD = 10; Ks X@e)8u
j@kBCzX
/* {(7.X4\x
* (non-Javadoc) q97Dn[>3
* +#Ov9b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _BtlO(0&
*/ _V:D7\Gs
public void sort(int[] data) { S~/iHXm
int[] temp=new int[data.length]; Ylt[Ks<2
mergeSort(data,temp,0,data.length-1); %F&j B
} B7}-g"p$/
S3qUzK
private void mergeSort(int[] data, int[] temp, int l, int r) { g"C$B Fc
int i, j, k; r7ywK9UL
int mid = (l + r) / 2; {Fb)Z"8]
if (l == r) ej%C<0/%n
return; ,fET.s^|U
if ((mid - l) >= THRESHOLD) ,Z>RvLl
mergeSort(data, temp, l, mid); _7$j>xX
else "-<u.$fE
insertSort(data, l, mid - l + 1); "5dh]-m n
if ((r - mid) > THRESHOLD) Fl*@@jQ8cV
mergeSort(data, temp, mid + 1, r); >454Yir0Mk
else T| 4c\
insertSort(data, mid + 1, r - mid); L?9Vz&8]
m>NRIEA6
for (i = l; i <= mid; i++) { HSK^vd?_l
temp = data; ]vT
} fRrHWE+
for (j = 1; j <= r - mid; j++) { XJ@ /r,2
temp[r - j + 1] = data[j + mid]; L1rov
} Xx?Jt
int a = temp[l]; k92X)/ll'
int b = temp[r]; C(,s_Ks
for (i = l, j = r, k = l; k <= r; k++) { um3 M4>K
if (a < b) { "_#%W oo
data[k] = temp[i++]; -Qn:6M>w^
a = temp; 0^["&K/
} else { YuPgsJ[m
data[k] = temp[j--]; <o?qpW$,>
b = temp[j]; YT:<AJm
} qU2>V
} C7+TnJ
} %],.?TS2V
'R=o,=
/** &I!2gf
* @param data NoYu"57\
* @param l zo\XuoZ
* @param i ?LNwr[C0
*/ oY.JK
private void insertSort(int[] data, int start, int len) { N(1jm F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L</"m[
} gXw\_ue<
} }#E4t3
} u5R^++
} j/Bzbjq"
2d3wQ)2
堆排序： SxH}/I|W
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package org.rut.util.algorithm.support; /pb7
#Wc)wL-Tg
import org.rut.util.algorithm.SortUtil; bJBx~
3`e1:`Hu
/** ^`dp!1.+
* @author treeroot '!f5|l9SC
* @since 2006-2-2 1.>sG2*P
* @version 1.0 YKM(qh2
*/ Xq)'p8C?
public class HeapSort implements SortUtil.Sort{ >nr1|2
{g )kT_
/* (non-Javadoc) Vq<|DM3z<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0q`'65 lx
*/ 2RE }l=h5
public void sort(int[] data) { BAKfs/N
MaxHeap h=new MaxHeap(); qx!IlO
h.init(data); &12aI|u^<
for(int i=0;i h.remove(); #K)HuT
System.arraycopy(h.queue,1,data,0,data.length); /5J! s="
} R jAeN#,?
;TW@{re
private static class MaxHeap{ ,2kWj7H%7
c"QH-sE
void init(int[] data){ *i$+i
this.queue=new int[data.length+1]; Wq>j;\3b3
for(int i=0;i queue[++size]=data; mU\$piei
fixUp(size); r%B5@+{so
} xMuy[)b
} ]}5jX^j
b?y1cxTT
private int size=0; {'}Ofj
O:Z|fDQ`
private int[] queue; >2C;5ba
<N`rcKE%~P
public int get() { j5/H#_.
return queue[1]; 75v*&-
} hQet?*diU
6Q wL
public void remove() { `zsKc 6%
SortUtil.swap(queue,1,size--); ]mqB&{g
fixDown(1); u>? VD%
} (ZI&'"H
file://fixdown I'yhxymZ;
private void fixDown(int k) { 74[}AA
int j; 1zp,Suv
while ((j = k << 1) <= size) { }h]:I'R!
if (j < size %26amp;%26amp; queue[j] j++; 68_UQ.
if (queue[k]>queue[j]) file://不用交换 )0'O!O
break; <A6<q&g|E
SortUtil.swap(queue,j,k); "3>#[o
k = j; [Q$"+@jw
} -pjL7/gx
} j5HOdy2
private void fixUp(int k) { dm 2_Fj
while (k > 1) { >i ~zG6H
int j = k >> 1; Y}WO`+Vf5
if (queue[j]>queue[k]) Lh,<q >t
break; Jq; }q63:
SortUtil.swap(queue,j,k); /y-P)3_
k = j; X:!%"K%}
} k1cBMDSokO
} #/1Bam6
DV.MvFV
} fcBSs\\C~
y1AS^'
} ^1nf|Xj[
WW_X:N~~e\
SortUtil： #".{i+3E
aY?}4Bx
package org.rut.util.algorithm; P$oa6`%l
oC?b]tzj
import org.rut.util.algorithm.support.BubbleSort; #?,cYh+
import org.rut.util.algorithm.support.HeapSort; ']rh0?
import org.rut.util.algorithm.support.ImprovedMergeSort; :@3d
import org.rut.util.algorithm.support.ImprovedQuickSort; "vJADQ4F
import org.rut.util.algorithm.support.InsertSort; Nyo6R9^
import org.rut.util.algorithm.support.MergeSort; 8uu:e<PLv
import org.rut.util.algorithm.support.QuickSort; >\i{,F=U7
import org.rut.util.algorithm.support.SelectionSort; 0-#ct1-
import org.rut.util.algorithm.support.ShellSort; {C6Yr9
[AGm%o=)
/** REsThB
* @author treeroot " DFg"
* @since 2006-2-2 g 08 `=g
* @version 1.0 iy4JI,-W
*/ (;M"'.C
public class SortUtil { cCeD3CuRA%
public final static int INSERT = 1; WFdS#XfV
public final static int BUBBLE = 2; \:#b9t{B-
public final static int SELECTION = 3; 8<G@s`*
public final static int SHELL = 4; v0y7N_U5n
public final static int QUICK = 5; +pV3.VMH0
public final static int IMPROVED_QUICK = 6; nDo|^{!L`
public final static int MERGE = 7; <0vvlOL5
public final static int IMPROVED_MERGE = 8; 4 IHl'*D[#
public final static int HEAP = 9; +GGj*sD
\"*l:x-u
public static void sort(int[] data) { dEL>Uly
sort(data, IMPROVED_QUICK); K~E]Fkw!;
} Ue\&
private static String[] name={ 2V0R|YUt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f[v??^
}; jc?Hip'
4 I~,B[|
private static Sort[] impl=new Sort[]{ f9rToH
new InsertSort(), WU\):n
new BubbleSort(), \\T I4A^#
new SelectionSort(), p 2i5/Ly
new ShellSort(), n/6A@C
new QuickSort(), (=\P|iv
new ImprovedQuickSort(), C6Mb(&
new MergeSort(), mPu5%%
new ImprovedMergeSort(), z/ i3
new HeapSort() ,=ICSS~9l
}; fvx0]of
V&>7i9lEz
public static String toString(int algorithm){ y^XwJX-f
return name[algorithm-1]; E=B9FIx~<
} COT;KC6 n
*?8Q:@:
public static void sort(int[] data, int algorithm) { b 9?w _
impl[algorithm-1].sort(data); 4VooU [Ka(
} qzLRA.#f^
X}Csl~W8in
public static interface Sort { (0][hdI~B
public void sort(int[] data); oT_,k}LIX
} OW.ckYt%
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public static void swap(int[] data, int i, int j) { v ;9s
int temp = data; W,<Vr2J[
data = data[j]; m&x0,8
data[j] = temp; C +IXP
} 'D-imLV<<
} Nhf!;>