[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; *4Cq,o`o>
} ,{A-<=6t
int i1=l; S+A'\{f
int i2=mid+1; (Vglcj
for(int cur=l;cur<=r;cur++){ f_X]2in
if(i1==mid+1) l?v-9l M
data[cur]=temp[i2++]; >bWsUG9
else if(i2>r) L3P_
data[cur]=temp[i1++]; VZ{aET!
else if(temp[i1] data[cur]=temp[i1++]; SlI0p&2,
else WK]SHiHD
data[cur]=temp[i2++]; LX[J6YKR
} e!b?SmNN
} _H(m4~M
?c0OrvM
} 2`/JT
/o#!9H
改进后的归并排序: |U%S<X
lq=|=
package org.rut.util.algorithm.support; 8 ZD1}58U4
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import org.rut.util.algorithm.SortUtil; gbM#jhQ
"TA r\;[
/** :<4:h.gO8
* @author treeroot nk9Kq\2f:
* @since 2006-2-2 Z{7lyEzBg
* @version 1.0 Fyoy)y*
*/ RRig
public class ImprovedMergeSort implements SortUtil.Sort { $A,fO~
R:kNAtK
private static final int THRESHOLD = 10; Q3,`'[ F
!tBNA
/* *IUw$|Z6z)
* (non-Javadoc) {C Qo}@.7
* ~` v7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P|YBCH
*/ iJuh1+6:c9
public void sort(int[] data) { !xyO
int[] temp=new int[data.length]; tJo,^fdfv
mergeSort(data,temp,0,data.length-1); \]=qGMwFs
} 6*%3O=*
4Waot
private void mergeSort(int[] data, int[] temp, int l, int r) { Oi+(`
int i, j, k; (-Rh%ZHH
int mid = (l + r) / 2; ^^QW<
if (l == r) #$7 z
return; X9C)FS
if ((mid - l) >= THRESHOLD) ]uO8
mergeSort(data, temp, l, mid); | iEhe
else iD,iv
insertSort(data, l, mid - l + 1); LyO,]
if ((r - mid) > THRESHOLD) J"'2zg1&
mergeSort(data, temp, mid + 1, r); ~(kIr?^
else /WXy!W30<
insertSort(data, mid + 1, r - mid); Y\luz`v
p% ESp&
for (i = l; i <= mid; i++) { "H\'4'hg
temp = data; Bi2be$nV
} ;%P$q9*C
for (j = 1; j <= r - mid; j++) { +hL+3`TD#H
temp[r - j + 1] = data[j + mid]; hM\<1D CKG
} c'?4*O
int a = temp[l]; 4Z>hP]7
int b = temp[r]; q/-8sO}q
for (i = l, j = r, k = l; k <= r; k++) { }7YDe'5V
if (a < b) { z:<mgp&/<
data[k] = temp[i++]; dk~h
a = temp; 0mo^I==J1
} else { D(xgadr
data[k] = temp[j--]; , "w`,c>!
b = temp[j]; r(NfVQF
} y]QG;
} hWpn~q
} '(A)^K>+
T0n=nC}<
/** /'?Fz*b
* @param data ""l_&3oz
* @param l ]z`Y'wSxd
* @param i G%~=hEK0
*/ .kh%66:
private void insertSort(int[] data, int start, int len) { B$qmXA)ze
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )iadu
} .E:[\H"
} $~c?qU
} Okm&b g
} ?PORPv#
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堆排序： Ai\"w0
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package org.rut.util.algorithm.support; 2h0I1a,7
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import org.rut.util.algorithm.SortUtil; +;SQ}[
Z0T{1YEJ
/** d!/@+i
* @author treeroot k^AI7H
* @since 2006-2-2 iJ_`ZM.w
* @version 1.0 e"(l
*/ o~!4&
public class HeapSort implements SortUtil.Sort{ /9dV!u!;
=1t#$JG
/* (non-Javadoc) c 2j?<F1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q:sDNj)R\
*/ EJY[M
public void sort(int[] data) { -'+|r]
MaxHeap h=new MaxHeap(); en>d T
h.init(data); w] LN(o:
for(int i=0;i h.remove(); *>%34m93
System.arraycopy(h.queue,1,data,0,data.length); !J!zi
} )l*H$8
?^P#P0
private static class MaxHeap{ lM Gz"cym
*)"U5A/v)
void init(int[] data){ R-]QU`c
this.queue=new int[data.length+1]; ep<Ad
for(int i=0;i queue[++size]=data; vai.",b=n6
fixUp(size); +kTAOfM
} d_#\^!9
} m>2b %GTh
xG0IA 7
private int size=0; {n%-^9b1{&
|o~<Ti6]
private int[] queue; "T5?<c
^T"9ZBkb
public int get() { uHBX}WH
return queue[1]; 8yax.N j
} 0K7]<\)
3 2Q/4
public void remove() { >bxT_qEm
SortUtil.swap(queue,1,size--); VpMpZ9oM<
fixDown(1); nS[0g^}
} C-]H+p
file://fixdown D2|-\vJ>
private void fixDown(int k) { u,[Yaw"L
int j; |s|>46E
while ((j = k << 1) <= size) { E*IkI))X0
if (j < size %26amp;%26amp; queue[j] j++; Mo &Ia6^
if (queue[k]>queue[j]) file://不用交换 $/,qw
break; |DfYH~@(
SortUtil.swap(queue,j,k); 0*VRFd4
k = j; R?1;'pvpa[
} {>OuxVl??k
} <oV _EZ
private void fixUp(int k) { AQ. Y-'\t
while (k > 1) { C]*9:lK
int j = k >> 1; <Sm -Z,|
if (queue[j]>queue[k]) _Pa(5-S'KR
break; R+lKQAyC0=
SortUtil.swap(queue,j,k); UY j
k = j; J/w?Fa<
} 2j-|.l c
} KJ,{w?p~ )
B:ddlxT$
} 2tCep
!l~tBJr*sB
} s['F?GWg
nlHH}K
SortUtil： aMuc]Wy#
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package org.rut.util.algorithm; -,q&Zm
s!Y>\3rMW
import org.rut.util.algorithm.support.BubbleSort; Um;ReJ8z
import org.rut.util.algorithm.support.HeapSort; f'Wc_L)
import org.rut.util.algorithm.support.ImprovedMergeSort; w|>:mQnU
import org.rut.util.algorithm.support.ImprovedQuickSort; ko im@B
import org.rut.util.algorithm.support.InsertSort; m^U\l9LE
import org.rut.util.algorithm.support.MergeSort; RoM'+1nP:#
import org.rut.util.algorithm.support.QuickSort; PmvTCfsg
import org.rut.util.algorithm.support.SelectionSort; INW8Q`[F
import org.rut.util.algorithm.support.ShellSort; Sl^HMO
Mb3,!
/** &xr?yd
* @author treeroot RK/SeS
* @since 2006-2-2 6;dB
* @version 1.0 J\_tigd
*/ mn*.z!N=
public class SortUtil { $b\Gl=YX^
public final static int INSERT = 1; :Ff1Js(Z
public final static int BUBBLE = 2; X)fj&
public final static int SELECTION = 3; \PU|<Ru.
public final static int SHELL = 4; V.'EP
public final static int QUICK = 5; |g> K$m^
public final static int IMPROVED_QUICK = 6; yXc/Nl%
public final static int MERGE = 7; &kXf)xc<~
public final static int IMPROVED_MERGE = 8; Cf<i"
public final static int HEAP = 9; Eo)Q> AM
?&)<h_R4p
public static void sort(int[] data) { tLS5yT/
sort(data, IMPROVED_QUICK); hX$k8 o0
} -}9ZZ#K
private static String[] name={ r@"Vbq%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" oO$a4|&,
}; xlqRW"
AmRppbj/wO
private static Sort[] impl=new Sort[]{ 1A< O Z>
new InsertSort(), fseHuL=~
new BubbleSort(), _tb)F"4V
new SelectionSort(), 6~&4>2b0f
new ShellSort(), !(w\%$|
new QuickSort(), MJ8z"SKnV
new ImprovedQuickSort(), ;,JCA# N
new MergeSort(), f`RcfYt
new ImprovedMergeSort(), _yJd@
new HeapSort() K)sO
}; p/cVQ
cDxjD5E
public static String toString(int algorithm){ K S,X$)9
return name[algorithm-1]; u(\b1h n
} Ue^upx
-_%n\#
public static void sort(int[] data, int algorithm) { IpB0~`7YI
impl[algorithm-1].sort(data); zRD{"uqi
} @PU%BKe
}PK8[N
public static interface Sort { * "~^k^_b}
public void sort(int[] data); 9H" u\t|?
} 4Xe3PdE
F9]GEBLr
public static void swap(int[] data, int i, int j) { BQ)zm
int temp = data; 3O:Z;YP:<
data = data[j]; JyjS#BWi
data[j] = temp; ZvkO#j
} ^bexXYh
} ]}w~fjq