[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; [KwwhI@3
} QjwCY=PK!
int i1=l; {m<!-B95
int i2=mid+1; G3t 4$3|
for(int cur=l;cur<=r;cur++){ 0B~Q.tyP
if(i1==mid+1) @7<m.?A!
data[cur]=temp[i2++]; 9:6d,^X
else if(i2>r) *gXm&/2*
data[cur]=temp[i1++]; 7S9Q{
else if(temp[i1] data[cur]=temp[i1++]; 1Na@|yY
else z;tI D~Y
data[cur]=temp[i2++]; p{A}pnjf
} HSUI${<
} 2&mGT&HAVA
z4%uN|V
} ipnV$!z
HAzBy\M{
改进后的归并排序: 2jJmE&)7,
s9;#!7ms
package org.rut.util.algorithm.support; 6 gL=u-2
Rk<@?(l!6x
import org.rut.util.algorithm.SortUtil; E51dV:l
}_/Hdmmx
/** q%n6K
* @author treeroot gN8hJG'0
* @since 2006-2-2 $,=6[T!z+e
* @version 1.0 AN:sQX`
*/ !%+2Yifna
public class ImprovedMergeSort implements SortUtil.Sort { jd]s<C3o
"xI"
private static final int THRESHOLD = 10; aimarU
6k{2 +P
/* ,_aM`%q?Fj
* (non-Javadoc) <P[T!gST
* bK"SKV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i$G;f^Z!Y
*/ ( 9!k#
public void sort(int[] data) { h+p*=|j`
int[] temp=new int[data.length]; u@'0Vk0zGH
mergeSort(data,temp,0,data.length-1); :NHH Dl
} xJ^>pg8
$n^MD_1!
private void mergeSort(int[] data, int[] temp, int l, int r) { {e[%;W%c&
int i, j, k; =!O*/6rz
int mid = (l + r) / 2; /tV/85r
if (l == r) 'FlJpA}
return; 6=4wp?
if ((mid - l) >= THRESHOLD) El_wdbbT
mergeSort(data, temp, l, mid); H&1[nU{?>
else ORGD
insertSort(data, l, mid - l + 1); >z;[2n'
if ((r - mid) > THRESHOLD) fH`P[^N
mergeSort(data, temp, mid + 1, r); =ph&sn$;L
else CTt vyr
insertSort(data, mid + 1, r - mid); 0nn okN^
x";w%
for (i = l; i <= mid; i++) { t*z~5_/
temp = data; 'E/*d2CDM(
} 0iULCK
for (j = 1; j <= r - mid; j++) { H9h@sSg
temp[r - j + 1] = data[j + mid]; IEKU-k7}Z
} !TZhQiorC
int a = temp[l]; s+Fi @lg,
int b = temp[r]; iHwLZ[O{
for (i = l, j = r, k = l; k <= r; k++) { UNijFGi
if (a < b) { =PRx?q`d
data[k] = temp[i++]; ] h-,o R?e
a = temp; q)H1pwxD
} else { u p.Q>28r
data[k] = temp[j--]; l Z#o+d2Y
b = temp[j]; lzw3=H
} ,NnhHb2\
} rG#Z=*b%
} /? r?it
>AoK/(yL.
/** L;gO;vO
* @param data Cm$.<CV
* @param l gu#-O?B
* @param i o,U9}_|A
*/ JnHo9K2.
private void insertSort(int[] data, int start, int len) { !d<"nx[2`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k(zsm"<q
} ?9l [y
} $0bjKy
} 6KD `oUx
} <%xS{!'}
kb[P\cRa
堆排序： iA8U Yd3Q
V"p!Bf
package org.rut.util.algorithm.support; >zDF2Y[
[M.f-x:
import org.rut.util.algorithm.SortUtil; }2K$^uR
kYzC#.|1
/** SyAvKd`g
* @author treeroot y5Tlpi`g
* @since 2006-2-2 jiF?fX@
* @version 1.0 h~C.VJWl
*/ 8$(Dz]v|[&
public class HeapSort implements SortUtil.Sort{ !61Pl/uQ
!LkWzn3
/* (non-Javadoc) PW3GL3+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ypJ".
*/ p>_;^&>&
public void sort(int[] data) { Vy_2.
MaxHeap h=new MaxHeap(); JG9`h#
h.init(data); VmzbZTup
for(int i=0;i h.remove(); 5{n*"88
System.arraycopy(h.queue,1,data,0,data.length); 5K|"\
} Ed9Z9
}I@L}f5N
private static class MaxHeap{ )DYI .
"t^URp3
void init(int[] data){ hJzxbr <
this.queue=new int[data.length+1]; <hwy*uBrD
for(int i=0;i queue[++size]=data; a0Ik`8^`
fixUp(size); FgLrb#
} _fZZ_0\Q
} WK="J6K5
*^([ ~[
private int size=0; ',GS#~
4t)%<4
private int[] queue; %pXAeeSY`;
cBo{/Tn:
public int get() { }K8/-d6
return queue[1]; wvrrMGU)a
} 7\ nf:.
9CCkqB/
public void remove() { )5|I_PXB
SortUtil.swap(queue,1,size--); ='TE,et@d
fixDown(1); 6sa"O89
} ~G27;Npy
file://fixdown 8foJI^3
private void fixDown(int k) { YC_1Ks
int j; ;<0LXYL;
while ((j = k << 1) <= size) { 'R&uD~Q
if (j < size %26amp;%26amp; queue[j] j++; VXR]"W=
if (queue[k]>queue[j]) file://不用交换 iS5W>1]
break; u*qV[y5Bl
SortUtil.swap(queue,j,k); rp5(pV7*
k = j; BUwONF
} RxMH!^
} ORu2V#Z[
private void fixUp(int k) { -{`@=U
while (k > 1) { |Yq$sU
int j = k >> 1; c{[q>@y pK
if (queue[j]>queue[k]) `bc;]@"
break; TNQP"9[?
SortUtil.swap(queue,j,k); l3nrEk
k = j; }8;[O 9
} V'w@rc\XN
} w&xDOyW]
O$IjNx
} m^x6>9,
au,t%8AC
} ^<X@s1^#
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SortUtil： .(Qx{r$
,RN:^5 p
package org.rut.util.algorithm; "QvmqI>
QMEcQV>
import org.rut.util.algorithm.support.BubbleSort; (|wz7AY2
import org.rut.util.algorithm.support.HeapSort; R0oKbs{
import org.rut.util.algorithm.support.ImprovedMergeSort; :{(w3<i
import org.rut.util.algorithm.support.ImprovedQuickSort; $<ld3[l i
import org.rut.util.algorithm.support.InsertSort; ~^+0
import org.rut.util.algorithm.support.MergeSort; W d0NT@
import org.rut.util.algorithm.support.QuickSort; \P1=5rP
import org.rut.util.algorithm.support.SelectionSort; WoxwEi1~0
import org.rut.util.algorithm.support.ShellSort; 0j C3fT!n
M`6y@<
/** h5yzwj:C?
* @author treeroot :UJa&$)
* @since 2006-2-2 wCk~CkC?
* @version 1.0 P]z[v)}
*/ ]jpu,jz:
public class SortUtil { wp7!>%s{
public final static int INSERT = 1; }-~T<egF
public final static int BUBBLE = 2; 4Z|vnj)Z
public final static int SELECTION = 3; ~SSU`
public final static int SHELL = 4; $`Ix:gi
public final static int QUICK = 5; @AYRiOodi
public final static int IMPROVED_QUICK = 6; J~(Wf%jM~
public final static int MERGE = 7; 7^T^($+6s&
public final static int IMPROVED_MERGE = 8; 0EJ(.8hwm
public final static int HEAP = 9; WL{(Ob
US
public static void sort(int[] data) { hQNe;R5
sort(data, IMPROVED_QUICK); ;l}- Z@! /
} 1n\ t+F
private static String[] name={ _e9:me5d"$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?JxbSK#
}; "`[!Lz
tTU=+*Io
private static Sort[] impl=new Sort[]{ e$Y[Z{T5
new InsertSort(), .Yw'oYnS
new BubbleSort(), F]O$(7*
new SelectionSort(), ZtHm\VTS
new ShellSort(), lD{Aa!\
new QuickSort(), ?uMQP NYs
new ImprovedQuickSort(), {D g_?._d
new MergeSort(), HHjt/gc}`
new ImprovedMergeSort(), Lr`1TH,
new HeapSort() DQwGUF'(
}; y$<Vha
ttXjn
public static String toString(int algorithm){ L,;D@Xi
return name[algorithm-1]; N N|u_
} yPw'] "
Tlj:%yK2
public static void sort(int[] data, int algorithm) { fm~kM J
impl[algorithm-1].sort(data); 7RDDdF E!
} eiJ2NwR\w
wM_c48|d
public static interface Sort { hXGwP4
public void sort(int[] data); /*Qq[C
} *-s,. F+c
OiDhJ
public static void swap(int[] data, int i, int j) { 8>/Q1(q0
int temp = data; #P#-xz
data = data[j]; b|zg<
data[j] = temp; e?bYjJq
} 76.{0c
} +h_ !0dG