[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; \4&FW|mx
} kN$L8U8f
int i1=l; ,lw<dB@7"5
int i2=mid+1; o#F03
for(int cur=l;cur<=r;cur++){ /J'dG%
if(i1==mid+1) A\<WnG>xjP
data[cur]=temp[i2++]; Y&DC5T]
else if(i2>r) fpvzx{2
data[cur]=temp[i1++]; E%>){Y)
else if(temp[i1] data[cur]=temp[i1++]; _:l<4u!
else J""N:X!1
data[cur]=temp[i2++]; q,eXH8 x
} ;AgXl%Q
} \J^|H@;(@
\6v*c;ZF
} E- rXYNfy
(`Q_^Bfyl
改进后的归并排序: "G!V?~;
:#p!&Fi
package org.rut.util.algorithm.support; wz]OM
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import org.rut.util.algorithm.SortUtil; Ci^tP~)&"
@T+pQ)0{{
/** +Pm}_"GU
* @author treeroot +0O^!o
* @since 2006-2-2 :n<<hR0d
* @version 1.0 dNcP_l/A
*/ ;/-#oW@gQ
public class ImprovedMergeSort implements SortUtil.Sort { kzb1iBe 6m
iG;GAw|E
private static final int THRESHOLD = 10; We,~P\g
j!<RY>u
/* gL;tyf1P
* (non-Javadoc) r`(U3EgP
* sp$W=Wu7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GPnSdGLC
*/ >P\/\xL=
public void sort(int[] data) { ZN?UkFnE
int[] temp=new int[data.length]; ,b8q$R~\
mergeSort(data,temp,0,data.length-1); tvG/oe .1'
} .%EEly
t Sf`
private void mergeSort(int[] data, int[] temp, int l, int r) { hgi9%>oUB
int i, j, k; c/E6}OWA
int mid = (l + r) / 2; VR9C< tMSi
if (l == r) i&?do{YQ)
return; &4O0}ax*Zm
if ((mid - l) >= THRESHOLD) qjp<_aw
mergeSort(data, temp, l, mid); :V#W y
else x?|
insertSort(data, l, mid - l + 1); p#dpDjh
if ((r - mid) > THRESHOLD) Wc)f:]7
mergeSort(data, temp, mid + 1, r); +Ss|4O}'
else W:16qbK
insertSort(data, mid + 1, r - mid); j/xL+Y(=
!(<Yc5
for (i = l; i <= mid; i++) { URD<KIN>
temp = data; -3T6ck
} K)"cwk-
for (j = 1; j <= r - mid; j++) { eqze7EY
temp[r - j + 1] = data[j + mid]; \WVrn>%xu
} UN}jpu<h
int a = temp[l]; xdH*[
int b = temp[r]; ]OOL4=b
for (i = l, j = r, k = l; k <= r; k++) { 0oi =}lV
if (a < b) { \'40u|f
data[k] = temp[i++]; RT)*H>|
a = temp; ' cl&S:
} else { 5? s$(Lt~
data[k] = temp[j--]; V/G'{ q
b = temp[j]; ZrFC#wJb
} 8?r ,ylUj
} a|im DY_-j
} DN@T4!
$Y4;Xe=
/** )5j%."
* @param data dEp?jJP$;
* @param l }X3SjNd q
* @param i vO2o/
*/ 0VB~4NNR
private void insertSort(int[] data, int start, int len) { +`x8[A)-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Osdw\NNH~M
} ?b~Vuo
} [S/]Vk|4
} ]64mSB
} *_z5Pa`A
NVMhbpX6
堆排序： rnVh ]xJ
h*Y);mc$#
package org.rut.util.algorithm.support; 8vM}moper
{qCmZn5
import org.rut.util.algorithm.SortUtil; +M6qbIO
8eSIY17
/** *Ki ],>_~
* @author treeroot E VBB:*q6
* @since 2006-2-2 +]Y&las
* @version 1.0 +t R6[%
*/ {7)D/WY5
public class HeapSort implements SortUtil.Sort{ !0~$u3[b
Fr)G h>
/* (non-Javadoc) +QIM~tt)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) por[p\M.
*/ ]iuM2]
public void sort(int[] data) { O=#FpPHrdw
MaxHeap h=new MaxHeap(); g`!:7|&,_
h.init(data); J8$G-~MeJ
for(int i=0;i h.remove(); DLkNL?a
System.arraycopy(h.queue,1,data,0,data.length); $@t-Oor;
} 31y=Ar""
ubIGs|p2c
private static class MaxHeap{ V,($I'&/
92GO.xAD?
void init(int[] data){ p IXBJk
this.queue=new int[data.length+1]; 5yO6szg
for(int i=0;i queue[++size]=data; j3rBEQ,R
fixUp(size); o)7gKWjujP
} s!09Pxc
} h@T}WZv
Pt?]JJxl-
private int size=0; DEaO=p|
*lg1iP{]
private int[] queue; Zg|z\VR
Z^>[{|lIA
public int get() { m u(HNj
return queue[1]; %lchz/
} W 0Q-&4
X|H%jdta
public void remove() { su(y*187A
SortUtil.swap(queue,1,size--); 0iW]#O/
fixDown(1); &eT)c<yhyK
} 'N],d&fu^^
file://fixdown Uq&ne1
private void fixDown(int k) { @YP\!#"8
int j; f8)D|
while ((j = k << 1) <= size) { b1jh2pG(V
if (j < size %26amp;%26amp; queue[j] j++; 0i9y-32-
if (queue[k]>queue[j]) file://不用交换 jNV2o
break; 'z2}qJJ)
SortUtil.swap(queue,j,k); UnZ*"%
k = j; ( =->rP
} wYhWRgP
} y>u+.z a|
private void fixUp(int k) { gy _86y@
while (k > 1) { ~-Rr[O=E
int j = k >> 1; V#|#% 8
if (queue[j]>queue[k]) R)t"`'6|
break; @?{n`K7{`
SortUtil.swap(queue,j,k); f 5_n2
k = j; L._I"g5 H9
} J /'woc
} q,2]]K7y
`|i #)
} B}gi /
nbw&+dcJ8
} x$AF0xFO
qJFBdJU(1
SortUtil： O%A:2Y79
Nc[>CgX"@
package org.rut.util.algorithm; ~o%|#-S
oDx*}[/
import org.rut.util.algorithm.support.BubbleSort; +GgWd=X.Y
import org.rut.util.algorithm.support.HeapSort; ji`N1e,l
import org.rut.util.algorithm.support.ImprovedMergeSort; BXaA#} ;e
import org.rut.util.algorithm.support.ImprovedQuickSort; ,>2ijk#
import org.rut.util.algorithm.support.InsertSort; EKk~~PhW 8
import org.rut.util.algorithm.support.MergeSort; {.z2n>1J{T
import org.rut.util.algorithm.support.QuickSort; e6k}-<W*q
import org.rut.util.algorithm.support.SelectionSort; |t|+pBB
import org.rut.util.algorithm.support.ShellSort; z['>`Kt
*4r 1g+0
/** ];^A8?
* @author treeroot RM-|?%
* @since 2006-2-2 NyJU?^f&v
* @version 1.0 Wk'KN o
*/ k _hiGg
public class SortUtil { 18Pc4~>0
public final static int INSERT = 1; IO`.]iG
public final static int BUBBLE = 2; >f19P+
public final static int SELECTION = 3; ;Mc\>i/
public final static int SHELL = 4; 75@){ :
public final static int QUICK = 5; !~m)_Q5?~
public final static int IMPROVED_QUICK = 6; BkJV{>?_+
public final static int MERGE = 7; HLAWx/c,j"
public final static int IMPROVED_MERGE = 8; 3ZU`}
public final static int HEAP = 9; \S}&QV
&m`1lxT
public static void sort(int[] data) { -Uq I=#
sort(data, IMPROVED_QUICK); +e%9P%[+
} Tm_AoZH
private static String[] name={ sZPPS&KoP3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /lm;.7_J+
}; zVZZdG~8
Jj|HeZ1C f
private static Sort[] impl=new Sort[]{ Yp./3b VO
new InsertSort(), n%3rv?m7
new BubbleSort(), /P5w}n
new SelectionSort(), a =*(>=
new ShellSort(), NUEy0pLw
new QuickSort(), OTL=(k
new ImprovedQuickSort(), 5Qo\0YH
new MergeSort(), ~LuZpV
new ImprovedMergeSort(), N/TUcG|m\
new HeapSort() rv&(yA
}; S$+vRX7
,4jkTQ*@2
public static String toString(int algorithm){ <G{m=
return name[algorithm-1]; yd`xmc)
} m-dne/%_
j@v*q\X&
public static void sort(int[] data, int algorithm) { IaH8#3+a
impl[algorithm-1].sort(data); C&,&~^_F
} #!OCEiT_
KFdV_e5lU
public static interface Sort { nyi}~sB
public void sort(int[] data); Av^{$9yl
} f`.8.1Rd
O>wGc8Of\
public static void swap(int[] data, int i, int j) { `ndesP
int temp = data; xSs);XO,
data = data[j]; "L|Ew#
data[j] = temp; @T._
} b>hNkVI
} =;7gxV3;