[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; >"d?(@PJ
} oln<yyDs
int i1=l; 7%d8D>uw8
int i2=mid+1; qX6D1X1_
for(int cur=l;cur<=r;cur++){ h9CIZU[Nh
if(i1==mid+1) +^ yq;z
data[cur]=temp[i2++]; 5%i:4sMx *
else if(i2>r) _vl}*/=Hc
data[cur]=temp[i1++]; p/olCmHD)
else if(temp[i1] data[cur]=temp[i1++]; X0uJNHO
else yyP-=Lhmo=
data[cur]=temp[i2++]; .SS<MDcqIt
} r>|-2}{N/
} @;)PSp*j
ht6244:
} vg\/DbI'
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改进后的归并排序: Z4q~@|+%
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package org.rut.util.algorithm.support; pn%#w*'
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import org.rut.util.algorithm.SortUtil; 1>pe&n/
!Q%P%P<$
/** Q{y{rC2P
* @author treeroot 2QUx&u:
* @since 2006-2-2 c:\shAM&
* @version 1.0 2 y8~#*O
*/ q=5l4|1
public class ImprovedMergeSort implements SortUtil.Sort { ?<%=: Yh
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private static final int THRESHOLD = 10; SbT5u3,'
;Yts\4BSM
/* YA&`&$
* (non-Javadoc) T*>`,}J
* 6mPm=I[oh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4s.]M>Yb
*/ X.#oEmA,P
public void sort(int[] data) { ;L"!I3dM)
int[] temp=new int[data.length]; |:[9O`U)s
mergeSort(data,temp,0,data.length-1); Zi ESlf$
} zG9|K
~[W#/kd1n
private void mergeSort(int[] data, int[] temp, int l, int r) { s"~5']8
int i, j, k; PLR0#).n
int mid = (l + r) / 2; s] au/T6b
if (l == r) 4IsG=7
return; Fo|xzLm9*|
if ((mid - l) >= THRESHOLD) w"zE_9I\
mergeSort(data, temp, l, mid); =$^MQ\S0p
else !a-b6Aa
insertSort(data, l, mid - l + 1); mG2'Y)Sz
if ((r - mid) > THRESHOLD) uzU{z;
mergeSort(data, temp, mid + 1, r); Z"v<0]rN
else C/@LZ OEL
insertSort(data, mid + 1, r - mid); I.jZ wW!r
8l+H"M&|
for (i = l; i <= mid; i++) { k*Nr!Z!}
temp = data; raUs%Y3
} (Tvcq
for (j = 1; j <= r - mid; j++) { -n))*.V
temp[r - j + 1] = data[j + mid]; Z~u9VYi!
} uO(w1Q"^
int a = temp[l]; B!S167Op
int b = temp[r]; )u} Q:`9
for (i = l, j = r, k = l; k <= r; k++) { {=Q7m`1
if (a < b) { /yPXMJ6W~R
data[k] = temp[i++]; 7{M>!} rY
a = temp; `E`HVZ}
} else { D4Nu8Wr$
data[k] = temp[j--]; e x?v `9
b = temp[j]; $P {K2"Oc
} {})$ 99"x
} + ,4" u
} e@]-D FG
ff2d@P,!
/** %,V YiW0
* @param data E`;;&V q-
* @param l nb,2,H
* @param i 3MBN:dbQ
*/ |D#2GeBw1h
private void insertSort(int[] data, int start, int len) { MQTdk*L_]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {7"0,2 Hb?
} t#wmAOW
} N$I03m
} 6d|q+]x_n
} 5LW}h^N
! fl4"
堆排序： dF@)M
+}kgQ^
package org.rut.util.algorithm.support; k2^a$k}
j;nb?;
import org.rut.util.algorithm.SortUtil; `dkV_ O0
[xlIG}e9
/** 1y"3
* @author treeroot ^Z,q$Gp~P
* @since 2006-2-2 l* dV\ B
* @version 1.0 vZAv_8S)
*/ 5er@)p_
public class HeapSort implements SortUtil.Sort{ bud&R4+
x?,9_va]
/* (non-Javadoc) Lc2QXeo8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q!lP"J
*/ P,xwSvO#M
public void sort(int[] data) { '+y_\
MaxHeap h=new MaxHeap(); 9^ed-h Bf
h.init(data); KG9t3<-`
for(int i=0;i h.remove(); zc+@lJy
System.arraycopy(h.queue,1,data,0,data.length); J%rP$O$
} XEH}4;C'{
rNN j0zw>
private static class MaxHeap{ uGH?N
LF<wt2?*
void init(int[] data){ -_A$DM!^=w
this.queue=new int[data.length+1]; \Ad7 Gi~
for(int i=0;i queue[++size]=data; kBWrqZ6
fixUp(size); ](0mjE04<d
} Ud%s^A-qS
} =\kMXB
{3\R|tZh,`
private int size=0; wxQ>ifi9Z
/BA{O&Ro^
private int[] queue; ^rAa"p9
+OaUP*\Dd
public int get() { /pH(WHT+/H
return queue[1]; +%*&.@z_
} ODw`E9
h1D?=M\9
public void remove() { |L3X_Me
SortUtil.swap(queue,1,size--); xhs#u
fixDown(1); #KpY6M-H
} eny/ fm
file://fixdown m.Lij!0
private void fixDown(int k) { B;#J"6w
int j; @4+#Xd7"
while ((j = k << 1) <= size) { ~Qj}ijWD
if (j < size %26amp;%26amp; queue[j] j++; HTjkR*E
if (queue[k]>queue[j]) file://不用交换 B|Wk?w.{r\
break; :3ZYJW1
SortUtil.swap(queue,j,k); b'p4wE>
k = j; "jg@w%~
} " {dek
} #CUzuk&
private void fixUp(int k) { QV|>4^1D
while (k > 1) { 1+kE!2b;b
int j = k >> 1; mqtg[~dNc
if (queue[j]>queue[k]) Zk-~ar
break; f i~I@KJ>
SortUtil.swap(queue,j,k); #(;<-7M2
k = j; :%rS =f
} rfcN/:k
} k-LEI}h
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} /%rq hHs
\1%l^dE@
} ,T{<vRj7_
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SortUtil： VRng=,
-%c<IX>z9
package org.rut.util.algorithm; 6cS>bl
X*eW#|$\
import org.rut.util.algorithm.support.BubbleSort; w|Cx>8P8@
import org.rut.util.algorithm.support.HeapSort; uBnoQ~Qd[z
import org.rut.util.algorithm.support.ImprovedMergeSort; K!z`
import org.rut.util.algorithm.support.ImprovedQuickSort; kQ>^->w
import org.rut.util.algorithm.support.InsertSort; AC%JC+
import org.rut.util.algorithm.support.MergeSort; MHj,<|8Q
import org.rut.util.algorithm.support.QuickSort; |pZUlQbb
import org.rut.util.algorithm.support.SelectionSort; m"2d$vro"
import org.rut.util.algorithm.support.ShellSort; (K..k-o`.
E)N<lh
/** 1`bl&}6l|E
* @author treeroot I s57F4[}
* @since 2006-2-2 IND]j72
* @version 1.0 i&Fiq&V)[
*/ 9]'&RyH=#
public class SortUtil { {jKI^aC<[
public final static int INSERT = 1; aG`;OgrH
public final static int BUBBLE = 2; G5.nPsuM
public final static int SELECTION = 3; =duks\)O
public final static int SHELL = 4; ,Ds.x@p
public final static int QUICK = 5; Z=S>0|`R
public final static int IMPROVED_QUICK = 6; ;az5ZsvN D
public final static int MERGE = 7; bJ /5|E?
public final static int IMPROVED_MERGE = 8; _D7]-3uC!
public final static int HEAP = 9; m#e3%150{
{D&9UZm
public static void sort(int[] data) { UL@9W6
sort(data, IMPROVED_QUICK); s,]%dG!
} v;1F[?@3Y
private static String[] name={ n'FwM\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J%C#V}z7E
}; KDP H6
C(T;>if0NH
private static Sort[] impl=new Sort[]{ U977#MXf
new InsertSort(), tAu4haa4;
new BubbleSort(), rNOES3[~
new SelectionSort(), Ard]147
new ShellSort(), =}!Mf'
new QuickSort(), #uCB)n&.
new ImprovedQuickSort(), o(kM9G|
new MergeSort(), E6B!+s!]
new ImprovedMergeSort(), 9O.YOiW
new HeapSort() uGN^!NG-0
}; XM1`x
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public static String toString(int algorithm){ cE'L% Z
return name[algorithm-1]; y3u+_KY-
} 0U/,aHvhP
sW#JjtK
public static void sort(int[] data, int algorithm) { PCrU<J 7
impl[algorithm-1].sort(data); }G<T:(a
} `lDut1J5n
P(k(m<0
public static interface Sort { %^.%OCX:
public void sort(int[] data); yL4 T
} -Y 9SngxM
V%0I%\0Y
public static void swap(int[] data, int i, int j) { zSvgKmNY
int temp = data; *u6Y8IL1
data = data[j]; e-hjC6Q U
data[j] = temp; a&{X!:X
} i+3fhV
} mog[pu:!,