[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; `ZELw=kLL
} nR#'BBlI
int i1=l; qV&ai{G:
int i2=mid+1; _fmOTz G
for(int cur=l;cur<=r;cur++){ 9zac[tno
if(i1==mid+1) J=7<dEm&
data[cur]=temp[i2++]; NxzRVsNF
else if(i2>r) mJFFst,
data[cur]=temp[i1++]; 1_RN*M+#
else if(temp[i1] data[cur]=temp[i1++]; ~z&Ho
else 9{Xh wi)z
data[cur]=temp[i2++]; cK _:?G
} nZP%Z=p7
} 2y` :#e`x1
_]q%Hve
} =CGB}qU l0
r6:c<p[c
改进后的归并排序: ]<<+#Rg
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package org.rut.util.algorithm.support; o)SA^5
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import org.rut.util.algorithm.SortUtil; NWt5)xl
Ou,Eu05jt'
/** &8'QD~
* @author treeroot aX,ux9#
* @since 2006-2-2 k`;&??
* @version 1.0 jQRl-[n
*/ h$#zuqm
public class ImprovedMergeSort implements SortUtil.Sort { g'nN#O
wfY]J0l
private static final int THRESHOLD = 10; ,`.`}'
yr,Oq~e
/* wW1>#F
* (non-Javadoc) !dZpV~g0
* a/s6|ri`0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ; +%|!~
*/ O$$$1VHYo
public void sort(int[] data) { NUb:5tL
int[] temp=new int[data.length]; +8eW/Bs@2
mergeSort(data,temp,0,data.length-1); l.AG^b
} QoTjKck.
3oE3bBj
private void mergeSort(int[] data, int[] temp, int l, int r) { "u.4@^+i
int i, j, k; [>xGynU0
int mid = (l + r) / 2; M%@=BT
if (l == r) ]YqeI*BX
return; [bZASeh
if ((mid - l) >= THRESHOLD) <lFQ4<"m
mergeSort(data, temp, l, mid); #`Gh8n#
else Zg2F%f$Y
insertSort(data, l, mid - l + 1); +:m'a5Dm
if ((r - mid) > THRESHOLD) gW_^GrKpI
mergeSort(data, temp, mid + 1, r); UCDvN
else u[yUUYe
insertSort(data, mid + 1, r - mid); ?KF.v1w7
}5{#f`Ca6
for (i = l; i <= mid; i++) { XJ9bY\>)q1
temp = data; `|d&ta[{
} ?> SH`\
for (j = 1; j <= r - mid; j++) { o:C],G_
temp[r - j + 1] = data[j + mid]; DX)T}V&mP
} 3|g]2|~w@h
int a = temp[l]; mbCY\vEl
int b = temp[r]; 2%oo.?!R
for (i = l, j = r, k = l; k <= r; k++) { {nl4(2$
if (a < b) { =`y.L5
data[k] = temp[i++]; *3r{s'm
a = temp; a eo/4
} else { BR[f{)a5
data[k] = temp[j--]; 6yRxb(
b = temp[j]; W$_@9W(Bl
} Tx!c}
} kTe0"
} ;.wWw" )
XkJzt
/** qGgqAF#B
* @param data l: X]$2;
* @param l w+Cs=!
* @param i |e#ea~/b
*/ a}]zwV&
private void insertSort(int[] data, int start, int len) { ]/C1pG*o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yg-uL48q
} `fUem,$)1F
} {V{*rq<)
} K;}h u(*\]
} |Y42ZOK0
SOPQg?'n=V
堆排序： %`Q<_LTU
-A A='s
package org.rut.util.algorithm.support; T-L;iH~0
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import org.rut.util.algorithm.SortUtil; kb>/R/,9
gbJz5EEq
/** TtaVvaz~>
* @author treeroot )^o7%KX
* @since 2006-2-2 QX$i ]y%S
* @version 1.0 .5PcprE/
*/ ixFuqPij
public class HeapSort implements SortUtil.Sort{ &%/kPF~<
d;kdw
/* (non-Javadoc) E?/Bf@a28=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e2?7>?
*/ !SFF 79$c
public void sort(int[] data) { R;*3";+v|:
MaxHeap h=new MaxHeap(); RW@sh9
h.init(data); k 8Swra?j
for(int i=0;i h.remove(); L*VO2YI
System.arraycopy(h.queue,1,data,0,data.length); Jc:gNQCsP
} -r!N; s$t
k^IC"pUc
private static class MaxHeap{ Jm+hDZrW
!a[1rQH
void init(int[] data){ ]zza/O;31(
this.queue=new int[data.length+1]; oKJj?%dHK9
for(int i=0;i queue[++size]=data; _e;$Y#`EO
fixUp(size); z$d/Vz,a
} ,\FJVS;NeJ
} B0^0d*8t|@
B0KZdBRx}
private int size=0; mt+IB4`
Rj|8lK;,
private int[] queue; ;J[1S
4oF8F)ASj
public int get() { 3PEv.hGx
return queue[1]; cIO7RD$8
} $Qv+*%c
JWa9[Dj
public void remove() { <[H1S@{W
SortUtil.swap(queue,1,size--); 0.~Pzg
fixDown(1); I]]3=?Y
} \I@=EF- &
file://fixdown IQS:tL/
private void fixDown(int k) { "(hhb>V1Wl
int j; R^.oM1qu|
while ((j = k << 1) <= size) { =-`}(b2N
if (j < size %26amp;%26amp; queue[j] j++; XM$HHk}L;
if (queue[k]>queue[j]) file://不用交换 Q`qHzb~%
break; O6^>L0'
SortUtil.swap(queue,j,k); S3[rv
k = j; +oZq~2?*S6
} K.Tfu"6
} Xz'pZ*Hr$v
private void fixUp(int k) { ?Mg&e/^
while (k > 1) { ()Z!u%j
int j = k >> 1; `5:Wv b>|
if (queue[j]>queue[k]) !79^M
break; wjF/c
SortUtil.swap(queue,j,k); h7NS9CgO
k = j; 9=j"kXFf
} 2NLD7A
} S;[*5g6a&x
%&+j(?9
} &k /uR;yw
*v[WJ"8@
} gv}Esps R
z O
SortUtil： +-=w`
+zQ a"Ep*
package org.rut.util.algorithm; X ?/C9
,%#FK|
import org.rut.util.algorithm.support.BubbleSort; YK/?~p9:
import org.rut.util.algorithm.support.HeapSort; .$/Su3]K/
import org.rut.util.algorithm.support.ImprovedMergeSort; 1nb]~{l
import org.rut.util.algorithm.support.ImprovedQuickSort; l@a>"\><i*
import org.rut.util.algorithm.support.InsertSort; CBAMAr
import org.rut.util.algorithm.support.MergeSort; ]A:n]mL
import org.rut.util.algorithm.support.QuickSort; GqXnOmk
import org.rut.util.algorithm.support.SelectionSort; {H+~4XG
import org.rut.util.algorithm.support.ShellSort; >;eWgQ6V
\ %Er%yv)
/** {(@M0?
* @author treeroot X !g"D6'
* @since 2006-2-2 84UH& b'n
* @version 1.0 G};os+FxF
*/ _\YBB=Os
public class SortUtil { 05mjV6j7m
public final static int INSERT = 1; %O`e!p
public final static int BUBBLE = 2; #Jv|zf5Z
public final static int SELECTION = 3; 6fhH)]0
public final static int SHELL = 4; 0Zp) DM
public final static int QUICK = 5; Y '&&1R
public final static int IMPROVED_QUICK = 6; ~6z<tyD^
public final static int MERGE = 7; 5A,@$yp+
public final static int IMPROVED_MERGE = 8; W3s>+yU
public final static int HEAP = 9; V?Y;.n&y
"d60IM#N?
public static void sort(int[] data) { 'c3P3`o,;
sort(data, IMPROVED_QUICK); &v7$*n27
} cXiNO ke&
private static String[] name={ _5(lp} s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" FUic7>
}; luYkC@I@a
XBE+O7
private static Sort[] impl=new Sort[]{ A*jU&3#
new InsertSort(), M=$ qus
new BubbleSort(), :DTKZ9>2D
new SelectionSort(), 095:"GvO
new ShellSort(), tLXwszR0r
new QuickSort(), #T1py@b0zA
new ImprovedQuickSort(), YIv!\`^ \
new MergeSort(), ezn%*X y,
new ImprovedMergeSort(), MaDdiyeC
new HeapSort() 3 f=_F
}; fvn`$
wQ /IT}-
public static String toString(int algorithm){ 'thWo wE
return name[algorithm-1]; 1zwk0={x-%
} q}[g/%
W($}G_j[B1
public static void sort(int[] data, int algorithm) { qRkY-0vBP
impl[algorithm-1].sort(data); 'NyIy:
} (_h<<`@B
C7#ji"t
public static interface Sort { o!W 71
public void sort(int[] data); ol QT r
} ]v&)mK]n=o
\vj<9ke&
public static void swap(int[] data, int i, int j) { #zflU99d
int temp = data; ru#,pJ=O(
data = data[j]; p4QQ5O$;
data[j] = temp; qdkhfm2(K
} .)L%ANf
} \c1u$'|v