[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; VgL<uxq
} r]{:{Z
int i1=l; ;kA2"c]m
int i2=mid+1; Ok\UIi~
for(int cur=l;cur<=r;cur++){ wEyh;ID3#
if(i1==mid+1) [c~zO+x
data[cur]=temp[i2++]; }=5(*Vg
else if(i2>r) J{I?t~u
data[cur]=temp[i1++]; p! 1zhD
else if(temp[i1] data[cur]=temp[i1++]; 2Hj]QN7"
else )VrHP9fu
data[cur]=temp[i2++]; -K4RQ{=>UZ
} " 8v
} +bU(-yRy5o
)JON&~C
} XZJx3!~fm
+(T,d]o]
改进后的归并排序: :}cAq/
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package org.rut.util.algorithm.support; ?:c hAN@
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import org.rut.util.algorithm.SortUtil; eP8wTStC
cA,xf@itp
/** ,0O!w>u_]J
* @author treeroot 6|x<)Gc
* @since 2006-2-2 O,PHAwVG%L
* @version 1.0 Q}]un]]Zt
*/ 4}`MV.
public class ImprovedMergeSort implements SortUtil.Sort { ?e*vvu33!
eyOAG4QTV
private static final int THRESHOLD = 10; f}A^rWO
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/* -)/>qFj)
* (non-Javadoc) iZF{9@
* w@R-@ G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;+\;^nS3d
*/ /V~(!S>
public void sort(int[] data) { Fej$`2mRH
int[] temp=new int[data.length]; ?Eed#pb_
mergeSort(data,temp,0,data.length-1); ?IWS
} H.e@w3+h
,;g:qe3D$
private void mergeSort(int[] data, int[] temp, int l, int r) { l\)Q3.w
int i, j, k; a+d|9y/k
int mid = (l + r) / 2; Uz6B\-(0p
if (l == r) ]|oqJ2P
return; ?0F#\0
if ((mid - l) >= THRESHOLD) C" {j0X`
mergeSort(data, temp, l, mid); u]"RAH
else )yJjJ:re
insertSort(data, l, mid - l + 1); l}{O
if ((r - mid) > THRESHOLD) (s~hh
mergeSort(data, temp, mid + 1, r); snrfHDhUw
else 1'iRx,
insertSort(data, mid + 1, r - mid); G(L*8U<UG
Al?XJ C B@
for (i = l; i <= mid; i++) { ZWv$K0agu
temp = data; 1=>$c
} 5 m:nh<)#
for (j = 1; j <= r - mid; j++) { pa7fTd
temp[r - j + 1] = data[j + mid]; Sq,x@
} ^gy(~u
int a = temp[l]; am=56J$ig
int b = temp[r]; "D+QT+sD
for (i = l, j = r, k = l; k <= r; k++) { +KZc"0?
if (a < b) { X~0P+E#
data[k] = temp[i++]; {u7E)Fdl
a = temp; p[RD[&#b
} else { B{Rig5Sc
data[k] = temp[j--]; iJcl0)|
b = temp[j]; V&G_Bu~
} Y\lBPp0{\v
} =1D*K%
} x&sF_<[
({)_[dJ'
/** q /#O :Q
* @param data $O[ut.
* @param l }I]9I _S
* @param i ][.1b@)qV
*/ 3Xy>kG}
private void insertSort(int[] data, int start, int len) { @{j-B IRZ0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); IMBqy-q
} RGcT
} Qx:+n`$/
} XHW{EVcF
} z-,'W`
'Mg%G(3
堆排序： )K}b,X`($
cWm.']
package org.rut.util.algorithm.support; ]uP{Sj
0]T ;{
import org.rut.util.algorithm.SortUtil; 8<P.>u
3B,nHU
/** L\"$R":3{d
* @author treeroot .UJk0%1
* @since 2006-2-2 "5@Y\L
* @version 1.0 cq/)Yff@:
*/ v<O\ l~S
public class HeapSort implements SortUtil.Sort{ <ioX|.7ZX
&#WTXTr0=
/* (non-Javadoc) x9uA@$l^|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iGR(
*/ bf3)^ 49}
public void sort(int[] data) { 4>(?R[:p)
MaxHeap h=new MaxHeap(); #df Aqg'
h.init(data); 371E S4
for(int i=0;i h.remove(); &c A?|(7-
System.arraycopy(h.queue,1,data,0,data.length); 1Eg,iTn2*x
} :D(:(`A=
P0W%30Dh
private static class MaxHeap{ X(bb1
&Zov9o:gx
void init(int[] data){ :QN,T3i'/3
this.queue=new int[data.length+1]; \4V'NTjB
for(int i=0;i queue[++size]=data; GU!|J71z
fixUp(size); am`eist:
} J9/w_,,R$
} f}*Xz.[bCp
iud%X51
private int size=0; )p&xpB(
]J~5{srq:
private int[] queue; I@.qon2V
(|Xf=q,Le
public int get() { A1i-QG/6
return queue[1]; DRw%~
} l.C{Ar
O'(qeN<^w
public void remove() { f3nib8B'
SortUtil.swap(queue,1,size--); i2y?CI
fixDown(1); w+}KX><r
} _,vJ0{*
file://fixdown 5"{wnnY%K}
private void fixDown(int k) { t#kmtJC
int j; 18a6i^7
while ((j = k << 1) <= size) { ? [=P
if (j < size %26amp;%26amp; queue[j] j++; Oyz=|[^,W
if (queue[k]>queue[j]) file://不用交换 dNIY`u
break; fE7Kv_N-%
SortUtil.swap(queue,j,k); vG<Mz?wr
k = j; Dt8eVWkN~
} Y8Mo.v
} <&:3|2p
private void fixUp(int k) { 5-n N8qs
while (k > 1) { @w@rW }i0
int j = k >> 1; wjpkh~qo
if (queue[j]>queue[k]) 7GKeqv
break; IWTD>c).
SortUtil.swap(queue,j,k); DT_012z
k = j; x!S8'
} 10*U2FY)]
} Rnj2Q!C2
6Bs_" P[
} GMksr%0Pj
W.>yIA%
} !1|f,9C
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SortUtil： UGl}=hwKkG
E|#'u^`yv
package org.rut.util.algorithm; 'tF<7\!
K&Zdk (l)
import org.rut.util.algorithm.support.BubbleSort; mh|M O(
import org.rut.util.algorithm.support.HeapSort; S&@~F|
import org.rut.util.algorithm.support.ImprovedMergeSort; B,}%1+*
import org.rut.util.algorithm.support.ImprovedQuickSort; YAsvw\iseK
import org.rut.util.algorithm.support.InsertSort; )\p@E3Uxf
import org.rut.util.algorithm.support.MergeSort; T<P4+#JK
import org.rut.util.algorithm.support.QuickSort; _)lK.5
import org.rut.util.algorithm.support.SelectionSort; DAJh9I
import org.rut.util.algorithm.support.ShellSort; 'M YqCfIK
_Tev503
/** }K0.*+M
* @author treeroot $yRbo'-
* @since 2006-2-2 N/]TZu~k z
* @version 1.0 RtK/bUa
*/ VM|8HR7U
public class SortUtil { rY88xh^
public final static int INSERT = 1; julAN$2
public final static int BUBBLE = 2; {_PV~8u
public final static int SELECTION = 3; R0{+Xd
public final static int SHELL = 4; v^JyVf>
public final static int QUICK = 5; %J3#4gG^v
public final static int IMPROVED_QUICK = 6; B7va#'ne4{
public final static int MERGE = 7; _k _F
public final static int IMPROVED_MERGE = 8; CEt_wKzf
public final static int HEAP = 9; |(Io(e
\U p<m>3\
public static void sort(int[] data) { I5PaY.i
sort(data, IMPROVED_QUICK); 2L ~U^
} lYU_uFOs\
private static String[] name={ RQv`D&u_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ykM(` 1`m
}; W>'R<IY4#N
=v1s@5;~
private static Sort[] impl=new Sort[]{ o KX!{
new InsertSort(), wN"irXG
new BubbleSort(), K@%.T#
new SelectionSort(), 6<FJ`l]U9
new ShellSort(), E9QNx62
new QuickSort(), 7vgz=- MZ#
new ImprovedQuickSort(), dEns|r
new MergeSort(), si0jXue~j\
new ImprovedMergeSort(), XW`&1qx
new HeapSort() ^i#F+Q`1
}; 6SW:'u|90
SbrBlP:G
public static String toString(int algorithm){ liPUK#
return name[algorithm-1]; ^hTq~"
} YgrBIul
'^}l|(
public static void sort(int[] data, int algorithm) { Ch^Al2)=
impl[algorithm-1].sort(data); G,$RsP
} GiI2nHZc
c7'I'~
public static interface Sort { q48V|6X'q
public void sort(int[] data); 6d`6=D:
} 7_n@iUG2n
M {_`X
public static void swap(int[] data, int i, int j) { KYd2=P6
int temp = data; @I#@%"AW
data = data[j]; ppfBfMX
data[j] = temp; L)4TW6IUk
} B4_0+K H
} X|@|ZRN