[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; 5IbCE.>iU
} wif1|!aL
int i1=l; 5.lg*vh
int i2=mid+1; ?8q4texf[
for(int cur=l;cur<=r;cur++){ VgS2_TU
if(i1==mid+1) )00jRuF
data[cur]=temp[i2++]; v3cLU7bi?2
else if(i2>r) /Y[ b8f
data[cur]=temp[i1++]; $I9U.~*
else if(temp[i1] data[cur]=temp[i1++]; [>lQiX
else &H2j3De
data[cur]=temp[i2++]; ?&POVf>
} d26#0Gt-4i
} e/$M6l$Q*4
jm[f|4\
} YOtzja]~
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改进后的归并排序: 0SJ(Ln`0K
c&"1Z/tR
package org.rut.util.algorithm.support; h@Ix9!?+
jgBJs^JgYG
import org.rut.util.algorithm.SortUtil; n%6=w9.%c
\(U|&
/** X|y0pH:S
* @author treeroot <SRo2rjRa
* @since 2006-2-2 hPt=j{aJ%<
* @version 1.0 ^CB@4$!
*/ PrF('PH7i
public class ImprovedMergeSort implements SortUtil.Sort { ucUuhS5
#_zj5B38E
private static final int THRESHOLD = 10; jIWX6
y 48zsm{
/* 0&c<1;
* (non-Javadoc) R[H#av
* Cf@N>N#t)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iGNZC{
*/ M+7jJ?n
public void sort(int[] data) { kMg[YQ]OC
int[] temp=new int[data.length]; avUdvV-
mergeSort(data,temp,0,data.length-1); +d3h @gp
} [V0%=q+R
TIno"tc3
private void mergeSort(int[] data, int[] temp, int l, int r) { gKRlXVS
int i, j, k; |j4;XaG)
int mid = (l + r) / 2; _+ >V(,{G
if (l == r) _FN#Vq2
return; Qi|k,1A0
if ((mid - l) >= THRESHOLD) ,N8SP 'R
mergeSort(data, temp, l, mid); N^jr
else ;B;wU.Y"
insertSort(data, l, mid - l + 1); ?*cCn-|
if ((r - mid) > THRESHOLD) 1z@{4)
mergeSort(data, temp, mid + 1, r); S*H @`Do%d
else \_/dfmlIZ
insertSort(data, mid + 1, r - mid); MFqb_q+
P} Y .
for (i = l; i <= mid; i++) { 8[oZ>7LMzC
temp = data; !)FKF7'
} m2Wi "X(I_
for (j = 1; j <= r - mid; j++) { J?f7!F:8
temp[r - j + 1] = data[j + mid]; :v^OdW
} /Y| <0tq
int a = temp[l]; zn5|ewl@"
int b = temp[r]; hdYd2 j
for (i = l, j = r, k = l; k <= r; k++) { YH&0Vy#c$
if (a < b) { D*ZswHT{y
data[k] = temp[i++]; "1hFx=W+\
a = temp; 'w_Qs~6~{
} else { P@U2Q%\
data[k] = temp[j--]; `=2p6<#z
b = temp[j]; _:!7M^IU
} ;;Jx1Q
} Pe`jNiI
} `Yyi;!+0
`dIwBfg_
/** aO*v"^oF
* @param data tQ`|MO&o
* @param l H1$n6J
* @param i l<yYfGO
*/ Oki{)Ssy
private void insertSort(int[] data, int start, int len) { "fu@2y4^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *4c5b'u
} I~,bZA
} _BG7JvI
} ~zQxfl/
} xU |8.,@
[!`5kI
堆排序： )-\qo#0l
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package org.rut.util.algorithm.support; -6# _t
~g*5."-i
import org.rut.util.algorithm.SortUtil; ;G*)7fi
]qiX"<s>~C
/** `{Fz
* @author treeroot 2FR5RG oD
* @since 2006-2-2 5e&;f
* @version 1.0 Rp6q)
*/ =|H.r9-PK6
public class HeapSort implements SortUtil.Sort{ }w{E<C(M
x}#N?d
/* (non-Javadoc) [x -<O:r=P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {N@Pk[!
*/ G}@a]EGm
public void sort(int[] data) { )g`~,3G
MaxHeap h=new MaxHeap(); t<e3EW@>>
h.init(data); &@'+h* b
for(int i=0;i h.remove(); @GF3g=
System.arraycopy(h.queue,1,data,0,data.length); a?*pO`<J{
} *C.Kdf3w
}|l7SFst
private static class MaxHeap{ c,}VC-
jwheJG
void init(int[] data){ }l_8~/9
this.queue=new int[data.length+1]; n'!x"O7
for(int i=0;i queue[++size]=data; Au*1-
fixUp(size); c~!ETwpHQ
} .>Fpk7
} 877Kv);
pMoza8
private int size=0; ;&MnPFmq
`k(m2k?
private int[] queue; 8[:G/8VI
/`j2%8^N
public int get() { M%7|7V<o)^
return queue[1]; TNF
} C#L|7M??;
q XB E3
public void remove() { Yh{5O3(;
SortUtil.swap(queue,1,size--); $ SZIJe"K
fixDown(1); <Ik5S1<h$H
} #It!D5A
file://fixdown lLI%J>b@
private void fixDown(int k) { *pyC<4W
int j; ?5wsgP^
while ((j = k << 1) <= size) { .p(r|5(b
if (j < size %26amp;%26amp; queue[j] j++; WZ UeW*#=
if (queue[k]>queue[j]) file://不用交换 LVdtI
break; nIqF:6/
SortUtil.swap(queue,j,k); A:5P
k = j; X,D ]S@
} w{GEWD{&
} kB=5=#s
private void fixUp(int k) { _WI~b
while (k > 1) { ZHCrKp
int j = k >> 1; iDYm4sY
if (queue[j]>queue[k]) M%s!qC+
break; )/Oldyp
SortUtil.swap(queue,j,k); SBY0L.
k = j; 3;R`_#t+
} D!i|KI/
} ,q$2D,dz
{*nE8+..A
} \\35} 9
XnRm9%
} ^MVOaV65
o5G]|JM_
SortUtil： *p|->p6,u
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package org.rut.util.algorithm; !e('T@^u6u
,I:[-|Q
import org.rut.util.algorithm.support.BubbleSort; hPUZ{#;n
import org.rut.util.algorithm.support.HeapSort; ?"@SxM~\
import org.rut.util.algorithm.support.ImprovedMergeSort; {ea*dX872:
import org.rut.util.algorithm.support.ImprovedQuickSort; Zt 1nH
import org.rut.util.algorithm.support.InsertSort; H7f Xg
import org.rut.util.algorithm.support.MergeSort; wV,=hMTd&\
import org.rut.util.algorithm.support.QuickSort; qJw\<7m
import org.rut.util.algorithm.support.SelectionSort; 2FGCf} ,
import org.rut.util.algorithm.support.ShellSort; ?i}wm`
*=77|Dba
/** |C>\ku*
* @author treeroot -o57"r^x
* @since 2006-2-2 1U ='"
* @version 1.0 ~eUv.I/
*/ ^c|0?EH
public class SortUtil { m~F ~9&
public final static int INSERT = 1; 0\+$j5;
public final static int BUBBLE = 2; ac8su0
public final static int SELECTION = 3; )4H0Bz2G
public final static int SHELL = 4; ,? Q1JZPy@
public final static int QUICK = 5; 8DFq eY0S
public final static int IMPROVED_QUICK = 6; !k#N] 9D3
public final static int MERGE = 7; |@hyGu-H+
public final static int IMPROVED_MERGE = 8; @Y#TWt#
public final static int HEAP = 9; ,,-j5Y
m*v@L4t(1
public static void sort(int[] data) { z]j_,3Hff
sort(data, IMPROVED_QUICK); UN:cRH{?*
} HN<e)E38
private static String[] name={ ?yA 2N;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _V` QvnT}
}; eYPIZ{S7h
Gz7,g Y
private static Sort[] impl=new Sort[]{ &+/$~@OK
new InsertSort(), Zm#,Ike?#
new BubbleSort(), RI BB*
new SelectionSort(), +:u &]
new ShellSort(), NSQ)lSW,;
new QuickSort(), M*dou_Q
new ImprovedQuickSort(), FQcm=d_s
new MergeSort(), Z-aB[hE
new ImprovedMergeSort(), Q|f)Awe$
new HeapSort() :kXxxS
}; zF&_9VNk=c
.iST!nh
public static String toString(int algorithm){ =HMuAUa.
return name[algorithm-1]; ;!EEzR.
} ppO!v?
*k0;R[IAV
public static void sort(int[] data, int algorithm) { aI\]R:f,
impl[algorithm-1].sort(data); U)1hC^[!
} 6lwWFR+k
+@<@x4yt
public static interface Sort { zZV9`cqZ{
public void sort(int[] data); Gn<e&|4>i}
} pzU:AUW
'JAe=K H
public static void swap(int[] data, int i, int j) { l#]+I YD
int temp = data; pH0MVu(W
data = data[j]; v&`n}lS
data[j] = temp; E,[v%Xw
} s$/Z+"f(
} 4rD&Lg'