[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; F* #h9 Y
} 16@);Ot
int i1=l; K@@9:T$
int i2=mid+1; jxy1
for(int cur=l;cur<=r;cur++){ (3md:r<-
if(i1==mid+1) ,.g}W~S)
data[cur]=temp[i2++]; 0k?Sq#7q
else if(i2>r) Yb=6C3l@
data[cur]=temp[i1++]; %{STz
else if(temp[i1] data[cur]=temp[i1++]; ;o$;Z4:.D
else 67J*&5? |
data[cur]=temp[i2++]; 64D%_8#m
} 'Kis hXOn]
} B4O6>'
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} h39e)%x1
q{X T
改进后的归并排序: G[q9A$yw
DuF7HTN[K
package org.rut.util.algorithm.support; rR!U;
<pOl[5v]
import org.rut.util.algorithm.SortUtil; +p?hGoF=
cw+g z!!
/** \$;~74}
* @author treeroot k,X74D+
* @since 2006-2-2 lA{(8sKN
* @version 1.0 Igjr~@#
*/ @\~tHJ?hQd
public class ImprovedMergeSort implements SortUtil.Sort { ] C,1%(
a9[<^
private static final int THRESHOLD = 10; 6+8mV8{-8
j@C0af
/* *mV&K\_
* (non-Javadoc) /p$=Cg[K
* bm}+}CJ@#0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M@O2 WB1ws
*/ ih!~G5Xi9i
public void sort(int[] data) { 4p x_ZD#J
int[] temp=new int[data.length]; qG^_c;l6a
mergeSort(data,temp,0,data.length-1); J"bD\%
} OMd# ^z
fN0bIE Y
private void mergeSort(int[] data, int[] temp, int l, int r) { u0BMyH
int i, j, k; VV\Xb31J
int mid = (l + r) / 2; 4OEKx|:5n
if (l == r) +@>:%yX
return; \[k%)_
if ((mid - l) >= THRESHOLD) <N5rv3 s
mergeSort(data, temp, l, mid); {~nvs4X
else jIZ+d;1
insertSort(data, l, mid - l + 1); K>LpN')d
if ((r - mid) > THRESHOLD) aG Ef#A
mergeSort(data, temp, mid + 1, r); RnSm]}?
else /4H[4m]I
insertSort(data, mid + 1, r - mid); fwH`}<o
#~1wv^
for (i = l; i <= mid; i++) { =Pj@g/25u
temp = data; V*~423
} '&)D>@g
for (j = 1; j <= r - mid; j++) { Y.9~Bo<<r
temp[r - j + 1] = data[j + mid]; \KNdZC?V2
} 4$F:NW,v:)
int a = temp[l]; W'V@
int b = temp[r]; pEkOSG
for (i = l, j = r, k = l; k <= r; k++) { `1$y(w]
if (a < b) { eB7>t@ED
data[k] = temp[i++]; v}&#f&q!
a = temp; PC[cHgSYU
} else { T|!D>l'
data[k] = temp[j--]; ru DP529;
b = temp[j]; OFIMi^@
} /4^G34
} o|+E+l9\
} IJldN6&\q
6QW<RXom
/** @7)Z
* @param data l3BD <PB2S
* @param l }U(\~ =D
* @param i 5pB^Y MP
*/ [pr 9 $Jr
private void insertSort(int[] data, int start, int len) { erXy>H[;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *$JB`=Q
} ~~U<
} C(xqvK~p
} Z6NJ)XQy6F
} HRj7n<>L=
([[)Ub$U
堆排序： Lr wINVa
jk K#e$7
package org.rut.util.algorithm.support; }Z"28?
9jqO/_7R+
import org.rut.util.algorithm.SortUtil; P$6W`^DZ
DL %S(l
/** +O&RBEa[
* @author treeroot 3Ca \`m)l
* @since 2006-2-2 E]\D>[0O
* @version 1.0 #"hJpyW 4V
*/ *Ao2j;
public class HeapSort implements SortUtil.Sort{ qo)Q}0
]bs+:
/* (non-Javadoc) <"hb#Tn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yI3Q|731)
*/ #-}kG"
public void sort(int[] data) { NY.}uZ
MaxHeap h=new MaxHeap(); -l\~p4U
h.init(data); 6#-6Bh)>4
for(int i=0;i h.remove(); dVPq%[J2
System.arraycopy(h.queue,1,data,0,data.length); S&5Q~}{,
} UaH26fWs
:0WkxEY9
private static class MaxHeap{ LKIW*M
VV?]U$
void init(int[] data){ kuWK/6l4
this.queue=new int[data.length+1]; 8$2l^
for(int i=0;i queue[++size]=data; \d `dV0X
fixUp(size); UN-T^
} ,DexJ1
} cSY2#u|v
- P\S>G.
private int size=0; ->#y(}
QpdujtH`
private int[] queue; _L?v6MTj
Aqa6R+c
public int get() { J ZVr&KZN
return queue[1]; z0T`5NG@
} &?KPu?9
tn"Y9 k|
public void remove() { T[i7C3QS
SortUtil.swap(queue,1,size--); x?%rx}h
fixDown(1); )9;(>cdl
} WpXODkQL
file://fixdown B`g<Ge~
private void fixDown(int k) { C_;HaQiu
int j; XD;15a
while ((j = k << 1) <= size) { >E//pr)_Km
if (j < size %26amp;%26amp; queue[j] j++; K)yCrEZ
if (queue[k]>queue[j]) file://不用交换 k)N2+/
break; iifc;62
SortUtil.swap(queue,j,k); JK@izI
k = j; :SpG&\+
} 3S[w'
} =?meO0]y
private void fixUp(int k) { gGtep*k
while (k > 1) { ddUjs8VvJ
int j = k >> 1; LVPt*S=/
if (queue[j]>queue[k]) NWo7wVwc/c
break; L LYHr
SortUtil.swap(queue,j,k); O, bfdc[g4
k = j; L eG7x7n
} '#cT4_D^lI
} |y{;|K
lH#@^i|G
} F|]o9&/<]
l%sp[uqcg
} j33P~H~
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SortUtil： w5dIk]T
1R5\GKF6o
package org.rut.util.algorithm; -4*'WzWr
^}i50SG:y
import org.rut.util.algorithm.support.BubbleSort; 2a._?(k_y
import org.rut.util.algorithm.support.HeapSort; xJ[k#?T'
import org.rut.util.algorithm.support.ImprovedMergeSort; ,<uiitOo
import org.rut.util.algorithm.support.ImprovedQuickSort; .LXh]I*
import org.rut.util.algorithm.support.InsertSort; eZN3H"H
import org.rut.util.algorithm.support.MergeSort; *j_fG$10g
import org.rut.util.algorithm.support.QuickSort; IyG= 7
import org.rut.util.algorithm.support.SelectionSort; a@5xz)
import org.rut.util.algorithm.support.ShellSort; #a7Amh\nT
%!ER@&1f&
/** VgFF+Eg
* @author treeroot M5cOz|j/*R
* @since 2006-2-2 [6,]9|~
* @version 1.0 C>w9 {h
*/ G*vpf~q?
public class SortUtil { _e:5XQ
public final static int INSERT = 1; 1c<CEq:?e%
public final static int BUBBLE = 2; )AnlFO+V
public final static int SELECTION = 3; E&iWtwkz
public final static int SHELL = 4; &J6o$i
public final static int QUICK = 5; jM3Y|}+
public final static int IMPROVED_QUICK = 6; F$6])F
public final static int MERGE = 7; O, ``\(P
public final static int IMPROVED_MERGE = 8; +2;#9aa I
public final static int HEAP = 9; 9z|>roNe
lry&)G=5
public static void sort(int[] data) { `L"p)5H
sort(data, IMPROVED_QUICK); %|D\j-~
} E+^} B/"
private static String[] name={ 7kX7\[zN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #U!(I#^3
}; sO{0hZkc
Z5*(W;;
private static Sort[] impl=new Sort[]{ aCUV[CPw
new InsertSort(), #5ohmp,u
new BubbleSort(), I7q?V1fu4
new SelectionSort(), ,rH)}C<Q+
new ShellSort(), ~7ATt8T
new QuickSort(), shDt&_n
new ImprovedQuickSort(), Cb@S </b
new MergeSort(), <D;H}ef
new ImprovedMergeSort(), w371.84
new HeapSort() !0. 5
}; Hz3 S^o7
#)PGQ)(
public static String toString(int algorithm){ w}bEufU+2
return name[algorithm-1]; cT>z
} "f&i 251
,syA()
public static void sort(int[] data, int algorithm) { bW 86Iw
impl[algorithm-1].sort(data); ];b!*Z
} Zm; +Ku>
,3@15j
public static interface Sort { :`>+f.)
public void sort(int[] data); o. V0iS]
} d'AviW>
G8(i).Q
public static void swap(int[] data, int i, int j) { e@2Vn? 5
int temp = data; l6`d48U
data = data[j]; @rK>yPhf
data[j] = temp; O 44IH`SI
} X,!OWz:[
} L1Cn