[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; #sf1,k5'
} TA"gU8YQ
int i1=l; x\Kt}/97e
int i2=mid+1; wQOIUvd
for(int cur=l;cur<=r;cur++){ "Q1oSpF
if(i1==mid+1) W`jKe-jF
data[cur]=temp[i2++]; zm=|#f
else if(i2>r) 9f3rMPVh(
data[cur]=temp[i1++]; +!-U+W
else if(temp[i1] data[cur]=temp[i1++]; !<5Wi)*
else 4 :M}Vz-
data[cur]=temp[i2++]; TmLfH d
} 1Zgv+.
} N9PEn[t@
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} j=PM]
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改进后的归并排序: Rs "#gT
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package org.rut.util.algorithm.support; Lz`_&&6
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import org.rut.util.algorithm.SortUtil; D#d \1g
SM[VHNr,-
/** NrfAr}v'E
* @author treeroot IMHt#M`
* @since 2006-2-2 LOe l6Ui
* @version 1.0 KzLkT7,y+
*/ `&FfGftc
public class ImprovedMergeSort implements SortUtil.Sort { 6@=ipPCR
mC!^`y)
private static final int THRESHOLD = 10; 2%~+c|TH.)
W$Z8AZ{E
/* 23P7%\
* (non-Javadoc) 8>!-|VSn
* ~p\r( B7G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L?b;TjLe
*/ z/f0.RJ
public void sort(int[] data) { *\$ko)x?c
int[] temp=new int[data.length]; 88A,ll%
mergeSort(data,temp,0,data.length-1); <y,c.\c!
} \kC'y9k
He}"e&K
private void mergeSort(int[] data, int[] temp, int l, int r) { E&> 2=$~
int i, j, k; SBamgc
int mid = (l + r) / 2; jluv}*If
if (l == r) OA&r8WK3
return; Z#s-(wf
if ((mid - l) >= THRESHOLD) /Ca M(^W
mergeSort(data, temp, l, mid); G-Zn-I
else HnY.=_G
insertSort(data, l, mid - l + 1); (%*~5%l\
if ((r - mid) > THRESHOLD) ]N6UY
mergeSort(data, temp, mid + 1, r); 82yfPQ&UI
else XPMvAZL
insertSort(data, mid + 1, r - mid); fs8C ^Ik>~
Ba9"IXKH
for (i = l; i <= mid; i++) { lYy:A%yDT
temp = data; |5\: E}1
} ?)e6:T(
for (j = 1; j <= r - mid; j++) { L^L.;1
temp[r - j + 1] = data[j + mid]; \;!g@?CA
} NtQ#su$
int a = temp[l]; +A2}@k
int b = temp[r]; Q57Z~EsF
for (i = l, j = r, k = l; k <= r; k++) { >&)|fV&4
if (a < b) { eyG[1EEU
data[k] = temp[i++]; }XRRM:B|)(
a = temp; q5>!.v
} else { CZ,2Rq
data[k] = temp[j--]; &&te(DC\
b = temp[j]; 6tup^Rlo;$
} p?x]|`M
} mxTuwx
} U (A#}
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/** kS)|oUK
* @param data k~qZ^9QB~
* @param l g>_d,#F
* @param i /mnV$+BE
*/ C.+:FY.H
private void insertSort(int[] data, int start, int len) { gOkum_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /(Ryh6M
} `5Em: 8 M
} LO)p2[5#R
} T@Th?
} >!#or- C
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堆排序： pY(S]i
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package org.rut.util.algorithm.support; BV]$= e'
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import org.rut.util.algorithm.SortUtil; l1]'3]P(
'#CYw=S+
/** Z8WBOf*~e
* @author treeroot g715+5z[
* @since 2006-2-2 : W0;U
* @version 1.0 VBe&of+
*/ tj[-|h
public class HeapSort implements SortUtil.Sort{ P.O/ZW>g
@<44wMp
/* (non-Javadoc) HkyN$1s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cDh\$7'b
*/ J24H}^~na
public void sort(int[] data) { wyv%c/WlS
MaxHeap h=new MaxHeap(); ]}nX$xy
h.init(data); opqf)C
for(int i=0;i h.remove(); r+}<]?aT>-
System.arraycopy(h.queue,1,data,0,data.length); da5fKK/s
} fx/If
^Rmrre`uU
private static class MaxHeap{ N1X;&qZDd
z2OXCZ*/
void init(int[] data){ 2m2$jp0
this.queue=new int[data.length+1]; {)& b6}2h
for(int i=0;i queue[++size]=data; avxI%%|
fixUp(size); PpR eqmo
} );fPir?+
} Hu$JCB-%
wy?Hp*E
private int size=0; @gihIysf
o^<W3Z
private int[] queue; fG|+!
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public int get() { wbh^ZMQ
return queue[1]; seNH/pRb
} qF4DX$$<
_H$Z}2g<z
public void remove() { )Tad]Hd"W
SortUtil.swap(queue,1,size--); K?,`gCN}v
fixDown(1); Hv|(V3-
} {fu[&@XV
file://fixdown ufS0UD8%H
private void fixDown(int k) { "nC=.5/$
int j; /{nZI_v#
while ((j = k << 1) <= size) { <`*v/D7\02
if (j < size %26amp;%26amp; queue[j] j++; 1DM$FG_Z-
if (queue[k]>queue[j]) file://不用交换 ^%Fn|U\u
break; 7dXh,sD
SortUtil.swap(queue,j,k); luV_
k = j; n_-k <3
} J*]JH{
} =8x-+u5}rK
private void fixUp(int k) { MpLn)
while (k > 1) { .;NoKO7)
int j = k >> 1; ??XtN.]7
if (queue[j]>queue[k]) wm/>_
break; X$ 76#x
SortUtil.swap(queue,j,k); )LE#SGJP
k = j; _<l9j;6
} @wW)#!Mou
} $q$\
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} e}q!m(K]e-
Zz56=ZX*_
} 0p!N'7N
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SortUtil： StM)lVeF
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package org.rut.util.algorithm; DP4l %2m0
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import org.rut.util.algorithm.support.BubbleSort; 'K3%@,O
import org.rut.util.algorithm.support.HeapSort; {m5R=22^
import org.rut.util.algorithm.support.ImprovedMergeSort; LX iis)1
import org.rut.util.algorithm.support.ImprovedQuickSort; ? p^':@=
import org.rut.util.algorithm.support.InsertSort; Y# ?M%I%j
import org.rut.util.algorithm.support.MergeSort; v*EErQML8b
import org.rut.util.algorithm.support.QuickSort; d,%@*v]S
import org.rut.util.algorithm.support.SelectionSort; KS(Ms*k;'
import org.rut.util.algorithm.support.ShellSort; Zj2tQ}N
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/** v@ OM
* @author treeroot _c6 zzGtH
* @since 2006-2-2 =s[P =dU
* @version 1.0 {$^Lb4O[V
*/ /R)(u@jk
public class SortUtil { ?[S{kMb2
public final static int INSERT = 1; "AMsBvzgo
public final static int BUBBLE = 2; bL18G(5
public final static int SELECTION = 3; &?B\(?*
public final static int SHELL = 4; )J!=X`b
public final static int QUICK = 5; /S)&dN`
public final static int IMPROVED_QUICK = 6; T|lyjX$Q]9
public final static int MERGE = 7; zd#/zUPI
public final static int IMPROVED_MERGE = 8; hOF>Dj
public final static int HEAP = 9; Y%]&h#F
Cr%6c3aQ
public static void sort(int[] data) { Nyo,6 AA
sort(data, IMPROVED_QUICK); &1,qC,:!
} qGc>+!y
private static String[] name={ DSx D531[A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +G>;NiP_
}; Gzu $
t!}?nw%$
private static Sort[] impl=new Sort[]{ Y4n;[nHQ(
new InsertSort(), ~yuj;9m3
new BubbleSort(), 0i65.4sK
new SelectionSort(), jYJfo<
new ShellSort(), $)Pmr1==
new QuickSort(), *`.4M)Ym~
new ImprovedQuickSort(), 3ZU<u;
new MergeSort(), &y=~:1&f
new ImprovedMergeSort(), pM'AhzS
new HeapSort() oFUP`p%[
}; JIyIQg'5i
LuIs4&[EW
public static String toString(int algorithm){ \m;"KyP+
return name[algorithm-1]; xT1{O`
} D^W?~7e^r
Z]Iyj 97
public static void sort(int[] data, int algorithm) { OM 5h>\9
impl[algorithm-1].sort(data); haMt2S2_B:
} za@`,Yq
{BKr/) H
public static interface Sort { H&zhYKw
public void sort(int[] data); SvR? nN|
} 4`+hX'
Oy/+uw^
public static void swap(int[] data, int i, int j) { HQl_/:Wx
int temp = data; #s'
data = data[j]; ,l_n:H+"F
data[j] = temp; y*Wl(w3
} v J.sa&\H
} Skd,=r