[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; ^?5[M^
} u{-J?t&`
int i1=l; YlY3C
int i2=mid+1; kh'R/Dt
for(int cur=l;cur<=r;cur++){ ua^gG3n0
if(i1==mid+1) .>{.!a
data[cur]=temp[i2++]; #z*-
else if(i2>r) Z\`i~
data[cur]=temp[i1++]; ;U^7]JO;
else if(temp[i1] data[cur]=temp[i1++]; abVz/R/o
else Y`x54_32
data[cur]=temp[i2++]; f[bx|6
} j/FFxlFNL
} cS'|c06
Yzr|Z7rq}
} KH<f=?b
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改进后的归并排序: >c~Fgs
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package org.rut.util.algorithm.support; YMSA[hm
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import org.rut.util.algorithm.SortUtil; U#jbii6e
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/** 42Gv]X
* @author treeroot "t{|e6
* @since 2006-2-2 fgg;WXcT ~
* @version 1.0 /puM3ZN
*/ lP!`lhc-^
public class ImprovedMergeSort implements SortUtil.Sort { /kAu&}
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private static final int THRESHOLD = 10; pV3o\bk!
V ?10O
/* jM E==)Y
* (non-Javadoc) 1i.t^PY
* <R6$ kom`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Rw54`_kFEB
*/ <oE(I)r4,
public void sort(int[] data) { UY_'F5X
int[] temp=new int[data.length]; 4;*o}E
mergeSort(data,temp,0,data.length-1); {hr+ENgV
} Wa8?o~0"L
`xO9xo#
private void mergeSort(int[] data, int[] temp, int l, int r) { ?W%9H\;
int i, j, k; %U.aRSf/
int mid = (l + r) / 2; {ws:g![
if (l == r) "v"w ER?
return; -L&FguoVB
if ((mid - l) >= THRESHOLD) U-P\F-
mergeSort(data, temp, l, mid); P(1bd"Q
else pMB~Lt9
insertSort(data, l, mid - l + 1); 5df~] -=0Y
if ((r - mid) > THRESHOLD) llf|d'5Nl
mergeSort(data, temp, mid + 1, r); w2!5Cb2
else 03iD(,@
insertSort(data, mid + 1, r - mid); .{-&3++WZ
p~T)Af<(
for (i = l; i <= mid; i++) { ;OlC^\e
temp = data; kp~@Ub @O3
} 5z8!Nmb/
for (j = 1; j <= r - mid; j++) { BPoY32d"_
temp[r - j + 1] = data[j + mid]; m)A~1+M$)L
} s uT#k3
int a = temp[l]; ?#8s=t
int b = temp[r]; (f^K\7HM
for (i = l, j = r, k = l; k <= r; k++) { n$*'J9W~
if (a < b) { VQr)VU=jb
data[k] = temp[i++]; M>CW(X
a = temp; ddDl~&}o
} else { S$!)Uc\)A
data[k] = temp[j--]; ;NrN#<j(!
b = temp[j]; 8+Y+\XZG
} .[v4'ww^
} ,8KD-"l^g
} 0L "+,
tN'-4<+
/** p/|":(U
* @param data Z|YiYQl[)
* @param l A9_)}
* @param i 3Z*'
*/ NR8YVO)5$
private void insertSort(int[] data, int start, int len) { TSQ/{=r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `TM[7'
} :nuMakZZ
} Yg5m=Lis
} wG1A]OJl1
} kI>Iq Q-h
Fd:A^]
堆排序： -saisH6
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package org.rut.util.algorithm.support; yq{k:)
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import org.rut.util.algorithm.SortUtil; w l.#{@J]<
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/** (fc /"B-
* @author treeroot r-#23iT.~
* @since 2006-2-2 f)xHSF"
* @version 1.0 gDP\u<2!
*/ <$WRc\}&g
public class HeapSort implements SortUtil.Sort{ TI{W(2O*
FFH9$>A
/* (non-Javadoc) 2k,!P6fgl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mf0XQ3n`H
*/ y{~l&zrl
public void sort(int[] data) { ~/hyf]*j
MaxHeap h=new MaxHeap(); M@e&uz!Rx
h.init(data); LQ5WS
for(int i=0;i h.remove(); "(uEcS2<
System.arraycopy(h.queue,1,data,0,data.length); hjB G`S#
} 4}:a"1P"
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private static class MaxHeap{ 'H0b1t1S%
o(iN}.c
void init(int[] data){ XG fLi
this.queue=new int[data.length+1]; nwlo,[
for(int i=0;i queue[++size]=data; Y[=Gv6Fr
fixUp(size); S/j~1q_|G
} 8U8l 5r
} |];s[^$#
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private int size=0; a}3sG_(Y
-ec~~95
private int[] queue; bP%0T++vo
Hcw@24ic
public int get() { |A_yr/f
return queue[1]; OO.. Y
} "^j& ^sA+
eWvL(2`Tx
public void remove() { bXoj/zek
SortUtil.swap(queue,1,size--); !br0s(|
fixDown(1); ?MevPy`H
} &DdFK.lt
file://fixdown |I7-7d-;/
private void fixDown(int k) { :]%z8,6k
int j; .YquOCc(
while ((j = k << 1) <= size) { (`}O!;/E}
if (j < size %26amp;%26amp; queue[j] j++; " &B/v"nj
if (queue[k]>queue[j]) file://不用交换 eR.ucTji
break; Zfyr&]"
SortUtil.swap(queue,j,k); {s}@$rW
k = j; wy5vn?T@
} t.m65
} hETTD%
private void fixUp(int k) { >&h#t7<
while (k > 1) { K29]B~0%E
int j = k >> 1; BJDe1W3;'
if (queue[j]>queue[k]) 9.R)iA
break; @; ayl
SortUtil.swap(queue,j,k); V.PbAN
k = j; ?C
} Pb$ep|`u
} 0R~{|RHM
#z{9:o7[-
} {.tUn`j6V
YC\~PVG
} X$w ,zb\
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SortUtil： PdG:aGQ>
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package org.rut.util.algorithm; |V{'W-` |[
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import org.rut.util.algorithm.support.BubbleSort; b'`8$;MII
import org.rut.util.algorithm.support.HeapSort; V2kNJwwk
import org.rut.util.algorithm.support.ImprovedMergeSort; E<;C@B
import org.rut.util.algorithm.support.ImprovedQuickSort; %RgCU$s[>
import org.rut.util.algorithm.support.InsertSort; c;l d
import org.rut.util.algorithm.support.MergeSort; ?#^(QR|/
import org.rut.util.algorithm.support.QuickSort; :`6E{yfM
import org.rut.util.algorithm.support.SelectionSort; HXF5fs
import org.rut.util.algorithm.support.ShellSort; "FI]l<G&
GkjTE2I3
/** -p =b5L
* @author treeroot UahFs
* @since 2006-2-2 4-efnB
* @version 1.0 NZ`W`#{
*/ Z++JmD1J
public class SortUtil { /)?]vKMiI
public final static int INSERT = 1; |S#)[83*3
public final static int BUBBLE = 2; O G#By6O
public final static int SELECTION = 3; DzX5_ kA
public final static int SHELL = 4; GbG!vo
public final static int QUICK = 5; S5]rIcM
public final static int IMPROVED_QUICK = 6; 5%C-eB
public final static int MERGE = 7; >(EMZ5
public final static int IMPROVED_MERGE = 8; :M(%sv</
public final static int HEAP = 9; w~sr2;rp<
PNgj 8J4
public static void sort(int[] data) { ZiodJ"r
sort(data, IMPROVED_QUICK); X<J NwjM%
} FQSepUl
private static String[] name={ )y-y-B=+T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v0`E lkaN
}; bJ~]nj 3
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private static Sort[] impl=new Sort[]{ D 4^2F(YRX
new InsertSort(), hh`7b,+ 4
new BubbleSort(), ?fcQd6-}
new SelectionSort(), 5'gV_U
new ShellSort(), <T JUKznO
new QuickSort(), \M1-
new ImprovedQuickSort(), 0}jB/Z_T
new MergeSort(), DWZ!B7Ts
new ImprovedMergeSort(), H `Fe|6I&
new HeapSort() 9r%O
}; Ak[}s|,)
=rcqYPul0
public static String toString(int algorithm){ -sl] funRy
return name[algorithm-1]; 7u-o7#,X2
} !Q=H)\3
# (B <n
public static void sort(int[] data, int algorithm) { GQO}E@W6C
impl[algorithm-1].sort(data); <m"Zk k
} *?%DdVrO@
jI!}}K)d
public static interface Sort { 37Vs9w
public void sort(int[] data); `~QS3zq
} GGsDR%U
ZFh2v]|!
public static void swap(int[] data, int i, int j) { WPiQ+(pt
int temp = data; dX-Xzg
data = data[j]; 82Dw,Cn
data[j] = temp; %JmSCjt`G
} z/aZD\[_
} PX}YDC zP$