[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; ]~S+nlyd<
} tlLn
int i1=l; )z235}P
int i2=mid+1; *3`oU\r
for(int cur=l;cur<=r;cur++){ DE\bYxJ
if(i1==mid+1) uE#,c\[8
data[cur]=temp[i2++]; g+ 1=5g
else if(i2>r) /:{_|P\
data[cur]=temp[i1++]; ~uR6z//%
else if(temp[i1] data[cur]=temp[i1++]; <-B"|u
else ]Bd3d%
data[cur]=temp[i2++]; |EV\a[
} !FO^:V<|5
} s~X*U&}5
O& %"F8B
} pNE\@U|4E
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改进后的归并排序: "E)++\JL
AYA&&b
package org.rut.util.algorithm.support; (S)E|;f%C
A:bPIXb
import org.rut.util.algorithm.SortUtil; EH*ym#Y
zB6u-4^wT
/** ~/jxB)t
* @author treeroot \y H3Y
* @since 2006-2-2 /E{dM2
* @version 1.0 -N7L#a
*/ 3R%UPT0>
public class ImprovedMergeSort implements SortUtil.Sort { #>m, Cm
;[KriW
private static final int THRESHOLD = 10; Jhsv2,8 {
q X%vRf0
/* yaRcBT?
* (non-Javadoc) !\#Wk0Ku
* b?]ly(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yvooM'R
*/ ezr\T
public void sort(int[] data) { 5u|=;Hz*)
int[] temp=new int[data.length]; 8\)U|/A7
mergeSort(data,temp,0,data.length-1); 7XVzd]jH
} ocl47)
v=*Bb3dt
private void mergeSort(int[] data, int[] temp, int l, int r) { ?VZ11?u
int i, j, k; @UpC{M--Wr
int mid = (l + r) / 2; H\=LE
if (l == r) ^s2m\Q(
return; k~1j/VHv
if ((mid - l) >= THRESHOLD) oT|P1t.
mergeSort(data, temp, l, mid); p`ADro*
else 'z-;*!A}j
insertSort(data, l, mid - l + 1); L`jB)wF/J
if ((r - mid) > THRESHOLD) (~ ]g,*+
mergeSort(data, temp, mid + 1, r); $K?T=a;z
else )pjjW"C+
insertSort(data, mid + 1, r - mid); lHcZi
WXLe,7y
for (i = l; i <= mid; i++) { {}g %"mi#
temp = data; Z(Eke
} \7,MZt
for (j = 1; j <= r - mid; j++) { A-a17}fta
temp[r - j + 1] = data[j + mid]; my\o P(e\
} :T7?
int a = temp[l]; H~[LJ5x
int b = temp[r]; `!nJS|
for (i = l, j = r, k = l; k <= r; k++) { ,G[r+4|h
if (a < b) { }{&ln
data[k] = temp[i++]; Bn~\HW\Lh
a = temp; 's>#8;X
} else { DHm[8 Qp
data[k] = temp[j--]; ~JwpNJs
b = temp[j]; ShWHHU(QQ
} Jt2,LL:G
} /lLov.
} Vl{~@G,@
t{R5 EU
/** c$Xe.:QY
* @param data "[jhaUAK
* @param l Qj 6gg
* @param i cc|CC Zl
*/ *.m{jgi1X
private void insertSort(int[] data, int start, int len) { ]{IR&{EI-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lx{.H,1~
} ,8c dXt
} =5y`(0 I`U
} B*?ZE4`
} 9W1;Kb|Z<
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堆排序： y$IaXr5L
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package org.rut.util.algorithm.support; L!;^#g
y#S1c)vU
import org.rut.util.algorithm.SortUtil; M!N` Orz
4 ,p#:!
/** eM?rc55|
* @author treeroot L]k*QIn:h
* @since 2006-2-2 N9i}p^F<_
* @version 1.0 5%<TF.;-J
*/ 7$(_j<o`
public class HeapSort implements SortUtil.Sort{ 'FShNY5
t|;%DA)fjw
/* (non-Javadoc) j\2]M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?^LG hdR
*/ YF}9k
public void sort(int[] data) { 8#+`9GI
MaxHeap h=new MaxHeap(); wL'oImE
h.init(data); $brKl8P
for(int i=0;i h.remove(); JAc@S20v\
System.arraycopy(h.queue,1,data,0,data.length); `FUFK/7 w\
} p{NPcT%&
^DBD63N"
private static class MaxHeap{ L~*u4
!xkj30O(G
void init(int[] data){ EVR! @6@
this.queue=new int[data.length+1]; r2RBrZ@1
for(int i=0;i queue[++size]=data; n}19?K]g
fixUp(size); I+0c8T(:
} 3PfiQ|/b
} eh$G.-2N
XjX 2[*l
private int size=0; +.w[6
@. "q
private int[] queue; gf+o1\5t@
F?7u~b|@{
public int get() { xb%/sz(4
return queue[1]; Ay2b,q
} +Dv7:x7
!0`lu_ZN
public void remove() { vx'l>@]k
SortUtil.swap(queue,1,size--); {3_Gjb5\\4
fixDown(1); }A-{6Qe
} f[x~)=
file://fixdown M9gOoYf,~
private void fixDown(int k) { <BSSa`N`
int j; FIH@2zA
while ((j = k << 1) <= size) { $nj\\,(g
if (j < size %26amp;%26amp; queue[j] j++; 9+}cE**=d
if (queue[k]>queue[j]) file://不用交换 ri:,q/-
break; '}_=kp'X
SortUtil.swap(queue,j,k); _0K.Fk*(!
k = j; f6Ml[!aU
} =tq1ogE
} 6VC-KY
private void fixUp(int k) { 6_WmCtvF
while (k > 1) { Z%#^xCz;w>
int j = k >> 1; |7y6 pz
if (queue[j]>queue[k]) [~COYjp
break; +@e }mL\8
SortUtil.swap(queue,j,k); 012Lwd
k = j; :i.t)ES
} m;c3Z-
} 6Z Xu,ks}
x.ba|:5
} hqL+_|DW
z?)He)d
} /N>} 4Ay
)#a7'Ba
SortUtil： }B`Ku5 M
*,17x`1e
package org.rut.util.algorithm; P7Xg{L&@.
"v5ElYG
import org.rut.util.algorithm.support.BubbleSort; e^zHw^js
import org.rut.util.algorithm.support.HeapSort; opXDm\
import org.rut.util.algorithm.support.ImprovedMergeSort; "mR*7o$|
import org.rut.util.algorithm.support.ImprovedQuickSort; +>!V]S
import org.rut.util.algorithm.support.InsertSort; SnW7x
import org.rut.util.algorithm.support.MergeSort; J smB^
import org.rut.util.algorithm.support.QuickSort; ;`+`#h3-V
import org.rut.util.algorithm.support.SelectionSort; m^Glc?g<
import org.rut.util.algorithm.support.ShellSort; Ls1B\Aw_
_B3zRO
/** j1A|D
* @author treeroot !.*iw k`
* @since 2006-2-2 L!,d"wuD
* @version 1.0 2L:$aZ
*/ NEw$q4
public class SortUtil { ~cIl$b
public final static int INSERT = 1; "kU]
public final static int BUBBLE = 2; afx'
public final static int SELECTION = 3; `]jqQr97
public final static int SHELL = 4; o5SQ1;`
public final static int QUICK = 5; J1X~vQAe
public final static int IMPROVED_QUICK = 6; OM)3Y6rK
public final static int MERGE = 7; P_&p=${
public final static int IMPROVED_MERGE = 8; nM8[
public final static int HEAP = 9; *GJ:+U&m[
f0DK>L
public static void sort(int[] data) { >g]ON9CGH
sort(data, IMPROVED_QUICK); <UT>PCNG
} N'QqJe7Z
private static String[] name={ 9,scH65x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _w>uI57U
}; V&%C\ns4
a.q;_5\5`
private static Sort[] impl=new Sort[]{ +Ofa#^5);K
new InsertSort(), <bP#H
new BubbleSort(), cI:-Z{M7z
new SelectionSort(), m*dNrG
new ShellSort(), H:Y&OZ
new QuickSort(), [1SMg$@<
new ImprovedQuickSort(), |cgui
new MergeSort(), cS(;Qs]Q
new ImprovedMergeSort(), k"0;D-lTZ>
new HeapSort() A?A9`w
}; 8vSIf+
hF>u)%J/S
public static String toString(int algorithm){ Juu+vMn1
return name[algorithm-1]; R%"K
} id?E)Jy
OhFW*v
public static void sort(int[] data, int algorithm) { "(f`U.
impl[algorithm-1].sort(data); oL-2qtv
} psUE!~9,
nZ E)_
public static interface Sort { +D`*\d1
public void sort(int[] data); MA* :<l
} -ihiG_f
.T8K-<R
public static void swap(int[] data, int i, int j) { 2+Yb 7 uI,
int temp = data; e<"/'Ql!k
data = data[j]; Z9[+'ZWt
data[j] = temp; ?aWx(dVQ
} :o8MUXH$
} '!Wvqs