[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; }+QhW]nO{F
} OXa5Jg}=
int i1=l; 5 O{Ip-
int i2=mid+1; _7t|0aNo\
for(int cur=l;cur<=r;cur++){ [TpA26#TTO
if(i1==mid+1) ` maN5)
data[cur]=temp[i2++]; |zRoXO`]-*
else if(i2>r) -E,{r[Sp
data[cur]=temp[i1++]; g9grfN
else if(temp[i1] data[cur]=temp[i1++]; &)fhlp5
else `gBXeG2fn
data[cur]=temp[i2++]; y5Z<uwXc
} 3=G5(0
} h!X'SGK
inq4CGY
} |P[D2R}
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改进后的归并排序: 0qotC6l~_w
b'Piymx
package org.rut.util.algorithm.support; D KMbs
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import org.rut.util.algorithm.SortUtil; qQ?,|4)y
T[8"u<O96
/** -h^} jP8
* @author treeroot EFT02#F_f
* @since 2006-2-2 D,m&^P=%e
* @version 1.0 hBYh90]
*/ zei9,^ C
public class ImprovedMergeSort implements SortUtil.Sort { nw]e_sm
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private static final int THRESHOLD = 10; Pvb+
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/* eiNk]KXAYX
* (non-Javadoc) ;?Y`e
* (<:rKp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qkR,<"C|`
*/ ck4T#g;=
public void sort(int[] data) { D/%b@Ls2ze
int[] temp=new int[data.length]; uq#h\p|
mergeSort(data,temp,0,data.length-1); _UVX
} *t]&b ;=gE
vSHIl"h
private void mergeSort(int[] data, int[] temp, int l, int r) { Nf?, _Rl
int i, j, k; \Kzt*C-ZH
int mid = (l + r) / 2; cO"Xg<#y
if (l == r) g`f6gxc
return; `QyALcO
if ((mid - l) >= THRESHOLD) X0r#,u
mergeSort(data, temp, l, mid); +h\W~muR
else GXvo't@N
insertSort(data, l, mid - l + 1); /{#_Um0.
if ((r - mid) > THRESHOLD) #I{Yf(2Z
mergeSort(data, temp, mid + 1, r); ]mLTF',5
else eABdye
insertSort(data, mid + 1, r - mid); %imBGh
;?L[]Ezzt
for (i = l; i <= mid; i++) { =~2 Uv>YG
temp = data; 1wNY}3
} A1s=;qr
for (j = 1; j <= r - mid; j++) { gm%bxr@X~
temp[r - j + 1] = data[j + mid]; />j+7ts
} k;Ny%%5
int a = temp[l]; 3M:B?2
int b = temp[r]; tEs[zo+DR-
for (i = l, j = r, k = l; k <= r; k++) { R.WsC bU
if (a < b) { 0tm "kzy
data[k] = temp[i++]; a^)4q\E
a = temp; *U^\Mwp
} else { kjKpzdbD
data[k] = temp[j--]; {p_vR/yN
b = temp[j]; OB I8~k
} QIz N#;g
} V;+$/>J`vB
} `F`'b)
Hn'2'Vu
/** Rb>RjHo S
* @param data ^1& LHrT
* @param l UFY~D"%/
* @param i Appz1q
*/ {*r$m>HpM
private void insertSort(int[] data, int start, int len) { $6x:aG*F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {3p7`h~
} D"XQ!1B%
} */dsMa
} iI Nu`>I
} NCpn^m)Q}
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堆排序： R{y{
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package org.rut.util.algorithm.support; 3 BhA.o
E#F9<=mA)
import org.rut.util.algorithm.SortUtil; o0+BQ&A)s*
r^tXr[}
/** U:p"IY#%
* @author treeroot ]?^xc[
* @since 2006-2-2 NF.6(PG|
* @version 1.0 6rCP]YnF
*/ {-]HYk
public class HeapSort implements SortUtil.Sort{ ?g#t3j>zoF
~5dq5_
/* (non-Javadoc) NHVx!Kc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kvVz-PJy
*/ `}Zbfe~
public void sort(int[] data) { p:>?
MaxHeap h=new MaxHeap(); bRe*(
h.init(data); @X><lz
for(int i=0;i h.remove(); v2=!*
System.arraycopy(h.queue,1,data,0,data.length); |}y}o:(
} Z/UVKJm>:
b2kbuk]
private static class MaxHeap{ ^* v{t?u
P\0%nyOG(%
void init(int[] data){ i1\ /\^
this.queue=new int[data.length+1]; KK3xz*W0
for(int i=0;i queue[++size]=data; w*kFtNBfU
fixUp(size); V~"d`j
} &UH z
} { RX|
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private int size=0; e>9{36~jh
.wn_e=lT
private int[] queue; {h+E&u[zL
0$Db@
public int get() { k3h53QTmC
return queue[1]; !fjU?_[S
} BjJ gQ`X
[ +@<T)
public void remove() { _rh.z_a7w
SortUtil.swap(queue,1,size--); 5kZ yiC*
fixDown(1); t|"d#5'
} 6]49kHgMhe
file://fixdown =C2C~Xd
private void fixDown(int k) { r>@/XYK&\
int j; ;//qjo
while ((j = k << 1) <= size) { 8=AKOOU7>
if (j < size %26amp;%26amp; queue[j] j++; Z"KuS
if (queue[k]>queue[j]) file://不用交换 5F?g6?j{
break; &b8D'XQu
SortUtil.swap(queue,j,k); )F2tV ]k\
k = j; =+\oL!^
} m;1exa
} )%c)-c
private void fixUp(int k) { y9 '3vZ
while (k > 1) { Z6ex<[`I
int j = k >> 1; ")buDU6_
if (queue[j]>queue[k]) v@SrEmg
break; jM<Ihmh|
SortUtil.swap(queue,j,k); Vs(Zs[
k = j; 1k({(\>qq
} aJ@qB9(ZBe
} 0t0:soZx
}=4".V`-o
} +zPg`/
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} $^ 3 f}IzA
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SortUtil： @C)h;TR
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package org.rut.util.algorithm; kS9
bcs(#
import org.rut.util.algorithm.support.BubbleSort; 0P >dXd)T
import org.rut.util.algorithm.support.HeapSort; I2Rp=L:z5
import org.rut.util.algorithm.support.ImprovedMergeSort; |{"7/~*[
import org.rut.util.algorithm.support.ImprovedQuickSort; _/\H3
import org.rut.util.algorithm.support.InsertSort; Ww4G
import org.rut.util.algorithm.support.MergeSort; 4(ZV\}j1
import org.rut.util.algorithm.support.QuickSort; 4w[ta?&6B
import org.rut.util.algorithm.support.SelectionSort; ir?9{t/()
import org.rut.util.algorithm.support.ShellSort; *r3vTgo$
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/** 'm:B(N@+
* @author treeroot 7NEn+OI4
* @since 2006-2-2 UGgi)
* @version 1.0 gC 4#!P
*/ ajr8tp'
public class SortUtil { /HD2F_XA
public final static int INSERT = 1; PS1~6f"D
public final static int BUBBLE = 2; N`MQHQ1
public final static int SELECTION = 3; 8A_(]Q
public final static int SHELL = 4; |XZf:}q5:
public final static int QUICK = 5; ;hDr+&J|
public final static int IMPROVED_QUICK = 6; WRM}gWv*
public final static int MERGE = 7; {}e IpK,+
public final static int IMPROVED_MERGE = 8; #1k,t
public final static int HEAP = 9; cxdM!L; `
SO"P3X
public static void sort(int[] data) { u>#'Y+7
sort(data, IMPROVED_QUICK); gV BV@v!W
} +(0eOO'\M
private static String[] name={ B\yid@e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (H^o8J
}; "Xc=<rX
`SrVMb(
private static Sort[] impl=new Sort[]{ +=4b5*+qG
new InsertSort(), SF7 Scd
new BubbleSort(), }X-ggO,
new SelectionSort(), `Fr$q1qae{
new ShellSort(), $_kU)<e3
new QuickSort(), ]ghPbS@
new ImprovedQuickSort(), X.qKG0i
new MergeSort(), i9tM]/SP
new ImprovedMergeSort(), dZZ/(oE>
new HeapSort() *1Q?~
}; V-0Y~T
u)-l+U.
public static String toString(int algorithm){ =j-{Mxb3
return name[algorithm-1]; Ns(F%zkm
} uWE@7e4'I
;p8xL)mUP
public static void sort(int[] data, int algorithm) { T8LwDqio
impl[algorithm-1].sort(data); k$c!J'qL&
} 7 pV3#fQ
,@xZuq+K<
public static interface Sort { *d 4D9(
public void sort(int[] data); AsOI`@FV
} 4<|]k?@
Y!zlte|P
public static void swap(int[] data, int i, int j) { X +R_TC
int temp = data; vr$[
data = data[j]; gO%3~f!vY#
data[j] = temp; e6Y0G,K
} sKtH4d5)
} J5wq}<8