[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; G%iTL"6
} )Fon;/p
int i1=l; ,4:=n$e 0
int i2=mid+1; ' Dp;fEU$
for(int cur=l;cur<=r;cur++){ o=J-Ju
if(i1==mid+1) z36wWdRa6
data[cur]=temp[i2++]; J?{@pA
else if(i2>r) _NefzZWUJ
data[cur]=temp[i1++]; ~-R%m
else if(temp[i1] data[cur]=temp[i1++]; mC2K &'[
else G?kK:eV
data[cur]=temp[i2++]; =' uePM")
} P q0%oz
} )Zf1%h~0r
0vX4v)-^u
} 7UIf
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改进后的归并排序: 0FSNIPx
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package org.rut.util.algorithm.support; % IHIXncv[
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import org.rut.util.algorithm.SortUtil; Lq|>n[KY
J3`0i@
/** ijsoY\V50
* @author treeroot IjGPiC
* @since 2006-2-2 pHT]2e#
* @version 1.0 sYjhQN=Y*
*/ 3xT9/8*
public class ImprovedMergeSort implements SortUtil.Sort { .G.WPVE
m g,1*B'
private static final int THRESHOLD = 10; ^/_Yk.w
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/* 4-~Z{#-
* (non-Javadoc) o]EL=j
* vJLGy]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KL3Z(
*/ > vdmN]
public void sort(int[] data) { >H^#!eaqw
int[] temp=new int[data.length]; gk6UV2nE?
mergeSort(data,temp,0,data.length-1); v3#,Z!
} {j=`
fuzB;Ea
private void mergeSort(int[] data, int[] temp, int l, int r) { q`,%L1c4
int i, j, k; [Ur\^wS
int mid = (l + r) / 2; Y{D%v
if (l == r) x-"8V(
return; Z:dp/M}
if ((mid - l) >= THRESHOLD) f(Y_<%
mergeSort(data, temp, l, mid); /a'1W/^2
else N0H=;CIQ
insertSort(data, l, mid - l + 1); V"m S$MN
if ((r - mid) > THRESHOLD) l|=4FIMD
mergeSort(data, temp, mid + 1, r); U@M3.[jw
else Hs*["zFc
insertSort(data, mid + 1, r - mid); T]\c2U
TP"cEfs x
for (i = l; i <= mid; i++) { 3w</B-|nQ
temp = data; d{"-iw)t
} ]I[~0PCSX
for (j = 1; j <= r - mid; j++) { @(Y!$><Is
temp[r - j + 1] = data[j + mid]; 6$6QAW0+f
} ;eN ^'/4A
int a = temp[l]; &W,jR|B
int b = temp[r]; yEq7ueJ'
for (i = l, j = r, k = l; k <= r; k++) { TG%B:^Yz!
if (a < b) { ;%9]G|*{
data[k] = temp[i++]; T1]?E]m{
a = temp; 7Ml4u%?
} else { h:nybLw?
data[k] = temp[j--]; fC[za,PXaE
b = temp[j]; EHk\Q\
} HR}O:2'
} DsejZ&
} lj (y
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/** HwFX,?
* @param data cg.{oMwa
* @param l ` y\)X C7
* @param i N% 4"9K
*/ GC{M"q|_
private void insertSort(int[] data, int start, int len) { V5w1ET
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Nob(D'vSr
} {drc}BL_
} 5~|{:29X
} Snx!^4+MF
} aYWWln
$VuXr=f}
堆排序： ){*+s RBW
c2y,zq|H
package org.rut.util.algorithm.support; 2yZr!Rb~*
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import org.rut.util.algorithm.SortUtil; "2l`XH
$KK~KEZ2
/** )S caT1I
* @author treeroot p+;& Gg54
* @since 2006-2-2 %{@Q7
* @version 1.0 98>GHl'lM
*/ T$I_nxh[)L
public class HeapSort implements SortUtil.Sort{ V)j[`,M:
-L1785pB85
/* (non-Javadoc) T3X'73M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +(W1x C0
*/ FJ:^pROpm
public void sort(int[] data) { w&q[%(G_
MaxHeap h=new MaxHeap(); !sb r!Qt
h.init(data); UFG_ZoD+
for(int i=0;i h.remove(); }yz>(Pq
System.arraycopy(h.queue,1,data,0,data.length); V ~C$|+>e
} ffZ~r%25{
5E&#Kh(I
private static class MaxHeap{ Z0F~?
,#K/+T
void init(int[] data){ n0xGIq
this.queue=new int[data.length+1]; Oynb"T&8
for(int i=0;i queue[++size]=data; `*C=R _
fixUp(size); +$h
} [_,as
} ~HZdIPcC
aD^$v
private int size=0; nHseA
i[v4[C=WB!
private int[] queue; hF%M!otcJ-
qt@L&v}~j
public int get() { JvpGxj
return queue[1]; ]~({;;3o-
} m`/Nl<
`(e:H
public void remove() { /yOx=V
SortUtil.swap(queue,1,size--); /wV|;D^ )
fixDown(1); 3Q=^&o0fl
} Gv:~P_vBH[
file://fixdown t|aV:x
private void fixDown(int k) { lQn" 6o1
int j; b 7UJ
while ((j = k << 1) <= size) { RkF#NCnL;
if (j < size %26amp;%26amp; queue[j] j++; >STtX6h
if (queue[k]>queue[j]) file://不用交换 jD: N)((
break; %;PpwI
SortUtil.swap(queue,j,k); rE3dHJN;
k = j; {& o^p!
} UUah5$Iy
} i0vm00oT
private void fixUp(int k) { D(!^$9e9b
while (k > 1) { p4`1^}f&Ie
int j = k >> 1; o NtFYY
if (queue[j]>queue[k]) : T*Q2
break; BOs/:ZbK0W
SortUtil.swap(queue,j,k); Shm> r@C?
k = j; /^.|m3
} KZm&sk=QM-
} _yg_?GH
2u"lc'9v
} 1F@k9[d~
=BJe)!b
} <W4F`6`x
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SortUtil： )t6]F6!_
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package org.rut.util.algorithm; w5@5"M
YH&=cI@
import org.rut.util.algorithm.support.BubbleSort; z/@_?01T=
import org.rut.util.algorithm.support.HeapSort; }A#IBqf5
import org.rut.util.algorithm.support.ImprovedMergeSort; g@.$P>Bh
import org.rut.util.algorithm.support.ImprovedQuickSort; y.rN(
import org.rut.util.algorithm.support.InsertSort; K7 e~%mY
import org.rut.util.algorithm.support.MergeSort; [a=exK
import org.rut.util.algorithm.support.QuickSort; iI3:<j l
import org.rut.util.algorithm.support.SelectionSort; J2UQq7-y
import org.rut.util.algorithm.support.ShellSort; xoaO=7\io
+$2{u_m,
/** S;|:ci<[=
* @author treeroot /jbAf]"F;
* @since 2006-2-2 ?t#wK}d.
* @version 1.0 Ey6R/M)?:y
*/ !l:GrT8J
public class SortUtil { ;nY#/%f
public final static int INSERT = 1; =2Y;)wrF
public final static int BUBBLE = 2; ,_[x|8m
public final static int SELECTION = 3; ><V*`{bD9)
public final static int SHELL = 4; m,l/=M
public final static int QUICK = 5; O%bbyR2
public final static int IMPROVED_QUICK = 6; ajYe?z
public final static int MERGE = 7; gQ1obT"|
public final static int IMPROVED_MERGE = 8; SN{z)q
public final static int HEAP = 9; Cux(v8=n
H;H=8'
public static void sort(int[] data) { 7T~M`$h
sort(data, IMPROVED_QUICK); [$N_YcN?
} |3H+b,M5
private static String[] name={ I>c,Bo7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k+<945kC
}; N8<J'7%
)^2eC<t
private static Sort[] impl=new Sort[]{ qd`e:s*%
new InsertSort(), >ohH4:
new BubbleSort(), &w@]\7L,:
new SelectionSort(), DaQ"Df_X
new ShellSort(), UKS5{"=T[
new QuickSort(), #c"eff
new ImprovedQuickSort(), lCi{v.
new MergeSort(), mU'<:gL+
new ImprovedMergeSort(), .~z'm$s1o
new HeapSort() 96=<phcwN[
}; gI+8J.AG=
Z\&f"z?L
public static String toString(int algorithm){ G\.~/<Mg+
return name[algorithm-1]; ]9@:7d6
} Xn7G2Yp
C2 N+X(
public static void sort(int[] data, int algorithm) { q z)2a2C
impl[algorithm-1].sort(data); a#oROb-*~
} Fr%#
! 'zd(kv<
public static interface Sort { T$Z9F^w
public void sort(int[] data); [ks_wvY:'
} y^.66BH
d} >Po%r:
public static void swap(int[] data, int i, int j) { RLF&-[mr3
int temp = data; f/Gx}x=
data = data[j]; eUPa5{P
data[j] = temp; o%d TcoCN
} @s5=6z]=H
} 1? >P3C