[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; "LaNXZ9
} P6i4Dr
int i1=l; wCMsaW
int i2=mid+1; z+PSx'#}
for(int cur=l;cur<=r;cur++){ [53@'@26
if(i1==mid+1) xb8fV*RO8A
data[cur]=temp[i2++]; q,aWF5m@
else if(i2>r) w][ ;
data[cur]=temp[i1++]; L@CN0ezQs
else if(temp[i1] data[cur]=temp[i1++]; lH:TE=|4
else o$d; Y2K
data[cur]=temp[i2++]; *S~. KW[
} B(Y{
} Mr2dhSQ!
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} Z>o;Yf[
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改进后的归并排序: Y8m|f
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package org.rut.util.algorithm.support; 7<IrN\@U
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import org.rut.util.algorithm.SortUtil; T6OIb
hAG++<H{
/** 0u'2f`p*
* @author treeroot {* >$aI
* @since 2006-2-2 (mt,:hX
* @version 1.0 q$:T<mFK$
*/ Xa[gDdbL
public class ImprovedMergeSort implements SortUtil.Sort { 5SR29Z[
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private static final int THRESHOLD = 10; uPRusG4!R
MCL?J,1?r
/* KSh<_`j
* (non-Javadoc) kn+`2-0
* 5y}}?6n+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OPwp(b
*/ HxU.kcf
public void sort(int[] data) { ?Q9/C|
int[] temp=new int[data.length]; /LuwPM
mergeSort(data,temp,0,data.length-1); (cNT ud$
} `o/tpuI
p8Lb*7W
private void mergeSort(int[] data, int[] temp, int l, int r) { JY9Hqf
int i, j, k; z)43+8;
int mid = (l + r) / 2; 7" Dw4}T
if (l == r) 2NIK0%6
return; <X|"5/h
if ((mid - l) >= THRESHOLD) r'{pTgm#
mergeSort(data, temp, l, mid); fJc,KZy
else e)!X9><J
insertSort(data, l, mid - l + 1); p7zHP
if ((r - mid) > THRESHOLD) 6M+~{9(S
mergeSort(data, temp, mid + 1, r); Z0b1E
else \Qu~iB(Y
insertSort(data, mid + 1, r - mid); ,o*b-Cv/
(;~[}"
for (i = l; i <= mid; i++) { sl |S9Ix
temp = data; ;X|;/@@
} !G`w@E9M)
for (j = 1; j <= r - mid; j++) { "Q2[A]4E
temp[r - j + 1] = data[j + mid]; 6NJ La|&n
} o=;.RYi
int a = temp[l]; 99:`58G
int b = temp[r]; 4\Y=*X
for (i = l, j = r, k = l; k <= r; k++) { YA{Kgc^
if (a < b) { }! zjj\g^
data[k] = temp[i++]; tQo"$ JN}
a = temp; GlQ=M)E
} else { ;bP7|
data[k] = temp[j--]; Lm,io\z
b = temp[j]; 4sNM#]%|
} jDH)S{k
} P,I3E?! j
} P4R.~J ;8
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/** YJrK oK}
* @param data h>bmHQ
* @param l ,A[HYc|uy
* @param i ' nf"u
*/ i,;Q
private void insertSort(int[] data, int start, int len) { ~;bwfp_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q.Z0Q
} (z^2LaM `8
} ;h/Y9uYn
} 1REq.%/=
} Pvbw>k;
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堆排序： `z+:Z>>
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package org.rut.util.algorithm.support; nqiy)ZN#R
6JK;]Ah
import org.rut.util.algorithm.SortUtil; MKoN^(7
Z(xn-
/** e5veq!*C?
* @author treeroot `DWzp5Ax
* @since 2006-2-2 Y`lC4*g
* @version 1.0 }c&Zv#iO6
*/ ^+,mxV'8!
public class HeapSort implements SortUtil.Sort{ N_/&xHw
Eq'{uV:
/* (non-Javadoc) VMen:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M}38uxP
*/ EWH'x$z_q
public void sort(int[] data) { ] +Gi~
MaxHeap h=new MaxHeap(); _|*3uGo:
h.init(data); OP:;?Fs9`
for(int i=0;i h.remove(); ]!0*k#i_.
System.arraycopy(h.queue,1,data,0,data.length); u7a4taM$d
} nwO;>Qr
zZ;tSKL
private static class MaxHeap{ .lTGFeJqZ4
{yspNyOx
void init(int[] data){ OaU$ [Z'8
this.queue=new int[data.length+1]; Y*J`Wf(w
for(int i=0;i queue[++size]=data; yDy3;*lE
fixUp(size); eZP"M6
} kw=+"U
} go{'mX)}u
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private int size=0; B;G|2um:$
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private int[] queue; M%9PVePOe
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public int get() { 2psI\7UjA]
return queue[1]; o @&#*3<_e
} E$8GXo00v
TS=p8@w}
public void remove() { }Qg9l|
SortUtil.swap(queue,1,size--); V=E9*$b]
fixDown(1); ,Sz*]X
} WOgbz&S?J
file://fixdown 'lIT7MK
private void fixDown(int k) { 5F <zW-;
int j; o*r\&!NIw
while ((j = k << 1) <= size) { a*%>H(x
if (j < size %26amp;%26amp; queue[j] j++; D&N5)
if (queue[k]>queue[j]) file://不用交换 Pf@8C{I
break; PlBT H
SortUtil.swap(queue,j,k); \>9%=32u.
k = j; ,|T
} 5QMu=/
} N,Y<mX
private void fixUp(int k) { c9f~^}jNb
while (k > 1) { KY4|C05,
int j = k >> 1; ds7I .Q'
if (queue[j]>queue[k]) M^+~r,D1u
break; Ibpk\a?A{
SortUtil.swap(queue,j,k); GH^i,88
k = j; c%i/ '<Afr
} H={fY:%
} ?c=l"\^x
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} g-')|0py
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} #sNa}292"
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SortUtil： Cw Z{&
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package org.rut.util.algorithm; VbA#D4;
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import org.rut.util.algorithm.support.BubbleSort; S/7D}hJ
import org.rut.util.algorithm.support.HeapSort; 8]2S'mxE
import org.rut.util.algorithm.support.ImprovedMergeSort; mL3'/3-7:V
import org.rut.util.algorithm.support.ImprovedQuickSort; \<;/)!Nmw
import org.rut.util.algorithm.support.InsertSort; G7zfyw}W
import org.rut.util.algorithm.support.MergeSort; p3sz32RX
import org.rut.util.algorithm.support.QuickSort; )`;?%N\
import org.rut.util.algorithm.support.SelectionSort; /mqEc9sq,
import org.rut.util.algorithm.support.ShellSort; ap_(/W
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/** qYbod+UX
* @author treeroot 7xWX:2l*?
* @since 2006-2-2 =\oNu&Q^
* @version 1.0 Xo]FOJ5
*/ a=C?fh
public class SortUtil { S}fIZ1
public final static int INSERT = 1; c3K(mM:
public final static int BUBBLE = 2; @R`OAdy
public final static int SELECTION = 3; U/{cYX
public final static int SHELL = 4; |urohua
public final static int QUICK = 5; *B@<{x r
public final static int IMPROVED_QUICK = 6; F+c*v#T
public final static int MERGE = 7; MIi:\m5
public final static int IMPROVED_MERGE = 8; k('2K2P
public final static int HEAP = 9; eQzSWn[
Pf(z0o&
public static void sort(int[] data) { MF%9
sort(data, IMPROVED_QUICK); .5_w^4`b
} `?`\!uP"
private static String[] name={ Y}e$5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1gCp/m2r7
}; &({X9
mezP"N=L~
private static Sort[] impl=new Sort[]{ `[Z?&'CRQ
new InsertSort(), MPNBA1s
new BubbleSort(), ) ~ C)4
new SelectionSort(), %Z.>)R4
new ShellSort(), u3"F7 lJ
new QuickSort(), RwY) O5
new ImprovedQuickSort(), E~{-RZNK
new MergeSort(), W\FKAvS
new ImprovedMergeSort(), NeeymyW
new HeapSort() l3(k
}; zBqr15
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public static String toString(int algorithm){ wk)gxn1A,
return name[algorithm-1]; ZLo3 0*
} S@Jl_`<
)3z.{.F
public static void sort(int[] data, int algorithm) { [o>/2
impl[algorithm-1].sort(data); Q7`zrCh
} 6n;ewl}
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public static interface Sort { 24|:VxO
public void sort(int[] data); ,]20I _
} lzl4pnj
)e]:T4*vo
public static void swap(int[] data, int i, int j) { qdUlT*fw
int temp = data; @{XN}tWDOp
data = data[j]; .r]n<
data[j] = temp; /`2VJw
} o3}12i S
} ~5]AXi'e~