[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; `+< ^Svou
} Brs6RkRf
int i1=l; q%d'pF
int i2=mid+1; x f{`uHa8
for(int cur=l;cur<=r;cur++){ u `xQC/
if(i1==mid+1) d.w]\
data[cur]=temp[i2++]; Mn&_R{{=
else if(i2>r) !l#aq\:}~e
data[cur]=temp[i1++]; i?pd|J
else if(temp[i1] data[cur]=temp[i1++]; Dom]w.W5
else ,\ 1X\
data[cur]=temp[i2++]; KNN{2thy `
} I$sXbM;z=
} hfIP
}xr0m+/
} V Zbn@1
/"`hz6rIv
改进后的归并排序: mYo~RXKGF
L9e<hRZ$
package org.rut.util.algorithm.support; 3HuocwWbz
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import org.rut.util.algorithm.SortUtil; ^#e|^]] L
$_'<kH-eP
/** nt&% sM-X
* @author treeroot `%Kj+^|DS
* @since 2006-2-2 5G2ueRVb
* @version 1.0 < <0[PJ
*/ >\'}&oi
public class ImprovedMergeSort implements SortUtil.Sort { 5IzCQqOPgX
T,/<'cl"
private static final int THRESHOLD = 10; ;^E\zs
l_04b];
/* 9_svtO]P
* (non-Javadoc) @S~n^v,)
* \cX9!lHl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %sZ3Gpi
*/ 8N j}
public void sort(int[] data) { _(=g[=Mer
int[] temp=new int[data.length]; G]xN#O;
mergeSort(data,temp,0,data.length-1); qD"~5vtLqQ
} )Mflt0fp
&q-P O
private void mergeSort(int[] data, int[] temp, int l, int r) { ,=@WE>ip
int i, j, k; d8 v9[4
int mid = (l + r) / 2; V$$9Rh
if (l == r) 79 _8Oh
return; AYoTCi%7E
if ((mid - l) >= THRESHOLD) "\~>[on
mergeSort(data, temp, l, mid); \zA3H$Df~
else Fm&f
insertSort(data, l, mid - l + 1); &,Rye Q
if ((r - mid) > THRESHOLD) 7?_gm>]a
mergeSort(data, temp, mid + 1, r); k&K'FaM!
else {<Y!'WL{
insertSort(data, mid + 1, r - mid); 1 Cz}|#U
eUu<q/FUMj
for (i = l; i <= mid; i++) { ~(c<M>Q8
temp = data; :SMf (E 5
} J7EWaXGbz
for (j = 1; j <= r - mid; j++) { O]="ggq&
temp[r - j + 1] = data[j + mid]; =NK'xPr
} &jnBDr
int a = temp[l]; P()&?C
int b = temp[r]; rnMi >?
for (i = l, j = r, k = l; k <= r; k++) { n sN n>{
if (a < b) { :zfMRg
data[k] = temp[i++]; RcR-sbR
a = temp; D&N3LH
} else { vgNrHq&2q
data[k] = temp[j--]; h^WMv *2
b = temp[j]; ]w-W
} +-V4:@
} mMu+MXTk<
} )g-0b@z!n
voP#}fD
/** Kp;<z<
* @param data NDe FY
* @param l nhm#_3!6A
* @param i fpzEh}:H\
*/ (YPG4:[
private void insertSort(int[] data, int start, int len) { 4eaH.&&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .",BLuce
} b?M. 0{"H
} D iHj!tZN
} eXLdb-
} xo-}t5w6t
VqOTrB1w/
堆排序： .v=n-k7
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package org.rut.util.algorithm.support; 8_rd1:t5
jW| ,5,43
import org.rut.util.algorithm.SortUtil; ?^8.Sa{
ST0|2)Lh"
/** iP^[xB~v
* @author treeroot %N7G>_+
* @since 2006-2-2 ady SwB
* @version 1.0 &MrG ,/
*/ Z#;\Rb.x7
public class HeapSort implements SortUtil.Sort{ hn&NypI
3Dh{#"88
/* (non-Javadoc) 1iM(13jW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d-8g
*/ $iH
public void sort(int[] data) { 4;IZ}9|G
MaxHeap h=new MaxHeap(); >;xkiO>Y
h.init(data); !0X"^VB
for(int i=0;i h.remove(); K_X(j$2Xc
System.arraycopy(h.queue,1,data,0,data.length); jfa<32`0E
} _Mh..#)`[
`;Fs
private static class MaxHeap{ JJ_KfnH
gp{Z]{io
void init(int[] data){ gi? wf
this.queue=new int[data.length+1]; |Y+[_D}
for(int i=0;i queue[++size]=data; [Fd[(
fixUp(size); *unJd"<*&@
} uy=<n5`oNG
} #D+.z)iZn
?/Aql_?3
private int size=0; 4`"Q!T_'
:|ytw=3>
private int[] queue; l2LO,j}
Fow{-cs_p
public int get() { t..@69
return queue[1]; HhTD/
} iSMVV<7
DCCijN
public void remove() { s*kSl:T@O
SortUtil.swap(queue,1,size--); aQ1n1OBr
fixDown(1); \AD|;tA\vE
} (rf8"T!"
file://fixdown <$nMqUu0
private void fixDown(int k) { Wb{8WPS
int j; W%#LHluP
while ((j = k << 1) <= size) { M;0\fUh;
if (j < size %26amp;%26amp; queue[j] j++; ':T"nORC
if (queue[k]>queue[j]) file://不用交换 ?=Mg"QU
break; M[=sQnnSFW
SortUtil.swap(queue,j,k); G^\.xk]
k = j; fd1z XK#Z2
} QnH~' k
} I9cZZ`vs
private void fixUp(int k) { ~0{F,R.$
while (k > 1) { vqwSOh|P9
int j = k >> 1; #X<s_.7DJ
if (queue[j]>queue[k]) )-LSn
break; ZV:0:k.x
SortUtil.swap(queue,j,k); m\|ie8
k = j; RLF]Wa,
} be&,V_F
} p-%m/d?
]. ^e[v6
} 'n!Sco)C
_ 3jY,*
} !~f!O"n)3r
#_fL[j&
SortUtil： ,09d"7`X
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package org.rut.util.algorithm; -<n]Sv;V
'.tg\]|
import org.rut.util.algorithm.support.BubbleSort; H?'t>JX
import org.rut.util.algorithm.support.HeapSort; U\tujK1
import org.rut.util.algorithm.support.ImprovedMergeSort; )u5+<OG}=
import org.rut.util.algorithm.support.ImprovedQuickSort; PPj0LFA
import org.rut.util.algorithm.support.InsertSort; f.u+({"ql
import org.rut.util.algorithm.support.MergeSort; Yg3emn|a
import org.rut.util.algorithm.support.QuickSort; Vg? 1&8>
import org.rut.util.algorithm.support.SelectionSort; ~@ hiLW
import org.rut.util.algorithm.support.ShellSort; }tH6E
GMoE,L
/** Nc[u?-
* @author treeroot 1"} u51
* @since 2006-2-2 8|\?imOp\[
* @version 1.0 t9m08K:Y
*/ t>(}LV.
public class SortUtil { NT [~AK9M
public final static int INSERT = 1; LD)P. f
public final static int BUBBLE = 2; xw&N[y5
public final static int SELECTION = 3; !5[5l!{x
public final static int SHELL = 4; 2z027P-Q
public final static int QUICK = 5; x]jJ
public final static int IMPROVED_QUICK = 6; X/`M'8v.%
public final static int MERGE = 7; nfjwWDH
public final static int IMPROVED_MERGE = 8; ;_=+h,n
public final static int HEAP = 9; *z\L
HFrwf{J
public static void sort(int[] data) { i6D66E
sort(data, IMPROVED_QUICK); =LMM]'no,
} T0P_&E@X
private static String[] name={ f^kH[C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =GSe$f?
}; 5IiZnGu
6.gk6
private static Sort[] impl=new Sort[]{ dgM@|&9*m
new InsertSort(), WkR=(dss8
new BubbleSort(), )Fh5*UC
new SelectionSort(), \L{V|}"X
new ShellSort(), q<Zza
new QuickSort(), k'JfXrW<!
new ImprovedQuickSort(), O;?Nz:/q
new MergeSort(), uu+)r
new ImprovedMergeSort(), *.F4?i2D
new HeapSort() use` y^c
}; ptEChoZ6
h1.<\GO
public static String toString(int algorithm){ &S+ooj
return name[algorithm-1]; Ow4H7sl
} X[KHI1@w
o+^5W
public static void sort(int[] data, int algorithm) { %6@->c{
impl[algorithm-1].sort(data); JP*VR=0k?
} dw]jF=u
._IBO;*@
public static interface Sort { 6E@qZvQ
public void sort(int[] data); &a bR}J[
} }IGoPCV|
j$Z:S~*
public static void swap(int[] data, int i, int j) { `5CuH
int temp = data; IG=#2 /$
data = data[j]; |#?:KvU97E
data[j] = temp; $c<NEt_\
} U[t/40W}P
} xb~8uD5